WORN 7 INCH DISC FLANGE

[STG95F]

What do you people do when you are faced with a 7 " discs set and the drive flange is worn that bad it just drop through the bearing race ?

Thanks Ian

[Daz1968]

I had a damaged drive flange a long time ago but managed to get a better one used, if I was faced with a major problem now, I would try to find someone who does hard chrome coating then have reground to correct size, dont think it would be cheap but if no other option it would be possible, we used to have machine shafts at work done like this and they always gave good service, but also remember the bearing is clamped between drive flange and cv joint and once tightened even if a little loose on the drive flange dia may not give any problem in service if the hub is ok.
You could even try loctite bearing fit if not too bad

[STG95F]

Thanks Daz , Its the only time i have had a flange/shaft worn so bad .

the race must have been spinning on the shaft a long time and worn it away . I do have another 7"set up , so i think i will see what the condition is like

Shame they don't remake them like they do for the 7.5 set up

Thanks again Ian

[Daz1968]

Yes things were far worse when I first had my cooper though as discs were totally unavailable and it took ages to find some nos ones, at least these are available now.

[Goldbrocade_62]

Could a drum brake one be modded to fit?

[AndyB72]

I'm having problems with my 7 inch setup at the moment too. I've been trying to find the source of play in the setup and after replacing the hub/spacer/cv/flange/bearings with new parts I still have a bit of play, I can hear the disc knocking against the pads when I move it top/bottom. Should there be a touch of play or should it be rock solid?

If you get stuck I have a use flanges you could try.

[STG95F]

Thanks Andy ,

I know this seems a silly question but what is the difference side by side in the 7.5 Flanges and can they be machined down to suit ??

Just a thought ??

[rich@minispares.com]

it cannot be done

its half the reason we have not remade the 7" flanges

[mk1]

A 7.5 flange can't be machined down to 7" as the CV is a different diameter.

As has been said above it "MAY" be possible to machine down a standard drum CV as the CV diameter is correct. I have however NEVER looked into the possibility of doing this & I'm sitting at my office desk with no possibility of looking at the items at the moment.

[rich@minispares.com]

the drum one cannot be converted either, already looked into it...

trouble is the expected sales of 7" flanges just don't make it worth while making them

[mk1]

Understandably.

[STG95F]

so . we are up shit street then

Thanks any way

Ian

[Daz1968]

Metal spraying is an option that would be acceptable dependant on cost vs finding a better used one, another possibility is finding an equivalent bearing with smaller id and machining flange to suit, but both methods would entail higher cost. And finding a bearing may not be possible, anything is repairable just sometimes not cost effective. I would be up for a set if anyone manufactures any, not sure what batch quantity would be required though.

[Spider]

You could also build up the worn areas with weld and then machine them back to size.

[STG95F]

Great minds think alike

[360gts]

The question was asked...could regular mini hubs be used? Yes, I made a couple of these a few years back using regular hubs...they worked great and are still in use.
You need access to a good machinist or ...if you happen to have a really good lathe/drill press...you can do it your self.
The spacer I made from a piece cut from an existing hub...could be from the old cooper hub flange. That way the spacer has the splines to help support the inside bearing.

Prefer this method over welding...building up and machining...less chance of distortion.
A couple of pictures will help illustrate how it's done.

[STG95F]

Hi , That's interesting . Think that's the way to go then .

Just to confirm you used a Drum brake set flange ?

Ian

[360gts]

Yes, they are a dime a dozen....didn't mean to contradict Rich....This conversion works and works well.
You could probably get away with two new holes for the set screws as the studs do all the holding onto the flange.

[STG95F]

The spacer , Do make that from scratch ?

[360gts]

Just added some more info. Ian on the spacers. One can be made from the old flange...a new plain spacer can be made and slid onto the hub so that is up against the existing oil seal spacer. This one should be a snug fit for the oil seal to ride on...keep in mind when the drive shaft nut is tightened up these spacers will just be like the originals.