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RRich 04-21-2009 07:57 PM

A useful tip I heard today.
Allen Heads and Torx screws - they slip and round out often. They can be a real PITA!

Put a dab of Valve Grinding Compound on the head, then put the wrench in.
The compound's grit "bites" into the head like thousands of tiny barbs.

Haven't tried it, but it may help with a hex head that's somewhat rounded too.

PHX? 04-21-2009 08:05 PM

Wow, never would have thought of that... i'll have to try that.

jeeperjohn 04-21-2009 08:56 PM

Works on straight slot and phillips screw heads too.

TeamRush 04-21-2009 09:29 PM

Yup, old machinist trick and it works pretty well.
From what I know, the old machinists used to pick up the grindings (not the metallic tailings, but the worn away stone grindings) from the surface grinders and dip the tip of the screw drivers first in light machine oil, then the grindings.

Some guys would use emery powder instead of grindings, but now emery powder has gone the way of poured babbitt bearings in machine shops.

I used abrasive pastes now that I don't have regular access to grindings from the surface grinder.

I can see where valve grinding paste would work just as well, as long as it were the kind for HAND POWERED valve lapping/seating.

Used to, 'Pearl Drops' tooth polish would work for the same thing, seating valves and keeping drivers from slipping, but I don't know if they even sell that stuff anymore.

fep4 04-22-2009 12:58 PM

cool tip I haven't lapped valves since auto shop in high school so I will have to pick up some lapping compound plenty of pesky hardware on a yj to use it up on:D

Dirt Dog 04-22-2009 06:45 PM

Good tip...............

But man did you make me feel old.:(

I bet it's been twenty five + years since I've actually heard someone bring it up.

(I have done it and it has seemed to help. Not a "saveall" but one of the "every little bit helps" things)

TeamRush 04-23-2009 12:01 AM

It's like Dremel tool and buffing pad...
Use a little 'Whitening' toothpaste to take scratches and transfer marks out of glass, especially windshields and side windows...

We used to use it to take blemishes out of cranks, cams, ect. where metal to metal contact needed a SMOOTH surface, but the intended part has a manufacturing or machining defect in it.

Use the 'Tooth Polish' and buff to take the sharp edges off, and buff the surrounding areas.

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