Sany Pulley Assy

The Sany Pulley Assy is a precision‑engineered rotating component that guides and supports wire ropes in Sany heavy‑duty truck cranes, crawler cranes, and all‑terrain lifting equipment.

This Sany Pulley Assy integrates a robust grooved slide wheel with a high‑capacity sealed roller bearing into a single factory‑matched assembly. When you need authentic replacement components, trust Sany Parts to deliver factory-original quality and precise fitment.

The Sany Pulley Assy is specifically designed for Sany STC‑series truck cranes, SAC‑series all‑terrain cranes, and large crawler cranes, ensuring smooth rope reeving, minimal friction, and reduced wire rope wear under heavy lifting conditions.

Sany Pulley Assy — OEM hoist rope guidance wheel assembly for Sany heavy lifting machinery and construction cranes

What is the Sany Pulley Assy?

The Sany Pulley Assy is a complete hoist rope guidance assembly that supports and redirects wire ropes in the hoisting mechanisms of Sany heavy lifting machinery. It is typically mounted at the boom tip, jib tip, or within the hook block, where it ensures that the hoist rope maintains proper alignment under load.

The Sany Pulley Assy assembly comprises two precision‑engineered components that function as an integrated rope guidance unit. The slide wheel (10587473) is the primary load‑carrying element, featuring a precisely grooved surface that guides the wire rope and prevents slippage during operation.

The roller bearing (B221500000221) supports the slide wheel on its shaft, providing low‑friction rotation even under the high loads encountered during heavy lifting operations. This bearing is permanently lubricated and sealed, requiring no regular maintenance.

The Sany Pulley Assy is a direct replacement for worn or damaged rope guidance components on Sany STC‑series truck cranes, SAC‑series all‑terrain cranes, and large crawler cranes with 4‑section or 5‑section telescopic booms. By using this genuine assembly, you ensure that the groove profile and bearing preload match factory specifications, eliminating rope abrasion and reducing the risk of hoist rope failure.

Product Parameters of Sany Pulley Assy

Technical specifications: The Sany Pulley Assy is engineered for use with wire rope diameters typically ranging from 16 mm to 28 mm depending on crane capacity. The slide wheel (10587473) features a precisely machined rope groove with a hardened surface (HRC 45‑50) that provides exceptional wear resistance against rope abrasion.

The roller bearing (B221500000221) is a sealed, permanently lubricated unit with a dynamic load rating matched to the rated lifting capacity of Sany cranes. The bearing is manufactured from E52100 chrome steel with a dust‑proof seal that prevents contamination ingress in dusty crane environments.

All components of the Sany Pulley Assy are manufactured under ISO 9001:2025 certification and are 100% traceable to original production batches. The assembly has been validated on Sany STC and SAC series cranes operating globally, demonstrating a field service life exceeding 10,000 operating hours under heavy‑duty lifting conditions when properly maintained.

Why Choose Our Sany Pulley Assy?

Complete 2‑Component OEM Kit — Perfectly Matched Components: The Sany Pulley Assy includes the slide wheel and roller bearing as a single, factory‑matched assembly. This eliminates compatibility problems that arise from sourcing individual components from different suppliers, ensuring that the groove profile and bearing preload match factory specifications for smooth, low‑friction rotation.

Hardened Groove for Reduced Rope Wear: The Sany Pulley Assy features a slide wheel with a precisely contoured rope groove that is induction‑hardened to HRC 45‑50, providing exceptional wear resistance against the continuous abrasion of the wire rope during lifting operations. The smooth groove finish reduces friction, extending both rope service life and pulley durability.

Sealed Roller Bearing for Maintenance‑Free Operation: The Sany Pulley Assy uses a permanently lubricated, sealed roller bearing (B221500000221) that requires no regular greasing. The bearing seals prevent dust and moisture ingress, maintaining low‑friction rotation even in the dusty crane environments.

Fleet‑Proven Reliability and Comprehensive Warranty: The Sany Pulley Assy is standard equipment on Sany STC‑series truck cranes, SAC‑series all‑terrain cranes, and large crawler cranes in over 100 countries. Fleet data shows that genuine Sany pulley assemblies deliver an average service life exceeding 10,000 hours—three times longer than generic aftermarket assemblies—while reducing wire rope wear by over 40%. The assembly is backed by a 24‑month manufacturer’s warranty covering groove wear, bearing failure, and material defects. Volume pricing, consignment stock, and global technical support are available for large fleets.

What are the Routine Maintenance Considerations for the Sany Pulley Assy?

Daily visual inspection before operation: Before each shift, inspect the Sany Pulley Assy for visible damage to the slide wheel groove, including scoring, pitting, or uneven wear. Check the rope groove for any signs of rope imprint or groove deformation that could cause the wire rope to misalign.

Lubrication — not required for sealed bearing: The roller bearing (B221500000221) is permanently lubricated and sealed, requiring no regular greasing. Do not attempt to inject grease into the bearing, as this may damage the seals. The slide wheel itself requires no lubrication.

Bearing rotation test and groove wear measurement — every 500 operating hours: With the crane unloaded, rotate the slide wheel by hand. It should turn smoothly without grinding, rough spots, or excessive resistance. If grinding is felt, the roller bearing (B221500000221) may be worn and should be replaced. Measure the depth of the groove using a rope groove gauge. If the groove has worn to a depth exceeding 15% of the original rope diameter, replace the entire Sany Pulley Assy.

Preventative replacement schedule — every 4,000 hours or 2 years: For high‑use cranes operating more than 2,000 hours per year, Sany recommends a full replacement of the Sany Pulley Assy every 4,000 operating hours or 2 years. Replace the slide wheel (10587473) and the roller bearing (B221500000221) as a set—even if no visible wear is apparent, internal fatigue cracking can occur without external signs. Keep a detailed maintenance log tracking bearing test results and pulley wear measurements. By following this proactive schedule, the Sany Pulley Assy can reliably exceed 10,000 operating hours.

The slide wheel (10587473) is the primary load‑carrying component of the Sany Pulley Assy. It is manufactured from high‑strength cast steel with a precision‑machined rope groove that is induction‑hardened to a surface hardness of HRC 45‑50. This hardening treatment provides exceptional wear resistance against the continuous abrasion of the wire rope during lifting operations. The pulley is then dynamically balanced to prevent vibration at high rotational speeds.

If the rope groove shows any wear that reduces the rope contact angle by more than 15 degrees, or if groove wall thickness wear reaches 20% of the original thickness, the slide wheel must be replaced. A worn groove can cause abnormal rope abrasion and may allow the rope to jump off the pulley during a lift, creating a serious load‑dropping hazard.

The roller bearing (B221500000221) is a sealed, permanently lubricated unit that supports the slide wheel on its shaft. This bearing type is selected for its high load capacity and ability to accommodate both radial and moderate thrust loads. The bearing is manufactured from E52100 chrome steel with a dynamic load rating matched to the rated lifting capacity of Sany cranes.

If the bearing becomes rough or noisy during rotation, it must be replaced immediately—a seized bearing can cause the pulley to lock, potentially damaging the wire rope and creating a load‑dropping hazard. The bearing seals should be inspected for damage; if a seal is torn or missing, replace the entire Sany Pulley Assy immediately, as contamination ingress will rapidly destroy the bearing.

For Sany cranes operating in extreme cold climates (below -25°C), special considerations apply to the Sany Pulley Assy. The roller bearing retains its pre‑grease properties down to -40°C, but the grease itself becomes more viscous and may cause slightly increased rotational resistance. Allow the crane to idle for 10‑15 minutes before full operation, and rotate the pulley manually several times before applying full load to ensure that the bearing rotates freely.

The Sany Pulley Assy is also available as part of a complete hoisting mechanism overhaul kit, which includes all pulley assemblies, wire ropes, and hoist cylinder seal kits. Sany recommends this complete‑kit approach for vehicles with over 10,000 operating hours, as it allows the entire rope guidance system to be renewed in a single service event, eliminating the risk of hidden bearing wear or pulley groove wear.

Fleet managers using this strategy report a 50% reduction in hoisting mechanism‑related breakdowns and a 40% reduction in total maintenance costs over the equipment’s life. Contact our parts specialists through the Get Quotation button above for custom kit configurations tailored to your fleet’s specific needs.