Hollow-piston cylinders
Clamping cylinders with round steel housing and through hole in the piston
single and double acting
Serie (1)
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single acting with spring return – piston Ø 20 mm, stroke 6 mm – max. 500 bar, as per data sheet B1.7441 -
piston Ø 20 mm, stroke 10 mm – max. 500 bar, as per data sheet B1.7441
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single acting with spring return – piston Ø 32 mm, stroke 8 mm – max. 500 bar, as per data sheet B1.7441
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piston Ø 32 mm, stroke 12 mm – max. 500 bar, as per data sheet B1.7441
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single acting with spring return – piston Ø 40 mm, stroke 10 mm – max. 500 bar, as per data sheet B1.7441
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piston Ø 40 mm, stroke 16 mm – max. 500 bar, as per data sheet B1.7441
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single acting with spring return – piston Ø 50 mm, stroke 12 mm – max. 500 bar, as per data sheet B1.7441
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piston Ø 50 mm, stroke 20 mm – max. 500 bar, as per data sheet B1.7441
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single acting with spring return – piston Ø 63 mm, stroke 16 mm – max. 500 bar, as per data sheet B1.7441
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piston Ø 63 mm, stroke 32 mm – max. 500 bar, as per data sheet 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.
hollow-piston cylinders B1.7441
PDF Data sheets
Hollow-piston cylinders version with internal thread – single and double acting – max. operating pressure 500 bar
Catalogue sheet B1.7441General application notes General characteristics of hydraulic equipment
Catalogue sheet A 0.100Application examples
Application example 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.
workpiece with centre openings
Application example 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%.
clamping fixture with hollow-piston cylinder and work support
Application example 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.
clamping fixture for rail profiles
