This is an extra heavy-duty plain back, tandem roller assembly used by Kawneer on their heavy doors. Often found in Hawaii used on door walls, it has an in-line tandem inner housing with 1-1/2 inch concave or grooved steel ball bearing rollers set in a heavy-duty diecast outer housing with rear adjustment. The housing is 1-13/16 inch tall and 1-1/8 inch wide and is held in place by screws from the top as well as the end.
- Used by Kawneer patio doors
- 1/4-20 Machine screw mounting on top of housing
- 1-1/2 inch diameter concave steel roller
- Diecast housing construction with ball bearing roller
- Features rear screw adjustment
