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fishoot
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Thread pitch for #2 Rolling Block
Nov 20th, 2020 at 4:45pm
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I thought I would make some screws for my Number 2 rolling block today.  Using a pitch gauge I measured my old, buggered screws to be 27tpi.   My lathe will not turn 27 so I cut a thread at 28 and the threads were fine for about 3 turns, then deformed.  I imagine its just going to require 27tpi.  Does anyone have knowledge of the factory screw pitch for these #2's?  If I can't make them, I could buy some for Rollingblockparts.com, but it would be nice to have confirmation on the correct pitch is.
  
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fishoot
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Re: Thread pitch for #2 Rolling Block
Reply #1 - Nov 21st, 2020 at 6:22pm
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I posted this yesterday but I don't see my post online.  Anyone have a clue? Huh
  
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ndnchf
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Re: Thread pitch for #2 Rolling Block
Reply #2 - Nov 21st, 2020 at 8:52pm
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Why do you doubt your thread pitch gauge? That ought to give you an accurate measurement. I don't know off hand, but I could measure one of mine. Which screw? But then I'd be using a thread gauge too....
  
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fishoot
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Re: Thread pitch for #2 Rolling Block
Reply #3 - Nov 21st, 2020 at 11:36pm
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I used my gauge on the mainspring retaining screw, trigger guard screws and tang screw.   I measured all at 27tpi.  My eyesight is not what it used to be, so maybe I am wrong.  I have found no reference for the screw size.  I am also unable to find a tap or die in this size, which makes me think something is off.  Don't take your rifle apart.  Maybe someone else has a reference for the size.  Thanks anyway.
  
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ballardhepburnmich
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Re: Thread pitch for #2 Rolling Block
Reply #4 - Nov 22nd, 2020 at 1:12am
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Just because you can't find a tap or die doesn't mean anything, there are a lot of gun screws of a pitch and diameter that you can't get taps or dies for.
Lee Gibbs  pres. ASSRA
  
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ndnchf
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Re: Thread pitch for #2 Rolling Block
Reply #5 - Nov 22nd, 2020 at 7:37am
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I pulled a front triggerguard screw. Looks like 27 TPI to me.
  
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ron
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Re: Thread pitch for #2 Rolling Block
Reply #6 - Nov 22nd, 2020 at 7:52am
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What is the OD of the screw?

ron
  
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Chuckster
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Re: Thread pitch for #2 Rolling Block
Reply #7 - Nov 22nd, 2020 at 10:50am
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FWIW, 27 TPI is standard for 1/8" pipe threads. Many lathes have this setting.
Chuck
  
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fishoot
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Re: Thread pitch for #2 Rolling Block
Reply #8 - Nov 23rd, 2020 at 11:19pm
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Unfortunately, my lathe does not have 27tpi capability, so unless there is a good source for a die, I will buy from rollingblockparts,com.  Thanks for your thoughts and consideration. Cry
  
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