The SEW Eurodrive EV 31B Variable Pulley Drive is a component designed for speed adjustment in mechanical power transmission systems. This unit, identified by part number 1277871, is part of the EV series, commonly integrated into machinery requiring precise and variable speed control. Its construction facilitates mechanical speed variation through the adjustment of pulley diameters.

Technical details

• Series: EV 31B
• Type: Variable Pulley Drive
• Gear Ratio: 1:6 (nominal, subject to pulley adjustment)
• Shaft Diameter: 28mm
• Mounting Configuration: Designed for direct mounting or integration into existing drive trains.
• Operational Principle: Utilizes variable diameter pulleys to achieve mechanical speed changes.
• Construction: Robust build suitable for industrial environments.
• Compatibility: Designed to interface with standard motor shafts and driven equipment.

Applications & compatibility

This SEW Eurodrive variable pulley drive is frequently employed in applications demanding flexible speed control without the need for electronic variable frequency drives. Common uses include conveyor systems, packaging machinery, textile equipment, and other industrial processes where manual or mechanically controlled speed adjustments are beneficial. Its 28mm shaft diameter ensures compatibility with a range of standard motor outputs.

Available from Industrial Automation Co as new, refurbished, or surplus stock, backed by a 2-year warranty with same-day shipping on in-stock items. Request a quote for the SEW Eurodrive 1277871 or contact our technical team for cross-reference assistance with compatible EV series components.