Buy Thrust Bearings Online in Australia
Thrust bearings handle axial loads running along the shaft — not radial. Selection turns on load type (light positional vs heavy continuous), space constraints and rotation speed. Wrong selection ends in bearing failure, shaft scoring or housing damage. AIMS Industrial stocks thrust ball, thrust roller and thrust needle roller bearings across NSK, NACHI, Koyo, IKO and FYH — plus the lock nuts, tab washers and shaft / housing washers that go with them. Bore range from 10 mm through 200 mm covered ex-stock; larger sizes on indent.
Thrust Bearing Selection — Quick Reference
Thrust bearings carry AXIAL loads (along the shaft) — not radial. Selection turns on load type (light positional vs heavy continuous), space constraints, and rotation speed. Wrong selection = bearing failure, shaft scoring, or housing damage.
| Thrust Bearing Type | Best For | Load Capacity |
|---|---|---|
| Thrust Needle Roller (AXK + Washers) | Compact axial load, automatic transmissions, clutch packs | Moderate – high (high P/V ratio) |
| NTB Series (NSK/Koyo) | Compact assemblies, gearboxes, pumps, compressors | Moderate – high |
| Cage & Roller Only (NTA) | Custom stack height, replacing rolling element only | Per assembly — match washers |
| Polymer Cage (AXK.TN) | High-speed applications, weight-sensitive assemblies | High-speed rated |
| Shaft Washer (WS) | Inner running surface — replace when scored | Per bearing pair |
| Housing Washer (GS) | Outer mounting surface — replace when scored | Per bearing pair |
| Thrust Ball Bearing (51100 Series) | Light axial positioning, lazy susans, low-load shafts | Light only — no shock load |
| Spherical Thrust Roller | Heavy axial + some misalignment — cranes, large shafts | Heavy — handles misalignment |
| Cylindrical Thrust Roller | Heavy continuous axial — heavy machinery | Highest axial capacity |
Critical: Thrust needle bearings need flat, hardened washers (Rc 58+ HRc) — soft washers wear and fail. Always replace washers as a set with the bearing. Brands: IKO, Koyo. Companion: needle roller bearings, bearings, thrust bearing guide, bearing maintenance guide.
Thrust Bearings — Ball, Roller and Needle
Thrust needle roller bearings and thrust washers handle axial loads in compact assemblies where standard thrust ball or roller bearings would be too large. AIMS Industrial stocks a comprehensive selection of thrust needle roller components from IKO and Koyo, including complete assemblies, cage and roller sets, and individual shaft and housing washers.
Complete Thrust Needle Roller Bearings
Full-assembly thrust needle roller bearings — AXK and NTB series — consist of a cage-and-roller assembly sandwiched between a shaft washer (WS) and a housing washer (GS). Available in metric dimensions covering a wide bore range, these bearings suit applications such as automatic transmissions, clutch mechanisms, pumps and compressors.
Cage & Roller Assemblies
Cage and roller assemblies (NTA series) can be combined with separately sourced washers where the application requires a custom stack height or where replacing only the rolling element is practical. Polymer cage variants (AXK.TN) reduce weight and inertia in high-speed applications.
Shaft & Housing Washers
Shaft washers (WS inner ring) and housing washers (GS outer ring) are stocked individually for replacement applications and for building custom thrust bearing stacks. Also available: flat-back single-direction thrust ball bearings (51100 series) for lower-load axial positioning applications.
Lock Nuts & Tab Washers
Bearing lock nuts (KM series) and tab washers (MB series) lock the thrust bearing assembly to the shaft and prevent it backing off under reversing axial load. We stock lock nuts and matching tab washers across the standard metric and imperial shaft sizes that pair with our thrust bearing range. Specify by shaft thread (e.g. KM10 / MB10 for an M50×1.5 shaft thread) — call us with the bearing part number if you need the matched lock nut and washer set.
Related: Needle Roller Bearings | Ball Bearings | All Bearings
Australian industries that drive thrust bearing demand
Thrust bearings carry the axial loads that ordinary radial bearings can't — and every Australian industry running rotating equipment with thrust loading is a thrust bearing buyer. The segments are heavy industrial pump and compressor manufacture and repair (centrifugal pump shaft thrust, vertical turbine pumps, screw compressors — typically thrust ball or cylindrical thrust roller bearings 51100 series up to 100 mm bore), gearbox manufacturers and rebuilders (helical and bevel gear axial loads — spherical thrust roller bearings for misalignment tolerance), automatic transmission and clutch assembly (thrust needle roller bearings AXK series — compact axial load packages with bearing washers), mining and resources MRO (heavy crusher and mill thrust loads, dragline component thrust bearings — spherical thrust roller for shock and misalignment tolerance), agricultural machinery (PTO drives, header gearboxes, baler drives — typically thrust ball bearings in the 51200 to 51400 series), and food and beverage processing (sanitary pumps and mixers — stainless variants of the standard thrust bearing range).
Decision factors are load direction (axial only, or combined axial plus radial), load magnitude (light positioning vs heavy continuous), speed (high-speed limited by ball bearing surface velocity; thrust roller suits higher loads at lower speed), space envelope (thrust needle bearings give the smallest axial section), misalignment tolerance (spherical thrust roller accommodates significant shaft-housing misalignment; thrust ball and cylindrical thrust roller require precise alignment), and shaft hardness (thrust needle bearings need hardened washers above Rockwell C 58 — soft shafts wear and fail the bearing).
Australian standards and bearing specification
Bearing dimensions and tolerances are governed by international standards adopted across Australia. ISO 104 (Rolling Bearings — Thrust Bearings) covers thrust bearing boundary dimensions and is the dimensional reference used by NSK, NACHI, Koyo, FYH and IKO in their thrust bearing catalogues. ISO 199 covers tolerances for thrust bearings (the P0, P6, P5 precision class system). ISO 5753 covers bearing internal clearance. The Australian Bearing Manufacturers' specifications (where applicable) reference these ISO standards directly. For shaft and housing fits, AS 1654 (Tolerances and Limits) and ISO 286 are the dimensional reference for the shaft tolerance class (typically k5, m5 or n6 for rotating-inner-ring service) and housing tolerance class (typically H7 or J7 for rotating-outer-ring service).
For thrust needle roller bearings, the shaft and housing washer surfaces must be hardened above Rockwell C 58 for the bearing to perform at its rated load capacity. Soft washers wear under the roller contact stress, the bearing loses its hardened raceway, and the assembly fails. This is the single most common failure mode for thrust needle bearings in field service — soft replacement washers fitted by maintenance teams who didn't realise the hardness requirement.
Brand depth — NSK, NACHI, Koyo, IKO and FYH at AIMS
AIMS Industrial supplies thrust bearings from the established premium bearing brands with full Australian distribution and parts availability. NSK covers the standard thrust ball range (51100 to 51400 series) and the spherical thrust roller range for heavy industrial applications. NACHI provides the standard thrust ball range and clearance-variant options. Koyo is the strongest brand for thrust needle bearings (AXK series, NTB series, polymer-cage variants for high-speed) and supplies the matching WS and GS washers. IKO is the specialist brand for thrust needle bearings and cage-and-roller-only assemblies (NTA series) for applications requiring custom stack height. FYH covers the inch-series thrust bearing range. Bore range from 10 mm through 200 mm covered ex-stock; larger sizes available on indent typically within 1-2 weeks.
Cross-link to companion AIMS bearing collections
The thrust bearing specification connects to the broader AIMS bearing and power-transmission ecosystem. Companion ranges: bearings for the full bearing category; needle roller bearings for the radial needle range that pairs with thrust needle bearings on compact assemblies; deep groove ball bearings for the radial-only side; cam followers for the track-roller specialty; bearing pullers for the extraction tool side; lubrication for the grease side; thrust bearing guide for selection background; bearing maintenance guide for the inspection-and-replacement side; and needle roller bearing guide for the needle-bearing cross-link.
Thrust bearing selection questions
How do I tell axial load from radial load on a bearing application?
Radial load acts perpendicular to the shaft (the bearing carries the weight of the shaft and components); axial load acts along the shaft axis (typically caused by gear thrust, fluid pressure, or shaft thrust). A deep groove ball bearing carries radial load primarily with limited axial capacity; an angular contact bearing carries combined radial and axial load; a thrust bearing carries axial load only. If the bearing application has significant axial load and limited radial load, specify a dedicated thrust bearing — fitting a deep groove bearing on a thrust-dominated application is a common cause of early bearing failure.
When do I specify spherical thrust roller bearings instead of cylindrical thrust roller?
Specify spherical thrust roller bearings when the application has shaft-to-housing misalignment (typically above 0.5° static misalignment), shock loading, or large structural deflections under load (cranes, draglines, large machinery). The spherical raceway accommodates the misalignment without edge-loading the rollers. Cylindrical thrust roller bearings are for precisely-aligned heavy-load applications — they give the highest axial capacity in a given size envelope but require precise mounting.
Why do thrust needle bearings need hardened washers?
The needle rollers in a thrust needle bearing run directly on the shaft and housing washers — those washers ARE the bearing raceway. Soft washers wear under the roller contact stress and the bearing loses its hardened raceway. The required hardness is typically Rockwell C 58 to Rockwell C 63 — equivalent to a properly heat-treated bearing steel. Always specify the matching WS (shaft) and GS (housing) washers as a set with the bearing — never re-use old washers or fit a thrust needle bearing onto an un-hardened shaft.
What's the difference between an AXK and an NTB bearing?
AXK is the standard thrust needle roller bearing with metal cage — covers most general industrial applications. NTB is the heavy-duty variant with full-complement rollers (no cage, more rollers, higher load capacity at lower speed). For high-speed applications specify the polymer-cage variant (AXK.TN) which gives higher rotational speed than the metal cage. NTB is for low-speed, high-load applications; AXK is the general workshop default.
Can I use a thrust ball bearing on a continuous-load application?
Generally no. Thrust ball bearings (51100 to 51400 series) are designed for light axial positioning loads — lazy susans, low-load shaft thrust, light gearbox positioning. For continuous heavy axial load, specify a cylindrical thrust roller or spherical thrust roller bearing with significantly higher dynamic load capacity. Running a thrust ball bearing in a thrust roller application leads to early ball pitting and brinelling failure within hours of full-load service.
How do I match the bore to my shaft size?
The bearing bore designation matches the shaft diameter directly for metric sizing (e.g. 51106 has a 30 mm bore for a 30 mm shaft). Check the shaft tolerance class — for rotating-inner-ring service the shaft should be in the k5 or m5 tolerance band (light interference fit) per ISO 286. For stationary-inner-ring service a transition or sliding fit is acceptable. The catalogue specifies the recommended shaft and housing fit class for each bearing series; follow the catalogue rather than fitting bearings to whatever shaft tolerance happens to be on the part.
For thrust bearing selection across the NSK, NACHI, Koyo, IKO and FYH ranges, washer matching, or bore-size availability ex-stock and on indent, contact our team.
People Also Ask — Thrust Bearings and Washers
Q: What's the difference between a thrust bearing and a radial bearing?
Thrust bearings are designed to handle axial load — force along the shaft axis. Radial bearings (deep groove, taper roller in radial configuration) handle force perpendicular to the shaft. Thrust bearings come in ball thrust and roller thrust configurations, and most cannot tolerate any significant radial load. If both axial and radial load are present, you need either a tapered roller bearing or a combination of separate thrust and radial bearings.
Q: How do thrust washers differ from thrust bearings?
Thrust washers are typically plain bronze or steel sliding washers that handle low loads and low speeds — common in small assemblies and as cheap thrust take-up. Thrust bearings use rolling elements (balls or rollers) to handle higher loads and speeds with much lower friction. Don't substitute a thrust washer where a thrust bearing was specified — the friction increase will overheat and seize the assembly.
Q: Which thrust bearing direction matters in assembly?
Most thrust bearings are uni-directional — they handle axial load in one direction only. The shaft washer (with smaller bore) goes against the rotating shaft, the housing washer (larger bore) goes against the stationary housing. Double-acting thrust bearings handle load in both directions but cost more and need correct shoulder design. Reversing the washers causes immediate failure under load.
Q: Can thrust bearings be lubricated with the same grease as radial bearings?
Usually yes — most general-purpose industrial bearing greases are designed for both applications. The exception is high-speed thrust applications where a lighter grease or oil bath is needed to prevent churning losses. For low-speed heavy-load thrust bearings, an EP (extreme pressure) grease handles the contact stresses better than a general-purpose grease.
Q: What causes a thrust bearing to fail prematurely?
Common causes: misalignment of the shaft and housing washers (forces the rolling elements to skew), wrong direction of load (uni-directional bearings under reverse load), inadequate lubrication, contamination from particles, or overload beyond the rated capacity. Visible signs of failure: brinell marks on the washer races, smearing or pitting of rolling elements, increased running noise. Replace as a complete bearing set, not individual components.