Re: [DML] Re: WANTED: Angle Drive
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Re: [DML] Re: WANTED: Angle Drive

Duplicating my post on the UK DOC forum

 From a design standpoint they're a bit wierd - 8 turns of the wheel to 
9 turns of the cable. I know Speedograph did have some left over but 
sold them to the US long ago and wanted a lot to remanufacture them in 
small quantities

The actual 8:9 ratio AND the direction of o/p rotation is what causes 
the problem. You can't do that in a single stage with normal gears 
which'll take plenty of torque - it can only be done with what are 
called screw gears. Look up any gear manufacturer's catalogue and 
they'll all state "low torque applications only, very susceptible to 
contamination" or words to this effect.

It could be done with a little gearbox and a pair of bevel gears doing 
the 90-degree bit, but that'd be $$$ to replace a part that's relatively 
cheap and easy to replace. I'd be happy to just replace mine every 
couple of years....

...if they had any.


David Teitelbaum wrote:

> I have never actually seen the gears. I am only going on what I have
> been told and have heard about. If, in fact, the gears ARE metal
> origionally it only reenforces my opinion that if the angle drive
> fails it is NOT a fault of the angle drive but a problem somewhere
> else in the system. Making the angle drive "stronger" is not going to
> fix the problem (especially of it always HAD metal gears). If you have
> an angle drive fail then just replacing it just means that the new one
> will fail too. I guess the story of plastic gears is just like many
> other "urban legends".
> David Teitelbaum
> vin 10757

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