Keep the evidence with the model shortlist
The models on this page illustrate bearing roles; they are not confirmed replacements for an unspecified machine. Keep the original complete marking, machine position, load and speed duty, temperature, lubricant and mounting arrangement together. Check the candidate's recorded values below and leave unreported parameters unknown.
Check drawings and model records · Investigate a failure before replacing it · Plan installation and force paths
What matters in this application
Support location
Separate armature supports, gear supports and the output spindle; identify gear-generated thrust.
Speed and temperature
Use the actual shaft speed, load cycle and bearing temperature, not the motor label alone.
Dust and fit
Assess abrasive ingress, ring fits, sealing and housing condition.
Which bearing structures make sense?
Small deep-groove bearings
Investigate for correctly sized motor or shaft supports.
Check first: Clearance, seals and grease must match the exact application.
Angular-contact or other output supports
Use if required by the spindle's axial and radial loading.
Check first: Do not replace a specified support with a same-bore deep-groove model.
Recommended starting points
These candidates illustrate specific roles and envelopes, not a ranked list or interchangeable set. Review each condition before using a model in a design.
608
8×22×7 mmSmall rotating support · 8 mm bore
A compact 8×22×7 mm reference for a designed rotary support or roller.
- Dynamic C
- 3.45 kN
- Static C₀
- 1.37 kN
- Limiting speed
- 48000 rpm
Before selectionGeneric support-envelope references, not approved grinder/drill replacements or a maximum safe tool-speed list. Check load, seals, fits, clearance and actual shaft speed; this is not a linear bushing.
Open complete model data6001
12×28×8 mmCompact rotary support · 12 mm bore
A 12×28×8 mm deep-groove envelope to investigate where the shaft and housing design match.
- Dynamic C
- 5.4 kN
- Static C₀
- 2.36 kN
- Limiting speed
- 38000 rpm
Before selectionGeneric support-envelope references, not approved grinder/drill replacements or a maximum safe tool-speed list. Confirm the exact loading, sealing, lubrication and speed specification.
Open complete model data6203
17×40×12 mmRadial-support reference · 17 mm bore
A 17×40×12 mm deep-groove record for checking a compatible engineered support.
- Dynamic C
- 9.95 kN
- Static C₀
- 4.75 kN
- Limiting speed
- 24000 rpm
Before selectionGeneric support-envelope references, not approved grinder/drill replacements or a maximum safe tool-speed list. Match the full suffix and verify speed, grease, fits and contamination protection.
Open complete model dataCompare the recorded specifications
Different sizes and bearing structures are shown for different duties. C and C₀ are catalogue load ratings, not permissible equipment loads. Limiting speed is not an approved operating speed.
Swipe to see all models →
| Parameter | SKF608 | SKF6001 | SKF6203 |
|---|---|---|---|
| Bore d (mm) | 8 | 12 | 17 |
| Outside D (mm) | 22 | 28 | 40 |
| Recorded width (mm) | 7 | 8 | 12 |
| Dynamic C (kN) | 3.45 | 5.4 | 9.95 |
| Static C₀ (kN) | 1.37 | 2.36 | 4.75 |
| Catalogue limiting speed (rpm) | 48000 | 38000 | 24000 |
— = not reported, or not directly comparable for a mounted unit. Width conventions differ for inserts, complete units and bearing assemblies; inspect the dimensional drawing. Values are read from the current BearingScope records, not estimated from model numbers.
Work through the selection
- Read the original designation and identify its function in the tool.
- Confirm actual shaft speed and radial/axial loading.
- Match the full specification, mounting fit and lubrication.
- Use the manufacturer's reassembly, guarding and test procedure.
Symptoms worth checking
Hot armature support
Inspect fit, alignment, seals and lubrication.
Abrasive contamination
Review seals and airflow/dust paths before replacing the same open design.
Symptoms are investigation prompts, not a diagnosis. Isolate equipment safely and follow its maintenance procedures before inspection.
Have the original designation?
Look up the complete model and suffix before comparing potential alternatives.
Application questions, answered
Can any bearing with the same bore fit my grinder?
No. Outside diameter, width, seals, clearance, speed capability and the original tool design also govern.
Does the bearing limiting speed set the tool's safe speed?
No. The complete tool and accessory ratings, balance, retention and guarding remain controlling.
Reference basis & recommendation limits
- SKF — Bearing selection process
Application principles are informed by the listed technical references. Model shortlists are BearingScope editorial selections from its database, not manufacturer endorsements or equipment-fit approvals. Confirm the latest exact specification and the complete equipment design before use.