4 Inch Dual Groove Pulley for Mechanical Power Transmission and Air Compressors Beefy Cast Iron 2 Belt B Section 5L Pulley with 1 Inch Bushing Solid Steel Build for Heavy Duty Drive

4-Inch Dual-Groove Cast Iron Pulley with 1" Bushing for B/5L
✔️ 1x 4 inch dual-groove pulley with 1" H bushing for 1" shaft

This 4-inch dual-groove pulley is built from high-strength cast iron and includes a solid steel H bushing, designed for a secure fit on a 1" shaft. It's intended for heavy-duty drive applications such as mechanical power transmission and air compressors, supporting B section (5L) belts with reliable engagement.

✅ 4" OD dual-groove pulley; two-piece cast iron construction
✅ Includes solid steel H bushing for 1" shaft
✅ Accepts B section (5L) belts; compatible with A section (4L) but depth shifts
✅ Durable fatigue-resistant design for heavy-duty drives

💡 What is a pulley used for in power transmission?

Pulleys guide belts to transfer motion and set speed ratios between shafts.

- They redirect belt paths to fit layouts
- They help maintain proper tension and reduce belt wear
- They support reliable operation in compressors and other drive systems
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