German ROEMHELD Double-acting Universal Cylinder B1.311 embedded installation Max 400 Bar

Example Models:

  • 5112303 | B1.311-25/14/32
  • 5112403 | B1.311-32/18/40
  • 5112503 | B1.311-40/22/64
  • 5112603 | B1.311-50/28/64
  • 5112703 | B1.311-63/36/64
  • 5112303-V (25 mm bore, 32 mm stroke, FKM)
  • 5112403-V (32 mm bore, 40 mm stroke, FKM)
  • 5112503-V (40 mm bore, 64 mm stroke, FKM)
  • 5112603-V (50 mm bore, 64 mm stroke, FKM)
  • 5112703-V (63 mm bore, 64 mm stroke, FKM)

    Product Introduction of ROEMHELD Universal Cylinder B1.311 Series

    Product Overview

    The B1.311 is a double-acting hydraulic universal cylinder developed by ROEMHELD, a German specialist for industrial clamping technology. Rated for a maximum operating pressure of 400 bar, it is designed for embedded installation inside smooth through holes of fixture plates and machine frames. Positioned as a bidirectional linear actuator, it serves for lifting, ejecting, positioning and clamping tasks in machine tool fixtures and automation equipment.
    Mounting is realized by circlips, which enable flexible multi-level axial positioning adjustment inside the bore. The cylinder supports both radial and axial hydraulic port connection, offering great flexibility for compact manifold layout. Equipped with an integrated rod wiper, it effectively blocks metal chips, coolant and workshop contamination, ensuring long service life under machining environments.
    Q: What’s the MOQ of customized tie-rod cylinder?

    A: Depends on the style of tie-rod. We would like to cast and forge once the quantity above 100 pcs.

    Q:What’s the lead time of customized tie-rod cylinder?

    A:  Well, it depends on the quantity and style of hydrualic cylinders, at least 60 days if we make casting and forging, at least 35 days by maching.

    Q: Are you the manufacturer of hydrualic cylinder?

    A: Sure, we are the manufacutuer and trading of hydraulic cylinder.

    Q: What is the difference between double acting and single acting cylinders?own controlled by the pump or the valve or is it only one speed?

    A: Double-Acting-have a port at each end, supplied with hydraulic fluid for both the retraction and extension. Single-Acting-hydraulic fluid enters through

    a port at one end of the cylinder, which extends the rod by means of area difference. An external force or gravity returns the piston rod.

    Q: I have a drawing, could you customized cylinder as my drawing?

    A: Sure. Show us the drawing, we will quote for you soonest.

    Q: Could you make the cylinder which is not on the above data sheet?

    A: Yes, we make and supply a wide rang of hydrualic cylinders as a proffetional manufacture, there are only some kinds of them show on the website. Freely contact us to get more information.

    • Operation Type: Double-acting hydraulic (independent extend & retract control)
    • Max Rated Operating Pressure: 400 bar
    • Standard Piston Bore Sizes: 25 / 32 / 40 / 50 / 63 mm
    • Standard Stroke Options: 32 mm / 40 mm / 64 mm
    • Standard Sealing Kit: NBR (-20 °C ~ +80 °C); optional FKM/Viton high-temperature sealing upgrade (-20 °C ~ +120 °C)
    • Hydraulic Port Thread: G1/4
    • Piston Rod End: Internal metric thread for clamping head connection
    • Mounting Method: Inserted into smooth through hole, fixed by circlip at different axial positions

    Embedded Circlip Mounting with Adjustable Position

    The cylinder body can be directly inserted into unthreaded smooth through holes. Circlips allow continuous axial position adjustment without extra lock nuts or adapter plates, saving fixture space and simplifying installation for multi-station compact clamping systems.

    Dual Port Arrangement (Radial + Axial)

    Hydraulic oil ports can be connected radially or axially. Designers can flexibly select piping directions to avoid pipeline interference in dense fixture cavities.

    Stable Bidirectional Force Output

    Double-acting structure delivers controllable thrust and pull force. Unlike single-acting spring return cylinders, retraction speed and force are fully hydraulically regulated, ideal for high-frequency reciprocating ejection, positioning and pressing operations.

    Enhanced Contamination Protection

    Built-in external wiper prevents ingress of cutting fluid, fine metal swarf and dust. Combined with high-performance sealing system, it minimizes internal leakage and improves durability under harsh CNC machining conditions.

    Compatibility with ROEMHELD Hydraulic Ecosystem

    Seamlessly matched with ROEMHELD hydraulic power units, pressure boosters, multi-port rotary unions and position sensor accessories to form complete hydraulic clamping solutions for rotary tables and flexible machining fixtures.