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elpres Samba Member
Joined: August 03, 2010 Posts: 321 Location: Denmark
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Posted: Wed Jan 13, 2021 12:18 pm Post subject: Drum minimum thickness |
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I have This early bay and I’m in the process of making a “to buy” list.
The brake drums are sort of expensive, so I thought I would have a machine shop turn them over. But I can’t find any minimum specs anywhere. I found a little info at ratwell but not sure if it’s for an early.
Any input would be appreciated. _________________ Jakob |
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busdaddy Samba Member
Joined: February 12, 2004 Posts: 51057 Location: Surrey B.C. Canada, but thinking of Ukraine
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Posted: Wed Jan 13, 2021 12:42 pm Post subject: Re: Drum minimum thickness |
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Can you be more specific about "early"?, that covers a few models. _________________ Rust NEVER sleeps and stock never goes out of style.
Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
Stop dead photo links! Post your photos to The Samba Gallery!
Слава Україні! |
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elpres Samba Member
Joined: August 03, 2010 Posts: 321 Location: Denmark
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Posted: Wed Jan 13, 2021 12:43 pm Post subject: Re: Drum minimum thickness |
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busdaddy wrote: |
Can you be more specific about "early"?, that covers a few models. |
Its from 70 _________________ Jakob |
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halfassleatherworks Samba Member
Joined: December 09, 2018 Posts: 635 Location: Reno NV
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Posted: Wed Jan 13, 2021 12:58 pm Post subject: Re: Drum minimum thickness |
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68 to 70 brake drum ID new
front 250.0+0.20mm 9.842"+.008
wear limit 251.5mm 9.90"
rear 251.0mm+.20 9.882+.008
wear limit 251.5mm 9.90"
71 and later
Front 252.00+0.20 mm 9.920"+.008
wear limit 253.5mm 9.980"
Rear 253.00+0.20mm 9.960"+.008
wear limit 253.5mm 9.980" _________________ Halfass Leatherworks*****GOT LEATHER Made to order Leather crafts, you can find us on that face book thing
Belts, wallets, mouse pads, drink coasters, Engraving, most things made in leather.
personal items if you want it in leather in Reno Nv, ***** |
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elpres Samba Member
Joined: August 03, 2010 Posts: 321 Location: Denmark
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Posted: Wed Jan 13, 2021 1:03 pm Post subject: Re: Drum minimum thickness |
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halfassleatherworks wrote: |
68 to 70 brake drum ID new
front 250.0+0.20mm 9.842"+.008
wear limit 251.5mm 9.90"
rear 251.0mm+.20 9.882+.008
wear limit 251.5mm 9.90"
71 and later
Front 252.00+0.20 mm 9.920"+.008
wear limit 253.5mm 9.980"
Rear 253.00+0.20mm 9.960"+.008
wear limit 253.5mm 9.980" |
That’s great stuff. Thank you so much. _________________ Jakob |
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halfassleatherworks Samba Member
Joined: December 09, 2018 Posts: 635 Location: Reno NV
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Posted: Wed Jan 13, 2021 4:57 pm Post subject: Re: Drum minimum thickness |
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your welcome _________________ Halfass Leatherworks*****GOT LEATHER Made to order Leather crafts, you can find us on that face book thing
Belts, wallets, mouse pads, drink coasters, Engraving, most things made in leather.
personal items if you want it in leather in Reno Nv, ***** |
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Manfred58sc Samba Member
Joined: October 05, 2009 Posts: 3374
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Posted: Wed Jan 13, 2021 6:47 pm Post subject: Re: Drum minimum thickness |
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Don't turn em! If you ruin the ones you have then its off hunting OG or making do with Brazilian ones. Brake the glaze with sand paper. _________________ Fat chick owner/operator |
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aeromech Samba Member
Joined: January 24, 2006 Posts: 16922 Location: San Diego, California
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Posted: Wed Jan 13, 2021 8:03 pm Post subject: Re: Drum minimum thickness |
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I’m working on a 1968 with new drums from Wolfsburg West. About $300 for the pair _________________ Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound |
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HarryFD Samba Member
Joined: February 24, 2012 Posts: 746 Location: Portland, OR
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Posted: Fri Jan 15, 2021 12:50 pm Post subject: Re: Drum minimum thickness |
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aeromech wrote: |
I’m working on a 1968 with new drums from Wolfsburg West. About $300 for the pair |
Are these the "Chinesium" ones or what is the source?
My front drums were worn past the limit. Locally, I could get some NOS German ones at $250/ea or the Chinese ones found on many of the web suppliers at about $100/ea.
Ended up using a set of used (within spec) I found at at Avery's for $100 for the pair with VW Markings. _________________ 1970 Deluxe Sunroof Bay Brilliant Blue/Cloud White
1973.5 911 Targa
2009 MB C300 |
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Wildthings Samba Member
Joined: March 13, 2005 Posts: 50255
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Posted: Fri Jan 15, 2021 1:25 pm Post subject: Re: Drum minimum thickness |
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halfassleatherworks wrote: |
Rear 253.00+0.20mm 9.960"+.008
wear limit 253.5mm 9.980" |
Rear 252.00mm
Rear wear limit with stock thickness linings 235.00mm
Rear wear limit with +0.5mm linings 235.5mm |
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halfassleatherworks Samba Member
Joined: December 09, 2018 Posts: 635 Location: Reno NV
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Posted: Fri Jan 15, 2021 2:34 pm Post subject: Re: Drum minimum thickness |
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My mistake this will clarify
_________________ Halfass Leatherworks*****GOT LEATHER Made to order Leather crafts, you can find us on that face book thing
Belts, wallets, mouse pads, drink coasters, Engraving, most things made in leather.
personal items if you want it in leather in Reno Nv, ***** |
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aeromech Samba Member
Joined: January 24, 2006 Posts: 16922 Location: San Diego, California
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Posted: Fri Jan 15, 2021 5:09 pm Post subject: Re: Drum minimum thickness |
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Are these the "Chinesium" ones or what is the source?
They are front drums from Germany they say. $165 each. You can look them up. _________________ Lead Mechanic: San Diego Air and Space Museum
Licensed Airframe and Powerplant Mechanic
Licensed Pilot (Single engine Land)
Boeing 727,737-200-300-400,757,767
Airbus A319,320,321
DC9/MD80
BAe146
Fokker F28/F100
VW type 1 1962,63,65,69,72
VW Type 2 1971 (3 ea.) 1978, 1969
VW Jetta
VW Passat
Capable of leaping tall buildings in a single bound |
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Manfred58sc Samba Member
Joined: October 05, 2009 Posts: 3374
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Posted: Fri Jan 15, 2021 7:30 pm Post subject: Re: Drum minimum thickness |
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An option for drums that are at the limit is to have extra thick linings installed on your core shoes. I had this done at Pueblo Brake and Clutch, they found an "offroad" lining set and bonded them to my cores for like $55. Worked great _________________ Fat chick owner/operator |
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bsairhead Samba Member
Joined: October 08, 2008 Posts: 3473 Location: viroqua wi.
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Posted: Fri Jan 15, 2021 9:11 pm Post subject: Re: Drum minimum thickness |
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Manfred58sc wrote: |
An option for drums that are at the limit is to have extra thick linings installed on your core shoes. I had this done at Pueblo Brake and Clutch, they found an "offroad" lining set and bonded them to my cores for like $55. Worked great |
Does that sound like a bad idea to anyone else? |
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SGKent Samba Member
Joined: October 30, 2007 Posts: 41031 Location: Citrus Heights CA (Near Sacramento)
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Posted: Fri Jan 15, 2021 9:19 pm Post subject: Re: Drum minimum thickness |
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my experience is that as drums get thinner they heat up and fade faster. The best braking is new arced linings combined with new drums. Few places, if any, arc shoes so I did mine with sand paper. _________________ “Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin |
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Wildthings Samba Member
Joined: March 13, 2005 Posts: 50255
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Posted: Fri Jan 15, 2021 11:38 pm Post subject: Re: Drum minimum thickness |
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bsairhead wrote: |
Manfred58sc wrote: |
An option for drums that are at the limit is to have extra thick linings installed on your core shoes. I had this done at Pueblo Brake and Clutch, they found an "offroad" lining set and bonded them to my cores for like $55. Worked great |
Does that sound like a bad idea to anyone else? |
It is mentioned in the Vanagon Bentley for use between 253 and 253.5mm. It is mentioned in the Beetle Bentley as well, IIRC. |
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HarryFD Samba Member
Joined: February 24, 2012 Posts: 746 Location: Portland, OR
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Posted: Sat Jan 16, 2021 12:31 am Post subject: Re: Drum minimum thickness |
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aeromech wrote: |
Are these the "Chinesium" ones or what is the source?
They are front drums from Germany they say. $165 each. You can look them up. |
Thanks for the update. Definitely better than the $250 each I was quoted for a pair from a local source. _________________ 1970 Deluxe Sunroof Bay Brilliant Blue/Cloud White
1973.5 911 Targa
2009 MB C300 |
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Abscate Samba Member
Joined: October 05, 2014 Posts: 22568 Location: NYC/Upstate/ROW
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Posted: Sat Jan 16, 2021 3:14 am Post subject: Re: Drum minimum thickness |
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bsairhead wrote: |
Manfred58sc wrote: |
An option for drums that are at the limit is to have extra thick linings installed on your core shoes. I had this done at Pueblo Brake and Clutch, they found an "offroad" lining set and bonded them to my cores for like $55. Worked great |
Does that sound like a bad idea to anyone else? |
If you are in mountains or hills, you would test a setup like this with 10 repeated hard stops and evaluate fade
If you are Flatworld like most of America this would work fine. Fresh brake fluid every 2 years,using DOT 4 in either case. _________________ .ssS! |
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onehappykombi Samba Member
Joined: March 26, 2017 Posts: 150
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Posted: Sat Jul 01, 2023 8:12 am Post subject: Re: Drum minimum thickness |
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halfassleatherworks wrote: |
My mistake this will clarify
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My Early Bay front right drum is at 252.2 - 252.3 millimeters _________________ '56 Early Split & '69 Early Bay
Overlanding the USA
Camper special engine build |
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Wildthings Samba Member
Joined: March 13, 2005 Posts: 50255
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Posted: Sat Jul 01, 2023 9:13 am Post subject: Re: Drum minimum thickness |
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onehappykombi wrote: |
My Early Bay front right drum is at 252.2 - 252.3 millimeters |
Which is over the wear limit. |
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