ok, stupid ? -how do torque multipliers work?

[Piper]

So I need to torque my new lift arms on my Mohawk lift to ~1000 ft-lbs. I'm looking at torque multipiers like this one. http://www.princessauto.com/tools/hand-tools/sockets-accessories/8248692-torque-multiplier-wrench-set?keyword=torque+multiplier&pop=0 I'm likely going to rent one but what I don't understand is how they work.

How is this tool used?

Piper

 

[gofastman]

Its a planetary gearset, there is a drive portion, (output) driven, (input) and held (handle on the multiplyer) part
They are usually a 4:1 ratio meaning if you turn the input 4 times with 10 ft lbs of force, the output will move 1 turn with 40 foot lbs of force.

 

[jonny o]

The one I used was set up like a planetary transmission. Think gears.

 

[Mike83]

Its a planetary gearset, there is a drive portion, (output) driven, (input) and held (handle on the multiplyer) part
They are usually a 4:1 ratio meaning if you turn the input 4 times with 10 ft lbs of force, the output will move 1 turn with 40 foot lbs of force.

Fixed.

Make sure you can brace the reaction bar on something real solid.

Keep in mind 15-20% torque loss through the tool as well.

 

[gofastman]

Fixed.

Make sure you can brace the reaction bar on something real solid.

Keep in mind 15-20% torque loss through the tool as well.

how do you figure? where does it go? if you say friction i will **** my pants!

 

[Mike83]

how do you figure? where does it go? if you say friction i will **** my pants!

Friction

http://www.srtorque.com/stttm.html

Read page 4
http://www1.snapon.com/V2/Groups/cmsINDUKau/Torque/Torque_multipliers.pdf

 

[bentt]

A torque multiplier is a tiny transmission (gear reduction).

 

[Major Ramifications]

1,000 foot pounds, no problem. For a small fee, I will come over there and tighten it up with my bulging biceps.

 

[krusty the clown]

i'm not even going to touch this one..........every time we talk torque wrenches it goes to hell.

 

[walrus]

1000ftlbs, thats got to be quite a tough socket. I'd say 10 feet of pipe will get ya there without any expensive tools

 

[Charles (in GA)]

I suppose I could come up with my Norbar 1100 lb/ft torque wrench and torque it for you.

Just send me a ticket.............. next summer when it is not so cold.

Charles

 

[rickd.]

I suppose I could come up with my Norbar 1100 lb/ft torque wrench and torque it for you.

show off

 

[Joe69]

I could torque it twice with my 600 lb/ft SO torque wrench

Joe

 

[nate379]

I had 5 or 6 1000 ft/lb torque wrenches I gave away a while back. If I had an extra one now I'd mail it out to you.

http://buy1.snapon.com/catalog/item...1&group_ID=954&store=snapon-store&dir=catalog

We use torque multipliers at work and there is no loss factored into what input it needs for the desired output. This is on bombs where we torque little screws to 4-5 in/lbs too.

http://www.fas.org/man/dod-101/sys/smart/gbu-10.htm

 

[tatra]

elves.....................