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Author Topic: Correct wheel sizes, from older pizza cutters to appropriate replacements?  (Read 934 times)

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Offline red_death

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Most Mk2s ran on B4 or B5 bogies didn't they? In which case should be 6.2mm not 7mm.



Offline woodbury22uk

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For privately owned freight stock the standard wheelsize from the late 1960s to the late 1980s was 37.5 inches (953mm). This applied to prototype private owner freight stock with pedestal suspension, leaf spring suspensions and 3 piece (Gloucester/ESC/ etc.)/axle motion/Schlieren/GPS bogies. The standard wheel has a new diameter of 953mm (6.44mm) and a half worn diameter of 915mm (6.18mm). International/continental Y25 and LHB-type bogies typically have new wheels which are 920mm (6.2mm) and half worn 895mm (6.05mm). Bob Davies' 6.2mm suits both these in either half worn from 953mm or new 920mm condition. But I am fairly sure that model manufacturers have compromised on wheel diameter especially so the deeper flanges do not contact underframes.

This post has been corrected to describe the half worn diameters of the wheels, which I had wrongly described in the original post.
« Last Edit: April 17, 2018, 10:57:12 am by woodbury22uk »
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Offline Papyrus

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Blimey! I never thought my simple question about what the wheel size meant wasn't quite so simple after all!

Thanks for the very informative replies.

Cheers,

Chris
Sometimes I sits and thinks. Sometimes I just sits.

Offline koyli55002

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Looks like the initial enquiry "steamrollered" a bit ?????

Offline woodbury22uk

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I have made a couple of corrections to the meaning of the figures in post #16 above. I had described the half worn diameter as the fully worn diameter.
Mike

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