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Series
B1.711

Threaded-Body Cylinders with Locking Piston

single acting with spring return,
max. operating pressure 500 bar
Threaded-Body Cylinders with Locking Piston
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Operating instructions
Information Series
Description
B 1.711 Threaded-Body Cylinders with Locking Piston

Application
Hydro cylinders with locking piston have a relatively little clamping force, but a high retention force in opposite direction. Therefore they are particularly suitable for clamping of thin-walled workpieces with minimum deformation as well as for “floating clamping”.

Description
Hydro-cylinders with locking piston are single acting plunger cylinders. When pressurising the element, the piston will be expanded and locked in the cylinder body. The hydro-cylinder with locking piston does not only clamp the workpiece, but compensates also the machining forces which are up to five times higher and are directed against the clamping force.

Function
If a force FB higher than the hydraulic clamping force Fhyd, acts on a standard clamping cylinder, the piston will be pushed back due to the compressibility of the oil.
In such cases the operating pressure has to be increased or a larger clamping cylinder or additional work supports have to be used. The hydro cylinder with locking piston does not only clamp the workpiece, but compensates also the machining forces which are up to five times higher and are directed against the clamping force.

Products (1)
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type
threaded-body cylinder with locking piston (1)
functioning
single acting with spring return (1)
max. operating pressure [bar]
500 (1)
seals
NBR (1)
hydraulic ports
for drilled channels (1)
connection for positive air pressure protection
without (1)
position monitoring
without (1)
clamping stroke [mm]
1 x 10 (1)
max. clamping force [kN]
5 (1)
exterior or interior clamping
for exterior and interior clamping (1)
max. retention force [kN]
10 (1)
separate locking port
without (1)
Item no. CAD datatypefunctioningmax. operating pressure [bar]seals
Item no.
CAD data
type
threaded-body cylinder with locking piston
functioning
single acting with spring return
max. operating pressure [bar]
500
seals
NBR
Properties
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Item no.
type
threaded-body cylinder with locking piston
functioning
single acting with spring return
max. operating pressure [bar]
500
seals
NBR
hydraulic ports
for drilled channels
connection for positive air pressure protection
without
position monitoring
without
clamping stroke [mm]
1 x 10
max. clamping force [kN]
5
exterior or interior clamping
for exterior and interior clamping
max. retention force [kN]
10
separate locking port
without
Accessories (2)
Item no. CAD data Description
Item no.
CAD data
/
Description
Seal Delrin 28 x 22 x 1,5 mm see page B1.460
Item no.
CAD data
/
Description
Leg spring Ø 9 x 1,5 x 5 mm 500 bar, see page B1.372
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Application examples
Application example 1

Simple collet for ”floating clamping”

Two clamping bars with threaded-body cylinders with locking piston are fixed on a base plate and hydraulically connected by drilled channels. The axial block fixed in the centre is used as guide for both clamping jaws. An installed return spring moves the clamping jaws to its off-position.
"Floating" clamping, i.e. the uniform and tongs-type contact at the workpiece independent of its position is possible due to the hydraulic pressure compensation between the cylinders. Only different spring forces can influence the uniformity. After the pressure increase, the two locking pistons avoid a ”further floating” of the clamping point.