Established in 1998, China Xiaowei Bearing Co., Ltd. is a high-tech enterprise specializing in variable speed pulley manufacturer and design many kinds of bearings. We have a modernized staffs of tech research and fog machine development, ISO9001 certificated, and manufacturing adopts advanced domestic and foreign standards such as GB, API, JIS, DIN, BS, NF and ANSI.

Variable Speed Pulleys (VPS), Economical Fractional Horsepower (FHP) Pulleys combine all the cost-saving features of glass reinforced nylon with steel shafts and steel-clad flanges for greater wear resistance. Speed range is infinitely variable within standard ratio limits. All pulleys are spring-loaded and color-coded to indicate spring pressure. We also offer Precision Variable Speed Pulleys featuring close tolerances on round shaft, molded keyway, and precisely ground and polished shafts.Standard sizes and types, dimensions and spring pressures are listed below. All Variable Speed Pulleys are supplied with setscrews.

SIMPLABELT - long the trade name for well-proven variable-speed belt drives.
Type 11.213
The core of this pulley type is the design of the sliding fit. A coated hub in the form of a four-sided polygon with pulley flanges of diecast aluminium is used nowadays in the compact units
The benefits of so doing are:
Large torque transmission, i.e. no excessive load
Self-centring owing to symmetrical backlash compensation, i.e. the pulley slides do not tilt
Silent running
Maintenance-free
Long service life
Type 11.101
Power range 0.37 - 18.5 kW at n1=1500 RPM. The tensioning needed for power transmission is exerted in this type by pulley springs centrally installed on both sides of the pulley flanges.
Type 11.104
Power range 0.37 - 3 kW at n1=1500 RPM. The tension required to transmit power is exerted here by cylindrical pressure springs rotationally symmetrically installed on both sides of the pulley flanges. The variable speed pulleys are life-lubricated and maintenance-free