Search found 162 matches

by TRX
Sun Oct 28, 2018 5:05 am
Forum: Lathes
Topic: lapping internal taper?
Replies: 20
Views: 15777

I found this company: https://triaticinc.com/tapered-diamond-hones/ They look like steel spindles impregnated with diamonds. I'd call them laps, they call them hones. There's also a company that makes a "taper honing machine". Their web site is the usual Flash and Java infected mess, but b...
by TRX
Mon Oct 22, 2018 7:12 pm
Forum: Milling Machines
Topic: tooling plate
Replies: 8
Views: 8182

Re: tooling plate

Flathead screws made from threaded rod might be better than socket head set screws; you could use a pick to clean the slot before unscrewing them, rather than trying to dig or blow chips out of the socket.
by TRX
Mon Oct 22, 2018 7:10 pm
Forum: Milling Machines
Topic: Wavy Parallels. What are they good for?
Replies: 8
Views: 10241

Re: Wavy Parallels. What are they good for?

A former employer had a few. I liked them because they didn't fall over like thin parallels, when I opened the jaws to change parts.
by TRX
Sat Oct 06, 2018 6:33 pm
Forum: Milling Machines
Topic: Morse taper end mills
Replies: 7
Views: 7153

I can't see how a standard Morse taper with tang could work without some sort of retaining mechanism. That's current thinking. Elsehwere in the book I found more pictures of tanged Morse end mills in conjunction with Brown & Sharpe horizontal mills. Which is doubly odd, since they also show &qu...
by TRX
Fri Oct 05, 2018 11:22 pm
Forum: General Discussion
Topic: metric drill set explained?
Replies: 65
Views: 31953

This discussion seems to have drifted from metric drill sets to metric vs imperial fasteners. Internet threads tend to do that... "Hey Rocky, watch me pull a rabbit out of my ha - " [rrAARRR] Metric threads are an abomination. Apparently as long as they're dimensioned in metric units, the...
by TRX
Fri Oct 05, 2018 10:57 pm
Forum: Lathes
Topic: lapping internal taper?
Replies: 20
Views: 15777

It worked, but it was very slow. It also risked introducing runout. I'd think you'd have to work pretty hard to get any detectable runout. My concern would be introducing low (high?) spots that would reduce the grip on the tool. On the other hand, if your socket is buggered and the proper MT taper ...
by TRX
Fri Oct 05, 2018 10:49 pm
Forum: Milling Machines
Topic: Morse taper end mills
Replies: 7
Views: 7153

Morse taper end mills

So, I'm flipping through my 1940s "Audel's Machinist and Tool Maker's Handy Book", and starting on page 702 there are some pictures and discussion of... tang drive Morse taper end mills. There's a picture of a two-flute end mill marked "P&W". There was a picture of a tang dri...
by TRX
Fri Oct 05, 2018 7:55 am
Forum: Lathes
Topic: lapping internal taper?
Replies: 20
Views: 15777

I was looking at the lapping section in my 1940s Audel's machinists manual and found a comment that taper laps were sometimes made, but they recommended against their use. They didn't say why, though. I also found a comment from someone who had a tailstock with a badly damaged socket. He cut the tan...
by TRX
Sun Sep 30, 2018 1:19 pm
Forum: General Discussion
Topic: metric drill set explained?
Replies: 65
Views: 31953

Re: metric drill set explained?

So that'd be 60 drills for the 1-6mm set and 40 for the other one? I'll look for Dormer, then.

I'll see if anything turns up for "100 piece set." What I keep getting from web searches are 13pc 1 to 13mm sets with 1mm steps and some 20pc sets with a few random x.5mm sizes tossed in.
by TRX
Sun Sep 30, 2018 12:27 pm
Forum: General Discussion
Topic: metric drill set explained?
Replies: 65
Views: 31953

metric drill set explained?

So now that I'm using metric drills more often now I thought I'd look into a metric drill set. Perhaps I'm missing something obvious... In a complete "Imperial" drill set there are fractional, number, and letter drills. These are actually three separate standards, lumped together because e...
by TRX
Fri Sep 28, 2018 7:01 am
Forum: Lathes
Topic: lapping internal taper?
Replies: 20
Views: 15777

Re: lapping internal taper?

Well, does the finish of the internal taper even matter, as long as the collet isn't grunchy when you pull it in?
by TRX
Fri Sep 28, 2018 7:00 am
Forum: Milling Machines
Topic: tooling plate
Replies: 8
Views: 8182

tooling plate

Having seen tooling plates in pictures and marveling at how convenient they appeared to be, I decided I should have one too. Looking at the situation further... what do you do about chips?! I haven't seen any pictures of plates with plugs in the unused holes. And if you raised the plate up on stando...