Search found 81 matches

by Lodsb
Sat Oct 29, 2011 10:54 am
Forum: General Discussion
Topic: How to use a wiggler?
Replies: 24
Views: 4987

Re: How to use a wiggler?

I really have to disagree. A proper tool would be a stud with a shoulder & body. And yes, a recess to clear any burr around the hole. Finger tight, of course. Toolmaker's studs/balls -- they've been around for years. I would think that with all your so-called experience you'd have mentioned them ins...
by Lodsb
Wed Oct 26, 2011 8:21 am
Forum: General Discussion
Topic: How to use a wiggler?
Replies: 24
Views: 4987

Re: How to use a wiggler?

Ah. You were chastising my suggestion of using a bolt, not so much against using a stud. It was meant as a Q&D idea; a concept given to answer a question, intended to produce thought. Forgive me? :)
by Lodsb
Tue Oct 25, 2011 9:06 am
Forum: General Discussion
Topic: How to use a wiggler?
Replies: 24
Views: 4987

Re: How to use a wiggler?

I think using a bolt is probably better than poking something into a threaded hole. Easy enough to turn/thread these on a lathe if you need better accuracy. Not too sure if I buy the shifting thing - threaded tooling balls come to mind, as do threaded lathe spindles. Can't say I've ever noticed a bo...
by Lodsb
Mon Oct 24, 2011 11:11 am
Forum: General Discussion
Topic: How to use a wiggler?
Replies: 24
Views: 4987

Re: How to use a wiggler?

A stud & jamnut will provide an indexable surface standing proud of the work and centered within the threaded hole. A bolt with the head cut off.
by Lodsb
Fri Oct 21, 2011 8:42 am
Forum: General Discussion
Topic: How to use a wiggler?
Replies: 24
Views: 4987

Re: How to use a wiggler?

The bent one is for an indicator. So you would use that for centering round stock, like with a coax indicator, but not as convenient (the dial will move around the work instead of staying in one place)? You could, but that thing has got to be the worst way of using an indicator. Use the ball. There...
by Lodsb
Thu Oct 20, 2011 7:48 am
Forum: General Discussion
Topic: How to use a wiggler?
Replies: 24
Views: 4987

Re: How to use a wiggler?

The ball and disk points, steady them under power like you did with the sharp one and then soot them up with a match flame. Run it up against your work until a steady bright line appears - you're a half diameter away from the edge.. The bent one is for an indicator.
by Lodsb
Sat Oct 15, 2011 4:22 pm
Forum: Lathes
Topic: Cutting English threads on a southbend 9" lathe?
Replies: 70
Views: 8437

Re: Cutting English threads on a southbend 9" lathe?

Yeah, I was hoping for something like.250. I ran the numbers and came up with 47 and 28 tooth gears in compound, assuming you can double the stud gear and halve the QC input gear tooth counts, and have an 8 TPI leadscrew. You'll possibly need an idler too. That would be #3 and #4 cutters. Double ch...
by Lodsb
Sat Oct 15, 2011 1:57 pm
Forum: Lathes
Topic: Cutting English threads on a southbend 9" lathe?
Replies: 70
Views: 8437

Re: Cutting English threads on a southbend 9" lathe?

Yes, something like that. Leading edges, trailing edges, centers... Peak-to-Peak is what we're after. .280 is not a happy number, .280 x 3 = .840" lead, or 1.19 TPI. It means you will have to compound some gears. No big deal, but coming up with the gears might be an issue. You have a divider, likely...
by Lodsb
Sat Oct 15, 2011 12:00 pm
Forum: Lathes
Topic: Which 4 Jaw chuck for my Logan?
Replies: 11
Views: 2076

Re: Which 4 Jaw chuck for my Logan?

I saw somewhere a threaded chuck that just had a U-bolt on the spigot, didn't look split at all. Apparently just a squeeze of the u-bolt is enough to clamp it.

I've a couple of 11" lathes, one happens to be a Model 1955. Both came with 8" 4-jaw chucks.
by Lodsb
Sat Oct 15, 2011 11:19 am
Forum: Lathes
Topic: Cutting English threads on a southbend 9" lathe?
Replies: 70
Views: 8437

Re: Cutting English threads on a southbend 9" lathe?

You could use the lathe as a tool to measure that lead. Turn the chuck a half-turn and see how far the carriage needs to move to keep up. Most likely a nice number was used somewhere in the design, but it's fairly critical that it be correct. Maybe Bruce could measure crest-to-crest for us? Multiply...
by Lodsb
Wed Oct 12, 2011 8:51 pm
Forum: Lathes
Topic: Cutting English threads on a southbend 9" lathe?
Replies: 70
Views: 8437

Re: Cutting English threads on a southbend 9" lathe?

Is there a particular edition of MH that is good to have? I don't have one. Thnaks very much. Like Steve said, not much has changed other than: Get the large print version. I wish I had; the toolbox version has gotten hard for me to read. You'll have yours for years too. My point was that you reall...
by Lodsb
Wed Oct 12, 2011 8:59 am
Forum: Lathes
Topic: Cutting English threads on a southbend 9" lathe?
Replies: 70
Views: 8437

Re: Cutting English threads on a southbend 9" lathe?

According to MH, there is no "proper way" to make these things. "Because worms and wormgears are closely related to their method of manufacture, it is impossible to specify clearly the tooth form of the wormgear without referring to the mating worm." Grinding, milling, single pointing all produce di...