Adjustable V-Belt Pulley (Variable Speed Sheave) - Cast Iron EN 1561 - Stepless Transmission

High-quality adjustable V-belt pulleys designed for stepless speed variation in industrial machinery. 

Manufactured from high-grade cast iron according to EN 1561 standards. Allows for precise speed adjustments 

without stopping the machine or disassembling the drive system. Ideal for lathes, drill presses, and conveyors.

Product Overview:
Our Adjustable V-Belt Pulleys (also known as Variable Pitch Pulleys) offer a cost-effective solution for variable speed drives. 

By simply adjusting the distance between the two halves of the pulley, you can change the effective pitch diameter, 

thereby altering the output speed smoothly and continuously.

Key Features & Benefits:
-   Stepless Speed Control: Achieve infinite speed ratios within the working range without changing belts or gears.
-   Operation Efficiency: Speed can be adjusted while the machine is running (under load), minimizing downtime.
-   Durable Material: Made from superior Cast Iron (Grade EN 1561 / GG25), ensuring high wear resistance and long service life.
-   Precision Machined: Grooves are machined to strict tolerances to ensure smooth belt operation and reduce vibration.
-   Easy Installation: Designed to fit standard shafts with keyways (specify if you offer Taper Bush or Pilot Bore types).

Technical Specifications:
-   Material: Cast Iron (EN 1561)
-   Type: Adjustable / Variable Pitch / Split Pulley
-   Belt Type: Compatible with SPZ, SPA, SPB, belts. Click here for details.
-   Outer Diameter Range: [e.g., 84mm - 187mm]
-   Bore Type: Pilot Bore / Taper Lock / Finished Bore
-   Surface Finish: Black Oxide / Painted / Phosphated
-   Application: Industrial fans, pumps, agricultural machinery, machine tools.

Q&A：
    -   Q: How does an adjustable V-belt pulley work?
        A: It consists of two conical halves. Moving them closer or further apart changes the groove width,  

forcing the belt to ride higher or lower, effectively changing the pulley's diameter and speed ratio.
    -   Q: What material is this pulley made of?
        A: It is made of high-strength Cast Iron compliant with EN 1561 standards.