COMEUP Utility Duty Winch (Ver:00) - Manual (Page 7)

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For example, if a vehicle weighing 1,200 kg is winched up an incline by 100% on the marsh
road, the above formula would be used as follows:
Where Wt: 1,200 kg, S: 0.52 G: 0.71
RPF = (Wt X S) + (Wt X G)
= (1,200 kg X 0.52) + (1,200 kg X 0.71)
= 624 kg + 852 kg
= 1,476 kg of effect required to recover the vehicle.
Winching V.S. Hoisting. A pulling winch should not be used for lifting.
Please refer to our website to view our full range of lifting winches
A gradient of 10% is a rise
of one meter in ten meters
(High / Distance)
Securing Anchor Point
When choosing an anchor point, select a safe and firm point such as a tree, stump or rocks.
If using a winch to retrieve another vehicle, the rescue vehicle is considered the anchor point
and should be made secure.
The anchor point must be strong enough to hold the gross weight of the vehicle and be
positioned to keep the fleet angle between the centre of the anchor point and the wire rope
maintained less than 15°. Always use a tree trunk protector strap to prevent ring barking the
tree and damaged to the wire/synthetic rope.
III . Accessories
Roller Fairlead
The use of 4 ways roller fairlead can eliminate the contacting
friction because the fairlead rollers contact with the wire rope. But the
fairlead does not insure the wire rope will wind onto the drum in an
orderly manner. The proper fleet angle within 15° must be maintained
for the wire rope to wind onto the drum in an orderly manner.
Recovery Damper
A recovery damper is a safety device designed to help eliminated
the possibility of injury or property damage in the event of a wire/synthetic
rope failure. Place in the middle third of a live rope.
The damper can help absorb the energy in the rope and reduce
the likelihood of injury or damage.