(02-19-2015, 08:44 AM)Sunset Machine Wrote: [ -> ] (02-17-2015, 06:57 PM)EdK Wrote: [ -> ]I'm still not sure how to deal with this yet. I think I'll try to make some 29 degree and 30 degree gauges out of sheet metal in an attempt to find out what type of thread these lead screws are. I'd much rather make new nuts to fit the existing lead screws if I can. I hate that my mill is going to be down and out for some time but I'm glad I decided to check the nuts prior to deploying the X power feed. Just rambling here. 
Ed
Just a thought, but wouldn't a standard fishtail gauge tell a story? go/no-go?
If you mean one of these than I'm not sure how that would help me measure an acme thread.
Maybe I'm missing something, probably am.
Ed
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attachment=10082]
I have one for standard Acme, great for getting the tip width correct, but wasn't much use on the 30 deg thread I ran across.
![[Image: 61nfTx119AL.jpg]](http://ecx.images-amazon.com/images/I/61nfTx119AL.jpg)
(02-19-2015, 01:12 PM)f350ca Wrote: [ -> ]I have one for standard Acme, great for getting the tip width correct, but wasn't much use on the 30 deg thread I ran across.
I have one of those but I'm not sure how to use it since it doesn't fit down into the thread to measure it.
Ed
(02-19-2015, 01:19 PM)EdK Wrote: [ -> ]I have one of those but I'm not sure how to use it since it doesn't fit down into the thread to measure it.
Ed
Ed,
It doesn't measure the thread, it is for 'measuring' the tip width of the tool that cuts the thread.
DaveH
look in enco's catalog and get a regular acme thread gauge with all the little leafs for the different pitches, that will probably look about like the one for regular asme thread one that you probably already have
sorry this is one MSC not enco
http://www.mscdirect.com/product/details...0=63326367
(02-19-2015, 02:04 PM)DaveH Wrote: [ -> ] (02-19-2015, 01:19 PM)EdK Wrote: [ -> ]I have one of those but I'm not sure how to use it since it doesn't fit down into the thread to measure it.
Ed
Ed,
It doesn't measure the thread, it is for 'measuring' the tip width of the tool that cuts the thread.
DaveH
Yup, I'm realizing that now. It was advertised as being an acme thread gauge which it clearly isn't. I assumed and made an ass out of me. Time to order the proper acme thread gauges.
Ed
Don't think they'd help you Ed. Its 10 tpi so the metric one probably wouldn't fit down into the threads enough to check the angles if it is metric. Grind a piece of sheet metal to fit the gauge you have, if it fits the lead screw its standard acme, if not use a protector to get 30 get and see if it fits.
(02-19-2015, 06:07 PM)f350ca Wrote: [ -> ]Don't think they'd help you Ed. Its 10 tpi so the metric one probably wouldn't fit down into the threads enough to check the angles if it is metric. Grind a piece of sheet metal to fit the gauge you have, if it fits the lead screw its standard acme, if not use a protector to get 30 get and see if it fits.
That's my task for this weekend. Make some sheet metal gauges and get this thread figured out so I can move on.
Ed
There is a difference between a screw cutting gauge and a screw pitch gauge. I'd follow Greg's suggestion.