OTC Tools 4748 Belt Tension Gauge for Secondary Drive Belts

The OTC Tools 4748 Belt Tension Gauge is a precision measurement tool designed to ensure accurate belt tension settings on secondary drive belts. This professional-grade gauge is essential for proper belt replacement, adjustment, and wheel service procedures where maintaining correct tension is critical for optimal performance.

Key Features:

• Easy-to-read graduated scale for precise tension measurements
• Specifically calibrated for secondary drive belts with a 10 lb. specification
• U-shaped belt cradle for secure, stable positioning at 90-degree angle
• Dual O-ring reference system for accurate deflection measurement
• Rubber bumper design for consistent upward force application
• Durable construction for professional shop use

How to Use:

Position the small O-ring over the 10 lb. mark on the gauge. Place the U-shaped belt cradle against the bottom of the belt at a 90-degree angle and align the large O-ring to a reference point on the belt—record this reading. Push upward on the rubber bumper until the small O-ring touches the bottom of the tool body, then re-align the large O-ring to the same reference point. The difference between the two readings indicates belt deflection, which should be compared to your vehicle's service manual specifications.

This gauge eliminates guesswork and ensures belts are neither over-tensioned (which can cause premature bearing wear) nor under-tensioned (which can lead to slippage and reduced performance). An essential tool for automotive technicians and serious DIY mechanics.