O/T Thread inspection

[TheePres]

Looking for software to help calculate Three-Wire Thread measuring system on 1.875-12 UNJ thread..any leads??

[John Summers]

You could just draw the thread profiles (top and bottom) in MC, and float in the wires. Since you're using the 3-wire method, the bottom thread can just be a mirror of the top thread.

[Tom Dorgan from American Precision]

L.S. Starret used to have a free software I think that did this for you. I still have the floppies in a box somewere for 8 years ago. There is a guy on here from Starret so maybe he could help you.

[Charlie Pierson]

I'll check into it, Right now our thread guru is on the phone w/ a customer.

[Charlie Pierson]

TheePres,

check your mail

[Tom Dorgan from American Precision]

So Charlie, what exactly do you do at Starrett? Almost nothing in my machinist's box except Starrett.

[SLJ]

Do a search for ME Consultant. Someone here offered it to the group. Has thread calculations, feeds and speeds, and conversions of several sorts. Works fine.

Just looked it up. On the ftp site in unspecified folders_uploads

[Charlie Pierson]

Tommy,

Great to hear you appreciate our efforts.

 

As for what I do.

First of all I program and troubleshoot repairs for CNC machines

at present:

7 Tsugami Horizontals

2 Kitamura Verticals

3 Nomura Swiss Lathes

2 Warner Swazey Lathes

2 Bridgeport CNC surface Grinders

1 Trumpf Laser

1 Mazak Laser

4 Traub Verticals

2 Drillmate Verticals

1 Normac CNC Grinding Wheel Profiler ( in Mt. Airy NC)

2 custom made grinders w/ xxxxor controls

6 rule etching machines w/ Fanuc6M and / or Bostomatic SPC2 controls

EIA/ISO help w/ 3 Mazak Vertical Machining Centers and 1 Mazak Multiplex Lathe

 

The other 3 programmers here have about the same load.

 

Secondly, I design + make fixturing for those machines (using KeyCreator , the successor to Cadkey)

 

Thirdly, I do methods engineering work

 

And last but not least , I do whatever else my boss tells me to do.

 

and yourself ??

[Charlie Pierson]

theepres,

I ran the software and , using .049 dia wires and a class 2 thread , it said the measurement over the wires should be 1.893839 to 1.887639

 

cp

[Carl Vallance]

We use a program called ThreadTech.

http://www.threadcheck.com/threadtech_software.htm

If you do a lot of threads it's well worth the cost.

Here's a sample of the results

 

..............OSBORN PRODUCTS INC..............

Pitch diameter tolerances and other data for EXTERNAL

THREADS, class 1A, 2A, 3A, series UNC, UNF, UNEF,

UN, UNJ, UNS.

 

Number of starts............................... 1

Threads per inch............................... 12.0000

Decimal lead is................................ 0.08333

 

1.875-12 UNJ-2A EXTERNAL THREAD

 

The major diameter is......................from 1.8732

to 1.8618

 

The pitch diameter is......................from 1.8191

to 1.8131

 

The minor diameter is......................from 1.7770

to 1.7660

 

Best wire size is.............................. 0.04811

Constant is.................................... 0.072169

Maximum radius at root is...................... 0.01500

Minimum radius at root is...................... 0.01250

Measurement over wires is..................from 1.891269

to 1.885269

Pitch diameter tolerance for 2A is............. 0.0060

Allowance for class 2A is...................... 0.0018

The helix angle is............................. 0.83542

Or if you prefer 0 Degrees 50 Minutes 7 Seconds

These are COMPUTER values......................

Run date is 03-25-05

[JOVATO8]

TheePres

Somewhere I have a floppy that I got from a tool guy it was free and legal.

It calculates measurement using any wires and also recommends best wires to use and all

thread info you might need.I am sure you can also calculate pipe threads.All data can be printed.

You can also input any special thread size,pitch that you want.I was already using Gage Master when I got this.Works great.

Let me know if you want this and how to get it to you.

 

God Bless All

Joe

[TheePres]

Thank you all,

I had initially downloaded a "free" trial of Machinist Calculator, But when attempted to run, says "trial period has expired", not until today did consider installing on other computer..Seems to give similar results as what you show here, but no allowances for class of thread.

Charlie, did not recieve e-mail..would you please resend.