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Shars ER40 chuck on a PM1340GT

January Project of the Month [3]
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Alan H

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#1
My friend Mark Jacobs (@mksj) gave us a heads-up on the new Shars ER40 collet chuck a couple of months ago in this thread.

I bought the chuck and adapter plate from Shars and installed it on my PM1340GT. I thought I would share some detail via photos, video, and PDF here for others who may want a setup for their lathe.

Shars SKU numbers:
IMG_20180417_152911.jpg

The chuck out of the box -

IMG_20180417_153537.jpg

A few chatter marks at the end of the threads. Yes this bothers us perfectionists and I will likely skin those off there soon.

IMG_20180417_153645.jpg

Nice ground finish for Chinesium!

IMG_20180417_153727.jpg

Adapter shipped in used motor oil??

IMG_20180417_154052.jpg

The backing plate/adapter and the chuck.

IMG_20180417_155805.jpg

The adapter machined and ready for the chuck -

IMG_20180418_173848.jpg

Adapter skinned out, chuck installed, and ready to be Trued-up.

IMG_20180418_175648.jpg

Trued up and ready for next steps

I have also attached a PDF delineating some detail on machining the adapter plate.

Hope this helps others considering this purchase and adaptation to your your equipment.
 

Attachments

mksj

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#2
Nicely done Alan, came out surprisingly accurate and simple solution to the TIR error commonly seen in the non-adjustable ER chucks.
 

ttabbal

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#3
I put one on my PM1127 and have been very happy with it. Easy to adjust, accurate, repeatable. I'm glad to hear I didn't just get the one decent one they had. :)
 
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