Milz Werkzeuge DE
Guide · Technology

Suction surfaces and pad shapes: round, oval, rectangular, narrow

The shape of the suction surface determines where a suction lifter fits and which load it can safely hold.

Contents

  1. Round suction surfaces
  2. Oval and rectangular pads
  3. Narrow suction surfaces
  4. Material and care

Round suction surfaces

Round is the most common shape. A round 200 mm pad has an area of around 314 square centimetres and holds a great deal under strong vacuum. Round pads are robust, inexpensive and forgiving to handle on smooth surfaces.

The drawback becomes apparent with narrow panels: a 200 mm circle requires a panel that is at least about 250 mm wide, otherwise the pad does not sit fully on it.

Oval and rectangular pads

Oval or rectangular bases adapt better to narrow surfaces. A 260 x 90 mm pad, for example, sits fully on a narrow strip, while a round foot overhangs the edge.

Rectangular pads are also found on large set lifters, where two suction points together carry a long slab. Full-surface contact is always important.

Narrow suction surfaces

Narrow pads are intended for fascias, window reveals, plinths and niches. They hold less load than large pads, but they fit in places where no other suction lifter can grip.

Before use, check the specified suction surface against the width of the panel. If the pad overhangs, contact area is missing and the load is distributed less effectively.

Material and care

  • Natural rubber: very good adhesion, sensitive to oil and UV.
  • NBR (nitrile): oil- and ageing-resistant, standard on construction sites.
  • Silicone: for glass and sensitive surfaces, temperature-stable.
  • Foam: for rough and textured surfaces, lower load.

    • This guide is editorial and general. For safety questions the manufacturer datasheet applies.