Differance between ft lbs in a air impact gun?
#1
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Differance between ft lbs in a air impact gun?
I like working on my own vehicles at home and looking to buy a air impact gun, I found 2 that I like, one has 950 ft lbs torque and the other 1190 ft lbs torque. I basically need it to remove tires, calibers, and removing my mower blades which are "brutal" to get off. Is there that much of breaking power between the 950 and 1190? There is a difference of $60 between the two, would I be better off getting the bigger one in case it's ever needed? Thanks...
#2
Is there that much of breaking power between the 950 and 1190?
Actually the compressor is probably your limiting factor, a small pancake compressor simply will not deliver as much air as a big 2 stage 60 gallon unit.
Personally I dont like them, a bit too brutal and really should not be used to reinstall parts.
I cringe every time I'm at a repair shop and see them use guns to reinstall wheel lug nuts!
#3
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I bought my cheap harbor freight impact about 40 yrs ago. At that time I knew nothing about impacts but at less than $20 theirs was affordable. It only has 250 lbs of torque but for the most part does ok. Occasionally I'll need a breaker bar to loosen a stubborn nut/bolt. If it ever tears up I'll buy a better one.
#4
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I doubt you will ever come across anything requiring 1000 ft lbs to loosen. Remember you provide the resistance to prevent the air wrench from spinning around the item you are tightening/loosening. Look at torque tables in any auto service manual. I doubt any go above 300 ft lbs.
Also as others have pointed out, higher loosening torques on air wrenches require higher air output (cfm) at pressure from the compressor or the loosening torque decreases as the cfm or pressure decreases. High cfm at high pressure makes for an expensive compressor.
Also as others have pointed out, higher loosening torques on air wrenches require higher air output (cfm) at pressure from the compressor or the loosening torque decreases as the cfm or pressure decreases. High cfm at high pressure makes for an expensive compressor.
marksr
voted this post useful.
#5
I doubt any go above 300 ft lbs.
I would agree, those higher torques with an air gun can take your arm off!