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#1
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Odd, to me, thread gauges
I won in an auction for some modern ring gauges for threads a couple
older gauges that were rectangular in shape. I check all the used thread gauges I buy using the three wire method for plug gauges and a ball with an indicator, surface plate and gauge blocks for ring type. I never bother with checking the minor or major diameter sizes because these surfaces should never experience wear. I do measure them to use as a reference diameter in order to check the pitch on ring gauges but don't check the size against what it should be according to Machinery's Handbok. But the other day I was cutting some 3/4-10 threads and the modern ring gauge threaded on no problem. For a whim I tried the old rectangular gauge and it would not thread on. I had checked the pitch diameter on this gauge so I thought it was good. Checking the gauge again, this time checking the minor diameter, I find that the minor diameter is way too small. Looking more carefully at the gauge I see it is stamped 3/4-10 U.S.S. and looking online I find that U.S.S. stands for United States Standard. This standard preceded the UN standard. I have never cut threads to the U.S.S. standard except maybe by accident. The flat or radius it allows in the vee of the thread is too small for the proper thread strength. I have two of these gauges so I am going to hone the minor diameter on each so that they agree with the UN standard. If they weren't in such good shape I would just toss them. Eric |
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#3
Posted to rec.crafts.metalworking
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Odd, to me, thread gauges
"Larry Jaques" wrote in message
news  On Mon, 16 Nov 2015 09:31:31 -0800, wrote: I won in an auction for some modern ring gauges for threads a couple older gauges that were rectangular in shape. I check all the used thread gauges I buy using the three wire method for plug gauges and a ball with an indicator, surface plate and gauge blocks for ring type. I never bother with checking the minor or major diameter sizes because these surfaces should never experience wear. I do measure them to use as a reference diameter in order to check the pitch on ring gauges but don't check the size against what it should be according to Machinery's Handbok. But the other day I was cutting some 3/4-10 threads and the modern ring gauge threaded on no problem. For a whim I tried the old rectangular gauge and it would not thread on. I had checked the pitch diameter on this gauge so I thought it was good. Checking the gauge again, this time checking the minor diameter, I find that the minor diameter is way too small. Looking more carefully at the gauge I see it is stamped 3/4-10 U.S.S. and looking online I find that U.S.S. stands for United States Standard. This standard I remember seeing USS many years back. But all my tools from Searz, MAC, SnapOff, and Cornwell were all built to current standards, UNC and UNF, so I never had a problem. USS, UNC, UNF, Metric, ACME, Whitworth...what a blast they are! sigh Early US metric, old cheap Japanese metric, and new cheap Chinese metric can be fun, too. preceded the UN standard. I have never cut threads to the U.S.S. standard except maybe by accident. The flat or radius it allows in the vee of the thread is too small for the proper thread strength. I have two of these gauges so I am going to hone the minor diameter on each so that they agree with the UN standard. If they weren't in such good shape I would just toss them. Just be sure you stamp them NC/NF as necessary, so it doesn't confuse you (or later inheritors) at a later date. Has anyone here used UNEF? (extra fine. I just discovered it today.) The thread on an F connector is 3/8-32 UNEF. Lamp fittings are 1/8 or 1/4 NPS, straight (untapered) pipe thread. Old gas fittings were 3/8". http://lighting.about.com/od/Fixtures/ss/A-Hickey.htm -jsw |
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#4
Posted to rec.crafts.metalworking
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Odd, to me, thread gauges
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#5
Posted to rec.crafts.metalworking
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Odd, to me, thread gauges
On Mon, 16 Nov 2015 17:55:50 -0500, "Jim Wilkins"
wrote: "Larry Jaques" wrote in message news On Mon, 16 Nov 2015 09:31:31 -0800, wrote: I won in an auction for some modern ring gauges for threads a couple older gauges that were rectangular in shape. I check all the used thread gauges I buy using the three wire method for plug gauges and a ball with an indicator, surface plate and gauge blocks for ring type. I never bother with checking the minor or major diameter sizes because these surfaces should never experience wear. I do measure them to use as a reference diameter in order to check the pitch on ring gauges but don't check the size against what it should be according to Machinery's Handbok. But the other day I was cutting some 3/4-10 threads and the modern ring gauge threaded on no problem. For a whim I tried the old rectangular gauge and it would not thread on. I had checked the pitch diameter on this gauge so I thought it was good. Checking the gauge again, this time checking the minor diameter, I find that the minor diameter is way too small. Looking more carefully at the gauge I see it is stamped 3/4-10 U.S.S. and looking online I find that U.S.S. stands for United States Standard. This standard I remember seeing USS many years back. But all my tools from Searz, MAC, SnapOff, and Cornwell were all built to current standards, UNC and UNF, so I never had a problem. USS, UNC, UNF, Metric, ACME, Whitworth...what a blast they are! sigh Early US metric, old cheap Japanese metric, and new cheap Chinese metric can be fun, too. preceded the UN standard. I have never cut threads to the U.S.S. standard except maybe by accident. The flat or radius it allows in the vee of the thread is too small for the proper thread strength. I have two of these gauges so I am going to hone the minor diameter on each so that they agree with the UN standard. If they weren't in such good shape I would just toss them. Just be sure you stamp them NC/NF as necessary, so it doesn't confuse you (or later inheritors) at a later date. Has anyone here used UNEF? (extra fine. I just discovered it today.) The thread on an F connector is 3/8-32 UNEF. Lamp fittings are 1/8 or 1/4 NPS, straight (untapered) pipe thread. Old gas fittings were 3/8". http://lighting.about.com/od/Fixtures/ss/A-Hickey.htm -jsw And yall think we have thread problems... http://www.enginehistory.org/british_fasteners.shtml http://www.enginehistory.org/BSFaste...eference_3.pdf As I recall..there are some 83 or so British thread forms and types Gunner |
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#6
Posted to rec.crafts.metalworking
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Odd, to me, thread gauges
On Mon, 16 Nov 2015 17:55:50 -0500, "Jim Wilkins"
wrote: "Larry Jaques" wrote in message news On Mon, 16 Nov 2015 09:31:31 -0800, wrote: I won in an auction for some modern ring gauges for threads a couple older gauges that were rectangular in shape. I check all the used thread gauges I buy using the three wire method for plug gauges and a ball with an indicator, surface plate and gauge blocks for ring type. I never bother with checking the minor or major diameter sizes because these surfaces should never experience wear. I do measure them to use as a reference diameter in order to check the pitch on ring gauges but don't check the size against what it should be according to Machinery's Handbok. But the other day I was cutting some 3/4-10 threads and the modern ring gauge threaded on no problem. For a whim I tried the old rectangular gauge and it would not thread on. I had checked the pitch diameter on this gauge so I thought it was good. Checking the gauge again, this time checking the minor diameter, I find that the minor diameter is way too small. Looking more carefully at the gauge I see it is stamped 3/4-10 U.S.S. and looking online I find that U.S.S. stands for United States Standard. This standard I remember seeing USS many years back. But all my tools from Searz, MAC, SnapOff, and Cornwell were all built to current standards, UNC and UNF, so I never had a problem. USS, UNC, UNF, Metric, ACME, Whitworth...what a blast they are! sigh Early US metric, old cheap Japanese metric, and new cheap Chinese metric can be fun, too. preceded the UN standard. I have never cut threads to the U.S.S. standard except maybe by accident. The flat or radius it allows in the vee of the thread is too small for the proper thread strength. I have two of these gauges so I am going to hone the minor diameter on each so that they agree with the UN standard. If they weren't in such good shape I would just toss them. Just be sure you stamp them NC/NF as necessary, so it doesn't confuse you (or later inheritors) at a later date. Has anyone here used UNEF? (extra fine. I just discovered it today.) The thread on an F connector is 3/8-32 UNEF. Yeah, those li'l effers -are- pretty fine, aren't they? Lamp fittings are 1/8 or 1/4 NPS, straight (untapered) pipe thread. Old gas fittings were 3/8". http://lighting.about.com/od/Fixtures/ss/A-Hickey.htm I'll be damned! I'll bet this is where the term "doohickey" came from. -- The most powerful factors in the world are clear ideas in the minds of energetic men of good will. -- J. Arthur Thomson |
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#7
Posted to rec.crafts.metalworking
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Odd, to me, thread gauges
On Mon, 16 Nov 2015 23:32:13 -0800, Gunner Asch
wrote: --snip-- And yall think we have thread problems... http://www.enginehistory.org/british_fasteners.shtml http://www.enginehistory.org/BSFaste...eference_3.pdf Cool story. Merlins used SU carbs? sigh As I recall..there are some 83 or so British thread forms and types Until the Great Unifier, Whitworth, wot? ------- This just in: Beretta 25 cal Jet-Fire I cannot believe that this small caliber pistol protected this lady. Read..and take heed ! South Carolina woman stops alligator attack with a small Beretta pistol This is a story of self-control and marksmanship by a brave, cool-headed woman with a small pistol against a fierce predator! What is the smallest caliber that you would trust to protect yourself? A Beretta Jet-Fire testimonial... Here is her story in her own words: "While out walking along the edge of a lake on Hilton Head Island in an alligator infested area with my soon to be ex-husband discussing property settlement and other divorce issues, we were surprised by a huge 12-ft. alligator which suddenly emerged from the murky water and began charging us with its large jaws wide open. "She must have been protecting her nest because she was extremely aggressive. If I had not had my little Beretta Jetfire .25 caliber pistol with me, I would not be here today! "Just one shot to my estranged husband's knee cap was all it took. He hit the ground hard ! The gator got him easily and I was able to escape by just walking away at a brisk pace. It's one of the best pistols in my collection! Plus the amount I saved in lawyer’s fees was really incredible." -- The most powerful factors in the world are clear ideas in the minds of energetic men of good will. -- J. Arthur Thomson |
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#8
Posted to rec.crafts.metalworking
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Odd, to me, thread gauges
On Mon, 16 Nov 2015 12:56:09 -0800, Larry Jaques
wrote: On Mon, 16 Nov 2015 09:31:31 -0800, wrote: I won in an auction for some modern ring gauges for threads a couple older gauges that were rectangular in shape. I check all the used thread gauges I buy using the three wire method for plug gauges and a ball with an indicator, surface plate and gauge blocks for ring type. I never bother with checking the minor or major diameter sizes because these surfaces should never experience wear. I do measure them to use as a reference diameter in order to check the pitch on ring gauges but don't check the size against what it should be according to Machinery's Handbok. But the other day I was cutting some 3/4-10 threads and the modern ring gauge threaded on no problem. For a whim I tried the old rectangular gauge and it would not thread on. I had checked the pitch diameter on this gauge so I thought it was good. Checking the gauge again, this time checking the minor diameter, I find that the minor diameter is way too small. Looking more carefully at the gauge I see it is stamped 3/4-10 U.S.S. and looking online I find that U.S.S. stands for United States Standard. This standard I remember seeing USS many years back. But all my tools from Searz, MAC, SnapOff, and Cornwell were all built to current standards, UNC and UNF, so I never had a problem. USS, UNC, UNF, Metric, ACME, Whitworth...what a blast they are! sigh Early US metric, old cheap Japanese metric, and new cheap Chinese metric can be fun, too. preceded the UN standard. I have never cut threads to the U.S.S. standard except maybe by accident. The flat or radius it allows in the vee of the thread is too small for the proper thread strength. I have two of these gauges so I am going to hone the minor diameter on each so that they agree with the UN standard. If they weren't in such good shape I would just toss them. Just be sure you stamp them NC/NF as necessary, so it doesn't confuse you (or later inheritors) at a later date. Has anyone here used UNEF? (extra fine. I just discovered it today.) I wonder what Czech tractors use. (this just in) http://www.gizmag.com/pininfarina-de...tractor/40409/ After I hone the ID on each gauge they will be meeting the UN standard so I will then obliterate the U.S.S. stamping and mark them UN. |
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#9
Posted to rec.crafts.metalworking
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Odd, to me, thread gauges
"Larry Jaques" wrote in message
news On Mon, 16 Nov 2015 09:31:31 -0800, wrote: I won in an auction for some modern ring gauges for threads a couple older gauges that were rectangular in shape. I check all the used thread gauges I buy using the three wire method for plug gauges and a ball with an indicator, surface plate and gauge blocks for ring type. I never bother with checking the minor or major diameter sizes because these surfaces should never experience wear. I do measure them to use as a reference diameter in order to check the pitch on ring gauges but don't check the size against what it should be according to Machinery's Handbok. But the other day I was cutting some 3/4-10 threads and the modern ring gauge threaded on no problem. For a whim I tried the old rectangular gauge and it would not thread on. I had checked the pitch diameter on this gauge so I thought it was good. Checking the gauge again, this time checking the minor diameter, I find that the minor diameter is way too small. Looking more carefully at the gauge I see it is stamped 3/4-10 U.S.S. and looking online I find that U.S.S. stands for United States Standard. This standard I remember seeing USS many years back. But all my tools from Searz, MAC, SnapOff, and Cornwell were all built to current standards, UNC and UNF, so I never had a problem. USS, UNC, UNF, Metric, ACME, Whitworth...what a blast they are! sigh Early US metric, old cheap Japanese metric, and new cheap Chinese metric can be fun, too. New cheap Chinese metric... egad! I recently was working on re-retrofitting a CNC mill based off a Chinese import, and found almost none of the socket head fasteners were a good fit for either metric of franctional hex keys. I've got fairly complete sets. For one particular screw I went threw every wrench on the drawer that was close, and none fit right. As a small screw you can't fudge much either. It will just round out. Finally I picked up a cheap folding set in the back of the drawer that I had marked as bad with a paint marker some 20+ years ago because not a single hex wrench in it fit anything properly. It had perfect fits keys for almost every fastener on this mill. What's interesting is the mill came with a set of tools for service which included hex keys. Not a single one of them was a perfect fit for any fastner on the machine either. |
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#10
Posted to rec.crafts.metalworking
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Odd, to me, thread gauges
On Tue, 17 Nov 2015 08:45:33 -0800, wrote:
On Mon, 16 Nov 2015 12:56:09 -0800, Larry Jaques wrote: On Mon, 16 Nov 2015 09:31:31 -0800, wrote: I won in an auction for some modern ring gauges for threads a couple older gauges that were rectangular in shape. I check all the used thread gauges I buy using the three wire method for plug gauges and a ball with an indicator, surface plate and gauge blocks for ring type. I never bother with checking the minor or major diameter sizes because these surfaces should never experience wear. I do measure them to use as a reference diameter in order to check the pitch on ring gauges but don't check the size against what it should be according to Machinery's Handbok. But the other day I was cutting some 3/4-10 threads and the modern ring gauge threaded on no problem. For a whim I tried the old rectangular gauge and it would not thread on. I had checked the pitch diameter on this gauge so I thought it was good. Checking the gauge again, this time checking the minor diameter, I find that the minor diameter is way too small. Looking more carefully at the gauge I see it is stamped 3/4-10 U.S.S. and looking online I find that U.S.S. stands for United States Standard. This standard I remember seeing USS many years back. But all my tools from Searz, MAC, SnapOff, and Cornwell were all built to current standards, UNC and UNF, so I never had a problem. USS, UNC, UNF, Metric, ACME, Whitworth...what a blast they are! sigh Early US metric, old cheap Japanese metric, and new cheap Chinese metric can be fun, too. preceded the UN standard. I have never cut threads to the U.S.S. standard except maybe by accident. The flat or radius it allows in the vee of the thread is too small for the proper thread strength. I have two of these gauges so I am going to hone the minor diameter on each so that they agree with the UN standard. If they weren't in such good shape I would just toss them. Just be sure you stamp them NC/NF as necessary, so it doesn't confuse you (or later inheritors) at a later date. Has anyone here used UNEF? (extra fine. I just discovered it today.) I wonder what Czech tractors use. (this just in) http://www.gizmag.com/pininfarina-de...tractor/40409/ After I hone the ID on each gauge they will be meeting the UN standard so I will then obliterate the U.S.S. stamping and mark them UN. You'll adjust the ID and tooth radius/depth to meet Unified stds? Lotta work, that.  -- The most powerful factors in the world are clear ideas in the minds of energetic men of good will. -- J. Arthur Thomson |
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#11
Posted to rec.crafts.metalworking
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Odd, to me, thread gauges
On Tue, 17 Nov 2015 17:21:59 -0800, Larry Jaques
wrote: On Tue, 17 Nov 2015 08:45:33 -0800, wrote: On Mon, 16 Nov 2015 12:56:09 -0800, Larry Jaques wrote: On Mon, 16 Nov 2015 09:31:31 -0800, wrote: I won in an auction for some modern ring gauges for threads a couple older gauges that were rectangular in shape. I check all the used thread gauges I buy using the three wire method for plug gauges and a ball with an indicator, surface plate and gauge blocks for ring type. I never bother with checking the minor or major diameter sizes because these surfaces should never experience wear. I do measure them to use as a reference diameter in order to check the pitch on ring gauges but don't check the size against what it should be according to Machinery's Handbok. But the other day I was cutting some 3/4-10 threads and the modern ring gauge threaded on no problem. For a whim I tried the old rectangular gauge and it would not thread on. I had checked the pitch diameter on this gauge so I thought it was good. Checking the gauge again, this time checking the minor diameter, I find that the minor diameter is way too small. Looking more carefully at the gauge I see it is stamped 3/4-10 U.S.S. and looking online I find that U.S.S. stands for United States Standard. This standard I remember seeing USS many years back. But all my tools from Searz, MAC, SnapOff, and Cornwell were all built to current standards, UNC and UNF, so I never had a problem. USS, UNC, UNF, Metric, ACME, Whitworth...what a blast they are! sigh Early US metric, old cheap Japanese metric, and new cheap Chinese metric can be fun, too. preceded the UN standard. I have never cut threads to the U.S.S. standard except maybe by accident. The flat or radius it allows in the vee of the thread is too small for the proper thread strength. I have two of these gauges so I am going to hone the minor diameter on each so that they agree with the UN standard. If they weren't in such good shape I would just toss them. Just be sure you stamp them NC/NF as necessary, so it doesn't confuse you (or later inheritors) at a later date. Has anyone here used UNEF? (extra fine. I just discovered it today.) I wonder what Czech tractors use. (this just in) http://www.gizmag.com/pininfarina-de...tractor/40409/ After I hone the ID on each gauge they will be meeting the UN standard so I will then obliterate the U.S.S. stamping and mark them UN. You'll adjust the ID and tooth radius/depth to meet Unified stds? Lotta work, that. Thread gauges don't measure the radius at the thread root or crest, only the pitch. The gauge has a flat at the thread crest. The corners of the flat correspond to the points where a radius at the thread root is tangent to the sides of the thread. A UN thread can have either a flat or a radius at the thread root. So all I need to do is lap the thread I.D. Eric |
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#12
Posted to rec.crafts.metalworking
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Odd, to me, thread gauges
On Thu, 19 Nov 2015 10:27:55 -0800, wrote:
On Tue, 17 Nov 2015 17:21:59 -0800, Larry Jaques wrote: On Tue, 17 Nov 2015 08:45:33 -0800, wrote: On Mon, 16 Nov 2015 12:56:09 -0800, Larry Jaques wrote: On Mon, 16 Nov 2015 09:31:31 -0800, wrote: I won in an auction for some modern ring gauges for threads a couple older gauges that were rectangular in shape. I check all the used thread gauges I buy using the three wire method for plug gauges and a ball with an indicator, surface plate and gauge blocks for ring type. I never bother with checking the minor or major diameter sizes because these surfaces should never experience wear. I do measure them to use as a reference diameter in order to check the pitch on ring gauges but don't check the size against what it should be according to Machinery's Handbok. But the other day I was cutting some 3/4-10 threads and the modern ring gauge threaded on no problem. For a whim I tried the old rectangular gauge and it would not thread on. I had checked the pitch diameter on this gauge so I thought it was good. Checking the gauge again, this time checking the minor diameter, I find that the minor diameter is way too small. Looking more carefully at the gauge I see it is stamped 3/4-10 U.S.S. and looking online I find that U.S.S. stands for United States Standard. This standard I remember seeing USS many years back. But all my tools from Searz, MAC, SnapOff, and Cornwell were all built to current standards, UNC and UNF, so I never had a problem. USS, UNC, UNF, Metric, ACME, Whitworth...what a blast they are! sigh Early US metric, old cheap Japanese metric, and new cheap Chinese metric can be fun, too. preceded the UN standard. I have never cut threads to the U.S.S. standard except maybe by accident. The flat or radius it allows in the vee of the thread is too small for the proper thread strength. I have two of these gauges so I am going to hone the minor diameter on each so that they agree with the UN standard. If they weren't in such good shape I would just toss them. Just be sure you stamp them NC/NF as necessary, so it doesn't confuse you (or later inheritors) at a later date. Has anyone here used UNEF? (extra fine. I just discovered it today.) I wonder what Czech tractors use. (this just in) http://www.gizmag.com/pininfarina-de...tractor/40409/ After I hone the ID on each gauge they will be meeting the UN standard so I will then obliterate the U.S.S. stamping and mark them UN. You'll adjust the ID and tooth radius/depth to meet Unified stds? Lotta work, that. Thread gauges don't measure the radius at the thread root or crest, only the pitch. The gauge has a flat at the thread crest. The corners of the flat correspond to the points where a radius at the thread root is tangent to the sides of the thread. A UN thread can have either a flat or a radius at the thread root. So all I need to do is lap the thread I.D. Eric, you're right. I had lost the thread, evidently thinking along the lines of taps and dies, not gauges. -- The most powerful factors in the world are clear ideas in the minds of energetic men of good will. -- J. Arthur Thomson |
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