Re: Some Observations... [TANKS]

["Marc en Wendy" <marcmethorst-at-zonnet.nl>]

Bart wrote:

> How thick material was being used on the teeth and what size screw?

The teeth were cut out of 30 mm plywood, the base was 30 x 25 mm. The 
woodscrews were 3 mm thick.

> personally I had planned on using soild wood teeth (cause I got a 
> trucklaod of rough cut poplar for free) and pre drillingthe holes to keep 
> it from spliting.

That should be fine, make sure to drill the hole bigger then the screw! I 
drilled a 2 mm hole for a 3 mm screw. It was sufficient for attaching them 
to the track, but a solid wood tooth with pre-drilled bigger hole will 
certainly be better.

> what are you using to attach the plastic teeth to the treadblock?

I used a machine screw (think that's what you call it) M6 and a nut M6 
(metric thread, 6 mm). The hole in the plastic was drilled 7 mm and 
countersunk on top of the tooth. The screw is placed with the slotted head 
in the countersunk part of the tooth, with the nut inserted on the also 
countersunk trackpad. This to enable changing the parts of the track when 
the track pads (and thus the nut) have worn out. If you do it the other way 
around the wear of the head of the screw would make it impossible to unscrew 
the teeth. (see attached photo) I locked the nuts with Loctite.

Marc

tandje.JPG