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Torque Multi

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3020MSS

03-29-2002 20:31:51




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Torque Multiplier..What is it and I take it that you just dont pick one of these up at nearest hardware store....




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Trucker

04-03-2002 21:38:13




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 Re: Torque Multi in reply to 3020MSS, 03-29-2002 20:31:51  
It was about 700 dollars from Snap On 15 years ago,I got one at an auction for 175.It has like a transmission,you put a 1/2 in drive rachet or breakover bar in the top and a 3/4 drive socket on the other side then get somebody to hold the bar on the torque multiplier,maybe need a cheater pipe,then for every 4 turns on top you get 1 turn on the bottom,I think there are some that turn 1 turn for 3 on top,so if you put 100 lbs of torque in the top,you get 400 lbs of torque out the bottom,but you loose 20% or more so its about 340 out the bottom.It gets real hard to hold the cheater torquing mains on a Cat.

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jim

03-29-2002 23:43:12




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 Re: Torque Multi in reply to 3020MSS, 03-29-2002 20:31:51  
it is device to multiply input torque. usually it will have female square drive input 1/2"-1" are common. this goes through planetary gear set and raises torque with gear set. gear ratio will run from 4 to 1 (common) to 20 to 1. output drive is bigger than input with square male. the one drawback to these tools is they reqire reaction bar, which is nothing more than a handle, to counteract torque reaction. this and overall size of unit can make difficult to use in some locations.

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Dell (WA)

03-30-2002 01:56:51




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 Re: Re: Torque Multi in reply to jim, 03-29-2002 23:43:12  
When I was a flight test instrumentation engineer at Boeing, I had to put some little accelerometers to measure vibration on the #1 bearing behind the big engine fan. The jet engine main shaft was about 12" dia and the fan hubnut was torqued to 4.2 FOOT/TONS. They used a 3-stage torque multiplier and took 'em 12 hrs of whining 1/2" air driven drill motor to tighten it. I was impressed..... ..Dell

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