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
Position and motion
Separate rotary feed rollers from linear carriage guidance and precision press cylinders. Record which support fixes axial position and which accommodates growth.
Accuracy and register
Check runout and stiffness at the working surface, not only shaft diameter. Housing alignment, ring seating and the assembled clearance affect repeatability.
Process exposure
Identify paper dust, ink, cleaning agents and heat. Lubricant and seals must suit the process without contaminating printed material.
Which bearing structures make sense?
Deep groove ball supports
An option for independently designed auxiliary feed or drive rollers with suitable radial and axial loading.
Check first: Match the complete envelope and speed/load duty; no printer-brand fitment is implied.
Special printing-cylinder arrangements
Press cylinders can require purpose-designed locating/non-locating assemblies or eccentric adjustment features.
Check first: Keep the machine drawing and assembly specification; ordinary catalogue dimensions do not capture these functions.
Track rollers and linear guidance
Investigate these where the component follows a track or moves along an axis.
Check first: A rotary ball bearing mounted on a shaft does not provide linear guidance along it.
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.
6001
12×28×8 mm12 mm shaft · auxiliary roller-support reference
A compact 12×28×8 mm catalogue envelope for assessing a separately designed rotary feed support.
- Dynamic C
- 5.4 kN
- Static C₀
- 2.36 kN
- Limiting speed
- 38000 rpm
Before selectionNot a printing-cylinder or branded-printer replacement. Verify roller reactions, runout, axial retention, sealing and grease.
Open complete model data6205
25×52×15 mm25 mm shaft · larger auxiliary support reference
A different envelope for an independently sized drive or feed shaft; compare its actual ratings and installation space.
- Dynamic C
- 14.8 kN
- Static C₀
- 7.8 kN
- Limiting speed
- 18000 rpm
Before selectionDo not substitute for 6001 or an eccentric support unit. Check the complete shaft/housing design, load, thermal movement 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.
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| Parameter | SKF6001 | SKF6205 |
|---|---|---|
| Bore d (mm) | 12 | 25 |
| Outside D (mm) | 28 | 52 |
| Recorded width (mm) | 8 | 15 |
| Dynamic C (kN) | 5.4 | 14.8 |
| Static C₀ (kN) | 2.36 | 7.8 |
| Catalogue limiting speed (rpm) | 38000 | 18000 |
— = 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
- Locate the bearing in the mechanism and record the original part number, complete suffix and all mounting dimensions.
- Establish the roller or cylinder forces, speed range, accuracy target and axial-location strategy.
- Separate standard auxiliary supports from machine-specific cylinder, track and guide assemblies.
- Check sealing, lubricant compatibility and assembly settings; verify alignment and repeatable output through the equipment's commissioning procedure.
Symptoms worth checking
Uneven feed or repeated marking
Inspect roller surfaces, runout, alignment and nip loading; the bearing is only one possible contributor.
Changes after warm-up
Review thermal expansion, bearing seating and the locating arrangement before changing the clearance grade.
Contaminated grease
Inspect seal condition and cleaning practices; a shield is not a barrier against every process fluid.
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 a printer bearing be identified from shaft diameter alone?
No. The outside diameter, width, mounting, motion, accuracy and complete machine part specification also matter.
Is the 6001 shortlist a replacement for any printer?
No. It is a real database record for an engineered auxiliary rotary support with matching dimensions and duty. It is not an equipment compatibility claim.
Where are 3D printer bearings covered?
The separate 3D-printer guide distinguishes spool rollers, rotary idlers and linear guidance. Use the link below for that application.
Reference basis & recommendation limits
- Schaeffler — Bearing Solutions for Printing Machines
- Schaeffler — TPI 222 High Precision Bearings for Printing Machinery
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.