Spring Pressure Tester

Compact Size For Fast, Easy Readings
Efficient, durable and small enough to fit in your hand, Helwig's Electronic Digital Scale is the convenient way to measure brush holder spring force. Simply attach the interchangeable strap or roller to the spring assembly and pull the scale taut by the comfort-grip handle. The measured force is clearly displayed in easy-to-read,'h-in. LCD numerals.

Precise Spring Force Measurements
The battery-operated Digital Scale accurately reads force measurements of both spiral torsion springs and constant force springs up to 70 Ibs. (+ or - 2 oz.). Convenient automatic zeroing ensures measurement of only the spring force, not the weight of the strap or roller,so that every reading is precise.

Reduce Downtime Due To Inadequate Spring Force
Fatigue can cause any brush holder spring to wear out and lose its rated force, resulting in unsatisfactory brush performance. The Helwig Electronic Digital Scale helps detect improper spring forces before excessive brush or commutator wear causes costly downtime.

A Simple Way To Determine Spring Force
Remove brush before measuring spring force. Turn on (zero) digital scale. Insert roller assembly inside constant force spring or slide leather loop around torsion spring fingec Pull spring back in direction of brush travel until it reaches approximate new brush Iocation, then let it return about 1/16 to1/8 inch. Observe measured spring force. Calculate spring pressure by using formula listed below. Refer to Helwig's Recommended Range of Spring Pressures Chart to determine if the correct spring force is being applied to the application.