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Author Topic: Primer Bushing Thread Size  (Read 16705 times)

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fc60

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Primer Bushing Thread Size
« on: September 08, 2010, 02:24:44 pm »
Greetings,

Does any one know the proper thread size for the Primer Punch Bushing, Item #26?

My best guess so far is 0.400-27 UNS, based on the three that I measured.

Nothing comes close in the Machinery Handbook.

I suspect buying a tap would be a major challenge.

Cheers,

Dave Wilson
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z_e_n

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Re: Primer Bushing Thread Size
« Reply #1 on: September 08, 2010, 10:08:05 pm »
While we're on the subject of threads, i'm also trying to figure out the thread for the steel ball plug. Hope anybody can help. Thanks.
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SWANEE

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Re: Primer Bushing Thread Size
« Reply #2 on: September 08, 2010, 10:24:27 pm »
Hi Guys, Not to sure the threads on the bushings but I do have some extras along with the punches, as for the ball plug I think it is a 1/2 x 27, I may have an extra of those too. Give me a PM if interested.
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fc60

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Re: Primer Bushing Thread Size
« Reply #3 on: September 09, 2010, 11:25:48 am »
Greetings,

I measured Item #54, Steel Ball Plug, and find it to be a 9/16-27 UNS thread. Sure glad my lathe cuts a 27 thread!

Cheers,

Dave
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askimball (Doc)

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Re: Primer Bushing Thread Size
« Reply #4 on: January 23, 2011, 12:44:48 am »
fc60
I have some dies/taps of that size, let me know for sure & I'll borrow 1 to you.... ;D
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Doc - I.Y.A.A.Y.A.S.
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ARTINCT

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Re: Primer Bushing Thread Size
« Reply #5 on: January 24, 2011, 09:45:18 am »
Quote from: askimball on January 23, 2011, 12:44:48 am
fc60
I have some dies/taps of that size, let me know for sure & I'll borrow 1 to you.... ;D

Dave: What brand and model lathe do you use?  I will be retiring soon and may want to get
a lathe. 
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Art In Connecticut

fc60

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Re: Primer Bushing Thread Size
« Reply #6 on: January 24, 2011, 11:46:43 am »
Greetings,

I have a South Bend 13" lathe with the quick change gearbox.

You may wish to consider the smaller South Bend Heavy 10 with the wide range gearbox. I believe it cuts 27 pitch threads without a supplemental gear. It have the larger 1 3/8" through the spindle bore for barrel work.

Cheers,

Dave
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