Electric Induction can heat up a 6inch stud under 5 min!!! Because of the integrated chiller, the tube is cold to the touch in less than30 seconds. The old fashond way used to be done with cal rods. (like a electric stove) With Cal rods the process takes much much longer, and is unsafe to people around them.
The hand tightened nuts w small torquing bolts in the big nut (cant remember the co. name) are pretty good too. Torqued up and loosened easily w only a small impact or long handled ratchet.
My guys and I heated a lot of turbine bolts with a heater made from stainless tubing, mixing chamber, air, and oxy acetelene. Bolts (studs) might be 4 feet long, 6" diameter, and have 5/8 hole thru them lengthwise. Sometimes only a few taps with a hammer on the "slugging wrench" got them loose.
Big turbines have studs holding the cases together. The stud is hollow, you heat it inside, it grows lengthwise, then you unscrew the nuts. To tighten, you install a nut, drop the stud thru the casing, put the other nut on the bottom and run it up snug, mark it. Heat the stud, turn the nut the prescribed amount like 5/8 turn, let it cool. Easier than 6000 foot lbs on a wrench!
Electric Induction can heat up a 6inch stud under 5 min!!! Because of the integrated chiller, the tube is cold to the touch in less than30 seconds. The old fashond way used to be done with cal rods. (like a electric stove) With Cal rods the process takes much much longer, and is unsafe to people around them.
WWWNIBTORQUECOM 4 years ago
The hand tightened nuts w small torquing bolts in the big nut (cant remember the co. name) are pretty good too. Torqued up and loosened easily w only a small impact or long handled ratchet.
apeppink 4 years ago
My guys and I heated a lot of turbine bolts with a heater made from stainless tubing, mixing chamber, air, and oxy acetelene. Bolts (studs) might be 4 feet long, 6" diameter, and have 5/8 hole thru them lengthwise. Sometimes only a few taps with a hammer on the "slugging wrench" got them loose.
kimmer6 4 years ago
Heating up a bolt with electric induction will grow the bolt and release the clap load, this will allow the nut to come off easy!!!
WWWNIBTORQUECOM 4 years ago
how, what, hu? I am very slot on what your doing, cutting a bolt?
tallhunter1 4 years ago
Big turbines have studs holding the cases together. The stud is hollow, you heat it inside, it grows lengthwise, then you unscrew the nuts. To tighten, you install a nut, drop the stud thru the casing, put the other nut on the bottom and run it up snug, mark it. Heat the stud, turn the nut the prescribed amount like 5/8 turn, let it cool. Easier than 6000 foot lbs on a wrench!
kimmer6 4 years ago
Much easier.
apeppink 4 years ago