Grinding drums
#3147679
05/30/23 07:32 PM
05/30/23 07:32 PM
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Joined: Apr 2005
Posts: 1,107 Lynch Road
mro
OP
super stock
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OP
super stock
Joined: Apr 2005
Posts: 1,107
Lynch Road
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Any national chains offer drum grinding?
68 Satellite Wagon and a few other ones
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Re: Grinding drums
[Re: mro]
#3147680
05/30/23 07:48 PM
05/30/23 07:48 PM
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Joined: Jan 2003
Posts: 21,080 Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,080
Niles , Ohio
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Do you mean turning or arching shoes to drums.Here few machine shops turn drums anymore.As for arcing shoes to drums last guy that did it her quit like 20 years ago.Chains usually have noone or equipment to turn drums.Some repair shops still turn them
Chrysler Firepower
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Re: Grinding drums
[Re: mro]
#3147725
05/31/23 12:01 AM
05/31/23 12:01 AM
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Joined: Aug 2003
Posts: 43,251 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,251
Bend,OR USA
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Any decent front end and brake shop should be able to turn them Some of the cheaper aftermarket drums come close to being at the max size to start with new
Last edited by Cab_Burge; 05/31/23 12:01 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Grinding drums
[Re: mro]
#3147754
05/31/23 07:57 AM
05/31/23 07:57 AM
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Joined: Mar 2011
Posts: 3,089 Michigan
A727Tflite
master
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master
Joined: Mar 2011
Posts: 3,089
Michigan
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Any national chains offer drum grinding? Haven’t seen a drum grinding attachment in quite a while. Better shops had them and the brake lab at Chrysler did too. Oval and road race teams always ground the drums back then from what I was told.
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Re: Grinding drums
[Re: gtx6970]
#3147786
05/31/23 11:33 AM
05/31/23 11:33 AM
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Joined: May 2003
Posts: 3,093 N.W. Florida
Fat_Mike
master
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master
Joined: May 2003
Posts: 3,093
N.W. Florida
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My local O'Rielly still turns drums/rotors Last I knew (several years ago), my local O'Reilly's did as well.
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Re: Grinding drums
[Re: cudaman1969]
#3147830
05/31/23 01:47 PM
05/31/23 01:47 PM
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Joined: Sep 2003
Posts: 19,521 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,521
north of coder
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i have a mandrel that fits a lathe, having a register the exact size of the axle/hub factory register. it is also the diameter [actually a little larger] of the hub/axle the wheel bolts to, so that the drum [or rotor] being turned is retained as it would be with the wheel bolted to it. as a machinist, i feel this gives a better result than the parts store "cone shaped" locating device that just picks up the center hole of the drum/rotor being turned. i also use a much larger cutting tool, which not only gives a much better surface finish, [being a substantially more rigid tool] it also doesn't "bounce around" like the tiny [in my opinion] cutting tools used with the parts store machines, thus giving a much truer diameter to the finished drum and a much flatter surface to the finished rotor.
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Re: Grinding drums
[Re: moparx]
#3149540
06/07/23 08:56 PM
06/07/23 08:56 PM
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Joined: May 2006
Posts: 1,757 Phila
PhillyRag
top fuel
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top fuel
Joined: May 2006
Posts: 1,757
Phila
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i have a mandrel that fits a lathe, having a register the exact size of the axle/hub factory register. it is also the diameter [actually a little larger] of the hub/axle the wheel bolts to, so that the drum [or rotor] being turned is retained as it would be with the wheel bolted to it. as a machinist, i feel this gives a better result than the parts store "cone shaped" locating device that just picks up the center hole of the drum/rotor being turned. i also use a much larger cutting tool, which not only gives a much better surface finish, [being a substantially more rigid tool] it also doesn't "bounce around" like the tiny [in my opinion] cutting tools used with the parts store machines, thus giving a much truer diameter to the finished drum and a much flatter surface to the finished rotor. Who else here doesn't have such a lathe setup?
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Re: Grinding drums
[Re: PhillyRag]
#3149577
06/07/23 10:06 PM
06/07/23 10:06 PM
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Joined: Jan 2003
Posts: 4,276 Morrow, OH
markz528
master
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master
Joined: Jan 2003
Posts: 4,276
Morrow, OH
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i have a mandrel that fits a lathe, having a register the exact size of the axle/hub factory register. it is also the diameter [actually a little larger] of the hub/axle the wheel bolts to, so that the drum [or rotor] being turned is retained as it would be with the wheel bolted to it. as a machinist, i feel this gives a better result than the parts store "cone shaped" locating device that just picks up the center hole of the drum/rotor being turned. i also use a much larger cutting tool, which not only gives a much better surface finish, [being a substantially more rigid tool] it also doesn't "bounce around" like the tiny [in my opinion] cutting tools used with the parts store machines, thus giving a much truer diameter to the finished drum and a much flatter surface to the finished rotor. Who else here doesn't have such a lathe setup? You don't know what you are missing? How about a cnc mill? Even better!
67 Coronet 500 9.610 @ 139.20 mph 67 Coronet 500 (street car) 14.82 @ 94 mph 69 GTX (clone) - build in progress......
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Re: Grinding drums
[Re: markz528]
#3149690
06/08/23 12:54 PM
06/08/23 12:54 PM
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Joined: Jan 2004
Posts: 8,311 fredericksburg,va
cudaman1969
master
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master
Joined: Jan 2004
Posts: 8,311
fredericksburg,va
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i have a mandrel that fits a lathe, having a register the exact size of the axle/hub factory register. it is also the diameter [actually a little larger] of the hub/axle the wheel bolts to, so that the drum [or rotor] being turned is retained as it would be with the wheel bolted to it. as a machinist, i feel this gives a better result than the parts store "cone shaped" locating device that just picks up the center hole of the drum/rotor being turned. i also use a much larger cutting tool, which not only gives a much better surface finish, [being a substantially more rigid tool] it also doesn't "bounce around" like the tiny [in my opinion] cutting tools used with the parts store machines, thus giving a much truer diameter to the finished drum and a much flatter surface to the finished rotor. Who else here doesn't have such a lathe setup? You don't know what you are missing? How about a cnc mill? Even better! Agree, I find something new to do on both the lathe and end mill almost everyday! I took your advise and now setting up a front wheel hub to cut my drums
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Re: Grinding drums
[Re: cudaman1969]
#3149738
06/08/23 02:55 PM
06/08/23 02:55 PM
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Joined: Sep 2003
Posts: 19,521 north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,521
north of coder
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i have a mandrel that fits a lathe, having a register the exact size of the axle/hub factory register. it is also the diameter [actually a little larger] of the hub/axle the wheel bolts to, so that the drum [or rotor] being turned is retained as it would be with the wheel bolted to it. as a machinist, i feel this gives a better result than the parts store "cone shaped" locating device that just picks up the center hole of the drum/rotor being turned. i also use a much larger cutting tool, which not only gives a much better surface finish, [being a substantially more rigid tool] it also doesn't "bounce around" like the tiny [in my opinion] cutting tools used with the parts store machines, thus giving a much truer diameter to the finished drum and a much flatter surface to the finished rotor. Who else here doesn't have such a lathe setup? You don't know what you are missing? How about a cnc mill? Even better! Agree, I find something new to do on both the lathe and end mill almost everyday! I took your advise and now setting up a front wheel hub to cut my drums i know most do not have this type of equipment at home, but being a machinist and fabricator by trade, once retirement hits, one usually wants to continue with his trade. this almost dictates one to purchase, or have access to, equipment he has "played with" over the course of his working career. this is similar to guys who have woodworking equipment in their home shop. the only difference is the "chips produced" are metal instead of wood. the one advantage here, is if a mistake is made, metal can be "added" and the mistake repaired by welding then re-doing the item in question. whereas i haven't found a "wood rod or wire" that could be used on any of my welding machines.
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Re: Grinding drums
[Re: Fat_Mike]
#3151029
06/12/23 10:08 PM
06/12/23 10:08 PM
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Joined: Aug 2006
Posts: 154 Missouri
70X
member
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member
Joined: Aug 2006
Posts: 154
Missouri
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My local O'Rielly still turns drums/rotors Last I knew (several years ago), my local O'Reilly's did as well. Ours does to, call and ask if they turn drums, never referred to it as grinding.... Could be the part of the country you are in for different terms used.
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Re: Grinding drums
[Re: 70X]
#3151046
06/12/23 11:58 PM
06/12/23 11:58 PM
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Joined: May 2012
Posts: 1,842 South Bend
John Brown
top fuel
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top fuel
Joined: May 2012
Posts: 1,842
South Bend
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My local O'Rielly still turns drums/rotors Last I knew (several years ago), my local O'Reilly's did as well. Ours does to, call and ask if they turn drums, never referred to it as grinding.... Could be the part of the country you are in for different terms used. Years ago, long before I started driving, it was common to have a motorized grinding wheel that mounted on a fixture in a manner like a drum lathe tool bit does. The reason for using the grinding wheel was that hard spots in the drum could be ground smooth without ripping out the metal like a standard steel tool bit did. When carbide tool bits became commonplace, there was less need to grind the hard spots out, and since time equals money, and real machinists get real money, grinding drums went the way of the Dodo. Same deal with arcing brake shoes. It's hard enough finding competent machinists, and if you do, they want to be paid. Besides that, people realized that asbestos dust if harmful to your health. Eventually, more parts suppliers started stocking oversize shoes that worked well enough without needing skilled labor to make them fit the drums. .030 and .060 oversize became commonplace. When I would do stock updates, I even found shoes in parts stores that were .090 oversize. Drums would be getting awful thin at that point.
July 19th should be "Drive Like Rockford Day". R.I.P. Jimmie.
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