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Criterion boring head threads

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ronan walsh15/01/2019 16:53:38
497 forum posts
32 photos

I bought a used criterion boring head online yesterday, and am waiting for it to get here. The head is a 76mm/3" one, but has a bt40 shank on it. I want to order an r8 shank for it, would anyone happen to know what threads criterion use on these heads ? I want to get one as soon as possible, does 1 1/4 x 18 tpi sound right ?

Emgee15/01/2019 17:38:04
1067 forum posts
197 photos

Perhaps 1 &1/2" x 18

Emgee

Tim Taylor 215/01/2019 18:53:10
66 forum posts
8 photos

take a look here:

https://alliedmachine.cld.bz/Criterion-r?v=11519135013

Tim

ronan walsh15/01/2019 22:21:42
497 forum posts
32 photos
Posted by Emgee on 15/01/2019 17:38:04:

Perhaps 1 &1/2" x 18

Emgee

Emgee, yes i meant to type 1 1/2", seems to be a standard size with boring heads.

ronan walsh15/01/2019 22:22:09
497 forum posts
32 photos
Posted by Tim Taylor 2 on 15/01/2019 18:53:10:

take a look here:

https://alliedmachine.cld.bz/Criterion-r?v=11519135013

Tim

Tim, thanks for the link, but it does not lead anywhere.

Emgee15/01/2019 23:20:25
1067 forum posts
197 photos

Ronan, best wait until you have it in your hand to measure.

Emgee

ronan walsh15/01/2019 23:25:54
497 forum posts
32 photos
Posted by Emgee on 15/01/2019 23:20:25:

Ronan, best wait until you have it in your hand to measure.

Emgee

Yeah , i think you are correct.

Tim Taylor 216/01/2019 00:20:39
66 forum posts
8 photos
Posted by ronan walsh on 15/01/2019 22:22:09:
Posted by Tim Taylor 2 on 15/01/2019 18:53:10:

take a look here:

https://alliedmachine.cld.bz/Criterion-r?v=11519135013

Tim

Tim, thanks for the link, but it does not lead anywhere.

Copy & paste it into your browser - it is a link to Allied's criterion boring head technical specs for all their products

ronan walsh16/01/2019 13:46:25
497 forum posts
32 photos
Posted by Tim Taylor 2 on 16/01/2019 00:20:39:
Posted by ronan walsh on 15/01/2019 22:22:09:
Posted by Tim Taylor 2 on 15/01/2019 18:53:10:

take a look here:

https://alliedmachine.cld.bz/Criterion-r?v=11519135013

Tim

Tim, thanks for the link, but it does not lead anywhere.

Copy & paste it into your browser - it is a link to Allied's criterion boring head technical specs for all their products

Thanks Tim. The link won't work on my computer, but it does on my phone, frown

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