Gates AX39 Accessory Drive Belt - Compressor and Alternator

Gates AX39 Accessory Drive Belt

The Gates AX39 is a classical section molded notch V-belt built for heavy-duty accessory drives that use small diameter pulleys and back idlers. Its EPDM belt material, polyester cord, and notched construction help it handle heat, resist cracking, and maintain dependable drive performance.

For buyers searching for a Gates AX39 V-belt, AX39 accessory drive belt, or a classical section molded notch V-belt for automotive and light-duty industrial service, this part is built around the dimensions and construction details that matter most.

Key Features

• Part number: AX39
• Brand line: Classical Section Molded Notch V-Belt
• Cross section designation: AX
• Top width: 0.5 in. / 13 mm
• Outside circumference: 41 in. / 1041 mm
• Notched construction for improved flexibility
• EPDM belt material for heat and crack resistance
• Polyester cord material for stable reinforcement
• Single-strand design

Product Details

Gates Tri-Power belts are engineered for demanding accessory drive systems that need a classical cross-section profile with added flexibility. The molded notch design helps the belt track around smaller pulleys and back idlers, while the EPDM compound is selected to better withstand elevated temperatures and reduce cracking over time. If you are replacing a worn AX39 belt on a vehicle or equipment application, this belt provides the size and construction needed for consistent drive operation.

This part cross-references Dayco AX39 for the same application. Search terms such as Gates AX39, AX39 V-belt, and AX section accessory drive belt are commonly used by shoppers looking for this exact profile.

What It Helps Address

• Squealing or slipping accessory drive belts
• Cracked, glazed, or hardened V-belts
• Loss of belt grip on small pulley systems
• Wear from back idlers and high-heat operation
• Drive instability caused by an incorrect belt profile

Installation Notes

Verify the AX section profile, top width, and outside circumference before installation. Inspect pulleys and idlers for wear, contamination, or misalignment, since those conditions can shorten belt life. Confirm the replacement matches the original belt routing and tension requirements for the vehicle or equipment application.

For fitment-based searches, this Gates AX39 belt is commonly referenced for accessory drive belt replacement needs on vehicles and equipment using an AX classical section profile. If you are sourcing a Gates AX39 for a specific make and model, confirm the belt dimensions against the original part before installation.

Quality Assurance

Gates is known for belt engineering focused on durability, dimensional accuracy, and consistent performance in accessory drive systems. The AX39 uses EPDM construction, molded notches, and polyester reinforcement to support reliable service in demanding operating conditions.