Theta-axis Actuator for Placement Heads | Precision Rotary Component

Product Specifications

Technical details and manufacturing context for Theta-axis Actuator

Definition

The Theta-axis Actuator is a critical component within a Placement Head assembly, responsible for precisely rotating electronic components, semiconductor chips, or other small parts to their correct angular orientation before placement onto substrates, circuit boards, or other target surfaces. It ensures accurate rotational alignment during automated assembly processes. This actuator is designed for use in machinery and equipment manufacturing, particularly in pick-and-place systems, surface-mount technology (SMT) lines, and semiconductor packaging equipment. The unit typically features a housing made of anodized aluminum alloy (6061-T6 per ASTM B211), with steel shafts and bearings, copper motor windings, neodymium magnets, and engineering plastics for insulation and bushings. The actuator operates on a supply voltage of 24 V DC (±10%) and consumes 0.5–1.5 A at 24 V DC, including solenoid valves. It requires an operating pressure of 0.4–0.7 MPa, with torque dropping below 0.4 MPa. The rated torque ranges from 0.5 to 5.0 N·m at 0.6 MPa supply pressure. The rotation angle is adjustable from 0 to 360 degrees with adjustable end stops. Position repeatability is ±0.05 degrees with encoder feedback. The maximum axial load is 50–200 N at the center of the output flange, and the maximum radial load is 30–100 N at 10 mm from the flange face. The operating temperature range is -10 to 60 °C (non-condensing). The protection class is IP54 to IP65 with optional seals, per IEC 60529. The weight ranges from 1.2 to 3.5 kg, depending on size and options. These values are directory reference ranges and must be confirmed for the specific model and application with the legal manufacturer or supplier. The actuator is not a standalone product but a component intended for integration into a larger assembly. It is not certified or compliant with any standards beyond those listed; the listed standards are procurement references only.

Working Principle

The actuator receives digital commands from a motion controller, which are converted into precise rotary motion. This is commonly achieved through a servo motor or stepper motor coupled with a high-resolution encoder for closed-loop feedback. The motor drives a shaft or spindle, often via a precision gear reduction system or direct drive, to achieve the required angular positioning accuracy and torque for component rotation. The encoder provides real-time position feedback to the controller, enabling precise angular positioning. The actuator may also include solenoid valves for pneumatic assist or braking, depending on the configuration. The working principle is based on electromechanical conversion, where electrical energy is transformed into mechanical rotation with high precision and repeatability.

Common Materials

Aluminum alloy (housing), Steel (shaft/bearings), Copper windings (motor), Neodymium magnets (motor), Engineering plastics (insulation/bushings)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Torque	0.5–5.0 N·m	At 0.6 MPa supply pressure
Rotation Angle	0–360 °	Adjustable end stops
Position Repeatability	±0.05 °	With encoder feedback
Max. Axial Load	50–200 N	At center of output flange
Max. Radial Load	30–100 N	At 10 mm from flange face
Operating Pressure	0.4–0.7 MPa	Below 0.4 MPa torque drops
Supply Voltage	24 ±10% V DC	For encoder and solenoid valves
Current Consumption	0.5–1.5 A	At 24 V DC, including valves
Operating Temperature	-10–60 °C	Non-condensing
Protection Class	IP54–IP65	IP65 with optional sealsIEC 60529
Body Material	6061-T6	Aluminum alloy, anodizedASTM B211
Weight	1.2–3.5 kg	Depends on size and options

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

Servo Motor
Provides controlled rotary motion through electromagnetic principles.

Material: Steel, copper, neodymium
High-Resolution Encoder
Measures angular position and provides feedback for closed-loop control.

Material: Glass/plastic disk with optical patterns, photodetectors
Precision Bearing Part
Supports the rotating shaft with minimal friction and play.

Material: Steel (often ceramic balls for high precision)
Housing Part
Protects internal components and provides mounting interface.

Material: Aluminum alloy
Gear Reduction System Optional
Steps down motor speed to raise angular resolution and torque, on geared versions.
Solenoid Valve Optional
Switches the pneumatic assist or the brake, on configurations that have them.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Placement Head

View system integration details

Manufacturers of Theta-axis Actuator

Manufacturer profiles associated with Theta-axis Actuator.

Sourcing Theta-axis Actuator from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What is the typical application of a theta-axis actuator?

It is used in placement heads of automated assembly machines to rotate electronic components, chips, or small parts to the correct angular orientation before placement onto substrates or circuit boards.

What are the key performance parameters to verify?

Rated torque, rotation angle, position repeatability, axial and radial load capacities, operating pressure, supply voltage, current consumption, temperature range, protection class, and weight. Always confirm these with the manufacturer for your specific model.

How is the actuator controlled?

It receives digital commands from a motion controller, which drives a servo or stepper motor with encoder feedback for closed-loop control, achieving precise angular positioning.

What maintenance signals indicate potential issues?

Unusual noise, vibration, or increased positioning error may indicate wear or misalignment. Check for leaks in pneumatic lines, encoder faults, or motor overheating. Follow manufacturer guidelines for maintenance.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Buyer enquiry

Request manufacturing insight for Theta-axis Actuator

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes: Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here: We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman: CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim: A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

pressure:	0 to 10 bar
other spec:	Angular accuracy: ±0.1°, Max torque: 50 Nm, Speed range: 0-120 rpm
temperature:	-10°C to +60°C

Theta-axis Actuator

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards