OTC Belt Tension Gauge OTC 6673 — Universal dual-scale (ft·lb/N·m) for automotive & motorcycle use

The OTC 6673 Universal Belt Tension Gauge is a precision hand tool that measures drive belt tension quickly and accurately using a full-color dual scale in foot-pounds and newton-meters.

The OTC 6673 was built to help technicians and DIY mechanics confirm belt tension to manufacturer specifications so belts and accessory components run reliably and last longer. Its rugged construction and clear dual-scale readout remove guesswork from belt adjustment across automotive, motorcycle, and industrial applications. By matching the required tension, you avoid premature belt wear, noisy operation, and excess load on bearings and pulleys.

How does this gauge help me set belt tension correctly?

The OTC 6673 converts the deflection or force you apply into an easy-to-read tension value, eliminating manual conversions or rough estimates. The dual-scale display shows both foot-pounds and newton-meters so you can follow specifications from North American and European manufacturers without math.

• Dual-color scale: 30–180 ft·lb and 130–800 N·m for direct reading.
• Immediate numeric feedback reduces subjective feel-based adjustments.
• Works across many belt types — automotive serpentine, V-belts, and motorcycle belts.

What makes the OTC 6673 accurate and durable?

OTC uses premium materials and precision castings to maintain calibration and reliability over repeated shop use. Careful assembly and quality control minimize drift so the tool stays accurate through years of service, even in harsh garage environments.

• Precision cast components for stable mechanical calibration.
• Robust housing and finishes resist shop wear and contaminants.
• Simple mechanical design lowers the chance of electronic failure.

Which vehicles and belts can I test with this gauge?

The 6673 is versatile enough for automotive, motorcycle, and light industrial belt systems, covering most accessory and power-transmission belts technicians encounter. Its broad scale range accommodates small motorcycle belts up to larger automotive accessory belts.

• Automotive serpentine and V-belt systems for alternators, AC, and power steering.
• Motorcycle drive belts and secondary drive systems.
• Light industrial belt drives where manual tension checks are required.

How do I use the gauge safely and effectively?

Position the gauge according to the included instructions and apply steady force at the recommended point on the belt. Read the indicated value on the dual scale and compare it to the vehicle maker’s specification before making adjustments.

• Follow manufacturer deflection points and force application method.
• Make small tension adjustments and re-check until within spec.
• Inspect pulleys and bearings for wear while performing tension checks.

Who is this for: The OTC 6673 Universal Belt Tension Gauge is designed for professional technicians, independent shop owners, and knowledgeable DIYers who demand repeatable, specification-level belt tension readings. If you service a range of vehicles or belt-driven equipment and need a durable, straightforward tool to confirm proper tension without conversions, this gauge delivers reliable performance and long-term value.

Features:

• Accurate belt tension checks to manufacturer ranges for extended belt and component life.
• Full-color dual scale reads 30–180 foot-pounds and 130–800 newton-meters for international specs.
• Premium materials and precision castings for lasting accuracy and durability.
• Suitable for automotive, motorcycle, and light industrial belt systems.