PGT Tandem roller assembly with 1-1/2" nylon wheels with precision bearings. Steel housing. Also used on Kinco sliding doors.
MBB Series Precision Bearing Nylon Wheels. This is an upgraded Nylon wheel that is assembled with a precision bearing as in the ABB Series. The Nylon tire is injected with fiber glass reinforced Nylon. The competitive advantages of this wheel are similar to those for the ABB Series.
-Extremely smooth rolling.
-Less operating force (motion to open/close).
-Less noise and vibrations.
Higher Load capacity of 65 Lbs. per wheel (compared to 45 Lbs. per wheel on a regular Nylon wheel).
The Precision Bearing is factory greased and completely sealed
