4” Backplate

4” Backplate

This topic has 7 replies, 3 voices, and was last updated 19 September 2022 at 20:28 by Vic.

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19 September 2022 at 14:13 #614135
Vic
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@vic
I’ve seen reference online of “The ISO standard Pratt Burnerd 4" system” in reference to Chuck Backplates. Do any of you know what the specifications are for this, register and PCD?
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19 September 2022 at 14:13 #20792
Vic
Participant
@vic
19 September 2022 at 14:22 #614138
Vic
Participant
@vic
I found this just in case it’s of use to others.
19 September 2022 at 15:15 #614142
Michael Gilligan
Participant
@michaelgilligan61133
Posted by Vic on 19/09/2022 14:13:08:

I’ve seen reference online of “The ISO standard Pratt Burnerd 4" system” in reference to Chuck Backplates. Do any of you know what the specifications are for this, register and PCD?

.

Strange that ISO would have standardised 4”

MichaelG.
19 September 2022 at 15:59 #614146
Vic
Participant
@vic
Agreed. PB no longer seem to sell a 4” chuck anymore either. Still, I have what I believe is the information I need so it just remains a curiosity as to where the information came from.
19 September 2022 at 16:34 #614152
Michael Gilligan
Participant
@michaelgilligan61133
So I searched for your phrase, complete with the quote marks, and landed here:

**LINK**

https://www.beaufortink.co.uk/lathe-spindle-thread-look-up-table

Nice diagram, but a questionable reference.

MichaelG.
19 September 2022 at 17:08 #614155
ega
Participant
@ega
MichaelG:

Great find, especially for wealthy folk looking for triple start threading gear!
19 September 2022 at 20:28 #614177
Vic
Participant
@vic
Posted by Michael Gilligan on 19/09/2022 16:34:35:

So I searched for your phrase, complete with the quote marks, and landed here:

**LINK**

https://www.beaufortink.co.uk/lathe-spindle-thread-look-up-table

Nice diagram, but a questionable reference.

MichaelG.

Thanks for that Michael. It doesn’t seem to match what I found in the PB reference.
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