K37X42X17 bearing: complete specifications & equivalents
The K37X42X17 is a DIN 5402 radial bearing sized 37 x 42 x 17 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 37 mm |
| Outer diameter D | 42 mm |
| Width B | 17 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | none |
| Basic dynamic load rating C | 21.6 kN |
| Basic static load rating C0 | 43 kN |
| Fatigue load limit Pu | 5.2 kN |
| Reference speed (thermal) | 11000 rpm |
| Limiting speed (mechanical) | 13000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 22 g |
| Manufacturer designation | K 37x42x17 |
| Standard | DIN 5402 |
| Catalog version | SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.1 needle roller and cage assemblies |
| Last verified | 2026-09-26 |
Source: catalog reference (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.1 needle roller and cage assemblies) · extracted 2026-09-26
Parameters extracted from the official SKF Rolling Bearings catalogue (SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.1 needle roller and cage assemblies); 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 & K-series range
| Bore d | 1.457 in |
|---|---|
| Outer diameter D | 1.654 in |
| Width B | 0.669 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 2.5 mm |
| Smallest bore in K-series | 3 mm |
| Largest outer diameter in K-series | 63 mm |
| Width range across K-series | 7–32 mm |
| Bore position in K-series (smallest first) | 14 of 22 |
| Bore above smallest K-series size | 34 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the K37X42X17 model number is decoded
SKF lists K 37x42x17 in the K series of needle roller and cage assemblies: needle rollers caged at 37×42×17 mm, designed to run directly on a ground, hardened shaft and inside a machined housing bore. In the K code K 37x42x17, Fw×E×B reads directly as journal 37 mm, complement diameter 42 mm and cage width 17 mm; the housing bore is ground to E with H6/H7 tolerance to complete the outer raceway. No suffix on the order number means the standard single-row assembly; the polymer TN cage version is the usual choice for grease-lubricated pivots where noise matters. For life calculation, the 21.6/43 kN ratings assume raceway geometry supplied by the shaft and housing in families without an inner ring — journal hardness, roundness and finish are part of the bearing, not of the application. Lubrication reaches both raceways through the open cage windows; grease the bore and journal before assembly, since after fitting the 17 mm narrow cage cannot be relubricated through a closed housing.
Typical equipment & failure modes
Common applications
- hinge and pivot joints in printing and textile machinery
- universal joint crosses on commercial vehicles
- planetary gear pins in compact transmissions
- connecting rods of small compressors where radial height is critical
Known failure patterns
- raceway spalling once the catalogue L10 life is exceeded or after overload events
- polymer cage deformation when the local temperature exceeds the 120 °C sustained limit
- abrasive paste formation from dust ingressing past open ends without effective housing seals
- hard-particle indentation in unfiltered lubricant
- rapid raceway scoring when the shaft journal hardness drops below 58 HRC or the ground finish wears away
Selection pitfalls — read before you substitute
- At 37 mm bore, verify shaft deflection against the needle length: these rollers tolerate little edge loading, and a simply supported span between 37 mm seats can bend past the compensation range long before the load rating is exhausted.
- Oscillating pivots fail differently: rocking through a small angle concentrates wear in the same roller positions — inspect those zones, and consider rotating the assembly's clock position at service intervals.
- Contamination, not fatigue, kills most small needle bearings: with raceways this narrow, one hard particle dents a full-width line — seal the housing even when the bearing execution itself is open.
- The 21.6/43 kN ratings and 22 g mass are SKF catalogue values transcribed from ch. 7.1 of PUB BU/P1 17000 (PDF table page 618); combined-type axial ratings appear in the text above because the structured record carries radial values only.
Frequently asked questions
How should the K 37x42x17 be mounted?
Slide the assembly over the ground 37 mm journal with a mounting sleeve, bore the housing to E 42 mm, and retain with a washer spanning the cage. Never press against the cage or rotate before the bearing is lubricated and loaded.
What limits the service life of a K 37x42x17?
Beyond the L10 rating, the practical limits are journal/raceway hardness for the 37 mm seat, lubricant condition at the roller ends, and contamination through open ends — the 2.5 mm radial section leaves no reserve once a raceway is dented or ribboned.
What are the dimensions and ratings of the K 37x42x17?
A K 37x42x17 measures 37 mm bore/Fw × 42 mm outside diameter × 17 mm width (1.457 × 1.654 × 0.669 in). From SKF catalogue PUB BU/P1 17000: radial dynamic rating C 21.6 kN, static C0 43 kN, fatigue limit Pu 5.2 kN, limiting speed 13,000 r/min, reference speed 11,000 r/min, mass about 22 g.
How is the K 37x42x17 designation read?
K = needle roller and cage assembly (DIN 5402); the three figures give Fw 37 mm (shaft journal), E 42 mm (complement outside diameter, matched by the housing bore) and B 17 mm width. TN marks the glass fibre reinforced PA66 cage.
Reviewed & verified by the MPN Base engineering desk against source catalog SKF PUB BU/P1 17000/1 EN (Oct 2018), ch. 7.1 needle roller and cage assemblies on 2026-09-26. Read our editorial & correction policy.