Coil Tension

  1. Tension roll is surface coated with Polyurethane which is softer than metal, but it is endurable to take friction and sharp burr on slit strip edge to guide slit strips running in steady way.
  2. Tension rolls is designed to produce tension by about 2% speed slower on tension rolls than recoiling speed. This approximately 2% speed differential can generate electricity feed-back to decrease the machine power consumption. The money saved years round can cover the expense for replacement of PU when the roll surface is critical damaged.

The main differences are listed in below table.

Item description

Tension Rolls

Belt Bridle

1.    Scratch on material

No

No

2.    Cost investment

Low

High

3.    Life time

Long

Short

4.    Maintenance expense

Low

High

5.    Time to adjust after replacement

Quick

Slow

6.    Operational electricity consumption

2% feed back

High

7.    Additional cooling device

No need

Yes