Metric Gear sources

[mcfridge]

Hey everyone,

I'm doing up a drawing set for a machine that came into our shop, but I don't know where to find information on the gearing.

I know they are metric gears, but the only information I have on them are: the gear has 72 teeth and an approximate outside diameter of about 14-1/2", and the pinion has 18 teeth and an OD of about 4". I'd like to keep these dimensions somewhat similar, but the dimension I need is that the center to center distance of the gears has to be 225mm.

If it matters both of the gears have hubs on each side and keyways, but we can probably put that in after. Thanks for your help.

 

[prohammy]

Try having a look at this website.

http://www.hpcgears.com/

If you can't find it there then try Misumi

http://www.misumi-europe.com/eucatalogue/25.html

Kevin Hammond

Mechanical Design Engineer
Derbyshire, UK

 

[Cheddarcaveman]

A poor soul stuck between imperial and metric I see!!

Try this company in Italy - they do great work and will probably make one-offs.

http://www.cmr.it

 

[dimjim]

It is obvious that you have a 5 Module System.
The od of the 72 tooth gear would be
72 times 5 plus 10 equals 370mm or 14.567 inches.

The od of the 18 tooth gear would be
18 times 5 plus 10 equals 100mm or 3.937 inches.

These would operate on a 225mm Center Distance.

 

[gearguru]

Module=pitch dia/no of teeth
Center distance = (pitch dia1+pitch dia2)/2

Therefore:
Module = center distance/((no of teeth1+no of teeth2)/2)
module = 225/((78+18)/2) = 5

as already mentioned dimjim