Will this impact wrench be powerful enough?

Discussion in 'Lawn Mowing' started by TROTTMAN, Jun 22, 2005.


    TROTTMAN LawnSite Senior Member
    Messages: 397

    Here are the specifications (its a cheap electric version, but I ONLY need it for removing and installing blades):

    Wrench length: 11 5/8"
    Powerful 7 amp, 120V motor
    2100 RPM, 2400 BPM
    235 pounds of torque

    The socket size is 1/2" (pretty standard from what I have seen).

    Those are about the same numbers for torque I see on a lot of air impact wrenches of similiar value. I know it won't be as good, but I'm on a budget! Thanks y'all for any advice!

    And again, I know electric isn't as good, but should this get the blades off and on?
  2. Ric

    Ric LawnSite Fanatic
    Messages: 11,969


    I don't think it has enough power to make you happy. I have both a cheap and good impact. The 235 lb air impact wouldn't do the job for me so I got a 600 lb impact and it does ok.

    TROTTMAN LawnSite Senior Member
    Messages: 397

    So you don't think it will get the blade bolts off? If it can just get them loose thats good enough for me. I can't imagine the bolts require more torque than that, but maybe they do???

    Ususally stuff isn't tightened down much over 100lbft. Right?
  4. Ric

    Ric LawnSite Fanatic
    Messages: 11,969


    Blade rotate in the direction that tights the nuts. The 235 ft lbs Might be enough to break them loose some of the time. But carry a big Breaker bar with you. You will need it on occasion. I found my 235 ft lb air impact to be worthless most of the time.

    TROTTMAN LawnSite Senior Member
    Messages: 397

    Hmmm okay... where can I find one of these breaker bars and how much do they usually run?
  6. Big Hoss

    Big Hoss LawnSite Member
    Messages: 57

    This impact has more than double the torque to take off and put the blades on my equipment . It should be enough to get you started but I would be concerned about its durability.

    Big Hoss
  7. timinkc

    timinkc LawnSite Member
    Messages: 217

    dude, if you don't know what a breaker bar is you're in serious trouble...
  8. SteveInMD

    SteveInMD LawnSite Member
    Messages: 23

    Craftsman makes them. Take the time to find a 3 - 4 foot length of steel pipe that fits tightly around the handle too. I also use an impact wrench socket because they are much tougher than the standard ones.
  9. Precision

    Precision LawnSite Silver Member
    Messages: 2,995


    that impact wrench will be plenty to put them on. But getting them off, I would guess at least one time in 4 it will do absolutely nothing towards lossening the bolt.

    I have one (pnuematic) that is rated at 1000 ft/# and I had trouble with a bolt the other day. Took 10 seconds to break it loose.

    Get a good cfm air compressor that runs on 110 volt. Lowes has a 30 gallon 6 hp for under $300. Then get a decent air driven impact wrench at $150. Very good investment and you now have a whole list of new tools to ask for at birthdays and Christmas. #1 should be a portable air tank for fixing tires while working.
  10. South Florida Lawns

    South Florida Lawns LawnSite Platinum Member
    from usa
    Messages: 4,784

    I have an old craftsman electric and it has plenty of power. It even took off the factory tight bolts off the blades with out a problem. Now i just use a breaker bar and some muscle and skip the impact wrench all together. I am looking at the battery powered models for when I'm out on site.

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