Continental Contitech 20039564 BX51 Cogged V-belt Bx Section

Product Description

The CONTINENTAL CONTITECH 20039564 is a BX-section cogged V-belt designed for demanding power transmission applications in HVAC, agricultural, and industrial equipment. Constructed from Fiber Reinforced Vytracord, this Torque-Flex belt features a cogged profile that reduces bending stress, increases flexibility, and improves heat dissipation compared to standard wrapped belts. It measures 54.0 inches outside length with a 52.80-inch internal length and weighs 0.6 pounds. The oil-resistant compound makes it suitable for environments where incidental fluid exposure is likely.

This BX51 belt is used in belt-driven blower assemblies, fan drives, compressors, and pump systems found in residential and light commercial HVAC units, as well as general-purpose industrial drive applications. The cogged construction allows use on smaller sheave diameters without the excessive heat buildup common in solid-back belts, making it a preferred replacement in high-cycle or high-load drive systems. HVAC technicians and mechanical contractors are the typical installers for this type of belt.

Key Features

• Cogged BX-section profile reduces bending resistance and extends belt service life on smaller pulleys
• Fiber Reinforced Vytracord construction provides high tensile strength and dimensional stability
• Oil-resistant compound withstands incidental exposure to lubricants and fluids
• Wide operating temperature range from -40 degrees F to 140 degrees F (-40 C to 60 C)
• Torque-Flex design accommodates variable-speed and high-torque drive applications
• 54.0-inch outside length corresponds to standard BX51 belt designation

Compatibility

Designed as a direct OEM-style replacement for BX51 belt applications using BX-section sheaves in residential and commercial HVAC blower drives, fan systems, and general industrial power transmission equipment.

Installation Notes

Belt replacement should be performed by a qualified HVAC technician or mechanical contractor with the drive system fully de-energized and locked out per OSHA lockout/tagout procedures. Never pry or force the belt onto sheaves; always release drive tension by adjusting the motor mount before installing or removing the belt. Inspect sheaves for wear, misalignment, and proper groove profile before installing a new belt. Tension the belt according to the equipment manufacturer's deflection specification to avoid premature wear or belt slip.