89436-M bearing: complete specifications & equivalents
The 89436-M is a ISO 104 radial bearing sized 180 x 360 x 109 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 180 mm |
| Outer diameter D | 360 mm |
| Width B | 109 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | brass |
| Basic dynamic load rating C | 1760 kN |
| Basic static load rating C0 | 8000 kN |
| Fatigue load limit Pu | 655 kN |
| Reference speed (thermal) | 400 rpm |
| Limiting speed (mechanical) | 800 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 60000 g |
| Manufacturer designation | 89436 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 & 89400-series range
| Bore d | 7.087 in |
|---|---|
| Outer diameter D | 14.173 in |
| Width B | 4.291 in |
| ISO bore code | 36 |
| Radial section height (D−d)/2 | 90 mm |
| Smallest bore in 89400-series | 80 mm |
| Largest outer diameter in 89400-series | 420 mm |
| Width range across 89400-series | 54–122 mm |
| Bore position in 89400-series (smallest first) | 4 of 7 |
| Bore above smallest 89400-series size | 100 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the 89436-M model number is decoded
The extra-heavy 894 series bearing 89436 M carries pure axial load at low to moderate speed: 1760 kN dynamic and 8000 kN static across a 180×360 mm washer pair, 109 mm overall height. In 89436 M, 894 fixes the 360 mm OD and 109 mm height; 36 selects the 180 mm seat, and the machined brass M cage is the only execution suffix on these rigid-washer bearings. The three components are separable and interchangeable within the size: WS shaft washer, K-cage roller set, GS housing washer, all running on flat, square seats; the machined brass M cage is standard for this size. Static safety matters for shock duty: compare peak axial force against C0 8000 kN with the application's static factor, since crane hooks and screw positions see their worst load at zero or low speed. In vertical shafts let the rotor weight provide the minimum load where possible; otherwise fit a spring pack above the housing washer, and verify the washer face is flooded with oil at first start.
Typical equipment & failure modes
Common applications
- 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
- screw jack and lifting screw thrust positions under slow, steady load
Known failure patterns
- roller skidding and raceway glazing once the thrust falls below the catalogue minimum axial load (factor A)
- housing-washer rotation scored into an unmachined or loose seating face
- oil starvation at the sliding contact zones of large spherical roller thrust bearings on forced-feed trips
- false brinelling and rust-red witness marks on standby machines under external vibration
- smearing at roller-raceway contacts during unloaded startup before the oil film or preload is established
Selection pitfalls — read before you substitute
- At 180 mm bore the washers are too stiff to conform to a non-square seat: machine the shoulders parallel or the roller ends concentrate load into a narrow stripe across 109 mm.
- Do not substitute a thrust ball bearing of the same ISO envelope by rating alone: the cylindrical rollers of 89436 M need different minimum load and lubrication despite the shared 180×360 mm outline.
- The separable washers are not interchangeable across series: an 811 and an 812 washer for the same bore differ in OD and height — order WS/GS parts by the full 89436 M size.
- the 400 r/min reference speed is the thermal criterion under load, the 800 r/min limiting speed is mechanical and oil lubrication typically raises the usable figure.
- The 1760/8000 kN ratings assume flat, full-support washer seats; a housing face narrower than the 360 mm washer OD invalidates the rating through edge stress.
- The 1760/8000 kN ratings and 60000 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
How should a 89436 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 5.1 minimum load is present.
What are the dimensions and ratings of the 89436 M?
A 89436 M measures 180 mm bore × 360 mm outside diameter × 109 mm width (7.087 × 14.173 × 4.291 in). From SKF catalogue PUB BU/P1 17000: dynamic C 1760 kN, static C0 8000 kN, fatigue limit Pu 655 kN, reference speed 400 r/min, limiting speed 800 r/min, mass about 60000 g. Raceway diameters Ea 200 mm / Eb 351 mm and minimum load factor A 5.1 guide the seat design.
How is the 89436 M designation read?
The first three digits 894 give the dimension series (extra-heavy 894 series); 36 encodes the 180 mm bore (code 36 × 5); the suffix denotes the machined brass M cage. WS and GS washers of the same size can be ordered separately.
Why does 89436 M need a minimum axial load?
Below factor A 5.1 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.
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.