How to Tension a Belt?

Introduction

Achieving proper belt tension is a critical factor that significantly influences the longevity and efficiency of machinery. Insufficient tension can lead to slippage, resulting in accelerated wear of belts and sheaves, ultimately impacting productivity. On the other hand, excessive tension places undue stress on belts, bearings, and shafts. 

Understanding the Tensiometer

The Tensiometer is designed to measure belt tension by assessing the force required to deflect a specified span length by a given amount. Specifically, the single stem Tensiometer is equipped to measure force within the range of 0-35 lbs. (0-15.9 kg.) and belt tension from 0-560 lbs. (0–255 kg.) on belts up to 1 inch in width.

Procedures for Using the Tensiometer

1- Safety First

Before initiating any tensioning process, disconnect and lock out the power source. Check all safety procedures. Be sure to review and comply with all safety codes.

2- Measure the Span Length

Determine the span length of the drive and set the large "O" ring on the Tensiometer at 1/64˝ for each inch of belt span. For instance, if the span length is 16 inches, set the large "O" ring at 1/4˝; for a span length of 32 inches, set it at 1/2˝; or for a span length of 64 inches, set it at 1˝, and so forth.

 

 

3- Adjust the Small "O" Ring

Set the small "O" ring to zero and press down the Tensiometer at the center of the belt span:

• For a single belt drive, depress until the large "O" ring aligns with the bottom of a straight edge or string on the outer rims of the sheaves.

• For a multiple-belt drive, depress until the large "O" ring aligns with the top of the next belt. Take average readings for all belts in the drive, and for banded belts, multiply the deflection force by the number of ribs in the band.

 

 

4-Record the Reading

Upon removal of the Tensiometer, note the movement of the small "O" ring from zero to the pounds required to deflect the belt.

5-Check Against Deflection Force Table

Compare this reading against the V-Belt Tensioning table. 

By adhering to these Tensiometer procedures, industries can ensure precise belt tension, promoting optimal machinery performance and longevity.

HVH Industrial Solutions is an authorized distributor of Bando, Timken Belts, Bestorq, Optibelt,  and many other belt manufacturers. We work closely with their engineering team to provide superior customer service and engineering support. 

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