Re: The right plastic compound [TANKS]

["chris barthelson" <barthelson88-at-hotmail.com>]

>By the way, how did you manage to get all of the teeth on the original to 
>be exactly the same >distance apart?

Divide 360 by the number of teeth (my case 11) and that's where the center 
of each tooth will be, ie 360/11=32.72 so each tooth will be 32.72 degrees 
apart. Then make all the teeth an equal thickness and then measure 
in-between them to determine the cleat width. I did mine on corel draw 
because you can type in the angles and dimensions. Then when you cut your 
tracks the angle of the inner cleats will be half of the tooth angle, ie 
32.72/2=16.36, then set your table saw or what ever your using to this angle 
and they should mesh nicely.

>And how did you make the original drive sprocket, did you use a CNC 
>machine? Because I havnt >got access to a CNC and am open to suggestions to 
>making a perfect sprocket to make my mold.


CNC?????!!!! I used a jig saw mounted upside down in a bench....... I glued 
the printout of the sprocket from corel onto the balsa wood and then just 
cut around it. After that prepare to sand for next 5-6 hours to fine tune 
the shape to an original inner cleat, so that all the spacing and angles are 
right.

>Thanks again.

No probs...

Chris"Jigsaw"Barthelson

PS the pic is the balsa original, no need to use a strong wood if your just 
casting them anyway, much easier to use balsa.

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