Rant about bolts

[He Man]

ericchang87 came by lastnight. we took his old wave rotors off his 620 to put on his new GT1000.
All the bolts came out nice and easilly except 1 of them. They were installed onto Carrozzeria wheels. Needless to say, i ended up snapping my bit on my impact gun (300ft/lbs). It wouldnt come out. It was about 4am. And i had no choice but to break out the mini torch, slotted it and try to knock it out. (oh yea it stripped too)

I didnt have any drill bits, but later im going to drill a hole through it and see if i can melt the locktite and go at it again.

Whoever replaced the original rotors used way to much locktite.
</rant>

[ducpainter]

ericchang87 came by lastnight. we took his old wave rotors off his 620 to put on his new GT1000.
All the bolts came out nice and easilly except 1 of them. They were installed onto Carrozzeria wheels. Needless to say, i ended up snapping my bit on my impact gun (300ft/lbs). It wouldnt come out. It was about 4am. And i had no choice but to break out the mini torch, slotted it and try to knock it out. (oh yea it stripped too)

I didnt have any drill bits, but later im going to drill a hole through it and see if i can melt the locktite and go at it again.

Whoever replaced the original rotors used way to much locktite.
</rant>

The amount of loctite doesn't affect the bond...just sayin'.

You need a quality hand hammer impact driver and a heat gun.

[DucHead]

The amount of loctite doesn't affect the bond...just sayin'.

You need a quality hand hammer impact driver and a heat gun.

+1 heat first, then hammer impact.

[He Man]

how is a hammer impact different from a hand impact?

and if u just dip a few threads vs the whole bolt in loctite it makes no difference?

[ducpainter]

how is a hammer impact different from a hand impact?

and if u just dip a few threads vs the whole bolt in loctite it makes no difference?

We're talking about something you hold in your hand and hit with a hammer. Not a pneumatic tool.

As you screw the fastener in the loctite spreads and coats all the threads. There's only so much clearance for loctite to fill regardless if you use 1 drop or the whole bottle.

[suzyj]

It may be more the type of loctite used was inappropriate.  I use 222 on everything up to M6, it's only M8/M10 fasteners where you should use 242.  I wouldn't be surprised if they used the permanent 262 (which is really only to anchor studs and whatnot) or something.

[He Man]

Sorry, i meant whats the difference between a hammer impact, and an air impact??

I always just give it one drop and let the fastenting spread itself, but i figure theres a difference between lightly coated bolt vs one that completely fills in the threads. I guess not!

[ducpainter]

Sorry, i meant whats the difference between a hammer impact, and an air impact??

I always just give it one drop and let the fastenting spread itself, but i figure theres a difference between lightly coated bolt vs one that completely fills in the threads. I guess not!

Hammer impact uses down force to break the bond with a twist to turn it. The air tool just twists and usually strips the head or breaks the bit.

Do the math...you're an engineering student. If you assume a 75% thread in a hole and 75% on the bolt how much volume is left? I'm guessing microns. It doesn't take much loctite to completely fill that.

[Porsche Monkey]

You don't need to be using a pneumatic impact for bolts of that size. Use heat and try to get some good quality extraction tools. The tool Nate is referring to is called an impact driver. You put your socket on the end and strike the other end with a hammer while twisting to the left.  As you strike it with the hammer it drives the bit into the screwhead and applies force to loosen the fastener. They are almost a necessity on hex head bolts that have been fastened overtight or with threadlock.

[Düb Lüv]

MAP gas(yellow tank) and hand ratchet always works perfect.

are you all using red loctite?

[He Man]

I never thought about it that way. Looks like im making a trip to the home depot.

[Popeye the Sailor]

For the record, in 17 years, only once have I ever needed a pneumatic impact to get a bolt off.


Use less brute force.

[Porsche Monkey]

MAP gas(yellow tank) and hand ratchet always works perfect.

are you all using red loctite?

Use blue locktite. Dont use red unless you want it to be permanent.

[He Man]

For the record, in 17 years, only once have I ever needed a pneumatic impact to get a bolt off.


Use less brute force.

i use it cause its easier. Its got 4 settings on it, and i generally leave it on 1, which is fairly mild IMO.


So for my service, should i go with 222 purple low strngth or 242 blue medium strength for all my bolts?

[ducpainter]

Use blue locktite. Dont use red unless you want it to be permanent.

I don't necessarily agree with that.

Red is not permanent, it just requires some heat to remove. There are fasteners on our bikes that require it.