89312-TN bearing: complete specifications & equivalents
The 89312-TN is a ISO 104 radial bearing sized 60 x 110 x 30 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 60 mm |
| Outer diameter D | 110 mm |
| Width B | 30 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 153 kN |
| Basic static load rating C0 | 640 kN |
| Fatigue load limit Pu | 65.5 kN |
| Reference speed (thermal) | 1400 rpm |
| Limiting speed (mechanical) | 2800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 1250 g |
| Manufacturer designation | 89312 TN |
| Standard | ISO 104 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 11.1 cylindrical roller thrust bearings |
| Last verified | 2026-09-27 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 11.1 cylindrical roller thrust bearings) · extracted 2026-09-27
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 11.1 cylindrical roller thrust bearings); SKF® and SKF Explorer® are trademarks of AB SKF, used here for identification only — mpnbase is not an authorized SKF distributor. Boundary dimensions are ISO 15 interchangeable; current production values may differ, verify at skf.com.
Dimensions in inches & 89300-series range
| Bore d | 2.362 in |
|---|---|
| Outer diameter D | 4.331 in |
| Width B | 1.181 in |
| ISO bore code | 12 |
| Radial section height (D−d)/2 | 25 mm |
| Smallest bore in 89300-series | 40 mm |
| Largest outer diameter in 89300-series | 210 mm |
| Width range across 89300-series | 22–54 mm |
| Bore position in 89300-series (smallest first) | 2 of 8 |
| Bore above smallest 89300-series size | 20 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 89312-TN model number is decoded
89312 TN is a single-direction cylindrical roller thrust bearing to ISO 104 in the heavy 893 series: a flat shaft washer, a roller-and-cage set and a housing washer stacked to 60×110×30 mm, listed in SKF catalogue PUB BU/P1 17000 ch. 11.1. In 89312 TN, 893 fixes the 110 mm OD and 30 mm height; 12 selects the 60 mm seat, and the glass fibre reinforced PA66 TN cage is the only execution suffix on these rigid-washer bearings. Small sizes ship with machined brass M cages to guide heavy rollers at the lubricant limit; the 153 kN rating assumes oil or grease reaching the full washer face. The 1250 g mass and 30 mm axial height sit between 60 and 110 mm washer diameters; check the seat shoulder spans the full ring face — a narrow shoulder causes washer fretting long before fatigue does. Press only on washer backs, never through the roller set; seat both washers against full-area square shoulders, and shim the housing cover so the minimum load (A 0.033) is present without clamping the rollers.
Typical equipment & failure modes
Common applications
- extruder and injection press screw thrust blocks at low speed
- rolling-mill screwdown mechanisms and press adjusters
- slewing and turntable pivots with predominantly axial force
- crane hook crossheads carrying pure hook thrust while the hook swivels
Known failure patterns
- cage wear from rollers being dragged through unloaded zones under fluctuating thrust
- housing-washer rotation scored into an unmachined or loose seating face
- grease churning and overheating when a high-speed thrust position is over-packed
- brinelling of washer raceways from impact or mounting force applied through the rolling elements
- roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)
Selection pitfalls — read before you substitute
- At 60 mm bore the minimum load (A 0.033) is still small, but a vertical shaft at rest loses it entirely — specify springs or check the rotor weight exceeds F_am at zero speed.
- the 1,400 r/min reference speed is the thermal criterion under load, the 2,800 r/min limiting speed is mechanical and oil lubrication typically raises the usable figure.
- The 153/640 kN ratings assume flat, full-support washer seats; a housing face narrower than the 110 mm washer OD invalidates the rating through edge stress.
- Factor A 0.033 is a mounting requirement, not advice: below the minimum axial load the rollers skid at speed — most "mysterious" early thrust failures are unloaded running.
- Keep the glass fibre reinforced PA66 TN cage out of chemical contact with aggressive EP additives beyond its compatibility list; cage damage here redistributes rollers and destroys the washer in hours.
- The 153/640 kN ratings and 1250 g mass are SKF catalogue values transcribed from ch. 11.1 of PUB BU/P1 17000 (PDF table page 890); mounting data — Ea/Eb raceway diameters and the minimum load factor A — appears in the running text because the structured record carries the boundary envelope only.
Frequently asked questions
What are the dimensions and ratings of the 89312 TN?
A 89312 TN measures 60 mm bore × 110 mm outside diameter × 30 mm width (2.362 × 4.331 × 1.181 in). From SKF catalogue PUB BU/P1 17000: dynamic C 153 kN, static C0 640 kN, fatigue limit Pu 65.5 kN, reference speed 1,400 r/min, limiting speed 2,800 r/min, mass about 1250 g. Raceway diameters Ea 66 mm / Eb 108 mm and minimum load factor A 0.033 guide the seat design.
How is the 89312 TN designation read?
The first three digits 893 give the dimension series (heavy 893 series); 12 encodes the 60 mm bore (code 12 × 5); the suffix denotes the glass fibre reinforced PA66 TN cage. WS and GS washers of the same size can be ordered separately.
Why does 89312 TN need a minimum axial load?
Below factor A 0.033 the cylindrical rollers skid instead of rolling, glazing and smearing the washer tracks. Springs, preload shims or rotor weight must keep the thrust above the catalogue minimum, especially during unloaded starts.
Can the 89312 TN take reversing thrust?
No. It carries axial load in one direction only; reversing force unloads and impacts the roller set. Use a mirrored pair of bearings for reversing shafts, with a separate arrangement for radial load.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 11.1 cylindrical roller thrust bearings on 2026-09-27. Read our editorial & correction policy.