Berges® Spring Tensioning pulley type F211.47sb interchange with Lenze® Simplabelt size 11.104.40.6.1. for use with wide belts type CW-b 47 and fixed diameter pulley, speed change achieved by changing center distance between sheaves. Diameter 270mm with length through bore of 130mm, one spring on each side of pulley for a total of two springs. Maximum shaft diameter 28mm with standard bores listed for sale, bores 28, 38, and 42mm are found with F250sb series, for alternative bores are available contact TVT for non-standard bore quotation.
| Brand | Type | Belt | a H7 | b | dw | Dw | Da | L |
| Lenze | 11.104.40.6.1 | 47x12 | 28, 38 | 145 | 94 | 263.5 | 270 | 148 |
| Berges | F211.47sb | 47x12 | 19, 24, 28 | 98 | 74 | 217 | 220 | 130 |
| Berges | F250sb | 47x12 | 28, 38, 42 | 106 | 89 | 250 | 255 | 170 |