Sawzall + Grade 8 bolts = lots of dead blades

[perp]

Cut off wheel is much faster and cheaper than sawzall blades when they will reach. Almost must use a cut off wheel or torch on Grade 8 bolts, axle U bolts too. same thing when cutting a good weld long ways, kills sawzall blades.

 

[wildbilzrydn]

You could also use a little cutting fluid on the blade, like wd-40 or tap-matic or air tool oil. Overheating a saw blade causes it to lose hardness and after that your done. Take your time, ignore the smoke and cut using a slow speed. This also works on drill bits and end mills and etc.

 

[79k20350]

The last two posts had better suggestions than most all combined. To cut hard steel you must use cutting fluid, wd 40 sucks, it burns off real quick, but a tapping/ cutting fluid is the only way to go. the keep the blade cool and itll last 5 times longer and youll cut twice as fast. also for hardend stuf the only way to go if you dont have a torch is a grinder and cutoff wheel, fast and easy.

 

[beater_k20]

Rigid Gold blades. i cut up a whole K10 with 1 blade.

 

[jekbrown]

just get the grinder... even cheap HF cut off wheels will cut through a 1/2" bolt without to much difficulty.

j