Replacing Barrels?

ViggoG · 01-05-2003, 06:37 PM

Ron & Herb,
Ron,
Thanks, I was uncertain if there was a catch22 in there somewhere.
Yes the Ideal Repro requirements are a device having the similar appearance, dimension and operation. So I feel clear on that bit. thanks again. [img]biggrin.gif[/img]
Herb,
In normal circumstance one can usually assume that threads are of a nature that a screw moves in when turned in a clockwise direction.
Left handed threads are usually marked with a double grove on the bolt head.
This no accident, as the design of the engine lathe is such that it is usually easier to machine right handed threads.That is cutting from the right to the left with the top of the shaft rotating toward the operator always results in a right handed spiral cut.
Just remember "If not otherwise indicated, one can assume that the thread is of right hand nature".
At rare times a film becomes flipped left to right in processing, and if such happened it would appear to reverse the direction of the thread in the section of the film that had been so flipped.
Just perhaps, that may be the case. <img src="graemlins/wave.gif" border="0" alt="[byebye]" />
ViggoG

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01-05-2003, 06:37 PM	#4
ViggoG RIP Join Date: Jun 2002 Location: South Side Virginia Posts: 534 Thanks: 0 Thanked 1 Time in 1 Post	Ron & Herb, Ron, Thanks, I was uncertain if there was a catch22 in there somewhere. Yes the Ideal Repro requirements are a device having the similar appearance, dimension and operation. So I feel clear on that bit. thanks again. [img]biggrin.gif[/img] Herb, In normal circumstance one can usually assume that threads are of a nature that a screw moves in when turned in a clockwise direction. Left handed threads are usually marked with a double grove on the bolt head. This no accident, as the design of the engine lathe is such that it is usually easier to machine right handed threads.That is cutting from the right to the left with the top of the shaft rotating toward the operator always results in a right handed spiral cut. Just remember "If not otherwise indicated, one can assume that the thread is of right hand nature". At rare times a film becomes flipped left to right in processing, and if such happened it would appear to reverse the direction of the thread in the section of the film that had been so flipped. Just perhaps, that may be the case. <img src="graemlins/wave.gif" border="0" alt="[byebye]" /> ViggoG