+1 (844) 430-0510 Info@GRABO.com


Glass suction is used to hold things to glass or to lift a sheet of glass. They can be attached to any flat, non-porous surface glass and can hold heavy items if applied correctly. They're made up of soft rubber and stick to a surface using the force of atmospheric pressure.

Good glass suction must meet three criteria: It must have a "cup" shape with a concave center and flat spreading sides, it must stick to a flat, non-porous surface, and be made from air-tight material.

A suction lifter (or suction pad) is a type of glass suction used for commercial and industrial lifting operations. In the housing sector, they're often used to move large, smooth objects like glass panes, kitchen countertops, floor tiles, and so on. They're commonly hand-operated, but some are hoist-operated.

Suction lifters follow the same model as a glass suction, creating a vacuum between the surface to be lifted and the suction. The vacuum is made by pushing a lever or handle on the suction cup.

Their load lifting capacity is almost dependent on the type, size, number of suction cups, and lifting mechanism. Typical safe working loads for hand-operated suction lifters range from ten kg to sixty kg per lifter, with lifters formed from one to four suction cups. Hoist-operated lifters can have from one to fifty or more suction cups and can lift weights in excess of one thousand kilograms.

How Do Glass Suction Work?

Glass suction used external pressure, which is greater than internal pressure. To accomplish this, glass suction uses the negative pressure created by “pushing” out the fluid contained in the cup (cavity) and hence the positive pressure of the fluid trying to return in. To help prevent fluid from “seeping” back to the cavity of the suction cup and diminishing the suction cup's ability to stick to a surface, the suction cup's rim must contact the surface to form a firm seal.

The length of time it takes a glass suction to lose partial vacuum on the surface of an object depends on the time it takes for the fluid to get between the cup and surface, equalizing the pressure with the encircling atmosphere. This is one of many factors, including but not limited to the porosity of the material, the quality of the rim of the cup, and the quantity of perpendicular pulling or shear force applied.

Things to Know Before Buying Glass Suction

Not all Glass Suctions are created equal, as some were created to be more effective on one surface than another. To identify the right kind of glass suction handle you need, it is vital to know the key characteristics of your materials and the dimensions or logistical constraints of your project. The following are the things to consider before buying glass suction:

Material: This is usually the only identifiable characteristic of your project. Insulated metal panels are a superb example of standard non-porous glazing suction cups that can create unwanted impressions on the material or fail to form a secure bond. The type of material will often help determine the surface texture and coverings and the glass suction needed to handle it. Materials like stone and insulated metal panels typically have rough or irregular surface traits against the common non-porous surface of most flat glass.

Surface Texture: This is another vital thing to consider when determining the type of glass suction to use for your project. Surface grain (ridges) on seemingly flat insulated metal panel surfaces may cause the suction cup to leak. This can weaken the suction's grip and, when using vacuum lifting systems, put unnecessary strain on the unit. When this is the case, glass suctions with rubber seals can be effective because the sponge rubber seal is designed to help cushion the safety of the vacuum against rough and irregular surfaces. Additionally, materials like patterned glass adhere better to medium-flexible malleable rubber as compared to plain rubber.

Surface: This is another major characteristic of your material. The essential question to ask yourself is whether or not your material is curved or flat. The shortage of pressure caused by expelling the fluid out of the low-pressure cavity of the suction cup keeps the suction cup adhered to the surface. It is vital to note that contact between the lips of the suction cup pad and the surface is important. Thus, the depth of the suction cup cavity plays a crucial role in its ability to contact the surface of curved surfaces, forming an effective barrier from the seepage of atmospheric pressure. A suction cup engineered for flat surfaces typically doesn't take this contour into consideration; therefore, the depth of the suction cup is typically an indicator of the surface it had been designed to perform on. In this case, you must choose suction cups that are specifically designed for curved surfaces.

Surface Temperature: Different materials and their application can affect the surface temperature and consequently impact the alternatives you create when choosing the right kind of suction cup. For example, terraforming processes, or removing glass from tempering ovens often yield high heat surface areas and, consequently, require a far better heat-resistant compound used on the suction cup.

Surface Treatments or Coatings: Certain materials, whether in the manufacturing process or as a post-production measure, are often coated or surface-treated differently. Petroleum-based oils are often found on sheet and plate metals, whereas low emissivity (Low-E) glass coatings are commonly found in insulated glass window units. Taking the surface treatment or coatings of your materials into account is significant in identifying the suitable kind of suction cup to use. For example, oil-resistant rubber is typically best fitted to sheet and plated metals. In contrast, coating-compatible rubber is better suited to handle Low-E glass and other coated materials without leaving markings.


It is important to know what you want when it comes to glass suctions. Go for the best one that fits your project and follow the user manual. You can find more information and materials about glass suctions online.


glass suction handles