09-11-2013, 05:27 PM
Seriously guys,
No-one really expects a first timer to measure their thread with wires?
After twenty five years in professional machine shops I think I've seen wires used in anger three or four times,(I use them myself from time to time but more as exercise than anything else).
For any standard thread, much more common is the use of a gauge nut, when not available good quality commercial nuts, get ten nuts, check the fit against a new tap of the given size, use the largest and smallest as a form of go-nogo gauge, Alternately take the new tap and use it to make a gauge nut, ideally using a good grade of normalised tool steel like a Silver steel.
Before anyone asks, these were mostly ISO9000 standard shops doing all manner of work including Auto manufacturing, Mining, some electronic industry and Aviation and Steelmaking. I rarely saw any rework coming through.
Larry seems to have done exactly what 99% of professional machinists do day in and out, after all, in hobby engineering isn't the most important thing that the thread you have turned fits the nut that it is to be used with?
I once did some critical Aviation bolts for a restoration project, the fitted bolts that hold the wings on! and the original manufacturer's specification gave a major diameter and a thread form, but the sizing was all based on the fit to a specific individual nut, that is each nut was stamped and the mating bolt was sized to match it with axial and radial clearances checked via a dial indicator.
Bes Regards
Rick
No-one really expects a first timer to measure their thread with wires?
After twenty five years in professional machine shops I think I've seen wires used in anger three or four times,(I use them myself from time to time but more as exercise than anything else).
For any standard thread, much more common is the use of a gauge nut, when not available good quality commercial nuts, get ten nuts, check the fit against a new tap of the given size, use the largest and smallest as a form of go-nogo gauge, Alternately take the new tap and use it to make a gauge nut, ideally using a good grade of normalised tool steel like a Silver steel.
Before anyone asks, these were mostly ISO9000 standard shops doing all manner of work including Auto manufacturing, Mining, some electronic industry and Aviation and Steelmaking. I rarely saw any rework coming through.
Larry seems to have done exactly what 99% of professional machinists do day in and out, after all, in hobby engineering isn't the most important thing that the thread you have turned fits the nut that it is to be used with?
I once did some critical Aviation bolts for a restoration project, the fitted bolts that hold the wings on! and the original manufacturer's specification gave a major diameter and a thread form, but the sizing was all based on the fit to a specific individual nut, that is each nut was stamped and the mating bolt was sized to match it with axial and radial clearances checked via a dial indicator.
Bes Regards
Rick
Whatever it is, do it today, Tomorrow may not be an option and regret outlasts fatigue.