89320-M bearing: complete specifications & equivalents
The 89320-M is a ISO 104 radial bearing sized 100 x 170 x 42 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 100 mm |
| Outer diameter D | 170 mm |
| Width B | 42 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 300 kN |
| Basic static load rating C0 | 1370 kN |
| Fatigue load limit Pu | 132 kN |
| Reference speed (thermal) | 950 rpm |
| Limiting speed (mechanical) | 1900 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 4550 g |
| Manufacturer designation | 89320 M |
| 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 | 3.937 in |
|---|---|
| Outer diameter D | 6.693 in |
| Width B | 1.654 in |
| ISO bore code | 20 |
| Radial section height (D−d)/2 | 35 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) | 6 of 8 |
| Bore above smallest 89300-series size | 60 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 89320-M model number is decoded
Where a thrust ball bearing of the same envelope is exhausted, 89320 M replaces the ball complement with cylindrical rollers: 100 mm bore, 170 mm OD, rated 1370 kN static for steady hook and screw loads. In 89320 M, 893 fixes the 170 mm OD and 42 mm height; 20 selects the 100 mm seat, and the machined brass M 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 300 kN rating assumes oil or grease reaching the full washer face. Minimum axial load is explicit at factor A 0.15: below F_am = A·n² (or the catalogue's slow-speed floor) the cylindrical rollers skid; springs or the rotor's own weight are part of the selection, not an accessory. 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 0.15) is present without clamping the rollers.
Typical equipment & failure modes
Common applications
- vertical electric motor and pump shafts whose rotor weight loads one bearing
- 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
Known failure patterns
- cage wear from rollers being dragged through unloaded zones under fluctuating thrust
- shaft-washer creep and fretting corrosion on a soft or undersized shaft shoulder
- abrasive paste forming as dust bypasses the housing seals into the open washer set
- electrical erosion of raceways on VFD-driven shafts without grounding or insulation
- roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)
Selection pitfalls — read before you substitute
- At 100 mm bore the minimum load (A 0.15) 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 950 r/min reference speed is the thermal criterion under load, the 1,900 r/min limiting speed is mechanical and oil lubrication typically raises the usable figure.
- The 300/1370 kN ratings assume flat, full-support washer seats; a housing face narrower than the 170 mm washer OD invalidates the rating through edge stress.
- Factor A 0.15 is a mounting requirement, not advice: below the minimum axial load the rollers skid at speed — most "mysterious" early thrust failures are unloaded running.
- Do not substitute a thrust ball bearing of the same ISO envelope by rating alone: the cylindrical rollers of 89320 M need different minimum load and lubrication despite the shared 100×170 mm outline.
- The 300/1370 kN ratings and 4550 g mass are SKF catalogue values transcribed from ch. 11.1 of PUB BU/P1 17000 (PDF table page 892); 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
Why does 89320 M need a minimum axial load?
Below factor A 0.15 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 89320 M 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.
How should a 89320 M be mounted?
Interference fit for the shaft washer, sliding fit for the housing washer, full-area square shoulders both sides, press on washer backs only, and shim the cover so the rollers turn freely while the factor-A 0.15 minimum load is present.
What are the dimensions and ratings of the 89320 M?
A 89320 M measures 100 mm bore × 170 mm outside diameter × 42 mm width (3.937 × 6.693 × 1.654 in). From SKF catalogue PUB BU/P1 17000: dynamic C 300 kN, static C0 1370 kN, fatigue limit Pu 132 kN, reference speed 950 r/min, limiting speed 1,900 r/min, mass about 4550 g. Raceway diameters Ea 109 mm / Eb 166 mm and minimum load factor A 0.15 guide the seat design.
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.