Home / Equipment Buying Glossary

First, the words

Terminology matters because it decides whether you ask the right question. Each entry below adds why the term changes a purchasing decision.

Forklifts & material handling

Forklifts & material handling

Load centre

The horizontal distance from the fork face to the centre of gravity of the load. Rated capacity is always quoted at a specific load centre, most commonly 500 mm.

Why it matters Load a pallet whose centre of gravity sits further out and the safe capacity falls, even though the load weight has not changed. It is why a rated tonnage is not a universal figure.

Rated capacity

The maximum load a truck can lift under defined conditions — at a stated load centre, lift height and mast configuration. It is not a single universal number.

Why it matters Capacity falls as lift height rises. A truck rated at 2 tonnes at ground level may lift considerably less at six metres, which is what the load chart shows.

Load chart

A diagram showing the maximum safe load at each lift height and load centre for a given truck and mast combination. It is specific to the machine, not to the capacity class.

Why it matters It is the document that should decide a purchase. Comparing two quotes without comparing load charts at your working height compares two different capabilities.

Lift height

The height to which the forks can be raised. Often quoted as maximum, but the useful figure is the height at which you still need full capacity.

Why it matters Specifying on maximum lift height alone produces a truck that reaches the top rack but cannot lift the load there. The working height is what matters.

Free lift

A mast arrangement where the forks rise within the mast before the mast itself extends, so overall truck height stays constant through the first range of travel.

Why it matters Required for working inside a container, under a mezzanine, or through a low door frame. Without it, a truck that fits when empty may not fit once the forks are raised.

Mast stages (duplex / triplex)

The number of mast sections that extend. A two-stage mast is standard; a three-stage mast reaches higher within the same collapsed height and is usually required for free lift.

Why it matters It is the trade-off between lift height, collapsed height and cost. Choosing the wrong stage count is a common reason a machine cannot enter a building it was bought for.

Duty cycle

How hard the truck works: shifts per day, hours per shift, loads per hour, and how much of the time it is actually lifting versus travelling.

Why it matters It decides the battery strategy more than any other factor. A light single shift and a heavy two-shift operation need different answers even for the same machine.

Opportunity charging

Topping up the battery during breaks or idle periods instead of running a full charge cycle. Practical with lithium, generally not with lead-acid.

Why it matters It is what removes the spare battery set from multi-shift operation, which is the main practical argument for lithium.

Counterbalance truck

A truck whose weight at the rear counterbalances the load on the forks. The most versatile type, able to work indoors, outdoors, on ramps and inside trailers.

Why it matters It needs a wider aisle than a reach truck of the same capacity because the whole truck pivots, which is the trade-off against its versatility.

Reach truck

A truck whose mast moves forward to reach the racking rather than the whole truck turning. Designed for narrow aisles and high racking.

Why it matters It buys storage density, because a narrower aisle means more racking. It is not intended for outdoor or trailer work, which is where the counterbalance wins.

Stacker

A pedestrian or rider machine that lifts pallets to a height but travels short distances. Simpler and cheaper than a counterbalance truck.

Why it matters For short transfer and low-level stacking it does the job at a fraction of the cost. The mistake is using it where longer travel is needed.

Pallet truck (pallet jack)

A machine for moving pallets horizontally, typically with limited lift height. Electric versions suit longer distances and heavier loads.

Why it matters It is usually the cheapest way to move pallets and the first machine most operations buy. If you also need stacking, a stacker covers both.

Solid tyres

Non-pneumatic tyres that do not puncture and last well on smooth indoor floors. The standard choice for warehouse machines.

Why it matters They are the wrong choice on gravel or soil, where traction and ride quality both collapse. Ground surface decides the tyre, before capacity does.

Pneumatic tyres

Air-filled tyres that absorb surface irregularities and provide traction on uneven or soft ground. Common on rough-terrain and outdoor machines.

Why it matters Required for gravel, soil and mixed outdoor surfaces. Choosing solid tyres for an outdoor yard is a specification error that shows up immediately.

Gradeability

The gradient a truck can climb, usually stated as a percentage. It is specified at a particular load and condition, not universally.

Why it matters Rated gradeability rarely equals performance at full load on a wet ramp. If ramps are part of the duty, the figure has to be checked at the working load.

Side-shift

An attachment that moves the forks laterally without moving the truck, used to align with pallet openings. The most commonly fitted attachment.

Why it matters It saves repositioning time on every pallet, which is why it is usually the first attachment specified. It has to match the carriage class.

Carriage class

The standardised size and load rating of the fork carriage, which determines which attachments can be mounted and how they connect.

Why it matters An attachment bought locally may not fit a machine specified without checking the carriage class. It is confirmed, not assumed.

Container loading quantity

How many units fit in a given container, which depends on machine size, whether the mast and tyres are removed, and how units are braced.

Why it matters It is calculated from the loading plan, not estimated. The CBM and weight per unit from that plan is what a freight quote is built on.

Sealing & packaging

Sealing & packaging

Sealing width

The width of the heat-sealed band produced by a band sealer, typically 6–15 mm depending on the machine and jaw.

Why it matters It has to suit the pack and the product weight. A wider seal is stronger, but it also needs more heat and dwell, which affects line speed.

Dwell time

How long the heated jaw or band stays in contact with the film. Along with temperature and pressure, it is one of the three variables that form a seal.

Why it matters A film that will not seal on one machine may seal on another simply because the dwell time can be set differently. It is why film and machine are confirmed together.

Chamber vacuum

A vacuum method where the entire pack is placed inside a sealed chamber that is then evacuated. Liquid released under vacuum stays inside the pack.

Why it matters It is the only reliable route for wet, moist or powdery products. An external machine would draw liquid towards the pump.

External (suction) vacuum

A vacuum method where air is drawn through the open bag mouth, with no chamber. Simpler and faster per unit on dry goods.

Why it matters It suits dry, free-flowing products only. Buying it for a wet product is one of the most common and most expensive packaging mistakes.

Gas flushing (MAP)

Replacing air in the pack with a chosen gas mixture before sealing, to slow spoilage or protect product colour and structure.

Why it matters It is a separate configuration, not an add-on. It has to be specified at the start because it changes the machine, not just the settings.

Nitrogen flushing

A specific form of gas flushing using nitrogen, commonly to displace oxygen and extend shelf life or protect product structure.

Why it matters Like gas flushing generally, it has to be part of the original specification. Retrofitting it is a machine change, not a settings change.

Can seam (double seam)

The interlocked joint formed where the can end is rolled onto the can body by two operations, creating a hermetic seal.

Why it matters It is measured, not eyeballed. Seam thickness and body hook dimensions are checked with a gauge against a specification, because a bad seam leaks.

Seam thickness

One of the key measurements of a can seam, taken with a seam gauge and compared against the specification for that can size.

Why it matters It is the check that catches a badly set roller before the product is packed. Ask whether the gauge is supplied with the machine.

First operation roll

The seaming roller that performs the initial curl, forming the first part of the double seam before the second operation tightens it.

Why it matters It is a wear part that directly determines seam quality, so it belongs in the spare-parts plan alongside the second operation roll.

Throughput

Output per unit time — packs per minute for a sealer, cans per hour for a can seamer. Always tied to a pack size and a feeding assumption.

Why it matters A single throughput figure without its assumptions is misleading. What matters is the output at your actual pack size and feeding method.

VFFS (vertical form fill seal)

A machine that forms a bag from a roll of film, fills it and seals it vertically in one continuous cycle.

Why it matters It suits high-volume single-format production. The film specification and the format decide whether it is viable, not the machine alone.

Trade & documentation

Trade & documentation

Incoterms

Standard trade terms defining where risk and cost transfer between seller and buyer — EXW, FOB, CIF and others.

Why it matters Two quotes for the same machine are not comparable if one is EXW and the other includes delivery to the port. The term is part of the price.

FOB (Free On Board)

The seller delivers the goods on board the vessel at the named port; risk transfers at that point. The buyer arranges and pays the main freight.

Why it matters It is the common basis for equipment exports because it separates the machine price from the freight, which the buyer’s forwarder prices separately.

HS code

The international classification code for a traded product, which determines the duty rate and any applicable trade measures in the destination country.

Why it matters It has to be confirmed with a customs broker for your specific configuration. We do not publish duty rates because they follow the code, the origin and current measures.

Certificate of origin

A document certifying where goods were produced, used for customs clearance and to claim preferential tariff treatment under a trade agreement.

Why it matters It can change the duty payable, and some markets require it to be legalised before shipment. Ask your broker whether it applies to your consignment.

Declaration of conformity

A document in which the manufacturer declares that a product meets the applicable directives and standards. For most machinery it is a self-declaration.

Why it matters This is what you check, not the CE mark itself. It should name the machine and cite specific directives and standards, otherwise it is not usable.

Technical file

The documentation set behind a conformity declaration — drawings, calculations, test results and risk assessment — which an authority can request.

Why it matters If it does not exist, the declaration behind it is unsupported. Asking whether it exists is a quick way to test whether a compliance claim is real.

Loading plan

A document showing how units are positioned, braced and blocked inside the container, with the CBM and weight per unit.

Why it matters It is the basis of a freight quote and of the container count. Quoting freight before it exists is how freight estimates turn out to be wrong.

Wear parts

Components that are expected to be replaced during normal service — chains, rollers, seals, brake parts, tyres, seal bars, belts.

Why it matters These are what stop a machine, not the drive system. The list should come from the supplier at quotation stage so the first set can ship with the unit.

Knocked down (KD)

Shipping a machine partially disassembled — typically with the mast removed — to reduce the volume occupied in a container.

Why it matters It reduces freight volume but requires reassembly capability at the destination. A machine that arrives in pieces with nobody able to rebuild it is not a saving.

A term you are unsure about?

Send it over and we will explain what it means for your selection.