Clutch pressure plate

Hi all

I have to get new clutch friction and plain plates for my 68 Commando and can't decide if I should go for 750 or 850 style.

I have a usable pressure plate 750 thick style so if I go for an 850 style I would need the thinner pressure plate.

My question is can you machine the 750 pressure plate to the 850 plate dimensions as suggested on the Old Britt website. If so where do you machine it. From the front or the back. Does it have a hard face on it? Has anyone done this?

And is the 750 clutch really that bad? Shouldn't I stay with the original?

I am looking at the Barnett clutch.

Thanks
Dean

yes by machining the 750 plate you can stack in the 850 plates and creep up on the stack height for an easier clutch pull than you can with a 4 plate without risking it slipping. you also will do the machining on the friction side

Hi Bill

Do I only machine the friction side or is it both sides? Can you give me some guidance.

Thanks

I purchased a light weight anodized pressure plate from RGM. I machined it to adjust the stack height.
I wanted to retain the adonization of the clutch contact side so I machined the outside with the raised area that contacts the clutch spring/diaphragm. The issue here is that the raised area needs to maintain its position to retain its mechanical function. so it was a bit fussy but quite doable obviously.

As far as the standard units go, I think the choice is yours as long as the finish is kept.

as pete stated you can machine the spring side BUT it is tricky and you cant machine it off far enough to use the 850 setup. I ONLY do the friction side and use a REAL fine Finnish cut than polish it while still in the lathe

Dean said:

Hi Bill

Do I only machine the friction side or is it both sides? Can you give me some guidance.

Thanks

Click to expand...

Why don't you just buy the right pressure plate, there be some good second hand ones around I am sure, when
you replace a clutch on a car you always replace the pressure plate, so why not replace all the clutch with new.

Ashley

pete.v said:

I purchased a light weight anodized pressure plate from RGM. I machined it to adjust the stack height.
I wanted to retain the adonization of the clutch contact side so I machined the outside with the raised area that contacts the clutch spring/diaphragm. The issue here is that the raised area needs to maintain its position to retain its mechanical function. so it was a bit fussy but quite doable obviously.

As far as the standard units go, I think the choice is yours as long as the finish is kept.

Click to expand...

i got the thinner alloy pressure plate from RGM and one of the thicker type steel plates which i had ground down to get the stack height right. The steel plate sits against the pressure plate so the alloy surface will not wear as the steel plate is stationary as its moves with the outer clutch basket along with the pressure plate.