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GRABO Suction Lifter for Glass - Things to take into consideration

In any situation where you need to lift an item or weight with a vacuum, a suction cup is usually made use of as the line between the load and the actuator. There are different kinds of the cup with different designs out there. Each one of these has its advantage and its area of specialization.

Before we go into a discussion about making use of glass lifter suction, it is imperative that we first understand how a suction cup works. A suction cup is attached to the surface of the object to be lifted after the pressure under the cup has been reduced. The higher atmospheric pressure outside the cup presses it down and holds it to the surface that’s to be handled. The internal and lower pressure is then attained by joining the cup to a vacuum system that releases most of the air found under the cup.

When you are producing a vacuum system that will lift or hold suction cups, it is advisable to start the project at the point of initial contact and then work back to the vacuum flow source, which then decides the force developed. If you dutifully size all the components, the best mix of capacity and efficiency can be achieved. Before selecting a cup for your glass lifter suction, consider the surface, porosity, load, texture, size, and lifting direction.

Types of Lifters

A dual suction cup — usually with a 30-durometer lip and 50-durometer body — can improve compliance while maintaining stability. Another thing to consider is the presence of lubricants. The material you are using in making the cups must be resistant to lubricant. If not, contact with this material can cause the elastomer to become gummy or sticky or make it break or crack in the worst-case scenario.

The possibility for surface marking is another factor to take into consideration. Products such as glass or styrene plastic with a neatly polished surface can maintain a cup imprint, just in the same way a handprint can appear on the same type of surface. A mark-free cup, shaped without a release agent, avoids imprint or stain. Objects that will later be glazed or painted may need special cups. Silicone form release agents and silicone rubber can leave stains that only become noticeable when the coating or paint fails to adhere to that location.


The porous nature of materials that the glass lifter suction will be handling is another thing to be considered; questions like is the material solid and nonporous like glass or is it porous like paper are questions that are to be answered beforehand. The answer to these questions will inform your call to action.

Porosity is defined as the amount of outer atmosphere that passes through an object under a vacuum. Solid material with no pores or openings will not agree outside the atmosphere. Paper, for example, is full of tiny pores and leaks a considerable amount of air into any application. Temperature extremes at the contact surface also can affect cup performance. Whether the materials will be coming out of an oven or a refrigerator, it is better to answer this before learning how a specific cup material will respond.

Weight and size

The weight and dimensions of the objects are to be known and determined beforehand because these two factors determine the number and size of the suction cups that the glass lifter suction will be requiring. Any design should consider these two factors, and it is a reasonable step to take. Object size also decides the positioning of the cups. Suction cups should always be positioned relative to the center of the object of gravity. This allows for accurate positioning of the lifting actuator.

Cup choice

When the object’s weight and dimensions are known, the following rational decision is the kind of cup and its size. Take note that there is possibly a specific cup design that is most appropriate for the surface and texture of the item to be lifted. It is wise to use as large a cup as possible. The system can work at a lesser level of vacuum force. There are two major advantages to this: the first is faster evacuation time, and the second advantage is a lengthier cup life.

Pump selection

Once the components that go before the vacuum pump have been determined, it is time to select and size the vacuum pump. Numerous aspects are involved in this process: the system, central or dispersed? What is the speed of the application? How much capacity must be evacuated? How porous is the product being operated? What vacuum level is required? Even though, the issue of central versus dispersed systems sometimes comes down to the designer’s subjective choice. Some prefer a single large pump, and others prefer smaller pumps dedicated to specific applications. Each arrangement has its benefits and disadvantages.

It is important to patronize a reliable manufacturer that will help you select a glass lifter suction.

The Nemo GRABO, for example, combines both a not that big size with big strength. Which will make that the GRABO models are suitable for almost every application. Thousands of testimonials show their satisfaction with their GRABO-Suction Lifter. Check more here: www.grabo.com