Nema23 mounts

I’ve got these motor mounts from rattmmotor88 ebay seller for just $15.67 each one, shipping and hex screws included. Shipping was really fast (fedex), just eight days (I use to wait 30 to 50 days for items from china).

IMG_2908

Packaging could be better; there are some scratches, but nothing you can’t fix with a file. Internal milling is great. External sanding finishing looks nice, but flatness is somewhat compromised; milling finishing for mounting surfaces would have been great. I don’t understand why they make motor recess 42mm diameter when it should be 38mm; anyway this is not a serious issue. Of course a critical parameter in these mounts is the space they add between motor and mount surface; 40mm in this case.

As this kind of mount allows a lot of play between leadscrew axis and motor axis, you should be careful every time you install X or Y motors, especially if you’ve got heavy motors and/or your couplings are “flexible type”.

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  1. Hi Nema
    Thanks for sharing.
    Just curious, how you order stuff from China?
    Payment mode? Are they reliable? Quality ok?

    Steve W.
    (Singapore)

    1. I use to buy on ebay and pay by paypal. I buy regardless they provide tracking or not. In my case a lost package is a very, very rare event; even if you package get lost can complain to the seller or open a case to recover your money (in this case, a tracking number can be important). Quality depends; for example, chinese ER collets are not very good, but for the price they are a good deal; chinese carbide endmills, on the other side, are pretty decent. Usually I buy only from sellers having at least 99% positive feedback. The only downside, just for me, is delivery time, as my country is far away from China, but otherwise ebay is great.

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