TB Wood's 8S158 SURE-FLEX Type S Flanged Belt Pulley

Description:

The TB Wood's 8S158 SURE-FLEX Type S Flanged Belt Pulley is used in industrial power transmission systems to connect rotating shafts while transmitting torque and accommodating shaft misalignment in flexible coupling assemblies. Commonly installed in pumps, compressors, conveyors, fans, blowers, mixers, and other heavy-duty industrial machinery. Maintenance teams, OEMs, and system integrators use this Type S flanged coupling hub for equipment replacement, drive system maintenance, machinery retrofits, and new power transmission installations.

Applications:

The TB Wood's 8S158 SURE-FLEX Type S Flanged Belt Pulley is commonly used in industrial automation environments including conveyor systems, pump and compressor drives, HVAC equipment, material handling machinery, mining operations, and manufacturing production lines where reliable torque transmission, vibration damping, and flexible shaft alignment are essential. Designed for use with Sure-Flex® elastomer sleeves, it provides maintenance-free operation while minimizing shock loads and protecting connected equipment.

Technical Specifications:

• Manufacturer: TB Wood's (Regal Rexnord)
• Model / Part Number: 8S158
• Product Type: Sure-Flex® Type S Flanged Coupling Hub
• Coupling Series: Sure-Flex® Plus
• Coupling Size: 8
• Bore Diameter: 1-5/8 in.
• Bore Type: Finished Bore (BTS) with Keyway
• Keyway Size: 3/8 × 3/16 in.
• Material: High-Strength Cast Iron
• Outside Diameter: 5.45 in. (5-29/64 in.)
• Hub Diameter: 3-1/4 in.
• Hub Length: 3/4 in.
• Length Through Bore: 2-3/32 in.
• Setscrew Size: 3/8-16 UNC × 5/8 in.
• Maximum Operating Speed: 4,500 RPM
• Mounting: Shaft Mount with Keyway and Setscrew
• Compatible Sleeve: Sure-Flex® Size 8 EPDM, Neoprene, or Hytrel® Sleeve
• Application Environment: Industrial power transmission systems

Common Replacements:

• TB Wood's 8S158
• Dodge 8S158
• Lovejoy 8S158