1. Product Description

The pulley is a key component of belt drive systems, transmitting power through belts and widely used in various mechanical equipment. Our pulleys are manufactured with high-precision casting or machining processes, offering excellent dynamic balance and smooth, reliable transmission. The surface is treated for corrosion resistance, and various finishing options (black oxide, zinc plating, painting, etc.) are available to suit different working conditions.

2.Product Type

We offer several types of pulleys to meet different transmission requirements:

1.Chinese Standard SP Series / Classical V-Belt Pulley: Manufactured according to GB/T 10412, groove types include SPZ, SPA, SPB, SPC, etc.

2.Custom Non-Standard Pulley: Machined according to customer drawings or samples; materials can be cast iron, steel, aluminum alloy, etc.

3. Technical Data

4. Main Functions of Pulley

1.Power transmission: Transmits motor power to the driven load through belt friction or engagement.

2.Speed and torque conversion: Different pulley diameters allow speed reduction/increase and torque adjustment.

3.Shock absorption and damping: The belt-pulley combination absorbs vibrations and protects equipment.

4.Overload protection: Under proper design, belt slipping can act as an overload safety feature.

5.Guidance and alignment: Precision-machined grooves keep the belt running stable without tracking off.

5. Applications

Our pulleys are widely used in the following industries and equipment:

1.Industrial fans, water pumps, air compressors

2.Agricultural machinery (harvesters, tractors, dryers)

3.Mining and crushing equipment

4.Textile machinery, printing machinery

5.Woodworking machinery, food machinery

6.Electric motors, generators, gearboxes

7.Automotive engine accessories (multi-ribbed pulleys)

8.Automation equipment, packaging machinery

6. Quality Control & Testing

All pulleys undergo strict inspection before shipment:

1.Material chemical analysis (spectrometer)

2.Hardness test (Brinell/Rockwell)

3.Dimensional accuracy: bore diameter, groove angle, groove pitch, runout

4.Dynamic balancing test: standard G6.3, up to G2.5 available

5.Taper bush fit inspection: contact area ≥85%

6.Surface roughness and anti-rust coating test

7.Visual inspection: no blowholes, sand holes, cracks

7. Why Choose Our Pulleys

1.High precision machining: CNC lathes with dedicated pulley groove tools ensure consistent groove angle and pitch diameter.

2.Excellent dynamic balance: Reduces vibration, extends bearing and belt life.

3.Reliable materials: High-quality cast iron or steel, wear-resistant and impact-resistant.

4.Taper bush advantage: Easy assembly/disassembly, good concentricity, no shaft damage.

5.Strong customizability: Non-standard sizes, special materials, surface finishes available.

6.Fast delivery: Standard molds in stock, short lead time for batch production.

7.Strict testing: Every batch undergoes balancing and dimensional inspection.

8. Workshop & Warehouse

1.Workshop: Equipped with CNC lathes, dedicated pulley groove milling machines, dynamic balancing machines, drilling & tapping centers; ISO 9001 quality management system in place.

2.Warehouse: Separate areas for raw castings, semi-finished parts, finished pulleys, and taper bush accessories; ERP-managed inventory ensures sufficient stock and fast dispatch.

9. Package & Delivery

Packaging:

Inner: Anti-rust oil coating + plastic film wrapping

Outer: Export-grade plywood cases or reinforced cartons with foam or partition boards to prevent collision

Large pulleys: Steel pallets with stretch film

Delivery:

Standard sizes in stock: 1–3 days

Custom orders: 7–15 days (depending on quantity)

Shipping methods: sea, air, rail, or express courier