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Info on GRAYSON TOOL CO threading tool

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staninlowerAL
10+ Years
10+ Years
Posts: 4974
Joined: Fri Oct 29, 2010 11:34 pm
Zip Code: 36558
Tractors Owned: Cubs: (3)'49's, (1 is for parts), (1)'57 IH Cub LoBoy w/FH, (2)154 Number Series Loboys, (1 is for parts), '76 Longstripe w/FH, Mowers: C-22, Bush Hog 412, Pennington 59, Woods RM42CF, Woods 42, assorted FCub plows, planters, discs, etc. OTHERS: '49 AC B & Ind. Sickle mower, '61 AC D12 Ser 2, '52 8N, '56 Ferguson 35 Deluxe, '47 & '49 Avery V, '53 MM BG (offset), '51 JD M (regular), '56 JD 420C, with Blade and fire plow, '85 JD 850 (Yanmar) w/72" belly mower, '76? Yanmar 2TR15 1500 & Bush Hog SQ42S-2 mower, '78? FORD Dexta, '86 FORD LGT14D & 48" Mower, (2)Cub Cadets & Mowers (MTD), (4) Sears Surburban's, other MTD mowers, Jeeps & other misc. "treasures"
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Location: AL (Southwest)

Info on GRAYSON TOOL CO threading tool

Postby staninlowerAL » Tue Oct 27, 2015 1:21 pm

Looking for information on a Grayson Tool Co. INC GT1300 threading tool. The handle end is stamped GT 1300, GRAYSON TOOL CO INC Hastings Nebraska USA. Several sizes ranging from 5/8 -18 to 1 1/4-12 SAE (fine threads). It looks to be a very old thread cleaner or re-threading tool and is about 16 inches long.
Stan in LA (lower AL)
USAF & Reserves, Reg ARMY, ARMY NG (AL)

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mozer71
5+ Years
5+ Years
Posts: 579
Joined: Wed Apr 04, 2018 1:33 pm
Zip Code: 22650

Re: Info on GRAYSON TOOL CO threading tool

Postby mozer71 » Wed Jul 18, 2018 5:40 pm

Hello from years ago. Your Grayson INC GT1300 threading tool sounds very interesting. We all probably have a few different automatic die heads for pipe. It was fascinating to understand how they worked (way before the net) . The dies cut out a path for the succeeding teeth and each chaser was shaped/ground in union with the actual thread pitch and pitch diameter. There is only a range where this works because the helix/ cutting angle changes with diameter. But there are newer expanding taps which I don't have a handle on yet.


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