Author Topic: Crankshaft material  (Read 1423 times)

Offline A10Boy

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Crankshaft material
« on: 30.03. 2010 20:19 »
Hi Team, does anyone know the spec of the steel which the A10 large journal crank was made from please ?

I need it for the company who are looking at my spline repair.

Cheers

Andy
Regards

Andy

1958 Super Rocket
Plus
1974 Kawasaki Z1a
Yam XJR 1300

Offline Desburnett

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Re: Crankshaft material
« Reply #1 on: 30.03. 2010 22:36 »
EN 40B

Offline MG

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Re: Crankshaft material
« Reply #2 on: 31.03. 2010 21:23 »
Interesting, I hadn't thought that such detailed information was still available today.

EN 40b would be S235 carbon steel, isn't it?
1955 A7 Shooting Star
1956 A10 Golden Flash
1961 Matchless G12 CSR

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Offline A10Boy

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Re: Crankshaft material
« Reply #3 on: 01.04. 2010 11:52 »
Cheers

 *smile*
Regards

Andy

1958 Super Rocket
Plus
1974 Kawasaki Z1a
Yam XJR 1300

Offline terryk

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Re: Crankshaft material
« Reply #4 on: 02.04. 2010 14:59 »
Hey show us a pic when you get the spline repaired. I have to do one myself at some stage.
1950-53 A10 rigid/plungers, 1958-61 A10 super rockets, 1947-50 A7 longstrokes, 1949 Star twin,
1951-54 A7 plungers, 1940s M21, WDM20s,
1948-50s B33s rigid/plunger/swingarm, 1948-50s b31s rigid/plunger/swingarm

Offline Desburnett

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Re: Crankshaft material
« Reply #5 on: 03.04. 2010 09:29 »
If its done correctly you shouldn't be able to see any difference in a repaired crank than an original.

The machine shop should mill out the existing splines to beond the wear band, lay down a deposit of nickel chrome weld, anneal. Turn to original diameters, re machine splines to original dimensions and possibly flame harden/temper the finished end depending on the ability to machine in the hardened or annealed state.

Des