Bearing Brand Comparison: NACHI, NSK, Koyo, NTN — Australia's Century-Old Japanese Bearing Houses

Jul 8, 2026 AIMS Industrial

AIMS Industrial is an Australian bearing distributor. Our deepest range sits across the Japanese Tier-1 houses that have been engineering precision bearings for over a century — NACHI (founded 1928), Koyo (1921), NSK (1916), NTN (1918), plus the Japanese specialty houses (FYH, IKO, EZO, IJK). Beyond that we distribute a broad range of specialty and premium bearing brands to match whatever your application demands.

This is the honest Australian buying guide — Japanese Tier-1 rankings, other brands AIMS distributes for specialty applications, the myths customers still believe about bearings, and the seal, clearance and installation calls that sink more bearings than the brand ever does.

The Japanese Tier-1 Houses — Every One Over a Century Old

Not new-technology "alternatives" to European brands — the opposite. These houses have been manufacturing precision bearings continuously since the First World War era. Every major brand in the AIMS Japanese range founded between 1916 and 1928, refined over four generations of Japanese industrial engineering.

Brand	Founded	Origin story
NSK	1916	Tokyo. Japan's first ball bearing manufacturer — over a century of continuous production.
NTN	1918	Began as Nishizono Ironworks in Kuwana, Mie Prefecture; the NTN brand debuted in 1923 via Tomoe Trading, and NTN Manufacturing was formally established 1927 in Osaka.
Koyo (JTEKT)	1921	Founded as Koyo Seiko in Osaka. Merged with Toyoda Machine Works in 2006 to form JTEKT — hence the Toyota Group connection.
NACHI	1928	Founded as Nachi-Fujikoshi in Toyama — started in cutting tools, expanded into bearings and machine tools.
IJK	1944	Founded as Nihon Jikuuke Kogyo; renamed Inoue Jikuuke Kogyo in 1949. Japanese miniature, angular contact and stainless ball bearing specialist.
FYH	1946	Started as Kobayashi Ironworks (a foundry); became Kobayashi Seiko in 1950 and began making mounted bearing units, later renamed Nippon Pillow Block. Oldest and largest mounted-unit maker in Japan.
IKO	1950	Nippon Thompson, Tokyo — Japan's needle roller pioneer.
EZO	1960	Founded as Johoku Bearing in Sapporo; renamed Sapporo Precision in 1984. EZO is the international brand name — miniature and stainless miniature specialty.

Nine decades of Japanese industrial engineering, in stock in Milperra, matched to Australian trade applications by a sales team with 40+ years across the trade.

Which Japanese Brand Should You Choose?

Honest position after 40 years specifying and troubleshooting bearings in Australian industry: in most everyday applications, the Tier-1 Japanese brands are functionally equivalent. Fitters mix them and match them without issue, and the equipment runs fine.

Brand starts to matter when the application pushes into precision, 24/7 continuous operation, or harsh environmental conditions (more on that below). For general workshop replacement, choose based on availability, price, or OEM match.

Where each Japanese brand in the AIMS range earns its recommendation:

NACHI — leading Japanese manufacturer across general industrial and CNC. Strong across ball, roller and specialty families. AIMS's deepest single range. If you're not sure which Japanese brand to pick and the equipment is general industrial, NACHI is the safe first call.
Koyo (JTEKT) — Toyota Group heritage. Automotive and railway precision credentials, applied to industrial bearings. Choose Koyo where you want automotive-grade tolerances applied to industrial replacement.
NSK — deep OEM specification. If the machine came with NSK bearings from the factory, replacing with NSK holds the OEM spec exactly. NSK has numerous brands under its banner and is widely specified in original equipment worldwide.
NTN — full-range Japanese depth. Deep bearing catalogue including specialty types. Strong when NSK or NACHI don't carry the exact spec.
FYH — the mounted-unit specialist. If you're specifying UCP, UCF or UCFL pillow blocks and flanges, FYH is the Japanese reference. Widely used in agricultural and food processing installations.
IKO — needle roller and linear motion depth. Where the general-purpose brands stop carrying the range, IKO keeps going. Automotive-adjacent applications (differential bearings, motorcycle clutch baskets, U-joints) — IKO is the specialist.
EZO — miniature and stainless miniature specialty. Small-bore bearings where the top-tier all-rounders don't carry the range. Instruments, small motors, medical, precision equipment.
IJK — workshop-grade Japanese engineering. Properly engineered Japanese bearings at a workshop-grade price point. Fit for hand tools, low-duty fans, non-critical drive assemblies. Not the choice for precision, 24/7, or harsh environments.

Other Bearing Brands AIMS Distributes

Beyond the Japanese Tier-1 range, AIMS distributes a broad selection of specialty and premium bearing brands for applications where a specific brand or bearing family is called for.

Brand	Origin	Position
Timken	USA	Tapered roller bearings — Timken invented them and still the benchmark. First pick for heavy axle, gearbox, mining, rail and transport applications where taper does the work. AIMS distributes the Timken range for these specialty applications.
McGill	USA (Regal Rexnord)	Needle roller and cam follower specialty — deep range in cam followers, cam yoke rollers, needle bearings. Where a McGill part number is called out on equipment drawings, AIMS distributes the McGill range.
BECO	Italy	Food-grade stainless bearing specialist. When an application needs genuine stainless for wash-down environments (food processing, marine, pharmaceutical), BECO is the reference. AIMS supplies BECO stainless (see Story 1 below).
Asahi	Japan	Bearing units and housings — an alternative to FYH in the pillow block and flange bearing category. AIMS distributes both for range depth in mounted units.
RBC Bearings	USA	Aerospace and defence-grade specialty — spherical plains, rod ends, thin-section and engineered specials where a standard catalogue bearing won't do. Premium specialist positioning; AIMS distributes RBC where the application justifies it.
Durbal	Germany	Rod ends and spherical plain bearings. Long-standing German precision brand in the rod-end category.
Nadella	France	French needle bearing manufacturer with a specialty range not always covered by the top-tier Japanese houses.
PFI Bearings	Italy	Italian bearing manufacturer covering standard and specialty ranges.
Rollway	USA	Cylindrical roller bearing specialty.
Link-Belt	USA	Mounted bearing unit specialty — long-standing American brand in the pillow block and flange bearing category.
JAMA	Est. 2005	Standard bearing range covered where availability suits the customer's need.
JNS / MTK	Japan / specialty	Specialty Japanese ranges available for specific niche applications.

If you're specifying a brand from the above list, ring AIMS with the part number — the sales team will confirm availability and lead time. Or if you want a second opinion on whether one of the Japanese Tier-1 brands would suit the application just as well, we'll happily walk you through the trade-off.

Brands AIMS Doesn't Currently Carry — And What To Do About It

Some well-known bearing brands aren't currently in the AIMS range. The main ones you might ask about:

SKF (Sweden, founded 1907) — the traditional European gold standard. Not currently carried at AIMS.
Schaeffler (INA / FAG) (Germany) — European powerhouse running two brands under one roof. Not currently carried.
RHP (UK, NSK-owned) — British heritage brand progressively folding into the NSK catalogue. Cross-reference to NSK when possible.
NMB (Japan, Minebea Mitsumi) — miniature specialty; overlaps with EZO in the AIMS range.
Torrington (USA, acquired by Timken 2003) — no longer a standalone brand. Cross-reference to Timken (which AIMS distributes).

If you need any of these brands specifically, contact AIMS:

Phone: (02) 9773 0122
Email: sales@aimsindustrial.com.au

We'll always look at sourcing the exact brand you want, or recommend a quality equivalent from the range we distribute. The Japanese Tier-1 houses cover most SKF and Schaeffler applications at equal or better performance; where you need a specific brand identifier for engineering drawings, warranty or legacy reasons, we'll do what we can to source.

When Brand Actually Matters (And When It Doesn't)

Honest position: in everyday applications — general fans, standard drive assemblies, low-to-medium-speed equipment — the quality Japanese and European brands are largely interchangeable. Fitters mix and match, and the equipment runs fine.

Brand starts to matter when the application pushes into one of three territories:

1. Precision + Accuracy Requirements

CNC spindles, high-speed grinding, robotics, measurement equipment. Runout tolerances, cage tolerances, and internal-clearance consistency start to differentiate brands. In this territory, staying with a single premium brand across the machine — often the OEM's original brand — protects the tolerances.

2. 24/7 Continuous Operation

Mining, food processing, chemical plants. When a machine is running 24 hours a day, 7 days a week, small quality gaps in cage material, lubricant retention, and heat treatment compound fast. A workshop-grade bearing that lasts 2 years in intermittent duty may last 3 months in continuous 24/7 service — and the downtime cost of a failure at 3am on a Sunday is not the same as replacing a bearing on a service Monday.

3. Harsh Environmental Conditions

Elevated temperatures, corrosive atmospheres, wash-down environments, high-vibration installations. Premium brands specify their seal materials, lubricant compatibility, and internal clearances for these environments explicitly. Workshop-grade specifications assume general workshop conditions — outside that envelope, the brand matters.

If your application sits inside general workshop conditions, brand is not the biggest lever. The bigger levers are: correct size, correct seal type, correct internal clearance, correct installation, and adequate lubrication. Get those right and a Tier-1 Japanese bearing runs cleanly. Get them wrong and even a European premium brand fails early.

The "All Bearings Are The Same" Myth

The single most common misunderstanding at the AIMS counter: "they all have the same part number, they must be the same bearing."

They don't. The ISO/ABMA part number system (6205, 6206, 22220, and so on) is a size and family reference — it tells you the bore diameter, outer diameter, width, and geometry family. It does NOT tell you anything about:

Cage material (steel, brass, polyamide, phenolic)
Cage design (pressed, machined, riveted)
Heat treatment of the rings and rolling elements
Internal clearance beyond the standard suffix (C2, standard, C3, C4)
Lubrication fill (grease type, fill percentage, retention capability)
Seal material and contact pressure
Surface finish tolerances on the raceways
Whether the "stainless" label is genuine stainless or a normal-steel bearing with stainless-look plating

A 6205 from a Tier-1 Japanese manufacturer and a 6205 from an unbranded factory can look identical, weigh the same, and both fit the housing — and one will run 30,000 hours while the other seizes in 300. The part number is a size label, not a quality guarantee.

The Unbranded / Generic Bearing Warning

Golden AIMS rule: never insult a competitor brand by name. But as a category: unbranded and generic-style bearings should be avoided for any application where a failure has real consequences.

They may carry the correct ISO part number — that's where the compliance stops. What you don't get:

Traceability to a manufacturer who stands behind the product
Warranty support when it fails early
Consistency between batches (this year's shipment may not be the same product as last year's)
Verified material composition when the label says stainless or high-temp
Compliance documentation for food-grade, marine, or export applications

The upfront saving on unbranded bearings disappears the moment you factor in repeat failures, downtime, and the labour cost of removing and replacing the wrong bearing multiple times. AIMS has seen customers save $8 on a bearing and lose $8,000 in downtime three weeks later. Not worth it.

ZZ vs 2RS — Bearing Seal Selection

Same part number can come with different seal configurations. The two most common:

Seal type	Marking	Best for
Metal shield (non-contact)	ZZ or 2Z	Applications where you need freer movement (less rotational drag), lower contamination risk in the environment, or elevated operating temperatures. Metal handles heat better than rubber sealing lips.
Contact seal (rubber)	2RS	The default for most industrial applications. Better contamination protection. Ideal for medium-speed applications in dirtier environments.

Default call: if you're not sure, 2RS is safer for general industrial use. Better contamination barrier, longer service life in dirty environments, minimal speed penalty at typical industrial RPMs. Move to ZZ / 2Z when contamination is low, temperature is elevated, or the speed is high enough that rubber-seal drag matters.

Tapered Roller Bearings — The Two Mistakes Customers Make

Tapered roller bearings are a two-piece assembly — the cone (inner race with rollers and cage) and the cup (outer race). The two pieces are matched at manufacture. AIMS sees the same two mistakes on the counter every month:

Mistake 1: Replacing one part, or mixing brands

Rule: always replace both the cone and the cup together, from the same brand.

Running a new cone against an old cup — or mixing a NACHI cone with an NSK cup — accelerates failure. Different brands can have slightly different contact-angle tolerances. Even where the contact angle looks nominally identical on the drawing, small variations in cup surface profile mean the rollers don't achieve full contact-line coverage. You end up with edge-loading, higher local stress, and premature spalling. The bearing may run for months looking fine, then fail suddenly.

Mistake 2: Under-preload

Rule: set the two races against each other to the correct preload — never assume "hand tight is close enough".

Tapered roller bearings run best under a specified preload — usually a small end-float or a small preload figure specified by the equipment manufacturer. Under-preloaded, the rollers skid instead of rolling cleanly, generating heat and wear. Over-preloaded, the rolling elements are squeezed and the temperature climbs fast. Either way you get early failure — and the failed bearing looks the same at teardown as a wrong-spec bearing, so the underlying cause is often missed and the mistake repeats.

If the equipment manual specifies a preload figure, use it. If it doesn't, ring the AIMS team — the sales team has the reference data across common industrial equipment.

Mining Bearing Spec — Why C3 Internal Clearance Is The Default

Mining maintenance customers almost always specify C3 internal clearance. That's not a nice-to-have — it's the default spec for that operating environment, and here's why.

C3 gives extra internal clearance beyond standard. Mining equipment runs 24/7 at elevated temperatures in hard-to-access locations. Under continuous heavy load, the inner ring heats up faster than the outer ring, expanding the inner ring diameter faster than the outer. Standard-clearance bearings can lose all their internal clearance under this thermal expansion — the rollers get pinched, heat climbs further, and the bearing seizes.

C3 clearance is engineered to absorb this thermal expansion while keeping the rollers free. In mining service, C3 is the difference between a bearing that runs a full maintenance cycle and one that fails in weeks.

Related mining spec content: AIMS Mining Industrial Supplies covers the full mining category — bearings, drives, PPE, lubricants, and safety.

Underground Mining V-Belts — The FRAS Compliance Rule

Not bearings — but critical adjacent knowledge for mining customers, and consistently misunderstood. If you're running V-belts in an underground mining application, the belt must meet FRAS compliance.

FRAS = Fire Resistant, Anti-Static. The mandatory Australian standard for rubber products used underground where flammable gases and coal dust are present. Both properties are safety requirements, not upgrades.

Key facts underground buyers need:

Gates does NOT supply FRAS V-belts. Gates — the industry-leading V-belt brand — is off the table for underground mining applications. This is the single most common misunderstanding.
AIMS sources FRAS-stamped belts from alternative brands where the underground compliance requirement applies.
Critical rule: the belt must be physically stamped FRAS. That physical stamp on the belt is the compliance requirement — a data sheet claim without the stamp doesn't satisfy the standard.
Above-ground mining: not an issue. Standard Gates belts are fine, and Gates Predator is worth promoting for the higher life rating.

Bearing Companions — What You Actually Need Alongside

Every bearing purchase has natural companion products. AIMS keeps these in one conversation so the customer isn't ringing back next week for the piece that should have gone in the first order:

Oil seals — where the bearing arrangement requires seal protection, the oil seal is the natural companion. Ring AIMS for the correct seal spec against your bearing selection.
Bearing sealing washers (Nilos-Ring style) — for extra contamination barrier alongside a standard sealed bearing in dirty environments.
Retaining rings and circlips (Seeger, KRW) — internal or external retaining rings for shaft and housing fixation.
Lubrication — oils and greases matched to the application (temperature, speed, load, food-grade if required). Getting the grease wrong is a bigger cause of early bearing failure than getting the bearing brand wrong.
Bronze bushings + plain bearings — where a rolling-element bearing isn't the right fit (low speed, high load, oscillating motion), a bronze or sintered plain bearing may be. Ring AIMS for the trade-off.
Installation and removal tools — bearing pullers in the right style for the job. Mechanical 2-jaw for accessible bearings, 3-jaw for better grip where clearance allows, hydraulic for medium-to-large bearings, tight spaces, and long shafts where you need to draw the bearing along the shaft length.

When To Ring AIMS vs Buy Online

Straight from Sam Cassar, AIMS Sales Manager: OEMs typically know their exact spec and can order online without needing advice. If you've got the part number and you're replacing like-for-like, the online workflow suits you fine.

Where AIMS earns its keep — and where a phone call saves you real money — is when one of these four triggers applies:

Trigger 1: Urgency

You need it now. You want to know AIMS can deliver from stock, or has a supplier pathway that gets the part to you fast enough. Online timing signals aren't always accurate — a phone confirmation is.

Trigger 2: Brand assurance

You're considering crossing between brands — maybe your usual is out of stock, maybe you want to try an alternative Japanese equivalent. Is it safe to cross? A three-minute conversation with someone who knows the range is worth the time.

Trigger 3: Failure diagnosis

What you've been running isn't working. You need a "what if" conversation before you order the next set of the same-spec bearings that failed. This is where AIMS's 40-year experience pays back many times the cost of the bearing.

Trigger 4: Specific brand or part number you can't find on the site

Maybe your engineering drawing calls for a specific brand, maybe the OEM specified a legacy part number, maybe you can't find the exact spec listed. Ring AIMS — we'll always look at sourcing the specific brand you need, or offer a quality crossover equivalent from the range we distribute. Better to have the conversation than assume we can't help.

The customer who gets the most value from calling is the factory maintenance team — running a crew of fitters, managing parts stock, dealing with real-world failures. That's the customer where AIMS's expertise makes a tangible difference. If that's you, the phone number is (02) 9773 0122 or email sales@aimsindustrial.com.au.

Three Real AIMS Workshop Stories

Story 1: SS6205-2RS + a poultry processing plant

Customer rang asking for a 6205-2RS — a standard sealed deep-groove ball bearing. On the surface, a routine order.

Sam knew the customer was a poultry processing plant. He flagged: for that application, you don't want a standard-steel 6205-2RS. You want SS6205-2RS — the stainless-steel equivalent, food-grade, corrosion-resistant, safe for the wash-down environment poultry processing runs on every shift.

The customer asked for SKF. AIMS doesn't carry SKF, and even where SKF is available its stainless range is limited across the standard sizes. Sam recommended BECO — Italian-manufactured, food-grade stainless, and a brand the customer had used successfully in previous installations. Sam deliberately steered away from a cheap unbranded stainless — the upfront saving disappears the moment repeat failures start.

The lesson: the customer knew the part number. Sam knew the application. That's where the AIMS advice call earns its keep.

Story 2: The fan that kept killing bearings

Customer had a fan application that was suffering continuous bearing failures. They'd been replacing with 2210K/C3 — a self-aligning ball bearing, likely originally specified because it was in stock somewhere cheap, or in a hurry when the machine first went in.

Sam looked at the application load and speed and identified the fan actually needed a 22220K/C3 — a spherical roller bearing, significantly higher load capacity than the self-aligning ball bearing that had been running.

Second finding on the same call: the customer was using a cheap adaptor sleeve to mount the bearing. The sleeve was likely cracking the bearing bore, which — even after the bearing upgrade — would keep causing failures. Sam recommended replacing the adaptor sleeve too.

Two fixes in one call. The bearing swap alone would have masked the root cause. The full diagnosis stopped the failure cycle.

Story 3: Commercial laundry linear bearings + custom shafts

A commercial laundry site needed specific linear bearings for a machine upgrade — plus 20mm hardened shafts with threaded machine ends. Standard off-the-shelf linear bearings any online-only outfit can supply. The custom-machined shafts with threaded ends: only a handful of firms in Australia can arrange that.

AIMS arranged the machining through a supplier partner as part of the same order. Single point of contact, one lead time, one invoice. The customer got the full solution rather than sourcing two components from two channels and coordinating the machining themselves.

The lesson: Australian trade customers value the "we'll sort the whole job" workflow. That's a service moat online-only competitors can't touch.

Frequently Asked Questions

Q: Which bearing brand is the best for Australian industry — NACHI, NSK, Koyo, or NTN?

For everyday industrial applications, the four Japanese Tier-1 brands are largely interchangeable and support each other in the field. NACHI is a leading Japanese manufacturer strong across general industrial + CNC; Koyo (JTEKT) has Toyota Group precision heritage; NSK has deep OEM specification depth; NTN is full-range Japanese with strong specialty coverage. All four are stocked at AIMS. Brand starts to matter when the application pushes into precision, 24/7 continuous operation, or harsh environmental conditions. For general workshop replacement, choose based on availability, price, and OEM match.

Q: Does AIMS stock SKF bearings?

No — SKF isn't currently in the AIMS range. AIMS's deepest bearing range sits across the Japanese Tier-1 houses (NACHI, NSK, Koyo, NTN, FYH, IKO, EZO, IJK), plus specialty brands including Timken, McGill, BECO, Asahi, RBC, Nadella, Durbal, PFI, Rollway and others. The Japanese Tier-1 range matches or exceeds SKF performance in most applications. If you need a specific SKF part for engineering drawings, warranty or legacy reasons, ring AIMS on (02) 9773 0122 — we'll always look at sourcing the exact brand you need, or recommend a quality equivalent.

Q: Can AIMS source a bearing brand that isn't listed on the website?

Very often yes. Ring AIMS with the brand and part number — we'll always look at sourcing the exact bearing you need, or offer a quality crossover equivalent from the range we distribute. Where a specific brand is not sourceable, we'll say so rather than substituting without telling you. Trigger 4 in "When to ring AIMS" (above) covers this specifically.

Q: What does the C3 marking on a bearing mean?

C3 is an internal clearance specification — the bearing has more radial clearance between rollers and races than a standard-clearance bearing. C3 is the default spec for applications with elevated operating temperatures or continuous 24/7 duty, because the extra clearance absorbs thermal expansion of the inner ring under load without pinching the rollers. Mining maintenance almost always specifies C3.

Q: What is the difference between a 2RS and a ZZ bearing?

The suffix describes the seal type. 2RS is a contact rubber seal — the default for most industrial applications, better contamination protection, ideal for medium-speed dirtier environments. ZZ (also 2Z) is a non-contact metal shield — chosen where you need freer movement, low contamination risk, or elevated operating temperatures (metal shields handle heat better than rubber contact seals).

Q: Can I mix brands when replacing a tapered roller bearing?

No. Tapered roller bearings are a two-piece assembly — cone (inner race) and cup (outer race). Always replace both, and always from the same brand. Different brands can have small contact-angle tolerance differences that prevent full rolling-contact coverage, leading to edge-loading and premature failure. Mixed-brand tapered roller assemblies may run for months looking fine then fail suddenly.

Q: Are unbranded bearings safe to use?

They carry the correct ISO part number — that's where the compliance stops. AIMS does not recommend unbranded / generic bearings for any application where a failure has real safety, downtime, or hygiene consequences. Real risk examples include bearings labelled as stainless that aren't actually stainless (normal-steel with a plated finish), cage disintegration under load, and inconsistent quality between batches. The upfront saving disappears fast under repeat-failure downtime cost.

Q: Does Gates supply FRAS-compliant V-belts for underground mining?

No. Gates does NOT supply FRAS V-belts. FRAS (Fire Resistant, Anti-Static) is the mandatory Australian standard for rubber products used underground, and Gates is off the table for underground mining applications. AIMS sources FRAS-stamped belts from alternative brands where the underground compliance requirement applies. The belt must be physically stamped FRAS — a data sheet claim without the stamp doesn't satisfy the standard. Above-ground mining is fine with standard Gates belts, and Gates Predator is worth considering for the higher life rating.

Q: What is the difference between NACHI and NSK?

Both are Tier-1 Japanese quality across their standard ranges. NACHI is a leading Japanese manufacturer strong across general industrial and CNC machinery — founded 1928 in Toyama, Japan. NSK is Japan's first ball bearing manufacturer (founded Tokyo 1916), with deep OEM specification depth and numerous brands under its banner. For everyday industrial replacement, they are broadly interchangeable. Choose NACHI where the application is general industrial or CNC-adjacent; choose NSK where the OEM specified NSK from the factory or where NSK is more readily available in the specific size and specification you need.

Q: When should I use a workshop-grade bearing brand like IJK?

IJK (founded 1944) is properly engineered Japanese bearings at a workshop-grade price point. Fit for general workshop applications where a premium bearing isn't warranted — hand tools, low-duty fans, non-critical drive assemblies. It should not be used in precision spindles, 24/7 mining or process equipment, food-grade applications requiring genuine stainless, or anywhere a bearing failure has real safety or downtime consequences. Match the bearing tier to the application tier — the AIMS sales team can help with a phone consultation.

Q: What bearings does AIMS carry stock across?

AIMS carries the 6200-6210 range of ball bearings (the most common general-purpose sizes) plus a broad selection of needle roller bearings across most sizes. Additional coverage in spherical roller, tapered roller, angular contact, thrust, stainless, and miniature ranges. Japanese Tier-1 brands in the range include NACHI, Koyo, NSK, NTN, FYH, IKO, EZO plus IJK workshop-grade, and specialty brands including Timken, McGill, BECO, Asahi, RBC, Durbal, Nadella, PFI and others distributed as applications demand.

Q: What is the correct preload for a tapered roller bearing?

Preload depends on the equipment. If the equipment manual specifies a preload figure, use it. If it doesn't, ring the AIMS Sales team — they have reference data across common industrial equipment. Under-preload causes roller skidding, heat, and wear. Over-preload squeezes the rolling elements, drives temperature up, and causes early failure. Getting preload wrong is one of the two most common tapered roller mistakes AIMS sees (the other being mixing brands or replacing only one part of the two-piece assembly).

Related AIMS Bearing Resources

Ring AIMS for the Bearing Call You're Not Sure About

Every bearing question at AIMS gets a real answer from a real person with 40+ years across the trade. If you're unsure whether to cross a brand, whether C3 is the right clearance for your application, whether you need 2RS or ZZ, or whether the bearing you've been buying is actually the right spec for the job — that's a three-minute phone call that can save you the next failure.

Phone: (02) 9773 0122 · Mon-Fri 08:00-17:00 AEST
Email: sales@aimsindustrial.com.au
Warehouse: 108 Ashford Ave, Milperra NSW 2214
Business: Fully Chic Pty Ltd t/as AIMS Industrial Supplies — ABN 85 152 943 596 · Australian owned + operated since 1988.