Contact Us


Mail:[email protected]

Add:No. 2, Longshen Cdc, Sandun Town, Hangzhou, Zhejiang, China

  • Belt Sheaves

    Belt Sheaves

    We supply hobbyists, students, distributors and a wide variety of OEMs with high-quality machined timing belt pulleys and molded pulleys at affordable prices. SDP/SI offers a broad range of off-the-shelf inch and metric timing belt pulleys. Aluminum, steel or plastic pulleys...

  • Belt Pulley Wheel

    Belt Pulley Wheel

    Design your belt drive system using our Center Distance Designer. This calculator computes belt lengths for various center distances and checks the number of teeth in mesh for both pulleys. It calculates pulley drive ratios and the minimal center distance for a designated...

  • Wire Pulley

    Wire Pulley

    One of the most important parts of a lift system consisting of a series of pulleys and wires or ropes is the sheave block. This component guides the wires or ropes in the system, helping to make the work of lifting heavy items easier.

  • Driven Pulley

    Driven Pulley

    The pulley is made from a high grade aluminum. We offer a variety of pulleys on our site, including pulleys for different belt types, different belt sizes, colored pulleys, and outside diameters. This allows for different mechanical transmissions where torque is increased for...

  • Brass Pulley

    Brass Pulley

    This miniature precision motion control pulley is made of brass and is mounted to a double-shielded ball bearing made of 400-series hardened martensitic stainless steel.

  • Metal Pulley

    Metal Pulley

    service. For larger volume orders, we can mold and machine custom options. Compared to similar pulleys, Multi Ribbed pulleys offer smoother running and can run at higher speeds thanks to their multi ribbed design. This design also offers low inertia.

  • Motor Sheave

    Motor Sheave

    There have been times when the set screws on the motor pulley or gear case pulley have worked loose, allowing the pulley to slip on the shaft. If this occurs, realign belt and tighten set screws as tight as possible.

  • Multiple Pulleys

    Multiple Pulleys

    They have been designed for light weight applications only and are available in either a horizontal or vertical configuration. Up to 24 lines can be accommodated. Ceiling, wall, or pipe mounting available. Mule sheaves are equipped with 3" diameter sleeve-bearing wheels and...

  • Stainless Pulley

    Stainless Pulley

    Our collection of commercial pulleys and hardware is ideal for drop down pulleys and industrial applications. We have a variety of styles that are suitable for various purposes such as feed and water lines, through-the-wall applications and heavy-duty cable and winching.

  • Steel Pulley

    Steel Pulley

    Stainless Steel Pulley. The maximum load of this pulley FAR exceeds the weight capacity of our mast system. This pulley can accept rope up to 1/4 inch in diameter, but is perfect for use with our 1/8 inch Black Dacron rope.

  • Flat Mount Pulley

    Flat Mount Pulley

    A flat mount pulley block with double sheave pulley block is used when an application needs multiple sheaves in lifting up a load but no rotation is required in the block which affects the wire rope. It can be mounted using a rod, bolt, shackle or on a custom mounting.

  • Nylon Pulley

    Nylon Pulley

    Lightweight: Very low start/stop inertia. Less strain on all drive components with smooth, efficient operation. Cost-Effective: Economical and competitively priced. High-Quality Construction: Nylon 33% glass fill and metal combination. Technical Data SheetNoise Reduction:...