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Member postings for John Wright 19

Here is a list of all the postings John Wright 19 has made in our forums. Click on a thread name to jump to the thread.

Thread: Milling/drilling spindle
20/12/2018 10:22:22

Seen the posts here about milling spindles.

I recently made a new internal cassette for a Potts milling spindle I bought using a ER16 long size and made a new outer for it that houses 2 angular contact bearings that just fit the ER16 tube and the machined outer recess. I fitted 2 spring washers so there is a very little end float. I made a new mount that clamps around the old Potts spindle to take the motor and fitted a 3 high power 3 phase servo motor with the encoder disabled and it runs via a very cheap 3 phase power unit off Ebay. The motor is not really designed for continuous running like this so I cooled it with a finned jacket that reduces the temperature so it does not overheat. The motor runs nice and cool and with variable speed ands can run either direction. I have cut large clock wheels like this. The Potts is a great piece of kit and I can use it on either my Boxford lathe or my Rivett lathe. I can change et up of the spindle quickly to drill or mill or index if I want to use the cutter in the lathe.

Hope this is of interest

John

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