Print Page - Making new backing plates

General Category => Wheels & Tires => Topic started by: RickS on August 16, 2017, 05:04:30 PM

Title: Making new backing plates
Post by: RickS on August 16, 2017, 05:04:30 PM: I have an old beat up rear brake backing plate that was in less than usable condition. I have noticed these early plates were built differently, and with a much thinner material than the late plates. What is a person to do? Take apart the old plate to use as a template, and build new ones, but with thicker material.

Picture #

1 Old brake disassembled
2&3 Late Style brake
4 Old Style brake
5 New Front Plate
6&7 New rear Brakes

Notice how the late brakes use an offset in the plate, whereas the early use a spacer bar. The spacer is 3/16", but provides little additional support. The late style is 3/16 plate, much more stout than the 1/8 used in the early style.

I decided to make a couple of front plates while I was at it, as I have another front drum without the matching plate.

I still have to machine the pivots and install them, but I had to order some bar stock to make them.
Title: Re: Making new backing plates
Post by: Cocina_47 on August 16, 2017, 05:46:23 PM: Nice work!
Title: Re: Making new backing plates
Post by: pd on August 16, 2017, 06:44:02 PM: Looks like those will do the job , Rick . (http://www.cb750c.com/modules/Forums/images/smiles/thumbsup.gif)

I'm envious that you have the place and tools to do that .

Pete . :)
Title: Re: Making new backing plates
Post by: kartjockey on August 17, 2017, 03:19:59 AM: Good stuff man!
Title: Re: Making new backing plates
Post by: carryall on August 17, 2017, 06:00:57 AM: I suppose a guy could use aluminum in place of the steel if they wanted to shave a little weight off the bike also. Good work!
Title: Re: Making new backing plates
Post by: Bob53 on August 17, 2017, 06:37:05 AM: Good job. I suppose this means your up to something again. 55 beautifully done, stretch in a new home, empty space in the shop. Only a year to Portland. What's next?
Title: Re: Making new backing plates
Post by: RickS on August 17, 2017, 07:51:19 AM: Quote from: Bob53 on August 17, 2017, 06:37:05 AM
Good job. I suppose this means your up to something again. 55 beautifully done, stretch in a new home, empty space in the shop. Only a year to Portland. What's next?

Top secret, but there is a clue in the backing plates. Look closely! Lol
Title: Re: Making new backing plates
Post by: kartjockey on August 18, 2017, 03:57:37 AM: I have uncovered the clue. My hunch seems right!
Title: Re: Making new backing plates
Post by: pd on August 18, 2017, 05:30:05 AM: Hmm , will it 'be' , or will it be "more" ?

Pete . :)
Title: Re: Making new backing plates
Post by: RickS on August 23, 2017, 12:22:47 PM: I made the pivots for the shoes. It sure took a lot of filing to get them down to size! LOL What I did was mill them flat and then just rounded the corners off with a few passes of the file. In the 1st picture, left to right is an early pivot, a late pivot and my homemade one. Notice the early style does not have a bottom, but the later style does. I copied the later style, but I don't see any operational difference between the two.
Title: Re: Making new backing plates
Post by: pd on August 23, 2017, 12:42:52 PM: Lookin' good from here , Rick .

Pete . :)