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These air bearings have gotten me really interested. Wikipedia states the only 3 disadvantages are 1: precision, 2: clean air, 3: requires power at all times
AKA the only problem is precision. The...

No question is a dumb question (except most questions) but the air bearings is very interesting, here is a video on them with a heavy side load
https://www.youtube.com/watch?v=lOTWx69mghM

There...

Grease is used for 18,000 - 24,000 rpm spindles simply because thats a low speed. There are plenty of high grade steel bearing that can operate at those speeds under grease (as jim has linked)....

Great bearing but horrible price. I can buy a new spindle motor for the same price. Ill just get a cheap ceramic bearing instead.

I found relatively cheap ceramic bearing, but no specs. Would any ceramic bearings work? Again my issue is finding the specs for the bearings not what material to use.

I am building a 30,000 rpm ATC spindle but I have a problem... The bearings... Searching for specs on a bearing is a pain in the ass and if it does provide specs the price is a bigger pain. There are...

I would be using HSS or carbide insert tool bits, depending on the material and application obviously. The machine is currently made from V slot aluminum extrusions with steel wheels however ill be...

I am in the process of building a cnc machine and I have everything figured out and almost built except the spindle. Currently im using a router as a temporary spindle however I want to make a 5kw or...

Yes my electric furnace can control the temperature but I dont know how accurate (since I made it myself) but ill try to getting it as close as possible. And thank you so much for the detailed answer...

What do you mean by riser? As for costs a 6" round stock 4 inches length can cost around $50 and only cost $5 in scrap aluminum. I am also using a electric foundry which runs about $1 a hour in...

I want to cast some 6061 aluminum round/bar stock for my lathe and soon to be built cnc machine due to the obvious cost savings. However after a test melt on some quality 6061 aluminum extrusions...