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Operating a Myford 254 lever collet chuck

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Chris Pearson 120/09/2019 10:28:48
9 forum posts
1 photos

I am puzzled by the operation of this chuck and I can find nothing on line. It appears to have been made by Pfander. This is what I have been doing:

- load collet (163E)

- fit closer loosely

- place workpiece in collet

- tighten closer so that the lever has about about 1/4" of slack

- push lever to right - this locks the collet

To remove the turned article:

- push lever to left

- undo closer with spanner

My expectation was that a collet would be mounted and closed to a sliding fit over the workpiece. The lever would then lock it in place and subsequent operation of the lever in the opposite direct would release the article.

Am I doing something wrong, or am I expecting the chuck to do something for which it was not designed?

Edited By Chris Pearson 1 on 20/09/2019 10:29:20

Edited By Chris Pearson 1 on 20/09/2019 10:29:51

old mart20/09/2019 14:33:52
538 forum posts
43 photos

I last used a Burnerd lever collet in a Myford Super Seven 45 years ago, which should work in a similar way. The object of the mechanism is the speed of use, so when the closer is set for a little slack, then operating the lever should clamp the work, or release using only the lever. This should work if all the workpieces are the same od.

Edited By old mart on 20/09/2019 14:35:48

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