Product category:
Pneumatic Actuators, Motors, Accessories
News Release from: Bosch Rexroth - Pneumatics | Subject: GPC-E
Edited by the Engineeringtalk Editorial
Team on 28 May 2004
Precision cylinder goes to extremes
The GPC series claims a number of advantages over standard pneumatic cylinders, notably precision movement, antirotation capabilities and the capacity to withstand high side loads.
The GPC (Guide Precision Cylinder) series claims a number of advantages over standard pneumatic cylinders, notably precision movement, antirotation capabilities and the capacity to withstand high side loads Newly introduced is the GPC-E (Extreme) version, with still higher load capacities and integral stroke adjustment
This article was originally published on Engineeringtalk on 28 Mar 2000 at 8.00am (UK)
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Suitable for a 1.3 to 8bar working pressure range, it is available in 12, 16 and 20mm bores and standard stroke lengths to 150mm, in slide or ball bearing versions.
Consisting of a central piston and two rigid guide rods supported by slide bearings and ball bearings, GPCs are typically used as carriers for grippers, suction cups, tools and workpieces in material handling and automation applications, as well as for stoppers in conveyor systems and defining object positions in machining and spot welding.
A GPC can also carry a second axis, with a smaller GPC fitted directly onto the front plate or a RexMover roller cylinder or MSC mini slide connected via a special adapter.
The latest GPC-E version offers the same precise movement and functionality, but with higher load capacities and built-in stroke adjustment.
It is equipped with longer guide rods, which are connected to the rear plate by hydraulic shock absorbers, providing the means of finally adjusting the stroke length.
This facility is useful for end-position adjustment when picking or placing a workpiece and means that off-the-shelf stroke lengths can be selected for non-standard piston strokes.
Optional adjustment of the return stroke is also possible with separate accessories, adding to the cylinder's versatility.
Despite weighing between 0.4 and 1.2kg only, depending on stroke length, the GPC-E 12mm bore is able to withstand static forces up to 110N and a dynamic load of almost 1kg, which is well ahead of the competition.
At the upper end of the scale, a 20mm bore unit, between 0.7 and 1.9kg in weight, will accept a static force of 275N and a dynamic load of 7.5kg.
Moreover, the GPC-E is highly price competitive at some 15% cheaper than comparable models.
With a magnetic, stainless-steel piston rod for positional feedback, corrosion-resistant guide rods, anodised aluminium body and rear plate, and galvanised steel front plate, the GPC-E is designed and built for rugged working conditions.
For highly corrosive environments, it can also be specified with stainless steel guide rods.
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