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I have this untouched sl1000 for sale. I'd like to get $550 for it. It comes with the upgraded motor, vertical attachment, headstock handle, tool holder and power feed. Mechanically it is in very nice

Ouch! Clearly a tap is the right answer https://www.msdiscounttool.com/catalog/index.php?cPath=1082&filter_77%5B%5D=6954644536&filter_62%5B%5D=9017291595 But it is disappointing not to be able to use

Back in about the year 2000 my dad gave me a complete Unimat DB200 he was given by a man who had purchased it new. The man had a terminal illness and knew my dad was a machinist and wanted it to go to

Tim Metric threads are 60 degrees, the 55degree masters are Whitworth. Michael

If the master is made of a decent steel, and the follower brass, they will be OK without hardening. The amount of force on them and the hours of use will be so little that they will be fine. The main

They look simple enough to be 3D printed. I dont think there is much force on them. I could be wrong. I dont have the dimensions so i'M at a lose to make them. There must be an Sl owner who 3d prints

A nice little gem from the past: https://chestofbooks.com/crafts/popular-mechanics/The-Boy-Mechanic-700-Things-for-Boys-to-Do/Gear-Cutting-Attachment-For-Small-Lathes.html DW

The glove box latch on my ‘65 Lotus Elan is 3/4 x 27 Best Regards John

Hello Bill, I just found my information on the Atlas 6” lathe and it also shows 27 TPI as standard. I am know my 7x16 MicroMark minilathe can also be configured to cut 27 TPI. I have the

I just checked my Unimat SL masters and followers set and these are the ones that I have for inch and Whitworth.13, 14, 16, 18, 20, 22, 24, 26, 28, 30, 32, 36, 40, 48, 50, 56 TPISome of these are not

Tim, The Unimat thread masters I have had were not buttress thread form but “V” form. I would assume the metric thread masters are 55 degree thread form but I am not sure and the US version is

I think uncommon TPI configuration(s) were done on purpose to keep the rookies (like me) from trying my own repairs. This is an interesting thread though.... couldn't resist. Speaking of rookies, this

1/4" x 27 TPI was used on old electric lamps for brass parts. There are a lot of "odd" ones out there.?Jeff

Were they hardened? More to the point, since the followers are brass, can you get away with not hard? And are they cut with a buttress thread form? I've never actually seen a threading attachment. Tim

I just ran out back to look at my Clausing 4902. It has 27 tpi right on the QCGB. Also 22,23,24,26,28, then jumps to 32. No 25, no 30. OTOH, I looked up the Atlas threading supplement and a 10F will

This has piqued my curiosity—what equipment used 27tpi? It must have been common enough somewhere b/c I just googled it and found it's stupid easy to get 3/4-27tpi taps and dies. Not even that dear,

I am not going to call an Atlas lathe modern, but the threading chart I just looked at lists 27tpi as a regular thread. I have a need to cut 30tpi threads, and I'm going to need a 2nd 32-tooth gear

I'm not sure it would be easy to set up many modern lathes to cut 27 tpi. Not sure about some of the older ones either. I'll have a look at our old (1950s vintage) Cardiff to see if that can do it,

Given the high price of vintage Unimat thread masters, some thought might have to be given into machining some thread masters to order.

Hi Gang: In Trade School they recommended facing from the outside to the center. The rationale is if you start in the center and one corner is high, it will be too heavy to finish the cut. Light cuts