Tried shearing a bolt with IR's 2235TiMAX today

[Farmall450]

Neither my 2135 PTi nor the new 2235TiMAX would bust one of these suckers...15/16" head...minor diameter is just over 1/2 in thick (see image).

I set this up with a piece of RR track that has a hole through it...I used washers on either side, and held the bolt with a combination wrench.

I'm kind of surprised the 2235 TiMAX wouldn't bust these...I'm not sure of the grade but apparently they're pretty tough.

Granted that is over 1/2 an inch of solid steel.

More to come,
Farmall450

 

[Buckgnarly]

Why the hell would you expect any impact to shear an unrusted, unused, unweakened 1/2 bolt?.....

 

[Farmall450]

Why the hell would you expect any impact to shear an unrusted, unused, unweakened 1/2 bolt?.....

They're both used, old by the looks of it.
I got suggestions to try that out in a previous thread...I had a pair of these, used this to give me an idea of sizes.

I shouldn't say I'm surprised it didn't shear it, rather, I'm surprised it didn't inflict a little more damage the the 2135 PTi (bolt "A").

The 2235TiMAX did put a small bend in "B" though. Pretty impressive on IR's part.

 

[bobcatdan]

The things people think these new "wonder" impacts can do is funny sometimes. When will you stop playing with tinker toys and get a 3/4".

 

[Wakefield]

Old style Sears Craftsman lawnmowers had 15/16 nut on end of crankshaft turned down to (I believe) 5/8" nominal diameter stud (SAE Fine thread?) I had been in the habit of torquing mine to 80 ft. lb. but saw where a professional said to not go over 65 ft. lb.
is bigger than car lug nut studs but probably no stronger than grade one or even less-malleable iron?

if that was grade 8 the torque capacity would probably be way up there-300 ft. lb. +?

 

[Farmall450]

Old style Sears Craftsman lawnmowers had 15/16 nut on end of crankshaft turned down to (I believe) 5/8" nominal diameter stud (SAE Fine thread?) I had been in the habit of torquing mine to 80 ft. lb. but saw where a professional said to not go over 65 ft. lb.
is bigger than car lug nut studs but probably no stronger than grade one or even less-malleable iron?

if that was grade 8 the torque capacity would probably be way up there-300 ft. lb. +?

This is coarse thread, I figured it was untreated/mild and the threads would give away fairly easily.

I guess to just spin a blade it really doesn't need to be that strong.

 

[Marlin]

Keep in mind both of those impacts are reverse biased, so the torque in reverse is greater. Perhaps if you had left-handed bolts...

 

[Farmall450]

Keep in mind both of those impacts are reverse biased, so the torque in reverse is greater. Perhaps if you had left-handed bolts...

I was planning on mentioning this in my review.
For the record, both impacts effortlessly spun off the bolts they'd tightened.

 

[shampoop]

try greasing the threads

 

[Wakefield]

For the same SAE nominal diameter I think the "fine" has a thicker minor diameter than the "course" thread

I wonder-is the stud/bolt more likely to break because of stretch or is it torsion/twist that kills it? For instance a capscrew going into a blind threaded hole that isn't deep enough so that the screw bottoms out without clamping its washer-does it break at less torque applied than if the bolt had a proper hole that allowed it to clamp its washer?

 

[redwrench60]

The things people think these new "wonder" impacts can do is funny sometimes. When will you stop playing with tinker toys and get a 3/4".

Well, I would get one but at least at my shop none of our air hoses, reels or fittings are sized for 3/4" drive tools. I've tried a few over the years on our system but they suffer badly. A hot rod 1/2" impact out does it. I usually find myself needing big power in a tight area or find myself working overhead a lot and a 3/4 would **** for that.

 

[Farmall450]

Well, I would get one but at least at my shop none of our air hoses, reels or fittings are sized for 3/4" drive tools. I've tried a few over the years on our system but they suffer badly. A hot rod 1/2" impact out does it. I usually find myself needing big power in a tight area or find myself working overhead a lot and a 3/4 would **** for that.

+1...unfortunately even the shops that do require breaking out a separate air hose, and often only have one fitting...which is, of course, too far away for the bigger hose to reach!

For the same SAE nominal diameter I think the "fine" has a thicker minor diameter than the "course" thread

I wonder-is the stud/bolt more likely to break because of stretch or is it torsion/twist that kills it? For instance a capscrew going into a blind threaded hole that isn't deep enough so that the screw bottoms out without clamping its washer-does it break at less torque applied than if the bolt had a proper hole that allowed it to clamp its washer?

The thread is also stronger as well. I always thought it was "stretch" myself.

 

[pete379]

The things people think these new "wonder" impacts can do is funny sometimes. When will you stop playing with tinker toys and get a 3/4".

I usually use a IR 2145 (3/4) on 5/8 grade 5 bolts in my truck frame, and I have stripped the threads tightening on occasion !
pete

 

[bobcatdan]

Well, I would get one but at least at my shop none of our air hoses, reels or fittings are sized for 3/4" drive tools. I've tried a few over the years on our system but they suffer badly. A hot rod 1/2" impact out does it. I usually find myself needing big power in a tight area or find myself working overhead a lot and a 3/4 would **** for that.

I have always ran my 3/4" impact which is a Mac rebadged of an IR plastic body on 3/8" line and it still smoke my mg725.

 

[chris142]

try an earthquake for fun

 

[arz71]

try an earthquake for fun

Would you have a tremor before the earthquake???

 

[Fcvapor05]

For the same SAE nominal diameter I think the "fine" has a thicker minor diameter than the "course" thread

I wonder-is the stud/bolt more likely to break because of stretch or is it torsion/twist that kills it? For instance a capscrew going into a blind threaded hole that isn't deep enough so that the screw bottoms out without clamping its washer-does it break at less torque applied than if the bolt had a proper hole that allowed it to clamp its washer?

Fasteners will almost always fail from tension unless they are damaged.

 

[KinzeMech]

The things people think these new "wonder" impacts can do is funny sometimes. When will you stop playing with tinker toys and get a 3/4".

Put that french tickler away, and get a 1".


I don't think I'd want a 1/2" impact that could twist off what the OP is describing as apparently a 5/8" bolt (what else has a 15/16 hex head?). I think if my daily use 1/2" impact could twist off bolts that large it would be costing me more time in broken fasteners than it would be saving me on stubborn ones.


A while back when I scored a deal on a used 1" impact wrench, I did just for shits and grins put it on a new 5/8" grade 5 bolt that was already tight, put it on forward, and pulled the trigger. It twisted that bolt right off within about 5 beats of the hammer.

If one is going to improvise a rudimentary torque testing procedure by seeing how large of a bolt can be twisted off by an impact wrench, what size should it be able to break?

I would expect a good 1/2" impact to be able to break 3/8" bolts easily if overtightened. If it's breaking bolts larger than that, it may very be "too powerful for it's own good".