SPZ3550 Wedge Belt

SPZ3550 Wrapped Wedge V-Belt (SPZ3550 Wedge Belt)

The SPZ3550 Wrapped Wedge V-Belt is a high-capacity, heavy-duty narrow wedge power transmission belt engineered to maximize drive performance and energy efficiency across industrial machinery. Featuring a high depth-to-width ratio wrapped in a durable, wear-resistant fabric jacket, the SPZ3550 delivers up to three times greater horsepower transmission capability than standard classical V-belts of equivalent width, allowing for more compact drive configurations and reduced pulley overhang loads.

Key Features & Performance Benefits

• High Power Wedge Profile: Deeper cross-section provides superior wedge action into sheave grooves, supporting substantially higher torque and speed ratios.
• Durable Fabric-Wrapped Jacket: High-density, rubberized textile wrap shields internal components against oil, heat, ozone, industrial dust, and abrasive wear.
• High-Tensile Cord Reinforcement: Prestretched polyester tension members ensure minimal elongation, excellent shock-load absorption, and dependable tension retention over long operating cycles.
• Smooth & Quiet Operation: Engineered for minimal vibration and quiet performance across high-speed industrial electric motor drives.
• Standardized Interchangeability: Manufactured in strict accordance with DIN 7753 Part 1 / ISO 4184 / BS 3790 / RMA IP-22 dimensional specifications.

Technical Specifications

• SKU / Part Number: SPZ3550
• Belt Section Profile: SPZ Narrow Wedge Profile
• Belt Construction: Wrapped High-Capacity Narrow Wedge Belt
• Datum / Pitch Length (Ld / Lp): 3550 mm (139.8″)
• Inside Length (Li) Approx.: 3512 mm
• Outside Length (La) Approx.: 3563 mm
• Top Width: 9.7 mm
• Belt Height / Thickness: 8 mm
• Groove Angle: 40°
• Standards Conformance: DIN 7753 Part 1 / ISO 4184 / BS 3790 / RMA IP-22

Common Applications

Widely utilized in high-power industrial drives, including heavy HVAC air handlers, chillers, industrial fans and blowers, centrifugal pumps, air compressors, crushers, aggregate processing machinery, and conveyor drives.