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Frequently asked questions – FAQ:
How to calculate a line pull when the load is going uphill?
All winches are rated on a DEAD WEIGHT line pull and can pull in excess of the rating on rolling loads and wheels.
To calculate your line pull
Line Pull = W*(Gr+CF)
GR= Grade Resistance
CF= Coefficient of friction
For example, if you want to pull a steel bin on wheels up a 30% cement grade with a total weight of 5 tons, What line pull do I need?
Line pull = 5 tons * (.288+.2-.5) = 2.44 tons – 3.94 tons
Batteries (12V-24V-48V) normally used for DC-winches :
- The most common in today’s market is Deep Cycle (Starting Battery) with a minimum of 650CCA. This is fine for a DC winch, which can be connected directly to the car battery or an extra 650CCA battery.
Connect directly to the battery using good cables, as the power is strong.
How to avoid wire jam:
Get the right sheave position:
The right fleet angle is important if you wish to avoid wire jams.
The winch must be placed so the wire is getting as close as possible to 90° as possible.
If this is not considered, you risk the wire is placed on one side of the drum, which will damage the winch or the wire.
In order to get a correct winding in angel, a sheave must be used.
The sheave must optimally be placed at a distance of 19x the with of the drum on the winch.
Pressure roller, which is pressing down the wire on the drum.
If necessary to”guide” the placement of the wire on the drum, the most common is to use a “pressure roller”. (Many of our standard models have this as a integrated feature)
This system is working fine for wire lengths up to 150m. If combined with a grooved drum it’s even better.
If the wire is longer we recommend using a Spooling gear system
If the wire is short we recommend a grooved drum to place all wire in the first layer on the drum.
Contact Winch Supply for further information.
The maximum pulling/lifting force of a winch:
All winch capacities are based on the pulling/lifting force in the first layer of the drum
The biggest force of the winch is the pulling force on the first layer of the drum.
As more and more rope is added to the drum the drawing/pulling speed will increase but the pulling force decline. (Please study the technical information for your specific winch choice)
If a pulley block (with one wheel) is used the pulling capacity will double, but the speed will be 50% slower.
When using a pulley for heavy duties the amp going through the motor will be reduced, meaning the motor will be less warm.
The winch must have a capacity of 1.5 times the weight to be pulled/lifted. So a winch that must pull 2 tons must have a capacity of 3,5t.
Special equipment (AC, hydraulic and pneumatic winches):
“Spindle limit switch“: (230v-380v designed winches)
A mechanical device stopping winding “in-out”.
The spooling gear makes sure the wire is placed correctly on the drum.
A grooved drum makes sure the wire is placed correctly on the first layer.
Slack wire switch To make sure the wire is always under pressure.
Pressure roller Pressing the wire onto the drum. Also if winching is stopped
Band brake Used when the brake needs to be controlled
IP: What does it mean?
The IP shows how the product is protected against water and dust etc. Consists of 2 digit numbers
IP 66 means dust tight and protected against powerful jetting water
Custom made/custom designed/tailor-made winches:
A custom-made solution is a solution designed according to your specific needs and requirements.
Please send us your requirements.