Material for a motocross bike disc brake? - Corsa Sport - for Vauxhall and Opel Corsa B, Corsa C and Corsa D

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Tiger

Member

Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
User status: Offline

5th Jan 15 at 15:41

I'm making a few disc brakes for my mx bike as it's cheaper than buying them and I can tailor the design slightly to suit.

What's a good characteristic of a brake disc, material, grade, surface area etc.

The discs will never get very hot as the brakes are mostly wet or the bike is never stopping from high speed. I don't want a material that will degrade the pads too quickly.

Cheers.

[Edited on 05-01-2015 by Tiger]

taylorboosh

Member

Registered: 3rd Apr 07
User status: Offline

5th Jan 15 at 15:50

Copper mate

taylorboosh

Member

Registered: 3rd Apr 07
User status: Offline

5th Jan 15 at 15:50

Or lead

DaveyLC

Member

Registered: 8th Oct 08
Location: Berkshire
User status: Offline

5th Jan 15 at 16:01

Surely its cheaper to buy discs? Discs are cast iron so they are very hard, anything that is going to be of a comparable hardness is going to be VERY difficult to work with.

Tiger

Member

Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
User status: Offline

5th Jan 15 at 16:06

The ones I've bought recently are stainless steel.

I can make them for free so that's pretty cheap.

DaveyLC

Member

Registered: 8th Oct 08
Location: Berkshire
User status: Offline

5th Jan 15 at 16:07

You must have a pretty sick lathe/mill/cnc machine?

Tiger

Member

Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
User status: Offline

5th Jan 15 at 16:35

£0.5m laser cutter.

GB123

Premium Member

Registered: 21st Nov 11
Location: Kent
User status: Offline

5th Jan 15 at 16:40

Asbestos

micra_pete

Premium Member

Registered: 23rd Apr 03
Location: West Yorkshire
User status: Offline

5th Jan 15 at 17:15

quote:
Originally posted by Tiger
£0.5m laser cutter.

DaveyLC

Member

Registered: 8th Oct 08
Location: Berkshire
User status: Offline

5th Jan 15 at 17:16

I certainly got told..

alan-g-w

Member

Registered: 9th Nov 07
Location: Glasgow
User status: Offline

5th Jan 15 at 18:24

quote:
Originally posted by DaveyLC
Surely its cheaper to buy discs? Discs are cast iron so they are very hard, anything that is going to be of a comparable hardness is going to be VERY difficult to work with.

Cast iron is actually really easy to machine Davey. If you're not taking too heavy a cut its actually self lubricating as well.

Are you going to face them after cutting them out tiger...?

Corsa_Sport21

Member

Registered: 13th Apr 08
Location: Leven, Fife. Drives : 205 GTi
User status: Offline

5th Jan 15 at 18:28

Make them from wood.

Works for EBC brake products.

taylorboosh

Member

Registered: 3rd Apr 07
User status: Offline

5th Jan 15 at 18:37

quote:
Originally posted by Corsa_Sport21
Make them from wood.

Works for EBC brake products.

And jeds v6 manifold flanges

Tiger

Member

Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
User status: Offline

5th Jan 15 at 18:38

quote:
Originally posted by micra_pete

quote:
Originally posted by Tiger
£0.5m laser cutter.

Calm down

just trying to put some scale to the equipment available!

GB123

Premium Member

Registered: 21st Nov 11
Location: Kent
User status: Offline

5th Jan 15 at 19:52

quote:
Originally posted by taylorboosh

quote:
Originally posted by Corsa_Sport21
Make them from wood.

Works for EBC brake products.

And jeds v6 manifold flanges

Not sure MDF is technically wood

taylorboosh

Member

Registered: 3rd Apr 07
User status: Offline

5th Jan 15 at 19:54

True dat

johnny86

Premium Member

Registered: 15th Feb 10
Location: in a bus stop.
User status: Offline

5th Jan 15 at 20:18

Can't you make other brake discs and sell them on.

--ToM--

Member

Registered: 23rd Nov 07
Location: Wirral
User status: Offline

5th Jan 15 at 20:28

Surely there would have to be some kind of product testing it would have to pass to be sold to public with it being brakes ?

John

Member

Registered: 30th Jun 03
User status: Offline

5th Jan 15 at 20:28

quote:
Originally posted by johnny86
Can't you make other brake discs and sell them on.

Like a company who makes brake discs?

taylorboosh

Member

Registered: 3rd Apr 07
User status: Offline

5th Jan 15 at 20:32

This is pikey as fuck imo one thing not to fuck about with

johnny86

Premium Member

Registered: 15th Feb 10
Location: in a bus stop.
User status: Offline

5th Jan 15 at 20:40

quote:
Originally posted by John

quote:
Originally posted by johnny86
Can't you make other brake discs and sell them on.

Like a company who makes brake discs?

What I mean was sell them cheaper than other companies

Russ

Member

Registered: 14th Mar 04
Location: Armchair
User status: Offline

5th Jan 15 at 21:21

quote:
Originally posted by johnny86

quote:
Originally posted by John

quote:
Originally posted by johnny86
Can't you make other brake discs and sell them on.

Like a company who makes brake discs?

What I mean was sell them cheaper than other companies

i swear, this guy

Gary

Premium Member

Registered: 22nd Nov 06
Location: West Yorkshire
User status: Offline

5th Jan 15 at 21:27

Disks will be cut then heat treated then ground down flat I would have thought. Just buy some ffs.

Member

Registered: 10th Sep 03
User status: Offline

5th Jan 15 at 21:42

What Gary said - we did it at uni and it was a pretty big job in terms of hours spent. They were a 2 axis mill job and then ground flat. The material used was some kind of cast iron plate (alloy I assume). Don't have many details on it than that.

Tiger

Member

Registered: 12th Jun 01
Location: Leicestershire Drives:Astra VXR
User status: Offline

5th Jan 15 at 23:13

The ones I've bought I can easily replicate, I've got access to all the machinery I need to make the actual disc. But if I was going to do it, I'd want to do it better than what I can buy buck for buck.

Of course it's easier just to buy them but the challenge would be to make something is use.

The one I've bought is lasered from sheet steel, that much is obvious as I see lasered metal all day long. It's made from stainless steel, I don't know what grade though. I can spin them up to make sure they have no buckle in them.

This is more of a project, hence why I'm asking.

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