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just a note - HSS is only expensive if you buy it new, not surplus. I have sold off probably 100 pounds or more of HSS from an estate for $2 to $5 per pound (depending on what and how nice). old broken end mills and saw blades are often HSS and make good tooling. for the queston about what...

it's perhaps a matter of opinion but I am strongly opposed to romex, for any permanent wiring I always ensure the wiring is enclosed in a full metal jacket - EMT or for very short runs, flex, for burried or outdoors unsheltered rigid conduit. it's pretty easy to drive a nail through Romex, or...

if you can provide basic info about the electrical components, a wiring diagram should be trivial to sketch out. is it an AC or DC motor, for example, variable speed? etc

Beware of treadmill motors, the can be used, and can be controlled by a suitable controller, but they are generally open to the environment and not designed fot sustained power. Many tomes the power rating is optimistic. You are almost always better off with an industrial motor

I will respectfully disagree, we are both right in some way. The lathe in question is driven by an electronic drive, probably a 3hr33 phase AC drive. Every variable frequency AC drive I fave used attempts to drive the motor to the commanded speed. Zero rpm means just that, the machine is...

The shock hazard of 240v is higher than 120, the potential for arc-over wit degraded insulation and water is also greater. And 220v plugs in the UK have integral fuses, at least the ones I have.

I'll probably need these next year, but this year I need some working space - I think these are probably shop made (both the V-blocks and the clamping pieces) but I don't know that for sure. One of the V-blocks has SIL stamped on one end, the other does not. they are almost an inch cube. $35...

let's go back to the original question of why the spindle turns at a low RPM - this is important - there is a huge difference between "off" and "zero RPM" to a controller. Off means it is unpowered. Zero RPM means that the motor is fully energized and will resist (to the best of its ability)...

you may find this useful: How Rotary Broaching Works by Polygon Solutions commercial rotary broaches aren't terribly cheap when new but they will make your square/hex/splined hole really efficiently

the calipers you folks are using are the ones sold by harbor freight here in the US, and they have a version already adapted to be a DRO for a small mill or drill press. My problem with them is that the battery life is abysmal.

I installed a SINO brand 2 axis DRO on my logan lathe - it took a few hours because I had to take some things apart, but the installation went exactly as instructed, and the unit is quite accurate - I replaced a Trav-a-dial that I had on the carriage that would slip from time to time. my lathe...

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A good friend and master machinist died a few years ago, I'm still trying to find homes for some items from his large collection of stuff. He taught me both somethign about machining, and to not be like him and let your stuff take over your life. So, here we have indexing plates and stuff - I...

actually you can buy new lathes like that, but you pay for them. and you can buy excellent used ones too, fome folks enjoy restoring the machnery. I personally use a 1970s Logan lathe, but there are tons of these southbend lathes out there. if you want to find folks that love this stuff, drop...

see photos, this is a Lindsay reprint, and Lindsay closed a few years ago so there will be no more of these -very high quality, not a xerox. this reproduction was printed in 1994, there is a little yellowing of the edges of the pages. $35 plus actual shipping (in the USA that will be under...

this nut can be made in brass - measure the minor diameter of the acme screw, make a brass piece whose outside dimensions match the damaged nut, then bore it to a little smaller than the value you measured. if you can't afford a tap, then notch the end of the acme screw for 2 or three threads...

I strongly suggest you visit the vintage machinery website.

Yes, alum was my number 1 item in the list upthtead. Maybe I was too terse?

I just put a heat gun on the aluminum and when it is too hot to touch, proceed. you can use a thermometer if you prefer.