Search found 59 matches

by heavyg603
Tue May 23, 2017 9:13 am
Forum: Lathes
Topic: Threading logic check
Replies: 35
Views: 20088

Re: Threading logic check

I very much appreciate everyone's input. It's been very educational for me and discovered some new approaches in the process. For clarity, figured I'd post a pic of one of my threading tools. I do use an insert one (don't have the number off the top of my head). I've always thought it was a sharp v...
by heavyg603
Tue May 23, 2017 5:59 am
Forum: Lathes
Topic: Threading logic check
Replies: 35
Views: 20088

Re: Threading logic check

I very much appreciate everyone's input. It's been very educational for me and discovered some new approaches in the process. For clarity, figured I'd post a pic of one of my threading tools. I do use an insert one (don't have the number off the top of my head). I've always thought it was a sharp v ...
by heavyg603
Mon May 22, 2017 4:30 pm
Forum: Lathes
Topic: Threading logic check
Replies: 35
Views: 20088

Re: Threading logic check

That is awesome thank you . What tool is that ?
by heavyg603
Mon May 22, 2017 3:48 pm
Forum: Lathes
Topic: Threading logic check
Replies: 35
Views: 20088

Re: Threading logic check

Data in the Handbook should be based on a 1/8p flat at root for internal thread major diameter. Hmm. This could be a challenge. Wish I had a set of calipers with the right anvils to measure this to the root. All Ive seen so far just support external threads Calipers? You've already lost the battle....
by heavyg603
Mon May 22, 2017 3:17 pm
Forum: Lathes
Topic: Threading logic check
Replies: 35
Views: 20088

Re: Threading logic check

GlennW wrote:Data in the Handbook should be based on a 1/8p flat at root for internal thread major diameter.
Hmm. This could be a challenge. Wish I had a set of calipers with the right anvils to measure this to the root. All Ive seen so far just support external threads
by heavyg603
Mon May 22, 2017 2:43 pm
Forum: Lathes
Topic: Threading logic check
Replies: 35
Views: 20088

Re: Threading logic check

You are neglecting the fact that you are working with a sharp V tool. The proper major diameter is calculated using a 1/8p flat, (which is what the calculators are doing) not a sharp V, so your major diameter as cut will be larger. Also keep in mind that the chart above reflects COMPOUND infeed whi...
by heavyg603
Mon May 22, 2017 2:23 pm
Forum: Lathes
Topic: Threading logic check
Replies: 35
Views: 20088

Re: Threading logic check

That's why I went the calculator route, none of the charts fit the sizes exactly. Was using this tool http://theoreticalmachinist.com/Threads_UnifiedImperial.aspx I have only measured the depth of thread on my DRO so far. Original ID was with a set of internal calipers. I really need to get somethin...
by heavyg603
Mon May 22, 2017 1:44 pm
Forum: Lathes
Topic: Threading logic check
Replies: 35
Views: 20088

Threading logic check

I thought I Understood this but I'm seeing some vastly different data in different calculators so figured I'd lay it out. I have some thick walled tubing I need to internally thread. Its ID is 1.320 I want to create a 20tpi thread. When I look at my handy lathe threading chart (this is the classic o...
by heavyg603
Tue May 16, 2017 12:56 pm
Forum: 3-in-1 Metalworking Machines
Topic: Midas 1220 LTD axis lock issue
Replies: 6
Views: 11390

Re: Midas 1220 LTD axis lock issue

Just an update on this. Adjusting the gibs seemed to help. Can't see why it helped to be honest but hey cant argue with success :)
by heavyg603
Tue Apr 18, 2017 9:03 am
Forum: 3-in-1 Metalworking Machines
Topic: Midas 1220 LTD axis lock issue
Replies: 6
Views: 11390

Re: Midas 1220 LTD axis lock issue

Thanks Bill

Gary
by heavyg603
Sun Apr 16, 2017 9:22 pm
Forum: 3-in-1 Metalworking Machines
Topic: Midas 1220 LTD axis lock issue
Replies: 6
Views: 11390

Re: Midas 1220 LTD axis lock issue

Wow no one has seen this ? Looks like a call to Smithy is in order then.......
by heavyg603
Tue Apr 11, 2017 11:47 am
Forum: General Discussion
Topic: Please help me get a different insert for this set
Replies: 3
Views: 1843

Re: Please help me get a different insert for this set

warmstrong1955 wrote:Do a bit of measuring, and go here.
(Everything you wanted to know about carbide insert ID, but were afraid to ask)

http://www.carbidedepot.com/formulas-insert-d.htm

A TCMT32.51 is probably what you want.

I have about ten 1/2" tool holders, and the TCMT is what they use.

Bill
Thanks!