Pallet Truck

Powered

Walking

Mannual

Riding


Pallet

No Stacking
one

Click on the descriptions below to read about the functionalty factors of Equipment

General Description
  • Pallet Trucks are used for lifting & shifting of Palletized & non palletized loads,
  • A hydraulically operated lifting system is put along the towing end
  • The tip end of the fork contains wheels that are steered inside the pallet for lifting.
  • Rated capacity is the maximum load that the truck can lift at the specific load center
  • Load center is the distance from the front face of the fork to the center of gravity of the load
  • Pallet trucks only lift load to a small height, so that the pallets can be raised from the surface and carried to different place
  • The pallet trucks have a freedom of movement in two directions, namely
    1. Horizontal movement (driving wheel)
    2. Vertical movement of the Fork (sufficient enough to lift the load from ground and carried from one point to another on floor level
Types of Pallet trucks

Pallet trucks can be classified into three main types namely, 1) hydraulic pallet truck, 2) Scissor pallet truck, and 3) Battery operated pallet truck

Manual Pallet Truck (Pallet + Walking + No Stacking + Manual): Manual Lifting and/ or traveling

Power Pallet Truck (Pallet + Walking + No stacking + Electric Power): Electric powered Lifting and/ or traveling

Scissor Pallet Truck (Pallet + Walking + No stacking + Electric Power): Manual Lifting and or traveling. Scissor pallet truck can be raised to much height height than the other two type of pallet trucks.

Load Center

Load center is the distance between face of fork and center of gravity of load. Load center changes with change in the dimension of the load.

For Oversized load whose center of gravity is at a distance greater than the manufacturer’s rated load center, the rated capacity should be equal to the weight of load at that particular load center for safe operation.

Turning Radius
The turning space taken by truck to rotate by 90 degree without the load.
Aisle Width
Minimum Aisle width: The width of the road/ space between two adjacent shelves is called the aisle width (For safety reasons, the aisle width should be at least 150mm more on each side than the width of load or the truck, whichever is wider).
Minimum Aisle width = Clearance from wall (1) + Width of Truck/ load (2) + Clearance from wall (1)
90 degree stacking aisle width

The amount of space needed for a ninety degree turn of the truck for the purpose of stacking the load is the 90 degree Stacking Aisle Width.

90 degree Stacking Aisle Width = Clearance from Wall/ shelf (1) + Turning Radius (2) + Truck length inclusive the back of fork (3) + Length of load/ fork (4) – Truck Length (5)

Gradability

It is the ability of the truck to travel on slopes/ uphill roads/ inclined surface without a considerable loss of forward speed or drain on the source of the energy. The angle of incline is stated as percentage and is obtained by dividing the increase in height of slope per meter of slope/ road length

Electric motor: 10% (General)

Gradability = Height of slope/ Unit length of slope X 100%

Electric truck Battery selection

The battery selection is dependent upon voltage and Ampere – hour rating. The voltage is related to the speed of the truck. The ampere – hour is related to the number of continuous working hours of the truck i.e. higher the ampere – hour of battery, longer will be the running time. Batteries can be used until 80 percent discharged.

One Ampere - hour is equal to flow of one ampere current for one hour. Thus, a 750 Ahr (ampere - hour) will get discharged at 750 amperes in one hour or 375 amperes in two hours and so forth.

For a standard industrial battery, the running time can be calculated as,

(Ampere - hour rating) X Factor = Running Time
Average motor current                           

For an 8 – hour industrial battery, the factor is 0.95 & for a 6 - hour Industrial battery, the factor is 0.98

*Note: The equation is an approximation for calculative purpose only. The actual running time will depend on many other factors like size of the motor, terrain, driving condition and other specific truck application

Battery charger selection

Manufacturers offer two types of chargers namely single rate and double rate. As the name suggest, double rate battery chargers charge faster than the single rate battery charger. Double rate battery chargers are a little more expensive than single rate battery chargers

For a standard industrial battery charger, the running time can be calculated as,

(6 - 8-hour discharge rate) X Ampere - hour rating = Average charging time
Charger current rating X 0.66                                          

*Note: The equation is an approximation for calculative purpose only. Please refer to the battery charger specification for details.

Parts of pallet truck

Forks are the load engagement device i.e. they are the device that come in physical contact of the load to be lifted. Forks are attached to the carriage.

Forks standard dimension is ((1070 – 1200) X (100 – 150)) mm (Length X Width). They are around 40mm thick at the heels or the tip ends.

While a normal fork comes in pair, in case of pallet trucks, the forks are connected at one end. This is the A Frame. A Frame also serves as a cover for the hydraulic pump assembly.

In case of battery operated pallet truck, the A Frame is replaced by a compartment that contains the battery and the electro – hydraulic assembly.

The steer wheel is located at the back of A Frame in hydraulic lifts and below the battery compartment in battery operated pallet trucks.

Steer wheels come in either polyurethane or nylon wheels. While the polyurethane wheels are more rigid, for epoxy floors nylon wheels are more preferred.

Load rollers are positioned at the open end of the forks. These are the Guide rollers that go below pallets and loads and lift the load from the ground.

Load rollers come in either polyurethane or nylon wheels. While the polyurethane wheels are more rigid, for epoxy floors nylon wheels are more preferred.

Hydraulic hand Pallet truck/ Scissor pallet truck: The hydraulic system consists of a single acting cylinder, a hydraulic storage unit and a plunger pump. The lifting and lowering is managed by putting the lever to active position and moving the towing handle up and down Battery operated Pallet truck: The lifting / lowering is managed via an electro – hydraulic system Electric Motor: Electric motors have two variants namely AC motors and DC motors. • Electric trucks are suitable only for Inside operation • Electric trucks require battery charging station

Load rollers come in either polyurethane or nylon wheels. While the polyurethane wheels are more rigid, for epoxy floors nylon wheels are more preferred.

The towing handle has two positions namely 1) traveling position (when the handle is at an angle to the floor surface) and 2) breaking position (when the handle is either vertical or horizontal to the floor surface)

The horizontal traction control is managed using the trigger which is placed at the end of the towing handle.

The lifting/ lowering is managed via this spring loaded control lever that has three operating positions namely 1) lift, 2) lower, and 3) neutral position.