Quote:
Originally Posted by Teched3
They can be ordered from McMasters-Carr. Check the clearance depth with a toothpick to get a handle on the length needed, starting with your frame thickness, and checking each hole depth. We ordered nuts as well, so we could chase the threads if we needed to reduce their length. Put a nut on first before cutting. this particular application is very tolerant of spacing, but try to make the center hole an accurate size for the motor centering boss. If I remember correctly, It was a D drill, with minor deburring. test in some scrap first. 
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Sorry if I misled anyone on the drill size to center the Tetrix motor. Sanddrag is correct - 25/64" is the closest size. Must have had a Senior Moment! We made spacer bushings to go around the boss, so we could drill out the hole large enough to pull the motor/ driveshaft assembly out quickly just in case a motor failed on us. This info might be especially useful to those that pressed a driveshaft over the pinion gear. Not neccessary if your driveshaft diameter is less than .3906 in.
