Latest Norton Special Tool

ag12680 · Nov 23, 2015

New bushings and pin for MkIII swingarm. Pin fits bushings separately, but not when pressed in. Advised to use a brake master cylinder hone by my engine builder and Fred at Oldbritts. Advised by a local British car rebuilder to try another approach.

Worked perfectly. I'm thinking of applying for a patent...

My neighbor came up with another tool for torquing the cylinder base nuts. Thicker and narrower than a typical wrench so it can get in the tight places.

grandpaul · Nov 23, 2015

My set of "crow's foot" 3/8" drive spanner heads got up and walked off a few years ago.

One easy and necessary fix is to grind the outer edge of a box spanner, and grind it flat enough to fit between the fins, to get at the rear head bolt way underneath the head. Works great. Grind it a bit at a time and test fit until it JUST makes it in there, so you don't grind it too thin.

If you are REALLY resourceful, you can actually cut a nice 3/8" square hole in the handle at an exact distance from the spanner's head's center, so that you can easily calculate torque values with the modified spanner used as a torque wrench adapter.

nortonspeed · Nov 23, 2015

ag12680 said:
New bushings and pin for MkIII swingarm. Pin fits bushings separately, but not when pressed in. Advised to use a brake master cylinder hone by my engine builder and Fred at Oldbritts. Advised by a local British car rebuilder to try another approach.

Most peculiar :? The only proper way is to line ream the bushings after pressed in place.

JimNH · Nov 23, 2015

I save all my old broken sockets and extensions so making a box end crows foot wrench is as easy as welding the square drive end to the box end shank after grinding it to fit.

I will heat, bend, grind, weld, any wrench to make my own special tools. If welding a square drive on to attach a torque wrench make sure it at an easily calculable distance unless you can use it at exactly 90 degrees.

batrider · Nov 23, 2015

It's an oilite bushing right? I think it ruins the oil absorbing properties to smear the surface by reaming or sanding. But probably not the worst problem in the world.

Russ

ag12680 · Nov 23, 2015

Great tips, thanks guys..

Russ, I was concerned about that but without removing material the new pin would not go in and the old one was scored. Plus I did not want to remove any more than necessary.

comnoz · Nov 23, 2015

A quote from the oillite people - NSKBeemer

"Oilite bearings are a sintered (powdered) bronze composite with ~18% void that is vacuum impregnated with oil.
Abrasives of any sort used to hone the bore smear over the porous structure with swarf, destroying capillary wicking of lubricant to shaft interface.
Abrasives left in the pores cause damage to the mating part.
Burnishers will tend to close pores.
Dead sharp reamers are advised to avoid that"

fiatfan · Nov 24, 2015

Love the first "tool", good luck with the patent.... :lol: . Unless you´ve ruined the surface of course, according to the "oillite people" that comnoz posted, hope it works anyway. About the torque wrench setup; don´t you risk getting a wrong reading when using an extension that´s making the wrench longer? I seem to have read and heard that you should put the socket straight on the wrench to get it accurate. Same if you use a long straight extension, it can twist, at least if using high torque settings.
Tommy

ag12680 · Nov 24, 2015

Thanks Jim for the proper definition of oilite composition - makes sense. It's all together now so lesson learned for as long as this setup lasts...

grandpaul · Nov 24, 2015

fiatfan said:
About the torque wrench setup; don´t you risk getting a wrong reading when using an extension that´s making the wrench longer? I seem to have read and heard that you should put the socket straight on the wrench to get it accurate. Same if you use a long straight extension, it can twist, at least if using high torque settings.

As long as you have a sturdy attachment (factory produced or home-made), all you have to do is calculate a multilplier (as I stated before), calculate your desired reading using that multiplier, then have at it.

VA Rebel · Nov 27, 2015

Align torque wrench in a 90 degree angle from the crow foot extension. No multiplier necessary.

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