Ceramic Ball Bearings 1204 / 1205

Standard Bearing Sizes for OEM and Replacement Orders

When buying ceramic bearings in bulk, the first concern is often quite simple: will the bearing match the part already in the machine?

For this reason, the 1204 and 1205 models are best ordered by checking the actual bearing size, internal design and material specification together.

The 1204/1205 series on this page is offered with ceramic rings and ceramic balls, with a PTFE cage. The available ceramic materials listed are Si₃N₄ and ZrO₂.

For buyers who already have a bearing drawing, old sample or part number, we can work from that information instead of asking you to select the bearing from a photo.

For a standard bearing order, buyers often send only the model number.

That works when the model is already confirmed.

For OEM or replacement work, however, we suggest sending one more piece of information:

the drawing or the old bearing sample.

This is especially useful when:

The bearing has no clear marking

The old part is from a different supplier

The machine has been modified

The original bearing is no longer available

You are developing a new component

A photo can help, but a drawing is much better for confirming the final specification.

Both materials are listed for this series, but they are not simply two names for the same material.

Si₃N₄ and ZrO₂ have different physical properties, so the choice should follow the machine requirements.

If your engineering team already specifies the ceramic grade, send that information with the RFQ. If not, we recommend confirming the speed, load and working temperature before choosing the material.

This avoids quoting a ceramic grade first and finding out later that the specification needs to be changed.

For a ceramic bearing quotation, a short but clear RFQ saves time.

You can send:

Model: 1204 / 1205
Quantity: ___ pcs
Ceramic material: Si₃N₄ / ZrO₂
Precision: P0 or required grade
Seal: Open / required type
Application condition: ___
Target quantity: Sample / Trial / Mass order

If you do not know the ceramic material, just send the drawing, old bearing photo or machine requirement. We can check the specification before quoting.

Q1: Do you supply both 1204 and 1205?

Yes. Both models can be quoted separately according to the required quantity and specification.

Q2: Can I order 1204 and 1205 in the same batch?

Yes. Mixed model orders can be discussed. Please list the quantity for each model separately.

Q3: Do I need to specify the ceramic material when requesting a quote?

It is better to do so.

The listed options include Si₃N₄ and ZrO₂, and the two materials should not be treated as the same specification. 

Q4: Can you quote from our drawing instead of the bearing model?

Yes. For OEM orders, a drawing is often the easiest way to confirm the correct version.

Q5: Can you add our part number to the bearing?

Customized marking can be discussed for OEM orders. 

Q6: Is 1205 available as an open bearing?

Yes. The listed specification shows an open bearing.

Q7: What if I only know the dimensions but not the bearing model?

That's fine. Send the bore, outside diameter and width. A photo of the bearing can also help us identify the structure.

Q8: Which 1205 dimension should I use?

The current source page contains two different 1205 dimension entries: 25 × 52 × 15 mm and 25 × 55 × 13 mm. We would not recommend choosing between them based on the webpage alone. The final drawing or confirmed supplier specification should be used for the order. 

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