Search found 1486 matches

by pete
Sat Oct 06, 2018 1:00 am
Forum: Milling Machines
Topic: Morse taper end mills
Replies: 7
Views: 375

Re: Morse taper end mills

The P&W might? have been Pratt and Whitney as the manufacturer (maybe). But they made a lot of machine tools, cutting tools and some high end well thought of metrology equipment as well. I'm not real enthused with MT's that use a drawbar even though they work fine. There's just better tapers than a ...
by pete
Sat Oct 06, 2018 12:31 am
Forum: Lathes
Topic: Lathe setup question(s)
Replies: 23
Views: 1047

Re: Lathe setup question(s)

A MT test bar only works if the female taper is in pristine condition with zero dings, rust or debris in it. Without that the test bar can indicate the headstock as being out when it may not be. With the right conditions and some bad luck it could even indicate the headstock as being correct when it...
by pete
Fri Sep 28, 2018 3:39 pm
Forum: Milling Machines
Topic: Spindle collet grub screw
Replies: 17
Views: 777

Re: Spindle collet grub screw

I'd certainly agree Harold, a normal edge finder doesn't need to be adjusted to run true. These Haimers would only be highly accurate if they are. Adjusting them is done a bit like a 4 jaw independant so it's possible to get them under a couple of 10ths.
by pete
Fri Sep 28, 2018 2:06 pm
Forum: Milling Machines
Topic: Spindle collet grub screw
Replies: 17
Views: 777

Re: Spindle collet grub screw

The only real use I've found for that set screw is it indexes anything put into the spindle taper to the same place each time. My 3D Haimer edge finder uses a dedicated 3/4" end mill holder and the edge finders C/L gets indicated in and adjusted until it's dead on to the spindles C/L. So it's helpfu...
by pete
Fri Sep 28, 2018 11:36 am
Forum: General Discussion
Topic: index head
Replies: 53
Views: 2301

Re: index head

My personal opinion is it's probably a good idea to pull equipment like this apart for a detailed cleaning and relube. What I found on even Taiwan equipment is there's always a bit of dust,dirt, and maybe a bit of grinding dust since there built to a price point that doesn't leave any extra for the ...
by pete
Thu Sep 27, 2018 7:20 pm
Forum: General Discussion
Topic: Tap guides
Replies: 1
Views: 226

Re: Tap guides

Good idea Earl, when I fially get around to building one I'll now need to make two. So you've just doubled my work. :-)
by pete
Thu Sep 27, 2018 7:13 pm
Forum: General Discussion
Topic: index head
Replies: 53
Views: 2301

Re: index head

If you did want to take it apart for a proper cleaning and relube? There's at least 2 Youtube videos showing the disassembly and reassembly for the B & S heads these were copied from. It's not quite as straight forward as it seems. BasementShopGuy and Keith Rucker did the two videos about it that I ...
by pete
Mon Sep 24, 2018 6:49 pm
Forum: Lathes
Topic: Look what followed me home today
Replies: 3
Views: 388

Re: Look what followed me home today

Nice score. :-)
by pete
Sun Sep 23, 2018 6:28 pm
Forum: Milling Machines
Topic: Vise opinion
Replies: 7
Views: 608

Re: Vise opinion

The integral rear fixed jaw is a good sign since it's more cost effective and easier to bolt that jaw in place. So my guess it wasn't a poorly made vise when new. And even 30 years ago Japan was making some excellent tooling. I'd guess that flaking isn't just to fool the buyer. Any wear on the movin...
by pete
Sat Sep 22, 2018 3:42 pm
Forum: General Discussion
Topic: Gage blocks
Replies: 54
Views: 2892

Re: Gage blocks

Within average limits then there's pretty accurate calculations that can be used to adjust for size if the material type and temperature is known so when things cool down or warm up to the more standard 68f/20c specification they should be quite accurate. I can only go by what I've read about it sin...
by pete
Fri Sep 21, 2018 7:03 pm
Forum: Milling Machines
Topic: Tightening a vise
Replies: 14
Views: 744

Re: Tightening a vise

A standard machinist's apprenticeship is 4 years. That's with working full time at it and learning from hopefully some other highly talented journeymen machinist's in the same shop with long years already put in. Then you go back to school every year for more testing and book learning with some prac...
by pete
Fri Sep 21, 2018 5:29 pm
Forum: Milling Machines
Topic: Tightening a vise
Replies: 14
Views: 744

Re: Tightening a vise

Reliable torque numbers such as with a proper torque wrench also gets you repeatability on multiple parts of the same type. Lot's of places doing fairly accurate milled parts seem to use that method. Even a Kurts fixed jaw can flex enough to change a referance coordinate on tight tollerance parts. W...