Block cylinders

with adjustable stroke end cushioning and optional stroke end control
double acting, max. operating pressure 500 bar

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Catalogue sheet

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Operating instructions

Available on demand.

Information Series

Description

B1.530 Block Cylinders with adjustable stroke end cushioning

Block cylinder with stroke end cushioning avoid a crash stop of the piston in the cylinder body in case of the following applications:

High piston speed
Additional load at the piston rod
An external stop to compensate the additional load is not possible

Just before the stroke end of the piston the cushioning spigot enters into the cushioning disc and reduces the flow rate in the return line and thereby also the piston speed. The residual speed can be adjusted in certain limits by an adjustable flow control valve. If required, the stroke ends can be controlled by pressure-resistant sensors.

Accessories (13)

Number

Item no.	CAD data	Description
Item no. 3000342	CAD data	Description O-ring 7 x 1.5 mm, NBR as per data sheet B1.5091
Item no. 3000347	CAD data	Description O-ring 10 x 2 mm, NBR as per data sheet B1.5091
Item no. 3001077	CAD data	Description O-ring 7 x 1.5 mm, FKM as per data sheet B1.5091
Item no. 3001078	CAD data	Description O-ring 10 x 2 mm, FKM as per data sheet B1.5091
Item no. 3829030	CAD data	Description High-pressure resistant sensor M12x1 mm for 15X7-XXX and 15X8-XXX ambient temperature –25 up to +80 °C 500 bar, as per data sheet B1.520
Item no. 3829049	CAD data	Description Connecting cable with pnp right angle plug M12 with 2 LED, cable length 3m as per data sheet G2.140
Item no. 3829078	CAD data	Description Connecting cable with straight pnp plug M12 without LED, cable length 3m as per data sheet G2.140
Item no. 3829180	CAD data	Description High-pressure resistant sensor M12x1 mm for 15X3-XXX up to 15X6-XXX ambient temperature –25 up to +80 °C 500 bar, as per data sheet B1.520
Item no. 3829204	CAD data	Description High-pressure resistant sensor M12x1 mm for 15X9-XXX ambient temperature –25 up to +80 °C 500 bar, as per data sheet B1.520
Item no. 3829227	CAD data	Description High-pressure resistant sensor M12x1 mm for 15X7-XXX and 15X8-XXX ambient temperature –25 up to +120 °C 500 bar, as per data sheet B1.520

Technology

Block cylinders with adjustable stroke end cushioning B1.530

If hydraulic cylinders are operated at high speeds, when the piston hits the stroke end position unimpeded, a high amount of energy is released and must be absorbed by the cylinder housing and the threaded bushing. This can lead to a reduction in the cylinder's working life. This can also result in undesirable effects on the actual function, caused by shaking and noise coming from the knocking.
Reducing the speed helps, of course. If this is not possible, however, it is recommended to use a cylinder with integrated hydraulic stroke end cushioning. In the last few millimetres of the stroke (e.g. 8 mm), this stroke end cushioning forces the hydraulic fluid through a hole or similar. By means of this orifice effect, the flow rate is throttled and the piston speed and the energy in the end positions is thus reduced.
The stroke end cushioning is adjustable and the cushioning effect can be adapted to the corresponding application. In addition, both end positions can be separately adjusted.