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Posted by David Powell on September 5, 2008, 11:22 am
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uk.rec.models.engineering wrote:
>Boo wrote:
>>> However the surpise was that there were no grooves left on the
>>> crankshaft pulley. The pulley ressembled a flat belt pulley with only
>>> an occasional slight impression of where the bottom of a groove had
>>> been. All the other driven pulleys were OK and what remained of the
>>> old belt also still looked like a poly V belt. The garage people had
>>> never seen anything like it and we are left wondering how the grooves
>>> had, effectively, been ground off the pulley.
>>
>>
>> More likely the grooves were never there ? It is a Citroen after
>> all... I've had 3 in the past (2 * BX + 1 * Xantia) and although they
>> had some definite advantages (esp the better of the 2 BXs) I eventually
>> swore off them on grounds of unreliability + servicing costs.
>
>I agree. It takes a long time and many belts to wear out pulleys. I have
>a pair of cast iron V-belt pulleys which were in use for several hours
>daily for 50+ years, and the wear to the grooves is only just
>noticeable. I also think (but am not completely certain) that I've seen
>poly-V belts running on pulleys without grooves in washing machines. The
>grooves are most important on small diameter pulleys.
>
>Best wishes,
>
Dunno, those continentals have funny ideas about belts, etc. I once
bought a Holzer vertical panel saw at a silly price. Took me about a
fortnight to rewire and rebuild the control box so that it worked
(two dimensional X,Y motion). Lasted about 2 years. The 5hp saw
moved vertically on a carriage positioned by ~3/32" stranded steel
wire over aluminium pulleys. Guess what?? The wire sawed thro' the
pulleys. I did get it dismantled with great difficulty, gave up
trying to get all the bits back together.
Regards,
David P.
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> crankshaft pulley. The pulley ressembled a flat belt pulley with only
> an occasional slight impression of where the bottom of a groove had
> been. All the other driven pulleys were OK and what remained of the
> old belt also still looked like a poly V belt. The garage people had
> never seen anything like it and we are left wondering how the grooves
> had, effectively, been ground off the pulley.