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  • Several Regions have held meetups already, but others are being planned or are evaluating the interest. The Ontario GTA West area meetup is planned for Saturday April 26th at Greasemonkeys shop in Aylmer Ontario. If you are interested and haven’t signed up yet, click here! Arbutus has also explored interest in a Fraser Valley meetup but it seems members either missed his thread or had other plans. Let him know if you are interested in a meetup later in the year by posting here! Slowpoke is trying to pull together an Ottawa area meetup later this summer. No date has been selected yet, so let him know if you are interested here! We are not aware of any other meetups being planned this year. If you are interested in doing something in your area, let everyone know and make it happen! Meetups are a great way to make new machining friends and get hands on help in your area. Don’t be shy, sign up and come, or plan your own meetup!

Thread Repair of a stripped out Master Jaw

Yes, the TPG came with an adapter that takes standard 1/8” shank mounted stones. It gives great versatility when it comes to selecting cutting tools/stones.

Here are the types of stones I can use. L to R: regular 3/8” bore grinding wheels directly mounted on the spindle; 1/4” bore stones with the adapter/extension; and the 1/8” mounted stones with the 1/8” collet adapter.

The spindle is capable of 36600 rpm, so even the little 1/4” stones work well.
4E9D05B3-BE42-4E15-8C94-BD0051AAE818.jpeg
 
I was hesitant as well. When you see Pratt’s prices for accessories, a set of MJs would have set us back $1K+, assuming you can find one. So I had to try it at least, as it was not safely usable.

Option ”B” would have been to weld up the hole and re-thread it to 3/4”-10 in the hope that the weld fill is not as hard as the jaw. Heat distortion becomes a big factor with welding.
 
When I saw thread I thought grind and loctite in a sleeve (at 3000 psi on steel should be more than enough)...but its moot as you challenged the machining gods and won!
 
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