WM210V adding 5C collets

[weston1968]

I added 5C collets to my modified WM210V with ELS. The result was 0.02 mm TIR at the collet face ( cheap Chinese ) and .05 mm TIR at 100 mm from the collet face with a 25 mm bar. All error but .005 mm TIR is the lathe.

I used:
nose: https://www.ebay.com/itm/185925466872
draw bar: https://www.ebay.com/itm/185931620956
hand wheel: https://www.ebay.com/itm/283301126357
I also had piece of aluminum bar for the spacer.

The 8" handwheel had a hub that was large enough for a 1.375" hole. The hub is tapered so it can not be bored on a lathe. I used a milling machine. I drilled a hole in the approximate middle of the hub. I then turned the drill bit around in the chuck, lowered it into the hole and rotated the hand wheel. I used a dial gauge and marked the high and low. I then clamped the hand wheel with the drill bit still in the hole. I then dialed in the error and using a milling bit made a large pilot hole. After that I used a 1/2" collet and used 1/2 shank bit to drill up to 1 3/8". The draw bar was 1.377" so I had to put the hand wheel in the lathe, albeit with wobble and sand out to a sliding fit. The casting is very heavy and a little unbalanced and causes some vibration above 400 RPM.

The result is surprisingly good for this grade of lathe.

 

[markba633csi]

Where there's a will, there's a pair of ways
Ha

 

[benmychree]

The flywheel effect of that big cast iron handwheel is liable to cause untightening of the collet when starting the machine, especially at a higher speed, I replace it with a much smaller diameter aluminum wheel, perhaps with some holes for a tommy bar or a pin spanner.

 

[weston1968]

Yes, it did that. I have to make it goodntight. I can not find an aluminum wheel with a hub that will allow a 1 3/8" bore and set screws.

 

[pontiac428]

Yes, it did that. I have to make it goodntight. I can not find an aluminum wheel with a hub that will allow a 1 3/8" bore and set screws.

But you have a lathe. Obstacles become opportunities!

 

[weston1968]

But you have a lathe. Obstacles become opportunities!

I am going to try printing out a plastic handwheel. STL attached. There are plenty of STL viewers out there for free. I am going to use M8x1.25 set screws with M8 knurled inserts.