Thread: Bridgeport spindle grinding

Did it come out Ok to Good?
Buck

Michiganbuck the runout seems fine, the keys were a little fussy to make but not too bad, the newest project on it is to adapt a new dc motor to the machine for the quill feed the old one let the magic smoke out and it seems the factory that reinstalls the smoke is kind of spendy and has a core charge on their smoke so I made a adapter yesterday.

Good update. When you get it running you won't want to run a Series I any more.

Fun read thanks for bringing this back up Buck

This mill has been on the back burner for years, it’s nice to be finally getting it done I’ve used my Cnc mill for doing everything and it would be nice to have a manual mill for doing a lot of things, the head on the mill will have to come apart again at some time point there is a flat spline??? Coupling that I believe has a funny wear pattern to it from the machine being run with bad bearings for so long that it chatters.

I have some spare head parts. Let me know what you need and I'll see what we can work out.

Gbent these are the parts I suspect are my noise makers

If those are your noisemakers they should only rattle in low gear. They have clearance in high gear. If they rattle slightly in high gear, your hi-lo lever needs an adjustment to hold them slightly further apart.

They are engaged in high and disingaged in low, as far as I know

I finished the new motor install on the power quill feed today, I’ve been waiting on a woodruff key cutter for the adapter shaft which was Mia in the mail for awhile. Like I mentioned in a previous post the original feed motor let the smoke out and the Oem motor seemed rather pricey so I purchased a 90v 1800rpm 48c permanent magnet motor off the bay and a new dc speed controller and made a adapter from the new motor to the harmonic quill feed, got it finished up today and it seems to work well as far as feed speed and stable movement of the quill.

This is the method that I used to re grind the 40 international taper on this Beaver Milling Machine spindle. TIR reduced from about .0015" to less than .0001".

Replaced the drive clutches today the head runs nice and quiet now and I also started on the new x axis feed drive install