MoT advisory - brake discs. Pointy - Page 3 - SV650.org

ophic · 12-11-14, 10:37 AM

So not forged. I wonder what the advantages of that method are? Forging gives greater strength and durability as it aligns the grains of metal. I can't imagine a cut steel sheet having the same benefits.

NTECUK · 12-11-14, 11:09 AM

Think how much unsprung weight having two cast disc's on the bike would be.

ophic · 12-11-14, 11:14 AM

If they were cast in the same shape and size as they currently are, I can't see it adding any weight. I don't think cast steel is significantly denser than sheet steel. Might be a wee bit brittle though.

NTECUK · 12-11-14, 11:21 AM

Rather you than me

Red Herring · 12-11-14, 01:11 PM

I'm no expert on metal processes but I'm pretty sure sheet steel is produced from a forging process where the steel is put through a series of rollers to get to the desired thickness. This process results in a more uniform alignment of the metals elements (I don't know the technical terms, I'm sure someone on here will correct me if needed) which gives it a far greater strength than the casting process where they are still in an unworked random order.

12-11-14, 10:37 AM	#21
ophic Member Mega Poster Join Date: Jan 2004 Location: Whyteleafe Posts: 3,395	Re: MoT advisory - brake discs. Pointy So not forged. I wonder what the advantages of that method are? Forging gives greater strength and durability as it aligns the grains of metal. I can't imagine a cut steel sheet having the same benefits. __________________ Silver SV650SK3, Fuel exhaust

12-11-14, 11:09 AM	#22
NTECUK Member Mega Poster Join Date: Apr 2011 Location: essex Posts: 5,314	Re: MoT advisory - brake discs. Pointy Think how much unsprung weight having two cast disc's on the bike would be. __________________ Raisin cookies that look like chocolate chip cookies are the reason I have trust issues.

12-11-14, 11:14 AM	#23
ophic Member Mega Poster Join Date: Jan 2004 Location: Whyteleafe Posts: 3,395	Re: MoT advisory - brake discs. Pointy If they were cast in the same shape and size as they currently are, I can't see it adding any weight. I don't think cast steel is significantly denser than sheet steel. Might be a wee bit brittle though. __________________ Silver SV650SK3, Fuel exhaust

12-11-14, 11:21 AM	#24
NTECUK Member Mega Poster Join Date: Apr 2011 Location: essex Posts: 5,314	Re: MoT advisory - brake discs. Pointy Rather you than me __________________ Raisin cookies that look like chocolate chip cookies are the reason I have trust issues.

12-11-14, 01:11 PM	#25
Red Herring Member Mega Poster Join Date: Dec 2007 Posts: 2,708	Re: MoT advisory - brake discs. Pointy I'm no expert on metal processes but I'm pretty sure sheet steel is produced from a forging process where the steel is put through a series of rollers to get to the desired thickness. This process results in a more uniform alignment of the metals elements (I don't know the technical terms, I'm sure someone on here will correct me if needed) which gives it a far greater strength than the casting process where they are still in an unworked random order.