Contour Measuring System Guide: Mitutoyo Formtracer Range, Stylus Methods & Profile Tolerance Verification

A contour measuring system — also called a form measuring machine, stylus profilometer, or contour measuring instrument — is a precision metrology instrument that uses a fine diamond-tipped stylus to trace across a workpiece surface and record the contour (form) and often the surface roughness in a single measurement. The instrument resolves form deviations down to nanometre level on premium models and is the industry tool for verifying profile of surface ⌒ tolerance under ISO 1101 on aerospace turbine blades, automotive cam profiles, gear teeth, medical implants, precision moulded parts and any feature where macro form geometry must be measured with micron-level accuracy.

This guide covers how contour measuring systems work, the Mitutoyo Formtracer and Contracer range (entry Contracer CV-2100 through to top-tier Formtracer Extreme CS-H5000CNC), stylus selection and the practitioner razor blade test for verifying tip condition, calibration to JIS B 7451, ISO 1101 profile tolerance verification, common applications in aerospace and automotive, and how the technology fits alongside profile projectors, vision measuring systems, CMMs, and surface roughness testers. The article is written for AU toolrooms, inspection labs, quality engineers, aerospace and automotive R&D teams, medical device manufacturers, and the maintenance teams responsible for capital metrology equipment specification.

What is a contour measuring system?

A contour measuring system is a stylus-based form measurement instrument that traces a precision diamond-tipped probe across a workpiece surface and records the resulting profile to nanometre-level accuracy. The instrument captures both the macro form geometry (the overall shape, curvature, radii, angles) and on combined units the micro surface texture (roughness Ra, Rz) of the same surface in a single trace. The most common AU industrial example is the Mitutoyo Formtracer range, which spans entry benchtop combined contour + roughness units through to top-tier Formtracer Extreme CNC systems used in aerospace and calibration laboratories.

The instrument is also referred to as a contour measuring machine, form measuring machine, stylus profilometer, surface profilometer, or contour tracer. Mitutoyo uses Formtracer for combined contour + roughness models and Contracer for contour-only models. Other industry brands — Mahr MarForm, Taylor Hobson Form Talysurf, Zeiss Contourecord, Jenoptik Hommel Etamic — use their own naming conventions but cover the same fundamental capability.

Contour measuring systems are essential for inspection work that profile projectors and CMMs cannot handle well. Profile projectors only see 2D silhouette; they cannot trace continuous form along a 3D profile. Touch-probe CMMs take discrete points and struggle with complex profile tolerances. Practitioner consensus on Practical Machinist captures this clearly: "For complex shapes that are milled then you'll need substantially more points. For complex shapes, you need to start looking for a scanning head CMM" (PM thread 275660). A stylus contour measuring system gives continuous-trace data with thousands of points per profile — exactly what complex profile tolerance verification needs.

Out of scope: contour gauges, blood-sugar meters, surveying contour maps

This guide is scoped exclusively to industrial stylus-based contour measuring instruments. Several other products share the word "contour" but are entirely different categories — they are out of scope.

• Contour gauge (profile duplicator) — the cheap consumer woodworking tool with rows of plastic or metal pins that copy the shape of a moulding or tile profile. Found at Bunnings, hardware stores, Amazon — typically under fifty dollars. A useful DIY copying tool for flooring, skirting, and tile work. Not a measurement instrument. It produces a visual template, not a dimensional measurement to micron accuracy.
• Bayer Contour blood glucose meter — medical diabetes testing equipment. Different product category entirely.
• Contour map measuring tools — surveying and topographic mapping equipment. Different field.
• Body contour measuring — dressmaking, medical orthopaedic, fitness assessment. Different product class.
• Optical comparator — silhouette projector for 2D inspection. Adjacent but distinct — see the AIMS Profile Projector Guide for that category.

If you are searching for any of the above, this guide will not be the right resource. The rest of this guide covers only industrial stylus-based contour measuring instruments used to verify form geometry on machined, moulded, or stamped components to micron-level accuracy.

How a contour measuring system works

A contour measuring system works by drawing a precision diamond stylus across the workpiece surface at controlled speed and constant force, while the system continuously records the vertical (Z-axis) displacement of the stylus tip and the horizontal (X-axis) position from the precision linear scale. The result is a high-resolution profile trace of the surface contour — thousands of (X, Z) data points per millimetre of traverse — which the analysis software then compares against the nominal CAD geometry to compute form deviation.

The basic anatomy is: precision X-axis linear scale stage (typically with sub-micron resolution) → Z-axis detector unit (the column carrying the stylus arm) → diamond stylus tip on a hinged arm with calibrated tip radius (2 μm, 5 μm, or 10 μm) → constant-force measurement system (active control on premium models) → analysis software (FORMTRACEPAK on Mitutoyo Formtracer). The workpiece is mounted on a precision levelling fixture, the stylus is lowered to make contact, and the X-axis traverse begins.

Two output types are standard. Contour mode captures macro form geometry — overall profile, radii, angles, deviation from CAD nominal — for profile of surface ⌒ tolerance verification under ISO 1101. Roughness mode captures micro surface texture parameters (Ra, Rz, Rmax, RSm) per ISO 4287 / ISO 21920. Mitutoyo Formtracer and equivalent combined units capture both in the same trace via the analysis software, with Gaussian filtering separating macro form data from micro roughness data. The Formtracer Avant uniquely allows tool-free swap between dedicated contour and dedicated roughness detector modules in seconds.

Contour vs surface roughness — same instrument, different inspection objective

Contour measurement and surface roughness measurement are two different inspection objectives that often run on the same stylus profilometer. Contour measurement is concerned with macro form geometry — the overall shape of the part as it should be vs as it is. Surface roughness measurement is concerned with micro surface texture — the fine peaks and valleys on a single surface at the micron and sub-micron scale. The two data sets come from the same stylus trace but are separated mathematically by a Gaussian filter at the cut-off wavelength specified in ISO 4287 or ISO 21920.

For the surface roughness deep-dive on Mitutoyo Surftest SJ-210/310/410 portable range and combined Formtracer SV-C4500 systems, see the dedicated AIMS Surface Roughness Guide. This article focuses on contour measurement — the macro form geometry inspection where the contour measuring system is the primary tool.

Contour measuring vs profile projector

A profile projector projects a magnified silhouette of the workpiece onto a screen for 2D measurement. A contour measuring system traces a stylus continuously along the workpiece surface and captures full 3D form geometry along the trace line. The two instruments are complementary rather than competitive — a profile projector wins on speed for thread profile and 2D outline work where mylar overlay charts give instant pass/fail; a contour measuring system wins on full-profile continuous trace, Z-axis depth, and ISO 1101 profile tolerance verification.

Contour measuring vs CMM — why scanning beats touch-probing

A traditional touch-probe CMM measures discrete points one at a time and reconstructs the part geometry from a finite number of probed points. A stylus contour measuring system scans continuously across the surface, capturing thousands of (X, Z) data points per second along the trace line. For features with simple geometry (planes, cylinders, spheres) the CMM touch-probe approach is efficient. For complex profile tolerances on curved or moulded surfaces, scanning is essentially mandatory.

The practitioner consensus on Practical Machinist makes the point directly. From PM thread 275660 (CMM inspection of 3D profile tolerance): "When checking profile tolerance on a surface with localized deviations to a fairly close tolerance, you can't take enough points. How the feature is manufactured matters — if it's a flat plate that's ground then a few points is probably acceptable, but if it's a complex shape that's milled then you'll need substantially more points. For complex shapes, you need to start looking for a scanning head CMM." This is the gap the contour measuring system fills — scanning is its primary mode, not an optional add-on.

From PM thread 230580 (Shops with no CMM): "Profile tolerances (both 2D and 3D) are examples of things that would be difficult to measure without a CMM." A stylus contour profilometer effectively delivers scanning CMM capability on a single axis at much lower capital cost than a full scanning CMM, which is why aerospace, automotive, and medical device QC labs typically run both — a CMM for general 3D dimensional inspection plus a contour measuring system for profile tolerance verification on critical curved surfaces.

From Eng-Tips thread 393709 (CMM Data Filtering): "When filtering data on a CMM with active scanning head, filtering is needed when you have a lot of data, let's say: more than 250 points per revolution." The Gaussian filter handling is built into FORMTRACEPAK on Mitutoyo Formtracer — the operator does not need to manually configure point density management because the system is purpose-built for high-density scan data.

Mitutoyo Formtracer + Contracer range decoded

Mitutoyo is the global benchmark in stylus-based contour measurement, with a product range spanning entry contour-only units through to top-tier CNC combined contour + roughness systems used by calibration laboratories and aerospace R&D. AIMS supplies the full Mitutoyo Formtracer and Contracer range across Australia.

The Formtracer Extreme CS-H5000CNC is the global benchmark for stylus-based form measurement accuracy. X1-axis maximum drive speed 40 mm/s, Z2-axis maximum drive speed 200 mm/s. The Z1-axis detector employs an active control method that restricts variation in dynamic measuring force — critical for repeatable form measurement across different materials and stylus loadings. The unit ships with a cabin (vibration and thermal isolation enclosure) and a vibration stand as standard.

The Formtracer Avant is the unique flexibility play in the range. Per Mitutoyo's marketing, it "turns from a surface roughness instrument into a contour measuring device and vice versa within seconds — without tools." A practitioner-confirmed advantage is the 0.05 mm minimum positioning increment, which enables full-face gear tooth flank evaluation from root to tip. For workshops that need both contour and roughness capability but can't justify a dedicated unit for each, the Avant is the right specification.

Software: FORMTRACEPAK across the Mitutoyo range. Supports measurement control, contour analysis, surface roughness analysis, design data creation, and data correction for inclination and curved surface. Integration with Mitutoyo MeasurLink for SPC data export is standard.

Stylus selection — radius, cone angle, force

Stylus selection determines what the instrument can resolve. The standard governing stylus geometry is ISO 3274, which specifies conisphere styli with tip radius of 2, 5, or 10 micrometres and cone angle of either 60° or 90°. The choice depends on what is being measured — contour-only, fine roughness, or combined — and on the cost vs durability trade-off practitioners actually make on the shop floor.

The practitioner trade-off is captured by Gear Solutions Magazine: "For surfaces with Ra between 0.5 µm and 2 µm, a 5-micron tip can be used without significant differences in the measured results according to ISO-3274. However, precision tooth flank roughness is now typically in the 0.1 – 0.5-micron Ra range. When roughness is approaching the lower end of this range, the use of a 2-micron tip is needed for accurate measurements." For pure contour-only work on a Contracer CV-3200, the 5 μm or 10 μm stylus is the right specification — it filters surface roughness out of the contour data without needing extra software correction.

Diamond tip material is mandatory for precision. Lesser tip materials drift in radius over service life as the tip wears, which silently invalidates measurement traceability. Diamond is the only practitioner-accepted material on industrial stylus profilometers in regulated quality environments.

The razor blade test — verifying stylus tip condition

The razor blade test is the practitioner-standard verification method for checking whether a stylus tip is still within its rated radius specification. The technique is documented across Practical Machinist threads and trade publications and is the gold-standard cross-check that calibration certificates alone cannot deliver — because a calibration certificate verifies the instrument with a specific stylus, but daily damage to the stylus invalidates the certificate.

The mechanism works because a brand-new sharp razor blade has an edge radius substantially smaller than a 2 μm stylus tip. When the stylus traces across the blade, the geometry is reversed — the blade profiles the stylus rather than the other way around. From Practical Machinist thread 349886 (How do Mitutoyo Profilometer Stylii work?): "You can scan over the edge of a brand new sharp razor blade, as the blade will be way sharper than 2 microns and a typical profilometer tip is a 60 degree cone with a 2 micron radius at the end — if you trace the blade and get a 2 micron radius, the tip is good."

How to perform the razor blade test:

1. Take a brand new sharp razor blade (single-edge or double-edge), unwrap immediately before use to avoid contamination or oxidation of the cutting edge.
2. Mount the blade vertically between two precision parallel blocks of similar height, with the cutting edge facing upward and standing proud of the blocks by a few millimetres.
3. Position the contour measuring system stylus over the blade edge, lower to contact, and traverse perpendicular to the edge.
4. Capture the trace and analyse the resulting profile shape in FORMTRACEPAK (or equivalent software).
5. The trace shape will be the reverse profile of the stylus tip — if the tip radius reads close to 2 μm (for a 2 μm stylus) with a clean conisphere shape, the tip is in good condition. If the radius reads larger, the tip is worn. If the trace shows asymmetry or a flat region, the tip is damaged (truncated, rolled-over, or chipped) and should be replaced.

Practitioner setup caveat from PM thread 349886: "Getting a blade trapped between two blocks such that the stylus stays in range and doesn't dip too much next to the blade can be difficult." The blade must be mounted so the stylus stays inside its measurement range across the full traverse — otherwise the stylus drops off the blade edge and damages itself on the supporting blocks. Two precision parallels of identical height with the blade sandwiched between them is the simplest fixture; some workshops machine a dedicated blade-holding jig.

The razor blade test does not replace formal NATA calibration but it provides the practitioner with a cheap, fast daily check between formal calibrations. A stylus that fails the razor blade test should be replaced immediately and the instrument recalibrated with the new stylus.

Calibration to JIS B 7451 and NATA traceability

Contour measuring systems require periodic calibration to verify both the X-axis stage and Z-axis detector accuracy and to maintain measurement traceability to national standards. The industry consensus is 6-month calibration intervals for high-use production environments, 12 months for standard QC lab use, and the additional requirement of recalibration immediately after every stylus change — because a calibration certificate verifies the instrument with the specific stylus that was fitted at the time of calibration.

The primary standard is JIS B 7451 (the Japanese Industrial Standard for contour measuring instruments). For combined contour + roughness units that capture surface texture parameters as well, JIS B 7452 applies for the roughness side. In Australia, NATA-accredited calibration providers reference JIS B 7451 + JIS B 7452 when issuing traceable calibration certificates for Mitutoyo Formtracer instruments. NATA-traceable calibration is mandatory for any contour measuring system used in ISO 9001-audited quality systems, medical device manufacturing (TGA), aerospace, automotive (IATF 16949), or regulated industries.

A practitioner-validated complement to formal calibration is the Precision Reference Standard 3-Patch referenced on Practical Machinist thread 428886 (Measuring surface finish: What standard to calibrate machine?) — a multi-patch reference specimen designed to allow the user to perform several important calibration checks on stylus-type surface measuring instruments. It does not replace NATA calibration certification but provides the daily-check verification that a formal annual certificate cannot deliver.

From PM thread 408952 (Calibrate both the Profilometer & Roughness Standard) — the title itself captures practitioner reality: routine calibration must cover both the instrument AND the reference standard used to calibrate it. A drifted reference standard silently corrupts all calibration of the instrument that uses it. Send both for periodic NATA recalibration.

Profile tolerance (⌒) under ISO 1101 — what contour measurement verifies

Profile of surface tolerance (⌒) under ISO 1101 specifies a tolerance zone defined by a surface offset equidistant from the nominal CAD geometry. For a ±0.05 mm profile tolerance, the actual surface must lie within a zone 0.05 mm above and 0.05 mm below the nominal surface, measured normal (perpendicular) to the nominal at each point. This is fundamentally different from a linear ±0.05 mm dimensional tolerance — the deviation is calculated along the normal vector at each point, not along an X-Y-Z axis.

From Practical Machinist thread 306418 (Profile of a Surface) — practitioner working with a 1.5 mm profile tolerance: "The profile needs to be contained within a zone that is 0.75 mm smaller than nominal to 0.75 mm bigger than nominal." Bilateral interpretation — the tolerance is split equally either side of nominal unless specified as unilateral (⌒ U for upper-side only) or otherwise modified by ISO 1101 callouts.

The contour measuring system captures a continuous (X, Z) profile trace, then the analysis software (FORMTRACEPAK for Mitutoyo) calculates the deviation between each measured point and the nominal CAD surface along the normal direction at that point. The result is a profile deviation plot showing exactly where the part is in or out of the tolerance zone. From CMM Quarterly (aerospace inspection trade publication): "The profile deviation at any point is calculated as the shortest distance between the measured point and the nominal surface, usually orthogonal to the surface (not just X/Y/Z deviations)."

For 2D profile tolerance verification (e.g. a turbine blade leading edge in section, a cam profile), a single stylus trace along the profile line gives complete coverage. For 3D profile tolerance (e.g. a freeform machined surface), multiple parallel traces or a CNC raster pattern are required — the Formtracer Extreme CS-H5000CNC and CS-5000CNC handle this automatically via programmed CNC trace patterns.

Common applications

Contour measuring systems are essential capital equipment in industries where profile tolerance verification is critical. The instrument is the primary inspection tool wherever ISO 1101 profile ⌒ tolerance appears on engineering drawings and conventional CMM touch-probing cannot capture sufficient point density.

• Aerospace turbine and compressor blades — airfoil profile tolerance typically ±0.05 mm to ±0.30 mm depending on criticality. Vibration stand and active force control on Formtracer Extreme CS-H5000CNC essential for repeatable measurement at this accuracy class.
• Automotive cam profiles — cam lift, base circle, ramp profile, nose radius. The continuous trace captures the full 360° cam profile and verifies actual lift vs nominal at every crank angle.
• Gear tooth flank inspection — involute profile, lead, pitch verification on small gears. Formtracer Avant with appropriate stylus measures full tooth face from root to tip via the 0.05 mm minimum positioning increment.
• Medical implant geometry — orthopaedic implant articulating surfaces, dental implant abutment profiles, spinal cage geometry. FDA / TGA / EU MDR regulatory environments require traceable measurement — NATA calibration mandatory.
• Precision moulded parts — injection-moulded plastic and rubber components, die-cast metal parts, wax patterns for investment casting. Non-contact pressure essential to avoid deforming soft mouldings — light-force contact stylus on premium units handles this.
• Ball bearing race geometry — raceway profile, contact angle, runout — all measurable on a contour profilometer at higher point density than a CMM scan.
• Optical component substrates — lens blanks, mirror substrates, optical fibre ferrules. Sub-micron form accuracy mandatory.
• Calibration laboratory work — reference standard verification, gauge block surface form, profile reference specimen measurement. Top-tier Formtracer Extreme is itself a calibration-grade instrument.
• R&D and reverse engineering — capturing legacy part profiles where no CAD nominal exists.

Common mistakes and operator errors

Stylus profilometers are mechanically simple but several recurring operator errors silently corrupt measurement data. The list below combines Practical Machinist forum threads, Eng-Tips threads, and trade publication practitioner content.

Brand landscape — Mitutoyo, Mahr, Taylor Hobson, Zeiss

The stylus contour measuring market has four major global manufacturers, each with strong AU distributor support. The choice depends on accuracy class, integration with existing metrology ecosystem, software preference, and budget.

For AU buyers, Mitutoyo dominates by sheer presence of distributor support, calibration availability, parts inventory, and operator familiarity. The Formtracer Avant range in particular has gained significant share since launch because the interchangeable detector model fits the mid-size AU manufacturing workshop where dedicated contour and dedicated roughness instruments would not both be justified. Mahr and Taylor Hobson hold ground in calibration laboratories and aerospace QC departments where European OEM specifications drive the choice. Zeiss appears where the buyer is already a Zeiss CMM user and wants ecosystem integration.

Buying considerations — accuracy class, automation, software

Specifying a contour measuring system involves four decisions that together determine cost and capability. AIMS sales team can help work through these for any AU buyer evaluating the Mitutoyo Formtracer range.

1. Contour-only vs combined contour + roughness. Contracer CV series for contour-only — lower cost, fewer accessories, simpler operation. Formtracer CS / SV-C / Avant / Extreme for combined — higher capability, broader application, future-proof against changing inspection requirements. The Avant interchangeable-detector option splits the difference for budget-constrained workshops.
2. Manual benchtop vs motorised CNC. Manual benchtop (CS-3200, SV-C3200/4500, Avant, Contracer CV) for variable inspection workloads with skilled operators. Motorised CNC (Extreme CS-5000CNC and CS-H5000CNC) for high-volume repeat inspection where programmed CNC trace patterns deliver throughput and consistency.
3. Accuracy class. JIS B 7451 standard class for workshop and general QC. Premium class (CS-H5000CNC with 5 nm X1 / 0.8 nm Z1 resolution) for aerospace, calibration lab, and ultra-precision R&D. The accuracy step from standard to premium adds significant capital cost — match to the actual tolerance requirements of the parts being inspected, with the 10:1 Test Uncertainty Ratio rule applied.
4. Software and SPC integration. FORMTRACEPAK is standard on the Mitutoyo range. For sites already running Mitutoyo MeasurLink for SPC, direct integration is supported. For sites with other SPC platforms, FORMTRACEPAK exports CSV, MS Excel, and standard quality system formats. Confirm SPC integration requirements before specifying.

Additional buyer-side considerations: NATA-traceable calibration must be coordinated at delivery (AIMS handles via approved AU partners). Operator training is essential — the instruments are simple to operate but proper stylus handling, calibration procedure, and FORMTRACEPAK software fluency take 2–5 days of training for full proficiency. Vibration isolation matters at the premium accuracy class — the CS-H5000CNC includes vibration stand as standard; benchtop Formtracer units may benefit from a dedicated metrology bench at AU sites with significant shop-floor vibration.

AIMS supply, configuration and Australian calibration

AIMS Industrial supplies the Mitutoyo Formtracer and Contracer range across Australia. We coordinate configuration, delivery, installation, operator training, and NATA-traceable calibration to JIS B 7451 via approved Australian partners. For any contour measuring system enquiry, our team can quote the right Mitutoyo model for the application, configure with the appropriate stylus combination (2 μm / 5 μm / 10 μm and ball stylus options), specify the detector module (contour-only vs combined contour + roughness, or interchangeable on the Avant), and arrange supporting accessories — precision levelling fixtures, reference specimens, calibration master gauges, stylus replacement inventory.

Lead times depend on configuration and Mitutoyo Australia stock holdings. Stock configurations of Formtracer CS-3200 and Avant typically ship within 4–8 weeks. Premium configurations (Formtracer Extreme CS-H5000CNC with cabin, vibration stand, and Laser AF detector) typically run 12–20 weeks given the lower stock turnover at the top of the range. AIMS sales team can confirm current lead time on any specific configuration.

For sites already running a Mitutoyo Formtracer, AIMS supplies the accessory and consumable range — replacement diamond styli (Mitutoyo OEM only, never third-party), reference specimens, NATA recalibration coordination, FORMTRACEPAK software updates, and operator training refresher courses for new staff.

The Mitutoyo Formtracer range is not commodity capital equipment — it is specified by AU aerospace manufacturers, automotive Tier 1 suppliers, medical device manufacturers, gear and bearing OEMs, calibration service providers, and R&D departments. The right specification depends on the parts being inspected, the tolerance class, the production volume, and the existing metrology ecosystem at the site. Contact our team for application-specific advice.

Frequently Asked Questions

What is a contour measuring system?

A contour measuring system is a precision metrology instrument that uses a fine diamond-tipped stylus to trace across a workpiece surface and record the contour (form) and on combined models the surface roughness in a single measurement. The instrument resolves form deviations down to nanometre level on premium models and is the industry tool for verifying profile of surface ⌒ tolerance under ISO 1101 on aerospace turbine blades, automotive cam profiles, gear teeth, medical implants, and precision moulded parts.

What is the difference between a contour measuring machine and a contour gauge?

A contour measuring machine is a precision industrial instrument that uses a stylus, X-Y stage and Z-axis detector to measure form geometry to micron-level accuracy. A contour gauge (also called a profile duplicator or shape duplicator) is a cheap consumer woodworking tool with rows of plastic or metal pins that copy the shape of a moulding or tile profile for template-creation purposes. The two share the word "contour" but are different categories — the gauge is a DIY copying tool, the measuring machine is a precision metrology instrument.

How does a contour measuring system work?

A diamond stylus tip is drawn across the workpiece surface at controlled speed and constant force while the system continuously records the vertical (Z-axis) displacement of the stylus and the horizontal (X-axis) position from the precision linear scale. The result is a high-resolution profile trace — thousands of (X, Z) data points per millimetre of traverse — which the analysis software compares against the nominal CAD geometry to compute form deviation. Combined contour + roughness units capture surface texture parameters from the same trace via Gaussian filtering at the standard cut-off wavelength.

What is the difference between contour and surface roughness measurement?

Contour measurement captures macro form geometry — the overall shape of the part, radii, angles, profile deviation from CAD nominal — at the millimetre-to-tens-of-millimetres scale. Surface roughness measurement captures micro surface texture — the fine peaks and valleys of a single surface at the micrometre and nanometre scale, expressed as parameters like Ra, Rz, Rmax. The two come from the same stylus trace but are separated mathematically by a Gaussian filter at the cut-off wavelength specified in ISO 4287 or ISO 21920.

What is a Mitutoyo Formtracer?

Mitutoyo Formtracer is the brand name for Mitutoyo's combined contour and surface roughness stylus measuring systems. The range includes the entry Formtracer CS-3200, mid-tier SV-C3200/4500, the interchangeable-detector Formtracer Avant, and the top-tier Formtracer Extreme CS-5000CNC and CS-H5000CNC. The Contracer name covers the contour-only models — CV-2100, CV-3200, CV-4500. All conform to JIS B 7451 for contour measurement accuracy.

What is the difference between the Formtracer Extreme CS-H5000CNC and CS-5000CNC?

Both are CNC combined contour + roughness measuring systems with motorised X-Y-Z stage control and Laser AF capability. The CS-H5000CNC is the higher-accuracy variant with X1-axis resolution of 5 nm and Z1-axis resolution of 0.8 nm / 1.6 nm — the global benchmark for stylus-based form measurement accuracy. The CS-5000CNC is the production-tier variant with slightly relaxed accuracy specifications and lower capital cost. The CS-H5000CNC is specified for aerospace R&D, calibration service providers, and ultra-precision QC; the CS-5000CNC is specified for high-volume production inspection.

What is the Mitutoyo Formtracer Avant?

The Formtracer Avant is a benchtop hybrid measuring system with interchangeable detector modules — the operator can swap between a dedicated contour detector and a dedicated surface roughness detector in seconds, without tools. The Avant turns from a contour measuring instrument into a surface roughness instrument and vice versa, making it the right specification for workshops that need both capabilities but cannot justify two dedicated units. It also features a 0.05 mm minimum positioning increment that enables full-face gear tooth flank evaluation from root to tip.

Can a contour measuring system measure surface roughness too?

Yes — combined Formtracer models (CS-3200, SV-C3200/4500, Avant, Extreme CS-5000CNC / CS-H5000CNC) capture both contour and surface roughness in a single stylus trace, with Gaussian filtering separating the macro form data from the micro surface texture data. Contour-only Contracer models (CV-2100, CV-3200, CV-4500) measure contour only — for surface roughness those buyers would specify a separate Surftest unit or upgrade to a combined Formtracer.

What is JIS B 7451?

JIS B 7451 is the Japanese Industrial Standard for contour measuring instruments. It defines the test methods, the measurement accuracy specifications across the X-axis stage travel, and the Z-axis detector accuracy requirements for stylus contour measurement systems. Mitutoyo Contracer and Formtracer instruments are designed to conform to JIS B 7451. AU NATA-accredited calibration laboratories reference JIS B 7451 when issuing traceable contour measurement calibration certificates. The companion standard JIS B 7452 covers the surface roughness side of combined units.

What stylus radius should I use?

Follow ISO 3274 guidance. For workshop default surface roughness measurement on surfaces with Ra between 0.5 μm and 2 μm, use a 5 μm radius 90° cone stylus. For precision fine roughness measurement on surfaces with Ra below 0.5 μm (precision gear tooth flank, optical components), use a 2 μm radius 60° cone stylus — but this stylus is more delicate and costly, and practitioner reality is that the 2 μm tip should be minimised on shop floor work. For contour-only measurement, a 5 μm or 10 μm stylus filters fine surface texture out of the contour data and lasts longer in service.

How do I check if my stylus tip is still in good condition?

The practitioner-standard verification method is the razor blade test. Mount a brand new sharp razor blade vertically between two precision parallel blocks with the cutting edge facing up, then trace the stylus across the blade perpendicular to the edge. The resulting profile is the reverse of the stylus tip shape — if the radius reads close to the rated value (2 μm for a 2 μm stylus) with a clean conisphere shape, the tip is good. If the radius reads larger, the tip is worn. If the trace shows asymmetry or a flat region, the tip is damaged and should be replaced. The razor blade test does not replace formal NATA calibration but provides a fast daily check.

How accurate is a contour measuring machine?

Accuracy varies dramatically across the range. Entry contour-only Contracer CV-2100 and benchtop Formtracer CS-3200 typically operate at the micron level (±1 μm to ±5 μm). Premium CNC units (Formtracer Extreme CS-5000CNC and CS-H5000CNC) operate at the sub-micron and nanometre level (X1: 5 nm, Z1: 0.8 nm resolution on the CS-H5000CNC). Real-world measurement uncertainty also depends on stylus condition, calibration currency, part levelling, environmental temperature stability, and operator technique — the published accuracy class is the instrument capability under ideal conditions.

What is profile of surface tolerance under ISO 1101?

Profile of surface tolerance (⌒ under ISO 1101) specifies a tolerance zone defined by a surface offset equidistant from the nominal CAD geometry. For a ±0.05 mm profile tolerance, the actual surface must lie within a zone 0.05 mm above and 0.05 mm below the nominal surface, measured normal (perpendicular) to the nominal at each point. The deviation is calculated along the normal vector at each point on the surface, not along an X-Y-Z axis. Contour measuring systems verify this directly via continuous stylus trace and FORMTRACEPAK normal-direction deviation analysis.

How much does a Mitutoyo Formtracer cost?

Pricing varies significantly across the range. Entry Contracer CV-2100 and Formtracer CS-3200 are at the lower end of capital metrology equipment — comparable to a mid-range CMM per dollar. The Formtracer Avant with interchangeable detectors sits in the mid-tier. The Formtracer Extreme CS-5000CNC and CS-H5000CNC are premium capital equipment, comparable with mid-to-high-end CMMs given the inclusion of cabin, vibration stand, and CNC automation. Specific AU pricing depends on configuration (stylus combination, detector type, software options, calibration) — contact AIMS for a current quote.

Does AIMS supply Mitutoyo Formtracer in Australia?

Yes. AIMS Industrial supplies the full Mitutoyo Formtracer and Contracer range across Australia — Contracer CV-2100 / CV-3200 / CV-4500 contour-only, Formtracer CS-3200 and SV-C3200/4500 combined contour + roughness benchtop, Formtracer Avant interchangeable detector hybrid, Formtracer Extreme CS-5000CNC and CS-H5000CNC premium CNC systems. We configure each unit with the right stylus combination, detector module, software options, and supporting accessories, and coordinate delivery, installation, operator training, and NATA-traceable calibration to JIS B 7451 via approved AU partners. Contact our team on (02) 9773 0122 for pricing and current lead times.

Pair this with our GD&T Symbols Guide for the AS/NZS 1100 and ASME Y14.5 symbol reference.

Need to size or replace a V-belt? Our How to Measure a V-Belt guide covers length, section and cross-reference.