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Drilled brake Rotors (disks)

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craigb(at)onthenet.com.au
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Posted: Sat May 17, 2008 1:31 pm Post subject: Drilled brake Rotors (disks)

Does anyone know the legalities is drilled brake rotors, I weighed the

individual

rotor yesterday, and feel 2 pounds per rotor is a tad on the heavy side.

Having run

drilled stainless rotors for racing I feel a good weight saving could be

made here



craig

Checked by AVG.

7:42 PM

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rparigor(at)suffolk.lib.n
Guest

Posted: Sun May 18, 2008 8:20 am Post subject: Drilled brake Rotors (disks)

Hi Craig



"Does anyone know the legalities is drilled brake rotors"



Can't tell you the legalities, but can tell you that there are an

incredible number of holes needed to reduce weight, all of which need to

be deburred on both sides.



I built a custom motorcycle where I shoehorned a YTZ 250 motor into a YZ

80 frame (under 200 pounds with 65HP). I installed the disk brakes from

the 450 pound beast but the rear rotor was not drilled. It happened to be

same diameter as the front so I clamped together and transfer punched

drill marks. Hours and hours and hours drilled on that rotor, then figured

out there are 2 sides that need deburring! Looks pretty, I forget the

exact weight savings but it was not as much as I would have liked for the

amount of work invested.



Supposedly helps with cooling. Good chance after you completed task, you

would have hit on the perfect harmonics where each flight would yield a

slight different "whistle"!



Fooling aside, worth it to make a drill template so others can do the deed

to their rotor. Very kool (cool) the  increasing distance between drill

marks swirl instead of in line registration as diameter increases.



Ron Parigoris

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ami(at)mcfadyean.freeserv
Guest

Posted: Sun May 18, 2008 10:17 am Post subject: Drilled brake Rotors (disks)

Can't answer that,  but have you any info on the grade and hardness of the 

stainless material used?



Duncan McF.

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craigb(at)onthenet.com.au
Guest

Posted: Sun May 18, 2008 12:58 pm Post subject: Drilled brake Rotors (disks)

Not sure of the grade or hardness, but I intend to try and find out, we just

used to

buy them and bolt them on, they did turn blue occasionally if you really

gave them a

hard time, but I couldnt see them getting anywhere near the same punishment

when

on an aircraft, as speed will generally be a lot lower and weight is only up

about 100kg

and its normally only one big stop and your done



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karelvranken(at)hotmail.c
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Posted: Sun May 18, 2008 2:53 pm Post subject: Drilled brake Rotors (disks)

Craig,

Have a look at www.beringer.fr

Karel Vranken.

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craigb(at)onthenet.com.au
Guest

Posted: Sun May 18, 2008 4:12 pm Post subject: Drilled brake Rotors (disks)

They look great Karel



good weight saving too, complete wheel and brake for 4.25 pounds

instead of 6.6 pounds for just the wheel, will have to save up

my pennies and buy a set.



craig



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ami(at)mcfadyean.freeserv
Guest

Posted: Mon May 19, 2008 12:24 pm Post subject: Drilled brake Rotors (disks)

Craig,

In which case a softer grade with better "grip" (stainless is not as good as 

cast iron in this respect) may suffice for us.



Any idea what grade of stainless the normal aircraft disc substitutes are 

made of?



I've tried without success to find out.



Duncan McF

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Trevpond(at)aol.com
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Posted: Mon May 19, 2008 3:17 pm Post subject: Drilled brake Rotors (disks)

Duncan,

  

 I had stainless discs on my ARV - they don't last very long - too  soft.

  

  

 Trev Pond

 G-LINN

     [quote][b]

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grahamsingleton(at)btinte
Guest

Posted: Mon May 19, 2008 3:34 pm Post subject: Drilled brake Rotors (disks)

There was a company in the US who supplied stainless disks for EZs 

Unfortunately I don't know the grade but they were superb. The surface 

was dark grey, some sort of treatment.

They used to sell through ACS as a replacemnet for the awful Cleveland 

disks but I haven't seen them advertised for many years

Graham



Trevpond(at)aol.com wrote:

 	  Quote: 	
		   Duncan,

  

 I had stainless discs on my ARV - they don't last very long - too soft.

  

  

 Trev Pond

 G-LINN

 

 *

 

 

 *


	


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Graham Singleton



Tel: +441629820187

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