Ribe Bits

[jamesjedi]

Hi,

Hoping someone knows a little about Ribe bits? Mac tools sells Ribe bits, but they sell them as M6, M7 etc. is the M the same as the R? What I need is listed below;

· A-Caliper and Wide A-Caliper (911SC and Carrera models through 1989) – R6 bit for an M9 fastener

· Rear Carrera Caliper (911 Carrera through 1989) – R6 bit for an M7 fastener

Thanks for any help!

[jamesjedi]

Hopefully this will help anyone looking for the same information. I sent an email to MAC tools. They responded;

"the R stands for Ribe, the M is for metric. Ribe bits are made in metric sizing so yes, and M6 and R6 are the same size"

[gtc]

When you use Ribe bits, only use the bit to hold the bolt in place. Use your wrench to turn the nut on the other end. Otherwise you will most likely break the bit.
Repeat this to yourself over and over before you start... I forgot to do this and busted my one R7 bit while tightening the last bolt on my calipers.

[jamesjedi]

You bring up a good point about torquing the bolt.

I did not realize it would be an issue for tightening as well.

[Porboynz]

Originally Posted by gtc

When you use Ribe bits, only use the bit to hold the bolt in place. Use your wrench to turn the nut on the other end. Otherwise you will most likely break the bit.
Repeat this to yourself over and over before you start... I forgot to do this and busted my one R7 bit while tightening the last bolt on my calipers.

Make sure your torque wrench is accurate, you will need a 3/8 drive or maybe even a 1/4 drive torque wrench for the callipers nuts, keep that 1/2 inch torque wrench for the mounting bolts.

[jamesjedi]

Thanks for the replies. Did any of you use Loctite?

[Quinlan]

I rebuilt a couple of sets of calipers last year. The nuts were reasonably easy to loosen, so it doesn't seem like the factory used loctite.

[jamesjedi]

Is the Permatex Extreme Ceramic Lubricant the same as the ATE assembly lube? I just called Permatex, and they did not recommend it for assembly.

[jamesjedi]

Who sells the ATE assembly Lube? I have been looking everywhere.

[gtc]

Pelican sells it.
1988 Porsche 911 Carrera Coupe - Brake Hydraulics - Page 2

I used the permatex ceramic stuff... not my favorite stuff ever, but my brakes work fine.
I would probably just use brake fluid next time.

[djpateman]

Only use assembly lube for fluid wetted parts.
All other brake lubes are for external use only.
I agree, use the bits only to hold, not to turn.

[jamesjedi]

Is it the Plastilube?

[David E. Clark]

Originally Posted by gtc

When you use Ribe bits, only use the bit to hold the bolt in place. Use your wrench to turn the nut on the other end. Otherwise you will most likely break the bit.
Repeat this to yourself over and over before you start... I forgot to do this and busted my one R7 bit while tightening the last bolt on my calipers.

Here's some excellent advice from Grady Clay. He's still helping. RIP

split calipers - seals - Warren?

The one's I have are Hazet. Expensive ... but worth it.

[jamesjedi]

I will definitely read Warrens post on the rebuild. Nice bits, but cost much more than my Mac bits!

Well, I just bought the ATE Plastilube....I assume it the correct stuff.

Thanks again to all who contributed.

[jamesjedi]

More information;

Plastilube is not for the piston. ATE Bremszylinder-Paste is for the pistons. It is essentially unavailable in the US/Canada.