standard thread size for handles

gents,

what's the standard threading size for a safety razor handle? my wife's uncle owns a precision CNC shop and he might turn a handle for me if I can get him some dimensions and threading size.

thanks!

I am sure that others will chime in as well. It is my understanding that most razor handles and heads are 10-32 or M5x0.8. Since M5x0.8 is a little larger a handle threaded for it will work with the smaller 10-32. I know my custom handles m5x.8 worked with my New OC razor heads.

Go metric.

It will work with more razors.

You need to get the wife's uncle a few cases of beer. Butter him up and sweet talk him into making a bunch of stuff! We'll all chip in man!!!

Hahahaha.

By the way, I’ve seen a couple of cases lately where it’s been mentioned that the length of the threading on a head or in a handle is of irregular length. That might be something to also take into consideration, but I’m not sure if there is a standard. Probably best to make sure the threading in the handle is sufficiently long — better to have a little extra than to run out before the head is fastened.

I am sure that others will chime in as well.  It is my understanding that most razor handles and heads are 10-32 or M5x0.8.  Since M5x0.8 is a little larger a handle threaded for it will work with the smaller 10-32.  I know my custom handles m5x.8 worked with my New OC razor heads.

thanks

Go metric.

It will work with more razors.

You need to get the wife's uncle a few cases of beer. Butter him up and sweet talk him into making a bunch of stuff! We'll all chip in man!!!

Hahahaha.

haha. he was very receptive to the idea, actually and was wanting me to get him the standard thread sizes so he can turn one. I'll be seeing him at the end of this month and will show him some of the handles on my current razors to get some ideas brewing.

By the way, I’ve seen a couple of cases lately where it’s been mentioned that the length of the threading on a head or in a handle is of irregular length. That might be something to also take into consideration, but I’m not sure if there is a standard. Probably best to make sure the threading in the handle is sufficiently long — better to have a little extra than to run out before the head is fastened.

thanks

The main exception that I know of is the Fatip, which I think has larger dimensions than the two stated above, so doesn't work really well with either of them.

The statement about the length is key though. Some razors won't like a longer threaded portion, so use a couple of your favorites to determine what length to use.

The main exception that I know of is the Fatip, which I think has larger dimensions than the two stated above, so doesn't work really well with either of them.  

The statement about the length is key though.  Some razors won't like a longer threaded portion, so use a couple of your favorites to determine what length to use.

thanks.

10-32 or M5x0.8

10-32 is old school, like vintage Gillette New etc. However, the Rockwell 6S also uses the SAE 10-32 threading because of manufacturing reasons. Just about everyone else uses the metric thread M5x0.8. If I was designing a head or handle, I would go metric. Exact compatibility is better than close enough compatibility. Compatibility with more razors is better than compatibility with fewer razors.

You can read about the pitch and diameter difference in this article.
http://sharpologist.com/2016/03/good-bet...razor.html

10-32 or M5x0.8

10-32 is old school, like vintage Gillette New etc.  However, the Rockwell 6S also uses the SAE 10-32 threading because of manufacturing reasons.  Just about everyone else uses the metric thread M5x0.8.  If I was designing a head or handle, I would go metric.  Exact compatibility is better than close enough compatibility.  Compatibility with more razors is better than compatibility with fewer razors.

You can read about the pitch and diameter difference in this article.
http://sharpologist.com/2016/03/good-bet...razor.html

thanks for the link. I'll be seeing my wife's uncle in about 2 weeks...I'll relay the information and show him some of my handles to see what he can come up with.

I If he is a machinist, can send you thread guides to determine appropriate threading. 

There are 2 metrics: diametre of the fastener and spacing of the threads. 

For motorsports usage specing machining or determining an unknown torque value, will make an assessment of thread diametre/pitch using thread checkers as it quick, easy and accurate. Prefer the MSC checkers arrayed on a wire:



Or these cards of various sizes:



The best amongst us will employ a Mitutoyo Thread Guage:


Or for the MIT/CMU grads:



While possessing all these, find the mechanical thread checkers arrayed on a wire or plate the quickest and more than adequately reliable. 

One could choose to go to a local Home Depot or Lowes, toting the pieces to avail self of the fastener arrays they have in their fastener ailes if too parsimonious to spend the money on any of the gauges suggested - but truth told, every home should have some method to check common fastener sizes. Experience indicates 5x0,8 metric the new standard but likely NOT universal. Under NO circumstances is mixing metric with SAE or Screw Pitch EVER recommended and WILL end in tears - GUARANTEED.

Home handymen need wrap their head around the fact that fasteners are not of same philosophy where imprecision and covering with paint suffice. Am constantly frustrated at the atrocious quality of construction and repair that goes into most families’  single biggest lifetime investment. If I prepared cars as homes are built, virtually every one of my clients would die; same can even be stated of auto manufacturers: if they built autos as homes are built, millions of people would die on a daily basis - it cuts to the heart of character and being a man....