Clutch Assembly

[rgh0]

Clutch thrust bearings on 4 and 5 speed boxes are even more fun than the carrier for them

The original bearings used by Ford and Lotus were made by RHP I believe
Numbers as follows
4 speed -- 6/W 1 3/8 This has the flat platen to contact the flat platen on the original style pressure plate
ID - 34.6 mm this the 1 3/8 inch shaft inner fit in the bearing number
OD - 66.4 mm
Thickness between front and rear face - 14.25mm

5 speed -- 6/W 1.5057 This has the rounded platen to directly contact the diaphram spring fingers
ID - 38.2 mm This is the 1.5057 inch shaft fit in the bearing number
OD - 68.7 mm
Thickness between front and rear face- 15.6 mm

FKC of Japan made identical bearings under the same bearing numbers

The SKF 413708 has the rounded style platen and 38.2 mm ID to suit the 5 speed box carrier thus its listing as an alternative I believe.
ID - 38.2
OD - 63.7
Thickness - 15.5 mm

The SKF 307500 I dont have a sample of - what are its dimensions - they should match the flat platen bearing to suit the 4 speed ID of 34.6 mm if its a true alternative even if it has a rounded face that may wear more rapidly when contacting the flat platen

There are lots of no name thrust bearings sold by bearing companies and some of the usual suppliers which are cheap copies whose reliability is to be doubted. I try to avoid them


left to right in photo
Left - 5 speed FKC 6/W 1.5057
centre - 5 speed SKF 413708
Right - 4 speedFKC 6/W 1 3/8

cheers
Rohan

[john.p.clegg]

Rohan-A mine of information

Kev you have PM.

John

[512BB]

Left - 5 speed FKC 6/W 1.5057
centre - 5 speed SKF 413708
Right - 4 speedFKC 6/W 1 3/8

Don't forget the KFC bearing, its finger lickin good

Won't sign my name to this one

[Wevster]

What would I do with out you lot. Cheers.
Here's measurements of mine anyway. Slight bevel on new one.
See pic's

[Wevster]

Update, new release bearing, new pressure plate, a couple of washers under pivot bolt, and 5mm linished off new clutch plate. All fits together well, and adjustment good. Next job fit into car!!
Many thanks to everyone for your input.
I will keep you posted on the refit.

Cheers
Kev.

[gjz30075]

, and 5mm linished off new clutch plate.
.

Thanks for the pictures, but I'm not sure what you mean here?

[john.p.clegg]

linish
?l?n??/
verbtechnical
gerund or present participle: linishing
polish or remove excess material from (something) by contact with an abrasive moving belt.
"after mitring, the tube is cleaned, degreased, and then linished"