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BLOCK CYLINDERS

 


Aluminum Block Cylinder
with Anti-Rotation Plunger
Position Sensing Option






Unique tri-lobe plunger prevents
rotation.





Mounting Option 1





Mounting Option 2





Mounting Option 3



 
5000 psi max
Double Acting


FEATURES: These Block Cylinders feature our exclusive anti-rotation plunger that can be used as a guiding element to maintain radial orientation. The plunger has a unique tri-lobe shape to prevent rotation. These double-acting block cylinders have an aluminum body and a magnetic piston, to allow using Magnetic Sensors for position monitoring (order Magnetic Sensors and Connecting Cables separately). Compact design with many applications. Easy to mount on flat surfaces, horizontally or vertically. Excellent for pressing and assembly operations, with high forces available. Can also be used for pulling, by reversing the A and B ports.

ANTI-ROTATION PLUNGER: Normally a hydraulic cylinder cannot be used as a guiding element, because the plunger can rotate. External guides are often cumbersome and expensive. The special feature of this Block Cylinder is the large-diameter plunger with a tri-lobe shape to prevent rotation. A long guide bushing resists considerable torque, and compensates for radial forces and eccentric loads. The plunger end has a 10:1 taper for secure mounting of tools. Maximum radial play is +/-0.3°. This Block Cylinder is well suited for applications such as: direct operation of tools for joining, pressing, and stamping; guided operation of tool sets (cutters, stamps, etc.) for plastic molded parts; guided placement and pressing-in with assembly tools; guided pressing-out with disassembly tools.

SIZES: Available in three sizes, each with a choice of three stroke lengths up to 100mm — see Dimensions page for part numbers. Push force at 5000 psi:
 6200 Lbs
 9700 Lbs
 15000 Lbs

CLAMPING ACTION: Applying fluid pressure to the A port advances the plunger. Switching pressure to the B port positively retracts the plunger.

MAGNETIC SENSORS: These electronic sensors detect the magnetic field of the magnetic piston. Switching points can be easily adjusted by sliding the sensors in the slots. Magnetic Sensors offer several advantages over conventional reed switches, including indifference to shock and vibration, a bounce-free output signal, only one switching point, wear resistance, protection against reverse battery, and protection against short circuits. Voltage 10-30 VDC. Choice of PNP or NPN output signal. Operating temperatures up to 200°.F.

DESIGN CONSIDERATIONS: Since the plunger provides tool guidance, do not use tools which are also externally guided, because this redundant guiding can cause increased friction and wear. Since operating pressure is limited to 5000 psi, flow rate to the cylinder must be restricted with a Flow Control Valve in both the advance and return line to prevent temporary pressure spikes. Each line must have free flow out of the cylinder. Aluminum Block Cylinders are not suitable for blanking or punching operations. Nearby steel structures can influence the the magnetic field of the piston, thereby affecting the switching points. This can usually be compensated by moving the Magnetic Sensors slightly. Covers are required to keep away ferritic chips.

MOUNTING: Several possible mounting methods: 1) insert four socket-head cap screws from the plunger end, through the four counterbored holes parallel to the plunger; 2) insert four socket-head cap screws from the bottom end, through the four counterbored holes parallel to the plunger; 3) insert two socket-head cap screws through the two broad-side holes perpendicular to the plunger. Method 3 requires that the Block Cylinder be backed up for pressures over 2300 psi by a rectangular strip or dowel pins with a height at least 1/3 of the B dimension.

FLUID CONNECTION: Two 1/4" BSPP ports. Because of the aluminum body, use soft-seal port fittings CLR-9208-132-F. Soft-seal fittings are limited to 5000 psi. Do not use NPT fittings.

OPTIONAL VITON SEALS: For high-temperature applications (212° to 300° F), we offer Viton seals in all sizes. Please contact factory for more information.

CONSTRUCTION: Plunger > Steel, case hardened. Body > Aluminum, anodized.
Carr Lane Roemheld Mfg. Co.
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