Translation Actuators for Segment Erection Systems

Product Specifications

Technical details and manufacturing context for Translation Actuators

Definition

Translation actuators are precision mechanical devices integrated into segment erector systems to provide controlled linear displacement for positioning and aligning concrete or steel tunnel segments during construction. They convert rotational input into precise linear output to achieve accurate segment placement. These actuators typically operate using screw mechanisms (ball screws or lead screws) or hydraulic/pneumatic cylinders that convert rotational motion from motors or hydraulic pressure into controlled linear movement. Position feedback systems ensure precise displacement control. The actuators are available in configurations with operating pressures ranging from 1.0 to 1.6 MPa, stroke lengths from 100 to 600 mm, and thrust capacities from 5 to 50 kN at 1.6 MPa. Positioning accuracy is ±0.5 mm with linear encoder feedback. Operating temperature ranges from -20°C to 80°C for standard seals, with a high-temperature option up to 150°C. Protection ratings are IP65 to IP67 per IEC 60529, suitable for washdown environments. Supply voltage is 24 V DC ±10%, with an optional 230 V AC integrated transformer. Power consumption ranges from 120 to 480 W at rated thrust and speed. Speed is adjustable via PWM or analog signal from 5 to 50 mm/s. Cylinder bore diameters range from 40 to 100 mm per ISO 6020-2, determining thrust at given pressure. Materials include anodized aluminum body (6061-T6 per ASTM B221) and stainless steel piston rod. Weight ranges from 15 to 60 kg depending on stroke and bore size. These actuators are designed for precise segment alignment in tunnel construction, offering reliable performance in demanding environments. For procurement, verify model-specific values and standards with the legal manufacturer or supplier.

Working Principle

Translation actuators convert rotational motion from an electric motor or hydraulic pressure into controlled linear movement using screw mechanisms (ball screws or lead screws) or hydraulic/pneumatic cylinders. Position feedback systems, such as linear encoders, monitor displacement and adjust the input to achieve precise positioning. The actuator's thrust and speed are determined by the bore diameter, operating pressure, and motor or hydraulic supply. Selection requires specifying stroke length, thrust capacity, speed range, and environmental conditions. Verification questions include checking the operating pressure range, stroke length, thrust at required pressure, positioning accuracy, and protection rating. Maintenance signals include unusual noise, reduced speed, or position drift, indicating wear or seal failure. Failure boundaries include exceeding maximum thrust or stroke limits, operating outside temperature or pressure ranges, or using incompatible fluids.

Common Materials

Alloy Steel, Stainless Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Stroke Length	100–600 mm	Custom strokes available on request
Thrust Capacity	5–50 kN	Peak thrust at 1.6 MPa
Positioning Accuracy	±0.5 mm	With linear encoder feedback
Operating Temperature	-20–80 °C	For standard seals; high-temp option up to 150°C
Protection Rating	IP65–IP67	IP67 for washdown environmentsIEC 60529
Supply Voltage	24 ±10% V DC	Optional 230 V AC with integrated transformer
Power Consumption	120–480 W	At rated thrust and speed
Speed Range	5–50 mm/s	Adjustable via PWM or analog signal
Cylinder Bore Diameter	40–100 mm	Determines thrust at given pressureISO 6020-2
Material	6061-T6	Anodized aluminum body; stainless steel piston rodASTM B221
Weight	15–60 kg	Depends on stroke and bore size

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Lead Screw
Converts rotational motion to linear displacement

Material: Alloy Steel
Motor Housing Part
Protects and contains the drive motor

Material: Cast Iron
Position Sensor
Provides feedback for precise position control

Material: Electronic Components
Electric Motor
Drives the assembly; the BOM already lists the housing built to contain it.

Application & selection

Application Fit & Sizing Matrix

Operational Limits

pressure:	Up to 10 bar
temperature:	-20°C to +80°C
load capacity:	Up to 50 kN
stroke length:	50-2000 mm
operating speed:	0.01-0.5 m/s

Media Compatibility

✓ Hydraulic oil (ISO VG 32-68) ✓ Water-glycol fluids ✓ Dry inert gases

Unsuitable: Abrasive slurry environments with >5% solids concentration

Sizing Data Required

Required force/thrust (kN)
Stroke length (mm)
Operating cycle frequency (cycles/hour)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause

Seal degradation and leakage

Cause: Exposure to incompatible fluids, extreme temperatures, or particulate contamination leading to seal hardening, cracking, or extrusion.

Mechanical binding or jamming

Cause: Misalignment during installation, excessive side-loading, internal component wear (e.g., bearings, bushings), or accumulation of debris in the actuator mechanism.

Maintenance Indicators

Audible grinding, scraping, or knocking noises during operation indicating internal mechanical interference or wear.
Visible fluid leaks (hydraulic oil or pneumatic air) around seals or fittings, or erratic/unstable movement during positioning.

Engineering Tips

Implement strict alignment procedures during installation and use alignment verification tools to prevent side-loading and premature wear on internal components.
Establish a proactive contamination control program, including regular fluid analysis (for hydraulic types), proper filtration, and seal compatibility checks with operating fluids.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards

ISO 15552: Pneumatic linear actuators with detachable mountings ANSI/B93.5: Hydraulic fluid power - Linear actuators DIN EN 1570-1: Safety requirements for lifting tables

Quoted from the published standard.

Manufacturing Precision

Stroke length: +/-0.5mm
Parallelism of mounting surfaces: 0.05mm

Quality Inspection

Leakage test (pneumatic/hydraulic)
Load capacity and endurance cycling test

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

Compare the published product scope and source details, then include your specifications and quantity in an enquiry.

Manufacturers of Translation Actuators

12 companies list this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Beijing Jike Instrument

Beijing, CN

Also makes: Vibration Isolation Platform, Motion Controller, Optical Mount and 3 more