Small silicon nitride ball bearing

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Discussion Overview

The discussion revolves around the search for a small cageless, angular contact silicon nitride ball bearing, specifically for use in a model jet engine. Participants explore potential sources and manufacturers for this type of bearing, which is not readily available to hobbyists.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant expresses difficulty in finding a small silicon nitride ball bearing with specific dimensions for a model jet engine.
  • Another participant suggests contacting local SKF distributors or searching for ceramic bearing manufacturers online, indicating that such bearings may not be readily available to hobbyists.
  • A participant mentions that they have contacted other bearing providers but had not previously considered SKF, and they note that they know of someone who recently purchased bearings that meet the specifications.

Areas of Agreement / Disagreement

Participants generally agree that finding the specified bearing is challenging, and there is no consensus on a readily available source. Multiple views on potential suppliers and approaches remain.

Contextual Notes

The discussion highlights the uncertainty regarding the availability of the bearings and the need for direct communication with manufacturers or distributors for specific inquiries.

Who May Find This Useful

This discussion may be useful for hobbyists, engineers, or anyone interested in sourcing specialized ball bearings for small-scale applications.

guss
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Hello, I need a small cageless, angular contact silicon nitride ball bearing (preferably deep groove) that is roughly 5 mm to 7 mm in inside diameter. This is to be used in a small model jet engine.

I have been looking for hours but can't find anything. Does anyone know where I can get a bearing like this? I really need some help here, or a lead on where to find something like this.

Thanks!
 
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Hi guss. I suspect there's nothing readily available to the hobbiest. Have you tried contacting your local SFK distributor? I seem to remember talking to one of their applications engineers a few years ago and he mentioned that SKF is now making them. Or just look for ceramic bearing manufacturers in Google, ThomasNet.com or similar web page. I suspect you'll need to talk to distributors or manufacturers directly to get an answer. The bearings won't be cheap, but you'll get a lot of help selecting a bearing and support for design if you go that route.
 
Q_Goest said:
Hi guss. I suspect there's nothing readily available to the hobbiest. Have you tried contacting your local SFK distributor? I seem to remember talking to one of their applications engineers a few years ago and he mentioned that SKF is now making them. Or just look for ceramic bearing manufacturers in Google, ThomasNet.com or similar web page. I suspect you'll need to talk to distributors or manufacturers directly to get an answer. The bearings won't be cheap, but you'll get a lot of help selecting a bearing and support for design if you go that route.

Thanks! I had contacted a few other bearing providers, but I hadn't heard of SKF. I just looked around their store (didn't seem to find anything, but I had trouble searching anyway) for a bit and sent them an email.

I know bearings that meet my specification exist because I know of someone who purchased some recently. It's just a scavenger hunt trying to find them.
 

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