K7X10X8-TN bearing: complete specifications & equivalents
The K7X10X8-TN is a DIN 5402 radial bearing sized 7 x 10 x 8 mm (bore x OD x width). Verify dimensions against the official catalog before ordering.
Specification table
| Parameter | Value |
|---|---|
| Brand | SKF |
| Bore diameter d | 7 mm |
| Outer diameter D | 10 mm |
| Width B | 8 mm |
| Material | GCr15 |
| Seal / shield | open |
| Internal clearance | CN |
| Tolerance class | P0 |
| Cage | polymer (PA66 glass-fibre reinforced) |
| Basic dynamic load rating C | 2.81 kN |
| Basic static load rating C0 | 2.75 kN |
| Fatigue load limit Pu | 0.29 kN |
| Reference speed (thermal) | 32000 rpm |
| Limiting speed (mechanical) | 36000 rpm |
| Operating temperature | -40 to +120 °C |
| Mass | 0.9 g |
| Manufacturer designation | K 7x10x8 TN |
| 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 | 0.276 in |
|---|---|
| Outer diameter D | 0.394 in |
| Width B | 0.315 in |
| ISO bore code | — |
| Radial section height (D−d)/2 | 1.5 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) | 5 of 22 |
| Bore above smallest K-series size | 4 mm |
Cross references & equivalents
No verified interchange data yet. Send an inquiry and our team will confirm equivalents manually.
How the K7X10X8-TN model number is decoded
SKF catalogue number K 7x10x8 TN denotes a needle roller and cage assembly for a 7 mm shaft seat — the cage spaces the rollers, the machine parts provide both raceways, and the 8 mm width is all the radial room it needs. Reading the designation: K marks the needle roller and cage assembly, the three numbers give Fw 7 (shaft journal), E 10 (assembly outside diameter) and B 8 (width) in millimetres — the machine parts complete the bearing. SKF supplies these assemblies in single rows as tabulated; the cage quality determines the speed ceiling, and the catalogued 36,000 r/min limiting speed assumes a precision ground journal and bore. Selection arithmetic: C 2.81 kN against C0 2.75 kN gives a C0/C ratio of 0.98, and the 0.29 kN fatigue load limit Pu sets the floor for the adjusted-life calculation at contaminated lubrication. Mounting: grind the 7 mm journal to the catalogue raceway tolerance after hardening to 58–64 HRC, bore the housing to E 10 mm H6, and slide the assembly in axially — pressing through the cage distorts it and locks the rollers.
Typical equipment & failure modes
Common applications
- connecting rods of small compressors where radial height is critical
- rocker arm and rocker pin pivots on camshafts
- pump and gearbox idler gears running on hardened pins
- hinge and pivot joints in printing and textile machinery
Known failure patterns
- needle edge loading and raceway denting when the shaft deflects beyond the compensation range
- polymer cage deformation when the local temperature exceeds the 120 °C sustained limit
- grease starvation at the roller ends when relubrication intervals are stretched in dirty duty
- corrosion pitting from condensation in intermittently operated machinery
- smearing of rollers and journal during idle periods because the radial section holds too little lubricant
Selection pitfalls — read before you substitute
- At Fw 7 mm the rolling elements are under two millimetres long — handle the K 7x10x8 TN like a watch part: one dropped assembly, one over-pressed cup or one coarse journal finish outweighs any catalogue rating difference.
- The quoted 2.81/2.75 kN ratings are SKF catalogue values for this exact execution (K 7x10x8 TN); ratings can be revised without the order number changing, so keep the catalogue version (SKF catalogue PUB BU/P1 17000) with the drawing.
- 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.
- The 2.81/2.75 kN ratings and 0.9 g mass are SKF catalogue values transcribed from ch. 7.1 of PUB BU/P1 17000 (PDF table page 616); combined-type axial ratings appear in the text above because the structured record carries radial values only.
Frequently asked questions
Does the K 7x10x8 TN need a hardened and ground shaft?
No. In this execution the 7 mm shaft journal is the inner raceway: it must be ground and hardened to 58–64 HRC (with matching housing bore quality on the outside). If the shaft cannot meet that, order the inner-ring sibling (NKI/NA execution) plus its ground inner ring instead.
What mounting mistakes ruin a K 7x10x8 TN?
Slide the assembly over the ground 7 mm journal with a mounting sleeve, bore the housing to E 10 mm, and retain with a washer spanning the cage. Never press against the cage or rotate before the bearing is lubricated and loaded.
Is the K 7x10x8 TN sealed?
No — this execution is open and depends on the housing sealing arrangement; grease it at assembly and keep the relubrication interval short in dirty duty.
Which dimensions does the K 7x10x8 TN have?
A K 7x10x8 TN measures 7 mm bore/Fw × 10 mm outside diameter × 8 mm width (0.276 × 0.394 × 0.315 in). From SKF catalogue PUB BU/P1 17000: radial dynamic rating C 2.81 kN, static C0 2.75 kN, fatigue limit Pu 0.29 kN, limiting speed 36,000 r/min, reference speed 32,000 r/min, mass about 0.9 g.
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.