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Source for 1" x 12 tpi Whit taps and die.

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Eugene:
Forward planning time .... I'd like to make some accessories for my Myford M type lathes which have 1" x 12 tpi Whit spindle nose; dividing head, rotary table, stuff like that.

Given a following wind I can turn a fair to middling thread, but I'd really like to run a final tap or die through to get the kosher thread form and match the existing precision spindle. Browsing the net I haven't found anything.

Any clues?

Thanks in advance,

Eug

John Rudd:
Looks to me that thread is a special, as the standard Whit thread form is 8 tpi......
You might try one of the specialist makers, Avon engineering.I used them for the t n d set for my Chester 9 x 20, but they aint cheap.....

Bluechip:
True, not BSW but .... WF Fredding stuff fairly common in sundry TPI's

Like here:

http://www.tracytools.com/taps-and-dies/whitform-taps-dies?product_id=1148

Will erode the Treasury somewhat though ..  :(

Dave

Eugene:
Dave,

Thank you, that looks very promising. I didn't see "Whitform" on their website.

Do I take it that this is a true Whitworth thread form not some made up type of thing, and that these are so named because they don't fit the "official Whitworth"  charts? There seems to be no technical description, it's probably so blindingly obvious that everyone understands but me. I can live with the price, didn't think it too bad at all.

Eug

mattinker:
I suspect that Whitform describes the thread angle, 55° as opposed to the Unified and metric 60° thread.

Regards, Matthew.

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