Lets talk torque wrench


Technical information and Q&A applicable to all years and models of Goldwings
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pidjones
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Motorcycle: 2006 GL1800A
1978 GL1000 w/'75 engine (project)

Re: Lets talk torque wrench

Post by pidjones » Tue Sep 10, 2019 6:01 am



tamathumper wrote:
Mon Sep 09, 2019 9:38 pm
There's not much to calibrating a torque wrench.

Lock it in a vice, hang a known weight a foot out along the handle (or do the math if the handle is longer)... Voila.
I hang a plastic bucket at one foot, add sand until it clicks, weigh the bucket. Do this at several settings. Good for 1/4" and 3/8", not so much for 1/2". Remember that the Pittsburgh wrenches are never lower than the major increment (5 ft-lb on a 3/8, 10 ft-lb on a 1/2"), so know that is what they start from. The barrel markings can confuse, so I always count going up. This will keep you from over-torquing lower torque (~12-25 ft-lb) fasteners.



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Scooter363y
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Re: Lets talk torque wrench

Post by Scooter363y » Tue Sep 10, 2019 9:11 pm

I grew up working on cars (street and race) and motorcycles. This hands on experience definitely helped out when I went to school working on a mechanical engineering degree.

Bolts are strange fasteners. In order to work correctly they have to "stretch" slightly but not overly so. In order to do this we use an inclined plane (threads) in order to load the bolt to its elastic range loading. Thread pitch,bolt material, and lubricant all make the proper torque an elusive number to come up with. Then figure in the base material, iron,cast iron,steel, and most importantly to us aluminum! Consult your factory service manual for the right specs for your bike.

Bolt fastener facts:
Most bolt torque specs are based on clean dry hole threads and a clean lightly oiled bolt
A bolt threaded into a base material only needs 5 threads to develop full strength
The top thread carries a majority of the load the 5th thread carries about 15% of the load
A con rod bolt (the most stressed bolt) is measured for length to check for proper "stretch"

Ride safe and keep your nuts-bolts tight
Scooter

RS23V0G
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Re: Lets talk torque wrench

Post by RS23V0G » Sat Sep 14, 2019 8:02 am

C-dub wrote:
Sun Aug 18, 2019 8:51 pm
Since I am also in the market for some torque wrenches I checked these HF wrenches out. This cracked me up. There's a warning from Cali.
WARNING. This product can expose you to chemicals including Diisononyl Phthalate (“DINP”), which is known to the State of California to cause cancer.
Is there anything that Cali doesn't think will cause cancer?
I'm a materials buyer for Great Dane Trailers and we had to start posting the Prop 65 decals on every trailer. Apparently trailers now cause Cancer. Wondering it it also makes all the cargo cancerous........

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tamathumper
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Re: Lets talk torque wrench

Post by tamathumper » Sat Sep 14, 2019 10:45 am

I worked at a chemical company for 23 years making plastic additives, plasticizers, tackifiers, and thousands of different resin compounds. DINP is a plasticizer that probably makes the rubber/plastic on the handle of the wrench more pliable.

I'm no chemist, and I don't particularly like chemicals, but I learned a lot about the politics of how things get on these lists, and you probably would not be surprised to learn that the environmental branch of the government is about as sensible and efficient as the others.

I did a Google search, but I couldn't find out how many torque wrenches you'd have to eat to increase your risk of cancer.
'03 GL1800A | Porsche 968 | Ford F-150 | Skidoo GSX (2) | Seadoo GTI (2) | Suzuki ATV (2)
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pocketchange
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Motorcycle: 1994 GL1500 SE

Re: Lets talk torque wrench

Post by pocketchange » Thu Oct 24, 2019 7:21 pm

Technology marches on,
HF has an EXCELLENT torque wrench for about $100.
Kemtac(sp), also has another tongue wrench, that is EXCELLENT too.. for $35.. ****buy it****!
(open the head & add some grease)
I've got a PROTO that does the same job & if I remember correctly, cost me an arm and leg..
it has more deviation % than the two at the beginning of this post..
PLEASE don't spend too much money on a torque wrench.. this ain't the 60s. pc

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Rambozo
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Re: Lets talk torque wrench

Post by Rambozo » Thu Oct 24, 2019 8:17 pm

tamathumper wrote:
Sat Sep 14, 2019 10:45 am
I did a Google search, but I couldn't find out how many torque wrenches you'd have to eat to increase your risk of cancer.
I had a coworker who got a head ache and dizzy spells from a torque wrench.

He forgot to number the main caps when taking apart an engine, and the boss hit him in the head with a torque wrench when he went to assemble that engine.

SouthernOutlaw
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Re: Lets talk torque wrench

Post by SouthernOutlaw » Fri Oct 25, 2019 9:07 pm

I guess I am another Harbor Freight fan. I have all three of there click type torque wrenches, and my hobby is rebuilding old farm equipment and tractors. Also, I do most of the auto work on a huge family inventory of autos of one type or another. These wrenches like all my tools get a workout, and are never treated with a lot of care. I have had the calibration checked on the wrenches 4 times in 12 years, and they have never had to be adjusted. Always within 3 to 4 %.

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saganaga
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Re: Lets talk torque wrench

Post by saganaga » Wed Oct 30, 2019 4:22 pm

I've had HF torque wrenches refuse to click. But the return policy is good.

OTOH, beam type torque wrenches have never failed me.

Ed Brock
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1998 1500 SE

Re: Lets talk torque wrench

Post by Ed Brock » Wed Nov 13, 2019 5:12 pm

I sure you already have what you need. But just thought I would put in my idea. Harbor Freight has some okay tools, but somethings should not be skimped on.
Now that I said that, It also depends on your level of knowledge. Most people can have a good close idea of torque, some not so at all. I think a good way to go, unless you are a tool nut like me, on a one time usage is to rent it.
I personal look at one time usage as an excuse to go see my Snap-on or Mac tool guy.
Good luck Ed

Ed Brock
Posts: 53
Joined: Wed Feb 27, 2019 11:45 am
Location: Oak Grove Or
Motorcycle: 1986 Suzuki Cavalcade GD
1998 1500 SE

Re: Lets talk torque wrench

Post by Ed Brock » Wed Nov 13, 2019 5:15 pm

Rambozo,
Good for the boss. Hope that person got the engine correct the first time. More important is I hope he learned something.
Ed



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