I need to add a set of LH drill bits, in that ARTU flavor, to the tool collection. Need a metric set of Timeserts too, and a full few sets of metric taps. ZI have all three 8x1.25, need the 6- and 10mm sizes. Maybe a couple extra 6- and 8- sets just to have. Time to dust off the wallet at the tool store again...

Oh-- Nice job identifying and fixing the problem, Brian. I would have no trouble putting a threaded insert in that hole so I could continue to use the same bolt size. The bolt-and-locknut idea is an OK second choice I guess.

Speculating on cause-- You might have sucked a bit of gravel in there, where it got wedged between the shield and the rotor, and stretched/distorted the bolt as it bent the shield. Shield did its job, protecting the caliper and saving your braking capacity for some important later time.

 

You Should have tried the easyout easyout...

and it that breaks...

easyout easyout easyout



Thanks for the tip... I have been in the same place.

LO

 

Bill, when it comes to breaking an easy-out, one has to experience the pain first hand before one trully understands the meaning of other people's warning! There is just no way around it.

 

Its safe to say that the remainder of my EZ out kit will not see much use in the 928 again......LH drill bits seems like a much better idea! I think part of the reason the screw was so hard to remove was the heat it must have generated before it sheared.....the bolt head was a really funky purpley color....maybe the rest of the screw semi-welded itself into the hole....I dunno

Those Artu drill bits are AMAZING.....supposedly carbide tiped with a slightly different cutting face...almost like adding another set of teeth at a different angle....funky but it works!

 

Another good tool for drilling out broken tungsten carbide taps or EZ-outs are diamond-tipped bits, such as Dremel makes. They cut through them like butter.

 

Im glad to see that you were able to fix it...Done here is MS peoplewould have just tied some bailing wire around the shield to hold it in

 

...I'm a bit partial to nylon zip ties myself, but I s'pose wire would work, too.

 

Bill
I remember you mentioning those......that was my next step if the Artu didn't work.......diamond bits in a dremel at 30K rpms should cut through anything!

 

WELL.....of course it didn't work exactly like I planned.....it turns out my "bolt on longer screw fix" WONT WORK...beacuse the caliper almost covers that hole!! So the caliper kept hitting the bolt and wouldn't line up right!!!!! So yesterday in the nice 100 degree heat I was getting quite frustrated....luckily my neighbor had a tap set (SAE unforunately) that fit right in....a quick run on the tap made some okay threads.....a spare bolt I had in the junk drawer with lots of locktite...& its actually done now!!!!! I didn't even think of wire or a zip-tie....I wonder if the zip tie would break because of the heat? :>) Wire would have worked well too.....I probably could have left it loose...since it didn't rub...but I want it to be "right".....such is life

 

I'm just wondering, perhaps a poll is called for... has ANYBODY ever successfully used an easy out?

 

Instead of a bolt, couldn't you use a stud?

 

Brian:

This is a 6mm bolt (10mm head), right? I have Time-Serts. Come on over on Sunday. Kirt and I will be servicing his AC starting at noon, and we can insert that hole. Since the hole is shallow it may take some modification of the insert, but I'm sure we can fix this good as new.

 

Never.

 

Nor have I.

 

never seen it done. Worked in a machine shop where I removed thousands. Best on a milling machine 2000 rpm and a special grind on a solid carbide drill. Never use coolant or cutting oil as the carbide will turn any steel to liquid before it come close to melting