Search found 305 matches

by choprboy
Sun Jul 02, 2023 11:29 pm
Forum: General Discussion
Topic: Taps and Dies - balance between cost and quality
Replies: 22
Views: 2627

Re: Taps and Dies - balance between cost and quality

My preference for taps these days is OSG (Japan and US) and YG (aka "YG1", Korea). Since finding spiral flute taps, I rarely use a normal hand tap any longer, unless chasing a thread or I have nothing else to use. YG1 10-32 spiral 3 flute - $12 YG1 10-32 taper hand tap - $4 OSG 10-32 spira...
by choprboy
Sat Jun 17, 2023 12:29 am
Forum: General Discussion
Topic: Mill wiring help, kind of specific
Replies: 11
Views: 2208

Re: Mill wiring help, kind of specific

V1 ( # 11 ) is connected to a contactor ( KM2 reverse spindle ) V2 ( #9 ) also goes to the KM2 contactor U2 ( #10 ) to KM2 U1 ( #12 ) should be connected to something, in the drawing and actual it's empty, and I don't see any stray wire. U1 (#12) is connected to something. If you look at the pic an...
by choprboy
Fri Jun 16, 2023 12:00 pm
Forum: General Discussion
Topic: Mill wiring help, kind of specific
Replies: 11
Views: 2208

Re: Mill wiring help, kind of specific

I don't have a PM932... but I note a couple things odd about your wiring and diagram. One, it appears in your drawing that either the AC 220V IN or the X Power Feed is reversed. In the picture terminals 15&16 are bonded together with a shorting strap. There is an insulating divider and then term...
by choprboy
Thu May 18, 2023 10:03 pm
Forum: Milling Machines
Topic: Carbide insert pricing
Replies: 3
Views: 1790

Re: Carbide insert pricing

I think your part number has an extra zero in it. Should be OFER070405TN-M16 F40M That's a pretty big insert for most home shops, almost 3/4" circle, recommended feed per tooth is 0.0125". Seems to be used in 2.5-4" facemills with 4-8 inserts each. Price is fair. If I had a mill that ...
by choprboy
Sun Mar 19, 2023 11:37 pm
Forum: General Discussion
Topic: Mystery Tool
Replies: 6
Views: 905

Re: Mystery Tool

Looks like a wire wrap driver and a stripping tool to me, not sure what the third block is. Take a piece of wire-wrap wire, push it down into the slotted tool, and pull to strip the insulation off 1/4-1/2" from the end. Place the short end , now stripped, into the hole at the end of the wrappin...
by choprboy
Sat Mar 11, 2023 6:37 pm
Forum: General Discussion
Topic: An electronics question
Replies: 5
Views: 886

Re: An electronics question

Ah yes.. .a PWM circuit, much better than just trying to run the currently directly thru a potentiometer, what I was expecting based on the completely bare backside of the board and no apparent thru-holes or components. And yes a PWM circuit is a type of chopper circuit that turns on and off very ra...
by choprboy
Sat Mar 11, 2023 2:49 am
Forum: General Discussion
Topic: An electronics question
Replies: 5
Views: 886

Re: An electronics question

Well... that all depends on what you want to use it for... Potentiometers are available in many different sizes/shapes for mounting and are rated by 5 aspects: 1) Total resistance (or full scale resistance) - resistance of the potentiometer at full scale. 2) Resistance scale - typically either "...
by choprboy
Wed Sep 21, 2022 10:10 pm
Forum: General Discussion
Topic: Enlarging Involute Cutter IDs
Replies: 16
Views: 5385

Re: Enlarging Involute Cutter IDs

As I understand it from your original question, you don't want to use a standard R8 blank arbor or stub arbor and turn the blank/stub down to size because it is too short to use in the horizontal position and have support on both ends, correct? If so, could you turn a long arbor rod with the correct...
by choprboy
Sat Sep 03, 2022 8:33 pm
Forum: Milling Machines
Topic: Ditron DRO question?
Replies: 3
Views: 3725

Re: Ditron DRO question?

Yeah, not familiar with a Ditron DRO (and there seem to be a bunch of different versions), but it looks basically the same as any other DRO. If you are not working off an initial zero point off the part and calculating offsets to move to, then basically what Bill says. Switch to incremental mode, go...
by choprboy
Fri Jul 08, 2022 11:08 pm
Forum: General Discussion
Topic: Cut Off Toll Holder Hardware Source?
Replies: 9
Views: 4841

Re: Cut Off Toll Holder Hardware Source?

The "threaded rod with wedge head" that broke looks like a standard flat head screw, with half the head ground off. Could you just find an appropriate screw and take an angle grinder to the head to match the original?
flathead.jpg
flathead.jpg (10.08 KiB) Viewed 4703 times
by choprboy
Thu Jun 30, 2022 3:25 pm
Forum: General Discussion
Topic: Labeling fluid containers
Replies: 6
Views: 3067

Re: Labeling fluid containers

I posted a thread a couple years ago asking basically the same question. I tried a bunch of different things and nothing worked for more than a couple months. https://www.chaski.org/homemachinist/viewtopic.php?f=4&t=106065&p=383328 What I settled on has ended up working great. I cut some rin...
by choprboy
Wed Jun 15, 2022 1:38 pm
Forum: General Discussion
Topic: Surface Grinding
Replies: 181
Views: 71236

Re: Surface Grinding

Perhaps, it is redish-brown in color, epoxied to the ways. Various forums say Ryton, Turcite, Teflon... The existing have cracked/chipped in a few places, have fine (what seem like evenly spaced) horizontal grooves the length of the way. It's not exactly clear to me if that was intentional or the re...