How do you torque a nut to 350 ft.lbs?

[Jacobson]

I see 3/4" torque wrenches only seem to go to 300 lbs.

 

[manwithtools]

One ft. lbs. at a time.....

Seriously, it may take a torque multiplier like this:

http://www.northerntool.com/shop/tools/product_200623947_200623947

 

[larry_g]

One option is to use a torque multiplier. Another way is to divide the 350 by your weight and that will give you the lever length of the handle needed on the bar that you stand on. Example, you weigh 100 lbs, 350/100= 3.5. The handle length would be 3.5 FEET long.

lg
no neat sig line

 

[Ruger_556]

Stop looking at HF torque wrenches.

My Proto goes to 600 ft-lbs http://www.tacomascrew.com/Proto-6020AB-Foot-Pound-Torque-Wrenches

 

[Strouty]

My 3/4" torque wrench goes to 500 or more foot pounds, it is an older proto, should not be that hard to find one like it.

I only paid $50 for mine and it was tested on the Snap On truck for accuracy, it read 10 pounds high at 250 ft pounds, but when you get into the 500 ft pound range, what is a couple of percent between friends.

 

[Mr. T]

One option is to use a torque multiplier. Another way is to divide the 350 by your weight and that will give you the lever length of the handle needed on the bar that you stand on. Example, you weigh 100 lbs, 350/100= 3.5. The handle length would be 3.5 FEET long.

lg
no neat sig line

I'd use this method if it means buying a $500 torque wrench and socket will be avoided for a one time use. Just remember to hold on to something when you're standing there.

But if it's a critical fastener that could lead to catastrophic damage to persons or equipment if done improperly it might be best to spend the money or farm this one out.

 

[dutchgray]

Norbar makes 3/4" drive torque wrenches that go over 1000 lbf.ft
Buy a decent torque wrench.

 

[Mr. T]

One ft. lbs. at a time.....

Seriously, it may take a torque multiplier like this:

http://www.northerntool.com/shop/tools/product_200623947_200623947

It takes a really high torque value and some specialized stuff to get make a torque multiplier worth the investment.

Because they use planetary gearing there is a loss in the force through the transmission. Because of this you need to measure the output torque of the multiplier to have any confidence that it is correct. Very spendy if you go that route.

 

[stioc]

One foot cheater bar with my ex sitting on the end of it.

 

[bobcatdan]

4 to 1 torque multipler and a 250 ft lbs 1/2" torque wrench along with simple math.

 

[PJNJ]

With this -
http://www.amazon.com/dp/B00PX16Z4Q/?tag=atomicindus08-20

Goes up to 600 ft. lbs.. Probably one of the better "cheaper" 3/4 torque wrenches that go over 300 ft. lbs.

Probably cheaper than a decent torque multiplier. And no math skills required.

BTW - what are you doing that needs 350 ft. lbs. of torque to tighten?

 

[joe_padavano]

I see 3/4" torque wrenches only seem to go to 300 lbs.

Funny, I've just had to do this today for the pinion nut on my truck's 14 bolt axle. I also have a 600 ft-lb, 3/4 drive torque wrench. I think I paid $65 for mine at a swap meet.

Yeah, it's about this long...

 

[Nor'Easter]

If you want cheap... hanging scale and bar that is the length of your choice.

Mo=F*d.

 

[royesses]

I had a Snap-on 600 ft/lb split beam torque wrench for CAT cylinder head bolts at 330 ft/lb.

 

[Wes J]

My KD torque wrench goes to 600 ft-lbs.

Proto, Wright, and others make 1" drive torque wrenches up to 1,200 ft-lbs.

 

[R-Savage]

My snapon 3/4 dial torque wrench goes to 600 ft lb.

 

[Olafur]

http://www.amazon.com/dp/B009GLITFW/?tag=atomicindus08-20

No problemo.

 

[LXCam]

Just torque it to 175ftlbs twice........duh .

 

[Moose-LandTran]

Just torque it to 175ftlbs twice........duh .

 

[yhprum]

you can use your bodyweight and an appropriately sized cheater bar.
https://www.physicsforums.com/threads/torque-wrench-tool-calculation.432352/

 

[Bruce57]

Proto still makes a 3/4 torque wrench that goes to 600 ft./lbs. but it's pretty pricey, $880 on Amazon.

 

[WhiffySpark]

If you're talking about an axle nut I use a 2235 and a finger. If youre talking about head bolts. Yeah there's no cheap way

 

[Jacobson]

Cool idea about standing on the bar. I guess you just hope the bar is sort of close to level when it reaches fully torqued. For a 1 time use, this is what I'll try first.

 

[scissorman]

My 3/4" Snap-on wrench goes 200-600 FT/LBS.

 

[JJThrasher]

60-600ft-lbs

https://store.snapon.com/Standard-M...d-Ratchet-60-600-ft-lb-3-4-drive-P642512.aspx

 

[WhiffySpark]

What are you trying to torque

 

[Know Wosad]

Stop looking at HF torque wrenches.

My Proto goes to 600 ft-lbs http://www.tacomascrew.com/Proto-6020AB-Foot-Pound-Torque-Wrenches

I have to laugh. I just left an other thread with the same problem.

 

[lakeroadster]

How do you torque a nut to 350 ft.lbs?

A 1 foot long wrench, with a 350 lb Gorilla hanging on it.

 

[toplessHO]

175# person 2 ft bar
pretty simple
you can use a longer bar but torque is calculated from middle of point of contact
this means if your using body weight and both hands are on the bar,feet off the ground,
the calculated length should be middle between both hands


and do not bounce

 

[foghorn1966]

Rent a 3/4" torque wrench. Any good rental place should be able to help you if the fastener you are working on needs to be torqued.

 

[Mr. T]

175# person 2 ft bar
pretty simple

The not so simple part is applying this method in a kinetic friction scenario... Unless you're a gymnast.

 

[slidehammer]

You can get a Precision Instruments 3/4", 500 lb-ft dial type torque wrench for around $300 new. They are the OEM for the Snap-On Torqometer line.

 

[larry_g]

Cool idea about standing on the bar. I guess you just hope the bar is sort of close to level when it reaches fully torqued. For a 1 time use, this is what I'll try first.

If you are not at 90* the your error will be the cosine of the angle your at.

it's perty simple math.

lg
no neat sig line

 

[Dick in Wisconsin]

Just torque it to 175ftlbs twice........duh .

You gotta be careful with that kind of stuff. Some of the guys on here will actually believe you!

 

[bczygan]

Have one of Tampa's ladies sit on it!

 

[brownbagg]

use a 4ft torque wrench

 

[ishiboo]

Easy.

3" long ratchet parallel with the ground with 1400 lbs on it.

 

[LXCam]

Easy.

3" long tool with 1400 lbs on it.

So your suggesting Tampa and the girls join in too eh.

 

[LXCam]

You gotta be careful with that kind of stuff. Some of the guys on here will actually believe you!

Patiently waiting

 

[Avplayer]

http://www.amazon.com/dp/B000I1O9OE/?tag=atomicindus08-20
All my torque wrenches are CDI. Owned by Snap On