Re: Question for you guys that are tech savvy
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I have some of Dougs belts and also some from Toms Tool Store. Both are great quality. I bought the O ring first and experimented with each one, All worked great. I was hoping the the O rings would slip a bit if needed to act as a safety feature, I would rather have them slip then break something else. So far no slippage and they are easy to put on and remove. I have several Unimats and since I converted two of them to the 24vdc motors years ago, I rarely change belts. I also remove the belts when not using the lathes. I have inclosed a photo of the earlier belts that Unimat used. ?Jeff
On Saturday, July 15, 2023 at 12:17:06 PM EDT, Jkle379184 via groups.io <jkle379184@...> wrote:
I have some of the very old OEM ones, they used two different types, one was a twisted "fibre" tope like and the other was a similar to a mini V belt. The mini V belts look like a O ring and are rounded on the top, but they have a slight flat sides to form a V on the inside.? Jeff
On Saturday, July 15, 2023 at 11:58:29 AM EDT, Charles Kinzer <ckinzer@...> wrote:
I got belts from Doug Feistamel at his site at
At the bottom of his home page, he describes his belts in detail saying they are polyurethane.? They happen to be orange, but it should be noted that the "industry standard" for O-Ring colors is not a hard and fast rule.? And the ones from Unimat-Vintage-Lathe don't seem to be a standard O-Ring anyway but a purpose designed belt that happens to look just like an O-Ring.
I consider these to be top quality belts.
I used to design instrumentation for deep ocean applications and used many O-Rings for sealing purposes.? There are many materials and "durometers" (hardness) and there are plenty that would not be suitable for a Unimat drive belt.? So, if you just buy some O-Ring, it might or might not be suitable.
Charles E. "Chuck" Kinzer
On Saturday, July 15, 2023 at 08:21:10 AM PDT, Jkle379184 via groups.io <jkle379184@...> wrote:
Ok, I am on a learning curve right now. It looks like the color is important, the industry uses the color of the O ring as a code to tell what it is made of. I got lucky years ago when I ordered the white ones. Here is a link to what the colors mean.
And here is data on the white ones that I have
If you do a web search of -334 or -339 Oring 70 Duro White FDA NBR you will find many sources for them. Here is a data link for the black ones
Jeff
On Saturday, July 15, 2023 at 10:24:49 AM EDT, Jkle379184 via groups.io <jkle379184@...> wrote:
I got them on Ebay a few years ago, they are? a standard size O ring. I will check my notes to see if I wrote down the O ring sizes. ?Jeff
On Saturday, July 15, 2023 at 09:23:12 AM EDT, OldToolmaker via groups.io <old_toolmaker@...> wrote:
Hello Jeff,
Where do you purchase your white buna belts?
Dick
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