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Here you go:

https://www.kollmorgen.com/en-us/products/motors/direct-driv...

and their page on success in CNC seems fairly impressive.

https://www.kollmorgen.com/en-us/service-and-support/knowled...

Edit: I'm not sure how accessible these are, but they have a life sales rep chat, so they seem to want to get them to you quickly...

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Generally, if a product requires talking to a sales rep, it's not marketed towards my interests (hobbyist automated microscopy and astronomy), and the product will be too expensive.

Ah yes, at that level, you've probably found lots of reasonable linear actuators - rotary motors paired with a screw drive - but I don't recall seeing any low-cost ones either. Maybe eBay is the best bet, but it's hit or miss. It does seem there would be a market for some low-cost options.

I used to work at Kollmorgen — they really are top-notch for this kind of work, but there is a relatively large used market available on eBay. No need to buy direct from them, unless you want brand new stuff at a markup.

My uncle uses Kollmorgen drives and servos on his homemade CNC, all sourced from second-hand machines and people, so it's totally possible to do!

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