OPTIBELT SPB 375X4 3525 V-BELT SHEAVE

Optibelt SPB 375mm 4-Groove V-Belt Pulley

Description

This is a robust V-belt pulley from Optibelt, model SPB 375X4, designed for use with a 3525 taper lock bush. With a pitch diameter of 375 mm and four grooves for SPB profile V-belts, it is engineered for demanding industrial power transmission applications. Its high-grade cast iron construction ensures durability, balance, and a long operational life.

Specifications

• Manufacturer: Optibelt
• Type: V-Belt Pulley (Sheave)
• Model: SPB 375X4
• Belt Profile: SPB
• Number of Grooves: 4
• Pitch Diameter: 375 mm
• Taper Bush Compatibility: 3525
• Material: Grey Cast Iron (EN-GJL-200)

Label Info

• Brand: optibelt
• Type: SPB 375X4
• Taper Bush: 3525

Application

Ideal for use in various industrial machinery, including conveyor systems, agricultural equipment, large fans, pumps, and compressors where reliable and efficient mechanical power transmission is critical.

Country of Origin

Manufactured in Germany.

CO2 Impact

By choosing this pre-owned pulley, you are helping to avoid the emission of approximately 59.0 kg of CO2. This is comparable to the savings from driving a standard car for 295 kilometers.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

What is the correct procedure for mounting this SPB 375X4 pulley with a 3525 taper bush?

Ensure the bore of the pulley and the outer surface of the taper bush are clean and free of oil or grease. Insert the bush into the pulley, aligning the holes. Lightly oil the threads of the grub screws and insert them. Slide the assembly onto the shaft, position it, and then tighten the screws alternately and evenly until the specified torque is reached, ensuring the pulley runs true.

How do I check for wear on the grooves of this V-belt pulley and when should it be replaced?

Use a groove gauge specific to the SPB profile. If the gauge touches the bottom of the groove, or if there is visible damage like scoring, corrosion, or a polished appearance (‘dishing’), the pulley is worn and should be replaced. Worn grooves cause belts to slip and wear out prematurely.

Is this pulley statically or dynamically balanced, and for what rotational speed is it rated?

Pulleys of this size are typically statically balanced to grade G6.3 according to ISO 1940. They are suitable for belt speeds up to 30 m/s. For higher speeds, dynamic balancing is required. Always consult the manufacturer’s data sheet for specific operational limits.

Last Update: Friday, March 13, 2026

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