Pulleys and Belts Perform at High and Low Speeds

HTD (high-torque drive) pulleys and belts have been added to the power transmission gear range from Ondrives. The timing pulleys start at 5mm pitch to suit 9mm-, 15mm- and 25mm-wide belts and are available with either a pilot or taper bore as standard. There are generally two or three executions depending on the number of teeth required, this is denoted in the catalogue. The 8mm and 14mm pitches are also standard to the range with many more executions (types) available in these sizes.

Belts go up to 85mm wide as standard, with larger ones available on request. Depending on the size chosen, HTD pulleys are either steel with zinc-plated steel flanges or cast iron and belts are glass-fibre reinforced, rubber back/teeth with nylon fabric tooth facing to DIN/ISO 5296. A range of taper bushes are also available to suit these timing pulleys when required in sintered iron.

High-torque drive pulleys and belts enable a low belt tension and bearing load, wide power/speed range, low maintenance, small space requirements and smooth constant running speeds, which ensures they are suitable for very low as well as high speeds. Detailed technical data on these products is available from the Ondrives website or the company's catalogue, which ranges from power ratings for the various different sizes, fatigue factors and load factors to pre-tension advice and overall service factors.

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