HO52 Drums & Backing Plates - The 1947 - Present Chevrolet & GMC Truck Message Board Network

vtblazer · 08-25-2009, 06:43 AM

Ready to bolt on.

$95.00 shipped

vtblazer · 08-26-2009, 05:42 AM

Or best offer...

roger0080 · 08-26-2009, 04:20 PM

I interested but:
1. are they for 9/16" or 1/2" wheel studs?
2. are they 11 x 2" drums? (I think that's what they should be)

vtblazer · 08-26-2009, 05:36 PM

Quote:

Originally Posted by roger0080

I interested but:
1. are they for 9/16" or 1/2" wheel studs?
2. are they 11 x 2" drums? (I think that's what they should be)

1. 9/16" (holes in drums measure 5/8")
2. Drums measure 12 1/4" in diameter, braking surface is 2"s.

roger0080 · 08-28-2009, 02:31 AM

Oh that's right they should be 12"x2", duh.

Is that 12-1/4" you state I.D. or O.D. ?

If it's not the I.D. can you measure the I.D. as accurately as you can?

I had a P.O. one time that had the drums worn way way (way!) past the the .060 to where they had to be replaced.

Thanks.

vtblazer · 08-28-2009, 08:00 AM

Closest I can measure with a tape measure tells me they're 12-5/16th I.D.

roger0080 · 08-28-2009, 12:03 PM

Let me compare that to a set I have out in the shed. Thanks.

vtblazer · 08-29-2009, 02:42 PM

Quote:

Originally Posted by roger0080

Let me compare that to a set I have out in the shed. Thanks.

Okay, let me know and I'll box em up asap if you want em.

roger0080 · 08-30-2009, 12:09 AM

I'm going to pass on them. Thanks.

vtblazer · 08-30-2009, 06:18 AM

Quote:

Originally Posted by roger0080

I'm going to pass on them. Thanks.

Something wrong with them?

Are they over spec?

roger0080 · 08-30-2009, 01:36 PM

I think they are way over spec.

Brand new is 12" (thereabouts).

Legal wear to where you are not suppose to use them anymore I think is at .060", ie 12.060". I think the .060 is stamped on it someplace.

My old worn out pair measured 12-1/8" and weren't doing much for stopping (with worn shoes).

I'm not confident that brand shoes would fill up the gap enough to ensure safe braking for any length of time, but I could be wrong. It's a lot of work on those axles to experiment with the drums and hubs and see if you can make it go or not. I ditched my 12-1/8" worn ones in the past and found some used ones that had life in them to turn.

vtblazer · 08-30-2009, 01:55 PM

Quote:

Originally Posted by roger0080

I think they are way over spec.

Brand new is 12" (thereabouts).

Legal wear to where you are not suppose to use them anymore I think is at .060", ie 12.060". I think the .060 is stamped on it someplace.

My old worn out pair measured 12-1/8" and weren't doing much for stopping (with worn shoes).

I'm not confident that brand shoes would fill up the gap enough to ensure safe braking for any length of time, but I could be wrong. It's a lot of work on those axles to experiment with the drums and hubs and see if you can make it go or not. I ditched my 12-1/8" worn ones in the past and found some used ones that had life in them to turn.

Fair enough, thanks for the info.

I got them from someone else by accident & never used em, guess they're headed for the metal dumpster.

BCOWANWHEELS · 08-30-2009, 02:35 PM

If there still thick use them. Just measure the drum thickness with calipers. Remember when these trucks was made steel was cheap and they used alot of it. You can always have thicker pads on your shoes when you have them relinned too. These drums are very hard to find and forget about finding a set " in spec's. "

vtblazer · 08-30-2009, 03:13 PM

Even better info.

heyjoe · 08-30-2009, 04:48 PM

FWIW
My drum research for my '67 C20 w/HO52:

Standard issue brakes 11 5/32" X 2 1/2"
Optional Heavy Duty brakes 11 5/32" X 2 3/4"

BCOWANWHEELS · 08-31-2009, 02:39 AM

Those drums look ok from what i see in the pic,s. Especially if your in a bind for drums. THE TRICK TO HARD TO FIND drums is when you have them turnned dont try to get them perfect, just turn em just enough to get the hi spots. the shoes will wear into the low spots. just something you have to do with hard to find drums.

vtblazer · 09-06-2009, 09:31 AM

Last bump, either they go to a board member who can use em or they go into the metal dumpster.

Tried several times over the last couple years to offer them up, tired of tripping over them.

08-25-2009, 06:43 AM	#1
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,537	HO52 Drums & Backing Plates Ready to bolt on. $95.00 shipped Attached Images Last edited by vtblazer; 08-25-2009 at 06:44 AM.

08-26-2009, 05:42 AM	#2
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,537	Re: HO52 Drums & Backing Plates Or best offer...

08-26-2009, 04:20 PM	#3
roger0080 Registered User Join Date: Nov 2000 Location: Carver County, Minnesota, USA Posts: 626	Re: HO52 Drums & Backing Plates I interested but: 1. are they for 9/16" or 1/2" wheel studs? 2. are they 11 x 2" drums? (I think that's what they should be) __________________ 72 Chev C-10 90% restored (former AZ truck) ... 71 Chev K-20 Cheyenne my vacation crusier... 72 Chev C-10 Now retired and striped after many faithful miles... 72 GMC 1500 Retired to the junk yard after bought new in '71...

08-28-2009, 02:31 AM	#5
roger0080 Registered User Join Date: Nov 2000 Location: Carver County, Minnesota, USA Posts: 626	Re: HO52 Drums & Backing Plates Oh that's right they should be 12"x2", duh. Is that 12-1/4" you state I.D. or O.D. ? If it's not the I.D. can you measure the I.D. as accurately as you can? I had a P.O. one time that had the drums worn way way (way!) past the the .060 to where they had to be replaced. Thanks. __________________ 72 Chev C-10 90% restored (former AZ truck) ... 71 Chev K-20 Cheyenne my vacation crusier... 72 Chev C-10 Now retired and striped after many faithful miles... 72 GMC 1500 Retired to the junk yard after bought new in '71...

08-28-2009, 08:00 AM	#6
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,537	Re: HO52 Drums & Backing Plates Closest I can measure with a tape measure tells me they're 12-5/16th I.D.

08-28-2009, 12:03 PM	#7
roger0080 Registered User Join Date: Nov 2000 Location: Carver County, Minnesota, USA Posts: 626	Re: HO52 Drums & Backing Plates Let me compare that to a set I have out in the shed. Thanks. __________________ 72 Chev C-10 90% restored (former AZ truck) ... 71 Chev K-20 Cheyenne my vacation crusier... 72 Chev C-10 Now retired and striped after many faithful miles... 72 GMC 1500 Retired to the junk yard after bought new in '71...

08-30-2009, 12:09 AM	#9
roger0080 Registered User Join Date: Nov 2000 Location: Carver County, Minnesota, USA Posts: 626	Re: HO52 Drums & Backing Plates I'm going to pass on them. Thanks. __________________ 72 Chev C-10 90% restored (former AZ truck) ... 71 Chev K-20 Cheyenne my vacation crusier... 72 Chev C-10 Now retired and striped after many faithful miles... 72 GMC 1500 Retired to the junk yard after bought new in '71...

08-30-2009, 01:36 PM	#11
roger0080 Registered User Join Date: Nov 2000 Location: Carver County, Minnesota, USA Posts: 626	Re: HO52 Drums & Backing Plates I think they are way over spec. Brand new is 12" (thereabouts). Legal wear to where you are not suppose to use them anymore I think is at .060", ie 12.060". I think the .060 is stamped on it someplace. My old worn out pair measured 12-1/8" and weren't doing much for stopping (with worn shoes). I'm not confident that brand shoes would fill up the gap enough to ensure safe braking for any length of time, but I could be wrong. It's a lot of work on those axles to experiment with the drums and hubs and see if you can make it go or not. I ditched my 12-1/8" worn ones in the past and found some used ones that had life in them to turn. __________________ 72 Chev C-10 90% restored (former AZ truck) ... 71 Chev K-20 Cheyenne my vacation crusier... 72 Chev C-10 Now retired and striped after many faithful miles... 72 GMC 1500 Retired to the junk yard after bought new in '71...

08-30-2009, 02:35 PM	#13
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	Re: HO52 Drums & Backing Plates If there still thick use them. Just measure the drum thickness with calipers. Remember when these trucks was made steel was cheap and they used alot of it. You can always have thicker pads on your shoes when you have them relinned too. These drums are very hard to find and forget about finding a set " in spec's. " __________________ I BELIEVE IN JOHN 3:16

08-30-2009, 03:13 PM	#14
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,537	Re: HO52 Drums & Backing Plates Even better info.

08-30-2009, 04:48 PM	#15
heyjoe Registered User Join Date: Apr 2003 Location: New Orleans area Posts: 198	Re: HO52 Drums & Backing Plates FWIW My drum research for my '67 C20 w/HO52: Standard issue brakes 11 5/32" X 2 1/2" Optional Heavy Duty brakes 11 5/32" X 2 3/4" __________________ '67 C20 small window Fleetside - 250 inline 6 - 3 on the tree - heavy duty clutch, brakes, rear springs - 17.5 wheels w/bias ply tires - AM radio - heater.

08-31-2009, 02:39 AM	#16
BCOWANWHEELS Registered User Join Date: Nov 2006 Location: KINGSPORT,TN. Posts: 3,035	Re: HO52 Drums & Backing Plates Those drums look ok from what i see in the pic,s. Especially if your in a bind for drums. THE TRICK TO HARD TO FIND drums is when you have them turnned dont try to get them perfect, just turn em just enough to get the hi spots. the shoes will wear into the low spots. just something you have to do with hard to find drums. __________________ I BELIEVE IN JOHN 3:16 Last edited by BCOWANWHEELS; 08-31-2009 at 02:41 AM.

09-06-2009, 09:31 AM	#17
vtblazer Registered User Join Date: Oct 2003 Location: Central Vermont Posts: 8,537	Re: HO52 Drums & Backing Plates Last bump, either they go to a board member who can use em or they go into the metal dumpster. Tried several times over the last couple years to offer them up, tired of tripping over them.



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