• One 100 mm diameter Drive Wheel: 

Drive wheel is CNC machined with 19 mm bore (H7 tolerace).  Bore is equipped with a 6 mm key way and a M6x20 mm set screw. Surface of wheel is truly crowned to insure belt won't jump off wheel . Please refer to the wheel's sketch for the exact wheel dimensions

• Two  50 mm diameter Idler Wheels: 

Each wheel is fitted with three 12 mm bearings. (Heavy duty 6201 RS bearings)  Bearings are rubber sealed to protect from dust. Bearings are placed back to back (best combination). A 10 mm wide standoff (sleeve) will raise the wheel of the mounting plate. This bearing combination is the best tested solution against bearing failure as it allow for tightening the mounting bolts without causing any axial force on the bearings (ball bearings should not bear lateral load)

• One 75 mm diameter Track Wheel: 

Each wheel is fitted with three 12 mm bearings. (Heavy duty 6201 RS bearings)  Bearings are rubber sealed to protect from dust. Bearings are placed back to back (best combination). A 10 mm wide standoff (sleeve) will raise the wheel of the mounting plate. This bearing combination is the best tested solution against bearing failure as it allow for tightening the mounting bolts without causing any axial force on the bearings (ball bearings should not bear lateral load)