Filter
Product range

Hollow-piston cylinders

Clamping cylinders with round steel housing

and through hole in the piston

single and double acting

max. pushing force: 10 .. 153 kN
max. pulling force 10 .. 188 kN
clamping stroke: 6 .. 40 mm
piston diameter: 20 .. 80 mm
max. operating pressure: 500 bar

Series Data sheet Technical data
B1.7441
B1.7441
show
B1.7441 Hollow-piston cylinders

 

version with internal thread

single and double acting

max. operating pressure 500 bar

max. pushing force: 10 .. 153 kN
max. pulling force 10 .. 188 kN
clamping stroke: 6 .. 40 mm
piston diameter: 20 .. 80 mm
internal thread: M6 .. M24
external thread: M40 .. M120

Application notes
for single-acting clamping elements
Venting of the spring area
of clamping and support elements
data sheet A 0.110

show
figure 1: hollow-piston cylinders B1.7441
 

Hollow-piston cylinders B1.7441
The pistons of this cylinder range are provided with a through hole and internal thread. In connection with a standard tie rod and C-washer combination a variety of applications is possible.
The thread in the piston can be drilled out, if required.
If the hollow-piston cylinder is mounted onto movable parts, e.g. clamps, the oil has to be supplied through a high-pressure hose.

For operating pressures exceeding 350 bar only bolts, studs, or screws of material 10.9 must be used. It is important to torque the lock nut used sufficiently to prevent damaging the piston threads. When using single-acting hollow-piston cylinders, it is absolutely necessary to follow the instructions for bleeding of the spring area on data sheet A 0.110.

 

Seal kits
for hydraulic elements

data sheet S0.001

show
figure 1: hollow-piston cylinder with mounting flange
 

Mounting flanges (figure 1)
Lock nuts DIN 1804

see data sheet B1.7441

 
show
figure 1: workpiece with centre openings
 
show
figure 2: clamping fixture with hollow-piston cylinder and work support
 
show
figure 3: clamping fixture for rail profiles
 

Application example 1 (figure 1)
Hollow-piston cylinders in combination with push-pull bolt and “C”-washer can be used advantageously in many cases to clamp workpieces with centre openings.

 

 

Application example 2 (figure 2)
On the shown machine table, the workpiece is clamped with a hollow-piston cylinder and additionally supported with a work support, controlled by a sequence valve.
The support plunger of the work support is retracted in off-position to facilitate workpiece loading. Contact is effected by means of spring force. The savings in workpiece exchange time, compared to a mechanical clamping system amounts to 58%.

Application example 3 (figure 3)
This clamping fixture is for milling operation on a light extruded rail. Workholding by means of hollow-piston cylinders in individual clamping stations mounted on a base plate. Positioning and support of the rail is effected with two longitudinal members matching the cross section of the rail.