Belt Grinder Wheel Set 7.8 Inch Drive with 7/8" Bore 5" Track 2.5" Idler

Belt Grinder Wheel Set 7.8 Inch Drive with 7/8" Bore 5" Track 2.5" Idler
CNC machined from Aluminium 6061

Wheel Set Description 

One (7.8 inches) Diameter Drive Wheel - 2 inches wide: 

The drive wheel is CNC machined with a 7/8 inch bore (H7 tolerance).  Bore is equipped with a 3/16" keyway and a set screw. The surface of the wheel is truly crowned to insure the belt won't jump off the wheel. Please refer to the wheel's sketch for the exact wheel dimensions - Bore length is (1.57") 

Two x 65 mm (2.5") diameter Idler Wheels - 2 inches wide: 

Each wheel is fitted with Four 1/2 inch 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 5 inches diameter Track Wheel - 2 inches wide: 

Large Tracking wheels adds considerable control and stability to the sanding belt (from experience)Each wheel is fitted with Four  1/2 inch 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)