Vacuum lifter glossary

Here you will find the most important technical terms relating to vacuum lifters, batteries, seals and tile laying.

Air pressure

The pressure of the surrounding air, which at sea level is around 1,013 hectopascals or 101 kPa. It is the actual source of force for every vacuum lifter: the pump removes air from under the suction pad, and the outside air pressure presses the pad against the workpiece. This sets a physical limit: no vacuum lifter can use more than the ambient pressure as negative pressure.

Automatic re-pump

A feature of electric vacuum lifters: a pressure sensor monitors the negative pressure, and if it falls below a threshold, the pump starts automatically and restores the vacuum. This increases safety on porous surfaces and over longer holding times. In the database, 28% of cordless vacuum lifters have this feature. The With automatic re-pump category shows all models.

Battery level indicator

An indicator that shows the battery's state of charge, as a percentage on the display or via several LEDs. On vacuum lifters it is relevant to safety, because a pump with a flat battery can no longer compensate for vacuum losses. So do not start a heavy lift with an almost empty battery, and recharge the device in good time. Many digital displays show battery level and negative pressure at the same time.

Battery voltage

The electrical voltage of a battery in volts. Built-in batteries in vacuum lifters usually work with one or two lithium-ion cells, while removable batteries from power tool systems often run at 18 or 20 volts. Voltage matters when interpreting capacity figures: only voltage times capacity gives the stored energy in watt-hours. A removable battery for a particular tool system must also match the voltage and the connection of the vacuum lifter.

Built-in battery

A battery that sits permanently in the handle of the vacuum lifter and is charged directly on the device, via USB-C or a dedicated power adapter. Such models are compact and often inexpensive, but are out of action while charging. In the database, 31% of cordless vacuum lifters have a built-in battery. The trade-off against a removable battery is covered in Removable battery vs. USB-C.

Buttering-floating

A combined method for laying tiles: the tile adhesive is applied both to the substrate (floating) and to the back of the tile (buttering). This creates a full-coverage adhesive bed with minimal voids. For large-format tiles and outdoor coverings, the method is standard. Vacuum lifters make it easier to place the coated tile precisely, and devices with a vibration function help with bedding it in afterwards.

Check valve

A valve that lets air flow in one direction only: out of the space under the suction pad, but not back in. It ensures that the vacuum is maintained when the pump stops or the pump plunger springs back. A dirty or worn check valve leads to a gradual loss of vacuum, even if the seal is fine.

Cordless vacuum lifter

A vacuum lifter with a built-in electric pump that creates the vacuum at the push of a button and tops it up as needed. Power comes from a built-in battery or a removable battery. Cordless vacuum lifters are far more common than manual models: 482 of the 519 devices in the database are electric. Typical features are a pressure sensor, a display for negative pressure and battery level and, on many models, automatic re-pump. The Cordless vacuum lifters category provides an overview.

Digital display

A display that shows the negative pressure as a number, usually in kilopascals or as a percentage, often together with the battery level. It is the most common type of display: 65% of all vacuum lifters in the database have one. Compared with a simple LED indicator, it lets you read more precisely how much reserve is left. Digital display vs. LED offers a comparison.

Foam seal

A seal made of soft, closed-cell foam that adapts to grooves, textures and slight unevenness. It holds on slip-resistant tiles, brushed stone and textured slabs where rubber fails. On the other hand, it wears faster and picks up dirt. In the database, 12% of vacuum lifters have a foam seal. The comparison is shown in Rubber vs. foam.

Gripster

A term widely used in the trades and in retail for vacuum lifters, especially for compact electric models with a battery and vacuum display. It refers to the same tool: a handle with a suction pad that lets you grip tiles, glass and slabs securely. Where the term comes from and how it is used is explained in the guide Gripster: what is behind the term?.

Hand pump

The pump plunger on manual vacuum lifters, used to create the vacuum by pressing it several times. On many models, a colored ring on the plunger shows when the negative pressure is dropping; you then need to pump again. Manual vacuum lifters with a hand pump need no battery and are inexpensive: in the database, their typical price is €42. For a comparison, see Electric vs. manual.

Holding time

The time a vacuum lifter holds the vacuum without re-pumping. It depends on the seal, the check valve and the surface: on glass, an intact vacuum lifter holds for a long time, while on porous stone the negative pressure drops faster. A short holding time is a sign of a worn seal or a leaking valve. Automatic re-pump compensates for short holding times.

Identical models

Vacuum lifters count as identical when they are technically the same but sold under different brands, names and prices. Housing, suction pad, seal, display and battery match; only the logo, color or packaging differs. For buyers, this means the same hardware is often available at very different prices. The Identical models overview combines such devices into groups and shows their price ranges.

Inch

The unit in which the diameter of round suction pads is usually stated. One inch equals 25.4 mm. Common sizes are 6 inches (around 150 mm), 8 inches (around 200 mm) and 10 inches (around 250 mm). 8 inches is by far the most common: 119 of the 200 round vacuum lifters in the database have this size. 8 inch vs. 10 inch shows the size comparison.

IP rating

The code indicating how well an electrical device is protected against dust and water, for example IP54. The first digit stands for protection against foreign objects and dust, the second for protection against water. On job sites with tile dust, adhesive and splashing water, a stated IP rating is a plus. Even so, cordless vacuum lifters should not be left out in the rain or immersed in water.

Kilopascal (kPa)

The unit in which vacuum lifters usually state the negative pressure. Normal air pressure at sea level is around 101 kPa. If a vacuum lifter shows 70 kPa of negative pressure, the pressure under the suction pad is lower than outside by that amount. The higher the value, the more firmly the pad is pressed on. Some devices show the value with a minus sign or as a percentage.

Large-format tile

A tile with long edges, usually from 60 x 60 cm upward, and for slabs up to 120 x 240 cm and beyond. Large formats are heavy, sag when lifted from one side and require a full-coverage adhesive bed. For carrying them, two vacuum lifters or a panel carrier are recommended, and two people for very large slabs. For tips, see Laying large-format tiles with vacuum lifters.

Leakage

A loss of air under the suction pad that causes the negative pressure to drop. Causes include damaged or dirty sealing lips, porous or textured surfaces, edges and joints under the pad, or a leaking check valve. Automatic re-pump compensates for small leaks. If the negative pressure drops quickly, stop the lift and check the seal and the surface.

LED indicator

A simple status indicator with colored LEDs, such as green for sufficient vacuum and red for insufficient vacuum. It is quick to read but does not give exact values. In the database, 9% of vacuum lifters have an LED indicator; among devices with a vibration function, it is the most common type, at 58%. The comparison with the digital display is shown in Digital display vs. LED.

Lever vacuum lifter

A manual vacuum lifter in which a lever pulls up the rubber pad after it has been placed, creating the negative pressure. Lever vacuum lifters are simple and inexpensive, but have no display and no re-pumping. They are suitable for smooth surfaces such as glass and glazed tiles, and for short distances. Before lifting, check that it is firmly attached by pulling on it gently.

Load capacity

The maximum load a vacuum lifter can hold according to its data sheet. It applies under ideal conditions: a smooth, airtight surface, full negative pressure, and a pull perpendicular to the suction pad. When a slab is carried upright, however, the load acts parallel to the surface, and the vacuum lifter holds only through the friction of the seal, so considerably less. The typical value across all models in the database is 200 kg.

Load capacity per €100

A key figure for value for money: the rated load capacity divided by the price per unit, multiplied by 100. A vacuum lifter rated for 200 kg at €50 reaches 400 kg per €100. Across all models, the typical value is 333 kg. Features such as the battery, display or automatic re-pump are not factored in. The best values are shown in Most load capacity per euro.

mAh

Milliampere-hours, the unit for the charge a battery holds. The typical value across all cordless vacuum lifters in the database is 3,000 mAh. mAh figures are only comparable at the same voltage: an 18-volt battery with 2,000 mAh stores more energy than a 3.7-volt battery with 4,000 mAh. For a fair comparison, calculate in watt-hours. The largest batteries are shown in the ranking Largest batteries.

Multi-pad vacuum lifter

A vacuum lifter with several suction pads on a shared handle or frame. The load is spread across several points, which is an advantage with glass and slabs. In the database, multi-pad vacuum lifters are rare and work manually with a lever mechanism. Each pad needs full contact with the surface for the device to hold securely. For larger loads, there are frame systems that combine several vacuum lifters.

Narrow vacuum lifter

A vacuum lifter with a narrow, rectangular suction pad for strips, baseboards, steps and slabs with little contact area. In the database, 51 models are narrow or rectangular. At 100 kg, their typical rated load capacity is well below that of round and oval models, but 61% of them have a foam seal. They are specialist tools that complement a larger vacuum lifter.

Negative pressure

The difference between the outside air pressure and the lower pressure under the suction pad. The greater the negative pressure, the more firmly the vacuum lifter is pressed against the workpiece. It is usually given in kilopascals, on some devices in percent or bar. Negative pressure is the quantity that the display, pressure gauge and pressure sensor monitor, and it should be in the safe range before every lift.

Oval vacuum lifter

A vacuum lifter with an elongated, oval suction pad. The shape suits long, narrow formats such as wood-look tiles, steps or slab strips. At 51%, oval models are the most common design in the database, and all of them are electric. Their typical rated load capacity is 260 kg. Round vs. oval offers a comparison of the shapes.

Panel carrier

A carrying frame or rail to which several vacuum lifters are attached to move large slabs. The frame keeps thin large formats from bending or breaking while being carried and spreads the load across several points. Panel carriers are usually carried by two people. When a carrying system is worth it instead of individual vacuum lifters is explained in Vacuum lifter, panel carrier or carrying strap?.

Porcelain stoneware

A particularly dense ceramic material that is fired at very high temperatures and absorbs hardly any water. Porcelain stoneware is the most common material for floor tiles and large formats, including thin slabs just a few millimeters thick. It is a good surface for vacuum lifters as long as the tile is smooth or only lightly textured. Highly slip-resistant versions hold better with a foam seal.

Porosity

The proportion of open pores in a material. Porous surfaces such as raw concrete, sandstone, untreated wood or open-pored natural stone let air flow through the material under the suction pad. The negative pressure then drops continuously, even if the seal is intact. On such surfaces, automatic re-pump and a soft foam seal help; very porous materials are not suitable for vacuum lifters at all.

Pressure gauge (manometer)

A mechanical instrument that shows the negative pressure under the suction pad with a needle on a dial, often with colored zones for safe and unsafe vacuum. Pressure gauges are found mainly on manual vacuum lifters with a hand pump. They work without power and can be read at a glance. Before lifting, check that the needle is in the safe zone.

Pressure sensor

An electronic component in cordless vacuum lifters that continuously measures the negative pressure under the suction pad. Its readings feed the digital display, control the automatic re-pump and trigger warning signals when the negative pressure falls below a threshold. Without a pressure sensor, the only check left is a pressure gauge or a marking on the pump plunger, as is usual on manual vacuum lifters.

Price per unit

The price of a single vacuum lifter. For twin packs and sets, the pack price is divided by the number of vacuum lifters included and rounded. This allows single units and packs to be compared directly. All prices on this site are prices per unit in euros. Across all 519 listings, the typical price per unit is €68.

Release valve

The valve or button used to let air under the suction pad in a controlled way to release the vacuum lifter. On manual models it is often a small tab on the seal or a lever; on cordless vacuum lifters it is usually a button on the handle. Only release the vacuum lifter once the workpiece is resting securely, and never operate the valve while carrying.

Removable battery

A battery that can be taken out of the vacuum lifter without tools and charged separately. With a second battery, the device is ready to use without a charging break. Many removable batteries come from 18-volt power tool systems, so batteries you already own can be used. In the database, 40% of cordless vacuum lifters have a removable battery. The With removable battery category shows all models.

Round vacuum lifter

The classic design with a circular suction pad, usually 8 inches in diameter. In the database, 200 models are round, including almost all manual vacuum lifters. Round vacuum lifters are suitable for square tiles, glass and slabs with enough surface area. Their typical rated load capacity is 200 kg. Round vacuum lifters shows all the data on this design.

Rubber seal

The most widespread seal on vacuum lifters: a ring or frame of elastic rubber with a sealing lip all the way around. It is used by 86% of all models in the database. Rubber seals reliably on smooth, hard surfaces such as glass, glazed tiles, polished stone and metal, and it is durable. On textures, grooves and rough surfaces, however, the lip cannot form a tight seal.

Runtime

The time a cordless vacuum lifter works on one charge. It depends on the battery capacity, but also on how often the pump has to start. On airtight surfaces such as glass, the device rarely re-pumps; on porous stone or with a worn seal, it does so often. Manufacturer's ratings for runtime usually refer to the number of suction cycles or to hours in standby mode.

Safety factor

The ratio between the rated load capacity and the load you actually lift. For vacuum lifters, a factor of at least 2 is used: a model with a load capacity of 200 kg should not carry more than 100 kg in everyday use. With lateral loads, textured surfaces or cold, a larger reserve makes sense. How to do the math is shown in Estimating load capacity correctly.

Sealing lip

The flexible rim running around a rubber seal, which is pressed onto the surface when the lifter is applied and seals off the space under the suction pad airtight. Even small cracks, nicks or embedded grains of sand let air seep in. So check the sealing lip before every use, keep it clean, and store the vacuum lifter with its protective cap. More on this in the guide Caring for and replacing seals.

Slip resistance

The property of a floor tile that prevents slipping, specified in rating groups from R9 to R13. The higher the class, the rougher or more profiled the surface. This matters for vacuum lifters: on highly slip-resistant tiles, a rubber seal cannot form a tight seal, while a foam seal adapts better to the texture. Test the grip on a sample tile.

Suction cup

A simple rubber cup that sticks when pressed on. Suction cups without a pump or lever hold only light loads and lose their grip after a while. In everyday language, the term is also used for the suction pad of a vacuum lifter, for example with tile vibrators with a suction cup. Technically, a true vacuum lifter differs in its active vacuum generation and a check valve.

Suction pad

The part of the vacuum lifter that is placed on the workpiece, also called a suction plate. Its area, together with the negative pressure, determines the holding force: a round pad with a 200 mm diameter has an area of just over 300 cm² and, at 80 kPa of negative pressure, theoretically holds around 250 kg perpendicular to the surface. The pad must sit fully on flat material.

Tile vibrator

A tool that vibrates tiles into the adhesive bed. Many tile vibrators are combined with a suction pad and double as a vacuum lifter, often with an oval pad and a removable battery from a power tool system. Vibrating and lifting in one device saves steps, especially with large formats. The stated load capacity of such combination devices is often high, but what still matters is monitoring the vacuum.

Twin pack

An offer with two or more identical vacuum lifters. Twin packs are practical for large slabs that are held at two points and carried by two people. On this site, the pack price is divided by the number of devices so that single units and packs can be compared fairly. Around 10% of the offers in the database are twin packs or sets.

Typical value

On this site, the term for the median: the value in the middle when all figures in a group are sorted by size. Half of the models lie below it, the other half above. Unlike the average, the median is barely distorted by individual very expensive or very powerful outliers, and it therefore describes better what is usual in a group.

Unbranded products

Vacuum lifters sold without a recognizable brand name, often under a product description or a changing trade name. In the database, 32% of listings carry a brand name; the rest count as unbranded. Technically, that need not be a disadvantage, since the same hardware is quite often found in both branded and unbranded devices. The comparison is shown in Branded vs. unbranded.

USB-C

A universal charging port used to charge many vacuum lifters with a built-in battery. The advantage: one cable for smartphone, laptop and tool, and charging from a power bank or in the vehicle. In the database, 14% of cordless vacuum lifters charge via USB-C. The charging time depends on the power adapter used. The comparison with the removable battery is shown in Removable battery vs. USB-C.

Vacuum

A space with greatly reduced air pressure. With vacuum lifters, it means the low-pressure area between the suction pad and the workpiece. A complete vacuum is never reached; a clear negative pressure relative to the surroundings is enough. The better the vacuum, the greater the holding force. How an electric vacuum lifter creates and holds the vacuum is explained in How does an electric vacuum lifter work?.

Vacuum lifter

A hand tool that grips tiles, glass, stone and slabs by vacuum. A suction pad with a seal is placed on the surface, a pump or lever removes the air beneath it, and the outside air pressure presses the pad onto the workpiece. Vacuum lifters come in manual and cordless versions, in round, oval and narrow shapes. In the trades, they are often also called gripsters. The buying guide is a good place to start.

Vacuum lifting device

A general term for lifting equipment that grips loads by vacuum. It covers hand-held vacuum lifters as well as large units for cranes or mini excavators that move stone slabs, pipes or glass panes weighing several hundred kilograms. In the tile and glass trades, the term is often used synonymously with vacuum lifter. This site compares hand-held devices only.

Vacuum pump

The pump that draws the air out from under the suction pad on cordless vacuum lifters, usually a small electric piston or diaphragm pump in the handle. It starts when the lifter is applied and switches off as soon as the target value is reached. With automatic re-pump, it restarts on its own. On manual vacuum lifters, a pump plunger or a lever does this job.

Vibrating in

Bedding a tile into the adhesive bed by vibration. The adhesive spreads evenly, air bubbles escape and the tile sits fully and flat. This used to be done by tapping with a rubber mallet; today there are tile vibrators and vacuum lifters with a vibration function. The guide Vibrating tiles in with a vibration function explains how to get it right.

Vibration function

A built-in vibration motor that lets the vacuum lifter vibrate the tile into the adhesive bed after placing it. This improves adhesive coverage and prevents voids, especially with large formats. In the database, 4% of vacuum lifters have this feature, all of them with an oval pad. Whether it is worth it is shown in With vs. without vibration.

Warning signal

An audible or visual signal that a cordless vacuum lifter gives when the negative pressure falls below a safe threshold or the battery is almost empty. It supplements the display, because your eyes often wander while carrying. If the warning signal sounds, set the load down immediately in a controlled manner and check the seal, surface and battery before you continue working.

Watt-hours (Wh)

The unit for the energy a battery stores. It is calculated as voltage times capacity: an 18-volt battery with 2,000 mAh stores 36 Wh, a 3.7-volt battery with 4,000 mAh just under 15 Wh. Watt-hours make batteries with different voltages comparable, which mAh alone cannot do. For the runtime of a vacuum lifter, this figure says more than the capacity in mAh.