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If you’re in pretty good shape, you can generate around 150 ft-lbs of torque with a reasonably-short wrench.  But what if you need more?  Stanley-Proto’s torque multipliers employ a three-stage planetary gear system to turn your measly 150 ft-lbs into a whopping 8,000 ft-lbs.  Holy crap, that’s a lot of grunt.

Think of this as a mechanical impact wrench without the wrench.  The gearing system stores up the energy you put in, then drops it out all at once.  A “three-position anti-backlash device” keeps the wrench from hammering your arms as hard as it’s hammering the (very large) fastener, and its input and output side accept 1-1/2″ sockets/drives.

What’s the down side, you ask?  Price.  We couldn’t even find pricing for the 8,000 ft-lb model (pictured), but this should give you an idea: the 5,000 ft-lb model runs $6,000.  (OK, Amazon actually has it for $5,923.50, but who’s counting?)  The J6202A (750 ft-lb) is more reasonable and a few bucks shy of $500.

But it sure is cool.

8,000 Ft-Lb Torque Multiplier [Stanley-Proto]
Street Pricing [Google Products]
Via Amazon [What’s this?]


6 Responses to Generate 8,000 Ft-Lbs Of Force With Proto’s Torque Multiplier

  1. Steve O says:

    Also try Armstrong tools:


  2. chs says:

    I can think of nothing but terrible and evil things to use this for. AND I WANT ONE!

  3. Eric M says:

    I had to change a fron wheel bearing on my 93 Bonneville, which required removing a 34mm axle retaining nut. To break it loose, I put a 3ft pipe on the end of the breaker bar and bounced on it. After cranking it off 1in of thread, the nut was warm, almost to the point of being hot.

  4. I’d be interested to see how this mechanism works internally, and how it compares to the Swench: http://toolmonger.com/2006/09/13/finds-swench-manual-impact-wrenches/

  5. Christian Weagle says:

    This looks a lot more like the gearhead-style torque multipliers than anything impact-related. Googling resulted in this page, which talks about them:


    I’ve previously seen other stuff on this guy’s site – it’s pretty great.

  6. Old Donn says:

    This thing scares the Hell out of me. I don’t have any 3/4 inch sockets for the same reason. Any fastener requiring that big a socket or that much torque is for someone else. Kind of like going rabbit hunting with a Bradley fighting vehicle.

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