Winches are rotating spools driven by motors that tighten or loosen cables. There are manual, electric, and hydraulic winches. Manual winches are operated by hand, electric winches use electric motors typically for vehicle recovery, and hydraulic winches use pressurized fluid to generate force for pulling large heavy objects. Winches should be capable of pulling at least 1.5 times a vehicle's weight and operate in temperatures from -20°C to +50°C. They have advantages like speed and efficiency but also disadvantages such as higher costs, maintenance needs, and risk of overheating. Winches are used in applications like marine vessels, vehicle recovery, construction equipment, and drilling rigs.

1. WINCHES
Presented by :
A.Seshu Kumar

2. Main View
What is a winch?
Types of winches
Capability of a winch
Avantages & Disadvantages
Applications

3. What is a WINCH?
• A winch is a rotating spool, driven by a
motor, that can tighten or loosen a cable.
• Components of winch
DRUM
Spool
MOTOR

4. Types of Winches
Manual winch
 operates a rotary handle
manually to lift, carry, tow,
etc. an object
Electric winch
 For vehicle recovery
 Operated by electric
motors
Hydraulic winch
 used to pull large, heavy objects over
long distances
 They use pressurized fluid to generate
immense force and torque. This force is
then used to drag, lift or push objects

5. Capability of a winch
• should be able to pull at least 1.5 times the weight of your
vehicle.
• built for a working temperature range of between -20°C and +50°C.
• One of the fundamental characteristics of the winch is the change in
working radius that occurs as the winch drum fills and empties. Along
with this change in working radius, the available line pull and line
speed will also vary depending on the fullness of the drum.

6. • The selection of speed ranges is crucial to the maximum performance
of the winch and is governed by a balancing of line speed versus
pulling power.
• Factor of safety for winch is around 3.
• A sudden winch rope failure is quite possible, especially if the
winch line is either shock loaded, or in this case the rope may
have been overstressed by an undersized corner radius.

7. Advantages Disadvantages
Speed
Efficiency
Reduces tension force
by 50%
Higher cost of
installation
requirement to lift the
weight at higher
speeds.
Maintenance
Complexity
Over heating

8. Applications
• Marine & fishing boats
• Vehicle recovery
• Construction equipment
• Drilling equipment