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Thickness of 7.5 inch Rotors

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Post subject: Thickness of 7.5 inch Rotors

Posted: Mon Jul 15, 2019 4:19 pm

998cc

Joined: Tue Sep 06, 2005 1:26 pm
Posts: 808
Location: Adelaide

Does anyone know the minimum thickness at which 7.5 inch disc brake rotors can still be machined? Is it stamped on the rotor somewhere? I had some idea it was 10mm less than the new thickness which I seem to recall was around 6 mm. If I need new rotors which supplier is recommended?

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Slide
1965 Mini Van (1360)
1970 Mk2 Cooper S (1310)
1978 Rover SD1 V8 (4.6)
1996 Land Rover Discovery V8 (4.0)

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slide

Post subject: Re: Thickness of 7.5 inch Rotors

Posted: Mon Jul 15, 2019 6:25 pm

998cc

Joined: Tue Sep 06, 2005 1:26 pm
Posts: 808
Location: Adelaide

Sorry that should read 1mm undersize, not 10mm.

_________________
Slide
1965 Mini Van (1360)
1970 Mk2 Cooper S (1310)
1978 Rover SD1 V8 (4.6)
1996 Land Rover Discovery V8 (4.0)

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drmini in aust

Post subject: Re: Thickness of 7.5 inch Rotors

Posted: Mon Jul 15, 2019 6:36 pm

religious status

Joined: Fri Mar 19, 2004 6:19 pm
Posts: 39640
Location: near Baulkham Hills, NSW

They are 3/8" new, minimum used to be 5/16" = 8mm.
But so cheap new now they're not worth machining.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:

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gtogreen1969

Post subject: Re: Thickness of 7.5 inch Rotors

Posted: Mon Jul 15, 2019 6:51 pm

1275cc

Joined: Fri May 02, 2008 3:07 pm
Posts: 5071
Location: The Internet

These were from MKO and have MIN THK 8 MM stamped onto them. https://minikingdomonline.com.au/produc ... lubman-gt/ Only $25

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