Search found 154 matches

by TRX
Sun Sep 30, 2018 1:19 pm
Forum: General Discussion
Topic: metric drill set explained?
Replies: 65
Views: 12879

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: 12879

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 enough of t...
by TRX
Fri Sep 28, 2018 7:01 am
Forum: Lathes
Topic: lapping internal taper?
Replies: 20
Views: 7003

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: 3525

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...
by TRX
Fri Sep 28, 2018 6:53 am
Forum: General Discussion
Topic: Twist drill prices
Replies: 33
Views: 7766

Re: Twist drill prices

Ancient Rome once taxed sunlight! [see: "A Golden Thread : 2500 Years of Solar Architecture and Technology" by Ken Butti and John Perlin, 1980] Americans *do* have a dislike for taxes. It was one of the official reasons we aren't part of Britain any more. And when the New Bosses turned out to be gre...
by TRX
Thu Sep 27, 2018 2:47 pm
Forum: Lathes
Topic: lapping internal taper?
Replies: 20
Views: 7003

Re: lapping internal taper?

Well, how important is the ground finish, then? How about honing? Could I just make a few strokes with a ball hone and call it good? Or will any finish do as long as it's not too rough?
by TRX
Thu Sep 27, 2018 8:09 am
Forum: Lathes
Topic: lapping internal taper?
Replies: 20
Views: 7003

lapping internal taper?

I need to make an internal taper to take a collet. According to my reference books, this type of thing should be hardened, then ground to final size on OD and ID. I don't have a toolpost grinder. I could fake it pretty good on the OD with some flat stock and sandpaper, but the inside has me stalled....
by TRX
Thu Sep 20, 2018 7:21 pm
Forum: General Discussion
Topic: cleaning taper sockets
Replies: 2
Views: 1231

cleaning taper sockets

I've seen the "orange juicer" tools for cleaning big ISO tapers, and some for Morse tapers. But is there any tool that is useful for cleaning R8 and 5C tapers? I used to blow them out with compressed air, but the new neighbors and the compressor aren't compatible. Bottle brush? I can't see into the ...
by TRX
Wed Sep 19, 2018 9:57 pm
Forum: General Discussion
Topic: Gage blocks
Replies: 54
Views: 9510

The one place they have high value ... is in calibration. After my comment earlier in the thread, I realized I have more than just calipers and micrometers to measure. I now have several cheap import DROs and a collection of old/worn equipment and cheap import equipment, who knows what errors there...
by TRX
Sun Sep 16, 2018 9:35 am
Forum: Lathes
Topic: foot brake
Replies: 7
Views: 2559

foot brake

Looking at some of the import 12x36 lathes, one of the variations I've seen is that some come with a "foot brake"; a bar near the floor that looks like the pedal on a metal shear.

There are many things I've wished for when running a lathe, but "foot brake" isn't among them.

What am I missing?
by TRX
Sun Sep 16, 2018 9:28 am
Forum: General Discussion
Topic: spot drill angles
Replies: 8
Views: 1685

For longer drills, I don't have enough quill travel to reach the workpiece with a center drill. edit: I hate it when someone posts while I'm typing in a reply! [tries for Squint of Irritated Disapproval, winds up with nervous tic on eyelid...] I didn't know center drills came that long; all mine are...
by TRX
Sun Sep 16, 2018 8:28 am
Forum: General Discussion
Topic: spot drill angles
Replies: 8
Views: 1685

spot drill angles

So, I decide I need some spot drills, and go off looking for them online. Okay. They are available with 120 degree points, 90 degree points, and some don't say, but from the pictures look like maybe 80 degrees. I looked through my collection of old machining books, and none of them even *mention* sp...