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View Full Version : Lowest tightening torque on Nitrocat TC?


PoorOwner
10-31-2008, 07:02 PM
What is the lowest forward torque on the nitrocat TC (1000 ft lbs reverse torque)? I set the reg 110PSI no load (90 under load for most tools)

I let it hit very shortly, ping ping ping, next one, ping ping ping. (3 times or so)

I went over factory torque specs which is 85 ft lbs, more like 100.
So I had to redo it, barely shooting each lug on contact without impact there which is too loose. Ideally I wanted something like 50 ft lbs.

I don't really want to get a inline reg.. I suppose it will be a little easier to use after some wear. Cheap HF Torque stick?

csquared
10-31-2008, 07:21 PM
Never understood why impact guns had a tighten function. There is a tire retailer in my part of the country that always seems to tighten wheel lugs with an impact gun. When I was 16, and having them do the winter change-over for me, they pulled one of the rear studs through the brake drum. They were nice enough to fix it for me - for full price. Haven't been back since (12 years).

Poor - If you must, set that regualtor to 30 psi and do the rest properly. It isn't worth the damage of over torquing (or repeatedly over torquing). Just my $0.02.

gofastman
10-31-2008, 07:37 PM
Never understood why impact guns had a tighten function. There is a tire retailer in my part of the country that always seems to tighten wheel lugs with an impact gun. When I was 16, and having them do the winter change-over for me, they pulled one of the rear studs through the brake drum. They were nice enough to fix it for me - for full price. Haven't been back since (12 years).

Poor - If you must, set that regualtor to 30 psi and do the rest properly. It isn't worth the damage of over torquing (or repeatedly over torquing). Just my $0.02.

FWIW Snap On's torque sticks are design for an impact that lays down 250 ft lbs. to check calabration you use a beam type torque wrench and measure breakaway torque in the TIGHTINGING direction

PoorOwner
10-31-2008, 07:51 PM
I am just using the gun to get it on there, before lowering just enough for the tire to touch the ground, then I hand torque the wheels with a torque wrench.

autoace
10-31-2008, 08:02 PM
Never understood why impact guns had a tighten function. There is a tire retailer in my part of the country that always seems to tighten wheel lugs with an impact gun. When I was 16, and having them do the winter change-over for me, they pulled one of the rear studs through the brake drum. They were nice enough to fix it for me - for full price. Haven't been back since (12 years).

Poor - If you must, set that regualtor to 30 psi and do the rest properly. It isn't worth the damage of over torquing (or repeatedly over torquing). Just my $0.02.

For most steel rim cars I use a torque stick, torque of the driving impact shoud be 250 ft.lbs. for accurate torque. I actually use a cheap Campbell Haus. that puts out max. 250 for the torque sticks, used a torque wrench and were fairly accurate, close enough for most cars. Or use a under spec torque stick and finish with a hand torque wrench.

csquared
10-31-2008, 08:11 PM
I know, and I wasn't meaning to be judgemental. It is just a sore subject. That cost me a lot of money and they denied any responsibility.

From an engineering standpoint, repeated overtorquing leads to wheel damage, hub damage and fastener fatigue/failure. I'd just use a REALLY light touch on the trigger (or turn down the pressure). I use the socket on an extension and do it by hand, or sometimes use a speeder, but I'm also not on the clock.

BTW, after a quick look, it couldn't find the spec you are looking for. Sorry.

csquared
10-31-2008, 08:12 PM
Under spec and then use a torque wrench - that is a good suggestion.

autoace
10-31-2008, 08:28 PM
I know, and I wasn't meaning to be judgemental. It is just a sore subject. That cost me a lot of money and they denied any responsibility.

From an engineering standpoint, repeated overtorquing leads to wheel damage, hub damage and fastener fatigue/failure. I'd just use a REALLY light touch on the trigger (or turn down the pressure). I use the socket on an extension and do it by hand, or sometimes use a speeder, but I'm also not on the clock.

BTW, after a quick look, it couldn't find the spec you are looking for. Sorry.

I rarely put suspension components or anything else together with an impact gun, I use proper torque spec. which are critical for German and Swedish autos and all really important; since, the stretch of the bolt is critical. I'm an engine rebuilder and understand what you mean, I use an ARP stretch quage for rod bolts. Some techs. let their torque wrenches collect dust, that's unfortunate, I even torque spark plugs when possible. Ask me how many comebacks I get????that's right, goose egg, be sure to make sure you use a little oil on your lugs/bolt so the torque is more accurate. Anti-seize cakes and gets messy. Mix some 20w50 oil with slick50 and put it in a oil can(squirt dispenser) and makes sure the bolt etc. are clean(bench wire wheel)and use a few drops of above lube, wheel torque perfection.by the way ALWAYS HOLD THE BOLT AGAINST THE BENCH WIRE WHEEL WITH VISE GRIPS SO YOU DON'T WIRE WHEEL YOUR FINGERS OR CREATE A BOLT BULLET AND DING YOUR CAR.:bounce:

SteveU
10-31-2008, 08:43 PM
What is the lowest forward torque on the nitrocat TC (1000 ft lbs reverse torque)? I set the reg 110PSI no load (90 under load for most tools)

I let it hit very shortly, ping ping ping, next one, ping ping ping. (3 times or so)

I went over factory torque specs which is 85 ft lbs, more like 100.
So I had to redo it, barely shooting each lug on contact without impact there which is too loose. Ideally I wanted something like 50 ft lbs

Using the HVLP fittings at 90 psi I was somewhere north of 150 ft lbs when I went to loosen the bolt I was checking this on with my beam torque wrench. Pointer went full scale to 150 lbs & nut didn't budge so don't know exactly what it went to.