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Accessories for hydraulic cylinders

Magnetic sensors for position monitoring

contact bolts

spherical bearing

Magnetic sensors: Operating voltage: 10 – 30 VDC
Contact bolts connecting threads: M5 .. M48
Spherical bearing: plain bearing with lubricating nipple

Series Data sheet Technical data
G2.140
G2.140
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G2.140 Magnetic sensors for position monitoring

 

of block cylinders and pneumatic swing clamps

body material:
aluminium, black anodised
operating voltage: 10 – 30 V DC
code class as per DIN 40050 IP 67
ports: M8 - plug

G3.800
G3.800
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G3.800 Contact bolts

 

for cylinder diameter

12 .. 125 mm

connecting threads: M5 .. M48

G3.810
G3.810
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G3.810 Spherical bearings

 

Rod end bearings and bearing blocks for hydro-cylinders and block cylinders

for hydro-cylinders B1.282:
with piston rod Ø d 16 .. 50 mm
bearing eye Ø e fit H7: 12 .. 40 mm

for block cylinders B1.542
with piston rod Ø d 16 .. 40 mm
bearing eye Ø e fit H7: 16 .. 40 mm

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figure 1: magnetic sensors for position monitorings
 
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figure 2: rod end bearings and bearing blocks for hydro-cylinders or block cylinders
 

Magnetic sensors (figure 1)
Electronic magnetic sensors allow position monitoring of the pistons of cylinders with non-magnetisable housings (aluminium or bronze).
A permanent annular magnet is fixed to the piston, and its magnetic field is detected by the magnetic electronic sensor.
The magnetic sensors are fixed outside in the lengthwise slots of the cylinder body. The switching points are adjustable by displacement of the magnetic sensors in the lengthwise slots of the body.

Rod end bearings (figure 2 at the left)
The rod end bearings consist of a spherical bearing mounted in a housing that can be screwed onto the piston rod of hydro-cylinders or block cylinders.
The spherical bearing is a plain bearing that allows a force transmission with a tilting angle of maximally 4°.

Bearing blocks (figure 2 at the right)
The bearing blocks consist of a spherical bearing mounted in a housing that can be screwed onto the cylinder base of hydro-cylinders or block cylinders.
The spherical bearing is a plain bearing that allows a force transmission with a tilting angle of maximally 4°.

 

Magnetic sensors
Monitoring of several positions
In the two lengthwise slots of the cylinder body several sensors can be fixed (depending on the length of the slot or the stroke).
In one slot, the minimum distance between the switching points is 6 mm; with two slots it is 3 mm.

Influencing the magnetic field with adjacent, magnetisable components (e.g. steel parts)
In order to guarantee perfect functioning, it is recommended to maintain a distance of at least 25 to 30 mm between magnetic sensor and magnetisable components. The function is indeed possible
with a smaller distance but this depends highly on the individual circumstances for fitting. Thus ordinary steel bolts can also normally be used for fastening the cylinder.
In borderline cases, screws of non-magnetisable steel (e.g. VA screws) can cause an improvement in the magnetic field.

Influencing the magnetic field with adjacent magnetic sensors
If several cylinders with magnetic sensors are installed directly adjacent to one another, the magnetic sensors can have a reciprocal influence and malfunctions occur. Troubles of functioning can occur. A magnetisable steel sheet can help, placed between the cylinders or magnetic sensors as a shield.

Application notes for
Magnetic sensors
From the User - For the User 118