engineering

Pallet jack

Pallet jack is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Pallet jack rather than just read about it. In short: A pallet jack, also known as a pallet truck or pallet pump, is a tool used to lift and move pallets. Pallet jacks are the most basic form of a forklift and are intended to move palletized loads within warehouses, distribution centers, retail stores, and construction sites.

Key takeaways

Pallet jack belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Pallet jack to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Pallet jack from memory before moving on to harder problems.

Reference excerpt

A pallet jack, also known as a pallet truck or pallet pump, is a tool used to lift and move pallets. Pallet jacks are the most basic form of a forklift and are intended to move palletized loads within warehouses, distribution centers, retail stores, and construction sites.

Operational principle The jack is steered by a tiller-like lever called a 'tow bar' that also acts on the pump piston for raising the forks. A small lever on the tow bar's steering handle releases the hydraulic fluid, causing the forks to lower. The steering wheels are located directly below the tow bar and support the jacking mechanism. The front wheels inside the end of the forks are mounted on push rods attached to linkages that go to levers attached to the jack cylinder. As the hydraulic jack at the 'tiller' end is raised, the links force the wheels down, raising the forks vertically above the front wheels, raising the load upward until it clears the floor. The pallet is only lifted enough to clear the floor for subsequent travel. Oftentimes, pallet jacks are used to move and organize pallets inside a trailer, especially when there is no forklift truck access or availability.

History

Manual pallet jacks have existed since at least 1918, following the introduction of pallets. Early iterations used mechanical linkages and other rudimentary systems to lift the forks, whereas more modern pallet jacks use a hand-pumped hydraulic jack or electricity.

Types

Manual pallet jack A manual pallet jack is a hand-powered jack most commonly seen in retail and personal warehousing operations. They are used predominantly for lifting, lowering and steering pallets from one place to another.

Powered pallet jack

Powered pallet jacks, also known as electric pallet trucks, walkies, single or double pallet jacks, or power jack, are motorized to allow lifting and moving of heavier and stacked pallets. Some contain a platform for the user to stand while moving pallets. The powered pallet jack is generally moved by a throttle on the handle to move forward or in reverse and steered by swinging the handle in the intended direction. Some contain a type of dead man's switch rather than a brake to stop the machine should the user need to stop quickly or leave the machine while it is in use. Others use a system known as "plugging" wherein the driver turns the throttle from forward to reverse (or vice versa) to slow and stop the machine, as the dead man's switch is used in emergencies only.

Rough terrain pallet jack Rough terrain pallet jacks are designed specifically for use on uneven ground. They are made using heavy-duty frames and robust pneumatic tyres so that they can be manoeuvred over rough surfaces with ease. Many manufacturers opt for watertight wheel bearings, a hydraulic elevator or a built-in pump to ensure their rough terrain pallet jacks are easy and comfortable to use, even in the harshest conditions.

Operational limitations Reversible pallets cannot be used. Double-faced non-reversible pallets cannot have deck-boards where the front wheels extend to the floor. Enables only two-way entry into a four-way notched-stringer pallet, because the forks cannot be inserted into the notches. Power jacks have difficulty in confined spaces (coolers) and narrow openings.

Operational risks Pallet jacks are classed as material-handling equipment (MHE). Under most health and safety law, training is required in their use (particularly for powered pallet jacks) and, as the loads carried are heavy, there is a substantial risk of accidents resulting in injuries.

Typical dimensions Industry seems to have 'standardized' pallet jacks in several ways.

Width of each of two forks: 180 mm (7 in) Fork width, i.e. The dimension between the outer edges of the forks: Available as 510 and 690 mm (20+1⁄4 and 27 in) Fork length: Available as 910, 1,070 and 1,220 mm (36, 42 and 48 in) Lowered height: 74 mm (2.9 in) Raised height: At least 190 mm (7.5 in), but some will raise higher In Eurasia the overall dimensions are similar, as modern container palletization has forced standardization in the dimensional domain globally.

See also EUR-pallet Manual handling of loads Unit load

References

External links

A pallet jack or a pallet truck? OSHA hazards of working with pallet jacks

Illustrations

Worked examples

Example 1 — a first encounter with Pallet jack

Start with the simplest possible case. Write down what Pallet jack claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Pallet jack before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Pallet jack ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Pallet jack

In research: Pallet jack appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Pallet jack in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Pallet jack is common in secondary-school and first-year university syllabi. It links to neighbouring topics Freight transport, Lifting equipment, Material-handling equipment, so understanding it makes those chapters shorter.
In everyday life: Look for Pallet jack outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

Ask Teacher Smith questions about this articleOpens your AI tutor with a question about “Pallet jack” →

Affiliate

Preply — study more efficiently by working with a personal tutor. 50% off.

How to study Pallet jack in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Pallet jack means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Pallet jack out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Pallet jack in simple terms?

Why does Pallet jack matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Pallet jack?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Pallet jack.