Go Back   The Ford Barn > General Discussion > Model A (1928-31)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 04-06-2019, 06:43 AM   #1
dmengel
Junior Member
 
Join Date: Mar 2018
Location: Livonia, Michigan
Posts: 14
Default Stamped Brake Drum Picture?

Does anyone have pictures of the stamped and cast brake drums that show the differences? I think all Iím seeing online are cast ones and Iím not sure what I have on my car.
dmengel is offline   Reply With Quote
Old 04-06-2019, 06:55 AM   #2
Joe K
Senior Member
 
Joe K's Avatar
 
Join Date: Jul 2010
Location: Cow Hampshire
Posts: 3,512
Default Re: Stamped Brake Drum Picture?

Stamped brake drums are about 95 percent of brake drums out there. Characterized by a fairly thin section and a "rolled" edge.

Cast drums tend a bit thicker, have an edge that is "square & machined" and can be characterized by a "sandcast" look of the external drum surface (i.e. the casting sand leaves its own imprint in the solidified metal - this on older cast drums.)

Here are pix of original drums and backing plates removed as a unit. Note the rolled edges of both drum and backing plate which nearly "fit together."




Here are cast drums. Note the thicker section and the squared off edge.





Joe K
__________________
Shudda kept the horse.
Joe K is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 04-06-2019, 07:22 AM   #3
fast150
Junior Member
 
Join Date: Dec 2018
Location: Humboldt, TN
Posts: 4
Default Re: Stamped Brake Drum Picture?

I have noticed that the original steel drums do not have the large chamfer around the lug bolt holes. The new cast drums have that chamfer as pictured in Joe K's post above. I think that chamfer made swedging the lugs more difficult. If the drum material came up near the top of the step on the lug bolt, one would not have to swell the lug diameter so deep. With the large chamfer there, it seems to take more pressure, and the swedging tool has to go down into the chamfer further. It takes great care not to crack the casting between the lug hole and the large center hole. Just my observation.
fast150 is offline   Reply With Quote
Old 04-06-2019, 07:31 AM   #4
dmengel
Junior Member
 
Join Date: Mar 2018
Location: Livonia, Michigan
Posts: 14
Default Re: Stamped Brake Drum Picture?

Perfect! Thanks! My worries are confirmed that mine are stamped 😕
dmengel is offline   Reply With Quote
Old 04-06-2019, 08:48 AM   #5
Joe K
Senior Member
 
Joe K's Avatar
 
Join Date: Jul 2010
Location: Cow Hampshire
Posts: 3,512
Default Re: Stamped Brake Drum Picture?

"Reinforcing bands" are a possible partial remedy. IIRC most parts houses have these which can be heated/pressed on over an existing drum.

One earlier respondent of this board made his own reinforcing bands out of Pinto engine flywheels.

Joe K
__________________
Shudda kept the horse.

Last edited by Joe K; 04-06-2019 at 08:55 AM.
Joe K is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 10:03 PM.