>>
     >> Paul,
     >>
     >> I'm looking for a cad (dxf) profile of the V grooves for
    multi-groove
     >> belts. Is this something you have?
     >>
     >> Thanks
     >> Ken Bauman
     >>
     >> No but I have a multi V grove pulley set from McMaster Carr
     >> I will be using on the turbo compound engine.
     >> In .92 inches of width there are 10 grooves.
     >> The depth is about .090". Hard to measure exactly. I might
     >> be able to take it over to the machine shop and put it on
     >> the optical comparator if it is real important to you.
     >>
     >> This looks like a much finner pitch than the units used
     >> on the new car engines to drive the water pump and
     >> alternator. I don't have any of those lying around.
     >>
     >> When I drew it I did not take the trouble to model
     >> it exactly.
     >>
     >> Paul Lamar ...No rotor no motor.
     >
     > Machinist Handbook has them, I don't have a
     > scanner, however I might be able to take a picture
     > and send that. Not sure on the page either, but
     > I'll look it up tomorrow.
     >
     > Jarrett
     >
     > I have Mac Hinnery's hand book.
     >
     > Here it is.
     >
     > Paul Lamar ...No rotor no motor.

    Thank you

    Ken

    Ken, I think this is the web site you are looking for.

    -------------------------

    I take it back. That Gates web site sucks. Who ever heard
    of having to register before you can download a pdf catalog.
    The on line catalog is ridiculous as well. Sometimes these
    people shoot them selves in the foot.

    Here is a better one.

    http://www.cptbelts.com/products/vribbed/vee_rib/index.html

    You want a 3D DXF or a 2D DXF ?

    Paul Lamar ...No rotor no motor.

------------------------------------------------

Paul,

Hutchinson is a good source of info for Poly V belts:
http://www.hutchinsontransmission.com/

They will mail you a design manual on request, which includes detailed
tech info and a calculator for sizing.


Regards,

Gordon.


Thanks Gordon. I bought some cast iron pulleys from Mac Master but
I am not happy with them. The three inch pulley weighs 1.5 pounds
with QD bushing and has an RPM limit of 8340. The 4.5 " large one
weighs 2.75 pounds and has an RPM limit of 5560 making it marginal
for this application. See the chart for the design point. I think
I could do better if I found some steel sheet metal pulleys as found on
most automotive engines these days. These are J section pulleys and
most automotive engines use the L section belts I suspect.
The L section however looks marginal as far as RPM is concerned for
the stock RX8 engine with a red line of 9,000 RPM.
This chart is probably rather conservative.

Paul Lamar ...No rotor no motor.

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