5L350 V-Belt – 5/8" x 35" Commercial Garage Door Operator Drive Belt

The 5L350 is a standard fractional-horsepower V-belt designed for compatible commercial garage door operators and other pulley-driven mechanical systems requiring a 5/8" wide belt with a 35" nominal outside length.

V-belts transfer power from the operator motor to the driven pulley through friction along the angled sides of the belt. Proper belt size, pulley alignment, and tension are important for smooth operation, efficient power transfer, and reduced wear on operator components.

Product Features

• Standard 5L-section V-belt

• 5/8" top width

• 35" nominal outside length

• Single-strand construction

• Designed for compatible commercial garage door operators

• Suitable for pulley-driven mechanical systems

• Replacement for worn, stretched, cracked, or slipping belts

• Suitable for compatible fractional-horsepower drive applications

Specifications

• Belt Number: 5L350

• Belt Section: 5L

• Top Width: 5/8"

• Nominal Outside Length: 35"

• Number of Strands: 1

• Belt Type: Fractional Horsepower V-Belt

• Application: Commercial Garage Door Operator & Mechanical Drive Systems

Common Applications

Suitable for compatible:

• Commercial garage door operators

• Industrial overhead door operators

• Jackshaft operator assemblies

• Trolley operator assemblies

• Motor-to-pulley drive systems

• Mechanical power-transmission equipment

Belt Size Identification

The 5L350 designation identifies the belt size:

• 5L = approximately 5/8" top width

• 350 = approximately 35" nominal outside length

If the existing belt is clearly marked 5L350, this is typically the correct replacement size.

Compatibility & Matching

Before ordering, verify:

• Existing belt number

• Belt width

• Belt length

• Pulley groove size

• Operator model

• Required belt section

Do not choose a replacement based only on approximate belt length.

A belt with the wrong width or cross-section may sit incorrectly in the pulley groove, causing slipping, excessive heat, premature wear, or reduced power transfer.

Signs a V-Belt May Need Replacement

Inspect the existing belt for:

• Cracking

• Fraying

• Glazing

• Excessive stretching

• Missing material

• Belt slipping

• Squealing during operation

• Excessive vibration

A worn belt can reduce operator performance and place additional stress on motors, pulleys, shafts, and bearings.

Installation Notes

When replacing a V-belt:

• Disconnect operator power

• Properly secure the garage door

• Inspect both pulleys for wear or damage

• Confirm proper pulley alignment

• Adjust belt tension according to the operator manufacturer's requirements

• Confirm proper belt tracking after installation

A belt that is too loose may slip and overheat. Excessive tension can place unnecessary load on motor shafts, bearings, and pulleys.

Package Contents

• 1 – 5L350 V-Belt, 5/8" x 35"

Pulleys, motors, shafts, bearings, operators, and other drive components are sold separately.

Important Note

Always match the replacement belt to the original belt number and equipment requirements before installation.

Disconnect electrical power and properly secure the door before servicing any commercial garage door operator or belt-drive assembly.