Buy Taper Pins Online in Australia
Taper Pin Selection — Quick Reference (DIN 1 / ISO 2339)
Taper pins are precision-ground conical pins driving into reamed tapered holes — self-locking, repeatable, vibration-resistant alignment + locking for machine assemblies. The 1:50 taper standard creates a wedging friction fit that won't back out.
| Designation | Standard | Best For |
|---|---|---|
| Metric Taper Pin (DIN 1 / ISO 2339) | 1:50 taper | European + Australian machinery — workshop default |
| Imperial Taper Pin (ANSI B18.8.1) | 1:48 taper | US-origin machinery + imported equipment |
| Threaded Internal Taper Pin (DIN 7977) | 1:50 taper + female thread | Easy extraction via puller — toolroom assemblies |
| Threaded External Taper Pin (DIN 7978) | 1:50 taper + male thread | Easy removal — driven through, threaded shaft used to extract |
| Plain Taper Pin (Champion Assortment) | — | Small + large size kits — workshop spares |
Installation rule: Drill at the SMALL end diameter; ream with a tapered reamer matching the pin standard (1:50 or 1:48). Pin driven from LARGE end, removed from SMALL end with pin punch. Critical: Don't substitute parallel pins — taper pins prevent fretting under cyclic vibration that loosens parallel pins. Brand: Champion. Companion: coupling pins, clevis pins, dowel pins, pin punches, roll pin guide.
Taper Pins — Precision Locating and Locking Pins for Machine Assembly
Taper pins are precision-ground conical pins used to align and lock components in machine assemblies — providing repeatable, self-locking positioning without threads or fasteners. AIMS Industrial stocks taper pin assortment kits from Champion covering small and large size ranges for workshop, toolroom and machine maintenance use.
How Taper Pins Work
A taper pin is driven into a tapered, reamed hole that passes through two or more components. The conical shape creates a wedging action as the pin is driven in — locking both components together with a tight friction fit. The self-locking taper means the pin will not back out under vibration or cyclic loading. Removal requires driving the pin out from the small end using a pin punch.
Applications
Taper pins are used wherever precise, repeatable alignment and secure locking of machine components is required: gear and sprocket-to-shaft connections, coupling alignment, toolroom fixtures and jigs, machine tool spindle assemblies, and instrument and gauge mechanisms. They are an alternative to keys and set screws where a thin cross-section requires a compact fastening method.
Champion Taper Pin Kits
Champion CA1690 small taper pin assortment kit contains 140 pieces covering the small standard sizes. Champion CA1700 large taper pin assortment kit contains 33 pieces covering larger standard sizes. Both kits cover DIN 1 taper pins in hardened carbon steel. Assortment refill packs allow individual sizes to be restocked without replacing the full kit.
Reaming Requirements
Taper pin holes must be reamed to the correct taper — a straight drilled hole will not produce the correct fit. Standard taper pin reamers are sized to match the pin taper (1:50 taper ratio to DIN 258). Always ream the hole progressively and test-fit the pin before driving to the final position.
Need a specific taper pin size outside the assortment range? Contact our team.
People Also Ask — Taper Pins
Q: What's a taper pin?
A taper pin is a cylindrical pin with a slight taper (1:50 standard) used to lock two parts together through a matching taper-reamed hole. The taper provides a frictional lock that resists vibration loosening. Used in mechanical engineering for: connecting shafts to hubs (couplings, gears, pulleys), locating dowels in precision assemblies, securing handle components. The tapered fit allows easy removal for service when needed. Available in metric (3-25mm typical) and imperial sizes.
Q: How do I install a taper pin?
1. Drill a parallel pilot hole through both parts using the smaller taper pin diameter. 2. Ream the hole with a matching taper reamer to the correct taper profile. 3. Test-fit the taper pin (should engage about 70-80% before becoming tight). 4. Drive the pin firmly into the hole using a hammer (gentle taps — don't deform the pin). 5. Verify the pin sits at the correct depth (typically slightly proud or flush, not below surface). Don't force pin too far — could damage the hole or the pin.
Q: Why use a taper pin vs a parallel pin?
Taper pin: frictional fit, resists rotation, easy to remove (drive out from small end), self-locking. Standard for hub-to-shaft locking and removable assemblies. Parallel (cylindrical) pin: precise alignment but doesn't lock — requires press fit or other locking. Standard for locating dowels. Match pin type to the application: removable locking joints = taper pin. Permanent press-fit alignment = parallel pin. The two can't substitute for each other.
Q: What sizes do taper pins come in?
Standard metric sizes (1:50 taper): 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 16mm, 20mm, 25mm at the small end (large end is 2% larger over the length). Length range typically 16-200mm. Imperial sizes (1:48 taper): numbered #0-#10 plus inch-based sizes. For workshop replacement work, match existing pin dimensions exactly — wrong-size pin won't engage correctly in the existing taper-reamed hole.
Q: Where do I get taper reamers for taper pins?
Taper reamers are matched to specific taper pin sizes — must be the same 1:50 taper rate. AIMS stocks taper reamers for common workshop sizes. For specialty applications, individual taper reamers available on indent. For occasional taper pin work, hand taper reamers (with T-handle) work; for production work, machine taper reamers (with proper holder) more efficient. Always lubricate during reaming — taper reamers cut sensitive material and chip easily.