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Tube Replacement On Osborn Rotary Punch


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  • Members
Posted

Am replacing the punch tubes on a Osborn 155 rotary punch. two of the tubes threaded in properly, the rest will almost start to thread in but will not go any further then the first revolution. I need to clean up the threads, and would like to know what tap is needed for the job

Thanks for the help

T

  • Contributing Member
Posted

Are you sure the problem isn't with the TUBE? There's always somebody looking for a cheaper way to make juat about everything. Try one of the tubes that worked on the other holes.

JLS  "Observation is 9/10 of the law."

IF what you do is something that ANYBODY can do, then don't be surprised when ANYBODY does.

5 leather patterns

  • Members
Posted

The tubes a Osborn made tubes into an Osborn rotary punch, everything should be compatiable

  • Contributing Member
Posted

Oh, well then don't try it. Suit yourself :dunno:

JLS  "Observation is 9/10 of the law."

IF what you do is something that ANYBODY can do, then don't be surprised when ANYBODY does.

5 leather patterns

  • Members
Posted

I had already tried to thread the other tudes in place before you ever suggested it, and they do not go, need to clean up the threads, but do not know the tap size to use, it is not a 27 or 28 tpi thread, but somewhere in between. If anyone out there knows the tap size I would appreciate the information

  • Members
Posted

It is on here somewhere. I saw it in a thread about six months ago. I think it was bruce johnson who laid it straight. Be damned if i can find the thread.

"If nobody shares what they know, we will eventually all know nothing."

"There is no adventure in letting fear and common sense be your guide"

  • Moderator
Posted

I don't know what fits the rotary punches. I mostly get the single tube punches and have an outlet for the rotary punches as-is. You'd likely need to take a tube into the local hardware store and use their screw and nut checker to see what size tap will fit it. That is what I used to do until I got a thread checker of my own. They may be metric and may be fractional. Check both.

Bruce Johnson

Malachi 4:2

"the windshield's bigger than the mirror, somewhere west of Laramie" - Dave Stamey

Vintage Refurbished And Selected New Leather Tools For Sale - www.brucejohnsonleather.com

  • Members
Posted

Thanks for the hdwe store suggestion had not thought of that.

  • Members
Posted

The threading on the tubes for the 155 1-6 Osborn rotary punch turned out to be M7x1 metric threads. my tap arrived yesterday and it took very little effort to run the tap in and out, after which all but one of the punch tubes went in, on the stubborn tube I ran the tap in and out a couple more times and it to threaded in and went to full depth.

  • Moderator
Posted

Interesting because the #1-#7 tubes on the single tube punches I use a M8x1 tap. From there they got to a fractional for the #8 and I'd have to double check what runs the #9 - #10. Osborne does not seem to follow the KISS rule.

Bruce Johnson

Malachi 4:2

"the windshield's bigger than the mirror, somewhere west of Laramie" - Dave Stamey

Vintage Refurbished And Selected New Leather Tools For Sale - www.brucejohnsonleather.com

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