re:Re: cleaning, lovejoy, black box tach, linear scales, making pulleys

Jon wrote:

>Yes, but the circular arc section for the tooth face is not the right
>shape for most toothed belts. I guess the HTD belts have rounded
>'teeth', but they probably have a greater tendency to climb the cogs
>under high load.

Jon,

The tooth profile for HTD style is parabolic and is DESIGNED
to "load" into a semicircular pulley groove. This helps to eliminate
the "climbing" of conventional "trapezoid" belts. MOST modern HI-load
belts (like propellor reduction units in aircraft 300HP+)use the
newer tooth style.

Gates belts cut out part of the middle of the hump of each tooth.
They claim better performance... I think it's just to avoid patents,
market differentiation, etc.

I am a HUGE believer in this tooth style (compared to trapz) I've
changed all mine and recommend it whenever I can :-)

Hope this helps.

Ballendo