Wrist Assembly for Robotic Arms | Industrial Component Directory

Product Specifications

Technical details and manufacturing context for Wrist Assembly

Definition

The wrist assembly is a critical component of a robotic arm system that connects the forearm to the end-effector. It typically consists of multiple joints and actuators that allow for pitch, yaw, and roll movements, providing the dexterity needed for complex manipulation tasks in industrial automation, assembly, welding, and material handling applications. The assembly is designed to handle a rated load capacity of 5–50 kg at full speed, with a rotation range of ±180° and a bending range of ±90°. Repeatability is ±0.05 mm at rated load and speed, per ISO 9283. Maximum rotation speed is 180–360 °/s, with higher speeds reducing load capacity. Operating temperature range is -10–60 °C, below -10 °C seals may stiffen. Protection class is IP54–IP65 per IEC 60529, with IP65 for washdown environments. Input voltage is 24 V DC ±10% for servo motors and sensors. The standard material is aluminum alloy 6061-T6 per ASTM B221, with optional stainless steel. Weight ranges from 2–15 kg depending on size and options. The wrist assembly is available in various configurations to suit different robotic applications. It is important to verify model-specific values and standards with the legal manufacturer or supplier before procurement.

Working Principle

The wrist assembly operates through a combination of mechanical joints (such as revolute or spherical joints) driven by electric motors, hydraulic actuators, or pneumatic systems. Control signals from the robot's controller precisely coordinate the movement of each joint to achieve the desired orientation of the end-effector in three-dimensional space. The joints are supported by precision bearings to ensure smooth and accurate motion. The assembly's performance is influenced by load, speed, and environmental conditions. Regular maintenance includes checking for wear on bearings and seals, and ensuring proper lubrication. Failure modes may include joint stiffness, loss of precision, or complete joint failure, often indicated by unusual noises or increased backlash. It is essential to follow the manufacturer's guidelines for operation and maintenance to ensure reliable performance.

Common Materials

Aluminum alloy, Steel, Precision bearings

Technical Parameters

Parameter	Typical range	Notes & selection driver
Rated Load Capacity	5–50 kg	Maximum end-effector weight at full speed
Rotation Range	±180 °	Continuous rotation available on request
Bending Range	±90 °	Angular movement for orientation
Repeatability	±0.05 mm	At rated load and speedISO 9283
Maximum Rotation Speed	180–360 °/s	Higher speed reduces load capacity
Operating Temperature	-10–60 °C	Below -10°C seals may stiffen
Protection Class	IP54–IP65	IP65 for washdown environmentsIEC 60529
Input Voltage	24 ±10% V DC	For servo motors and sensors
Material	6061-T6	Aluminum alloy; optional stainless steelASTM B221
Weight	2–15 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

Wrist Housing Part
Structural enclosure that protects internal components and provides mounting points

Material: Aluminum alloy
Rotary Actuators
Motors or cylinders that provide rotational force to each joint

Material: Steel/Copper windings
Reduction Gearbox
Gear system that increases torque and precision of rotational movements

Material: Hardened steel
Position Sensors
Encoders or resolvers that provide feedback on joint angles and positions

Material: Electronic components/Plastic housing
Precision Bearings
Carry each joint so it turns smoothly and holds its accuracy under load.
Seals
Keep lubricant in and contamination out of the wrist joints.

Applied To / Applications

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

Robotic Arm

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Robotic Arm Assembly

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Robotic Palletizing Arm

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Manufacturers of Wrist Assembly

Manufacturer profiles associated with Wrist Assembly.

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Frequently Asked Questions

What is the rated load capacity of the wrist assembly?

The rated load capacity is 5–50 kg at full speed. However, higher speeds reduce load capacity, so the actual allowable load depends on the operating speed and specific configuration. Always verify the exact capacity for your application with the manufacturer.

What are the rotation and bending ranges?

The rotation range is ±180° (continuous rotation available on request), and the bending range is ±90°. These ranges allow for precise orientation of the end-effector in three-dimensional space.

What is the repeatability of the wrist assembly?

Repeatability is ±0.05 mm at rated load and speed, tested according to ISO 9283. This indicates the assembly's ability to return to a commanded position consistently.

What protection class does the wrist assembly have?

The protection class is IP54–IP65 per IEC 60529. IP65 is suitable for washdown environments. The level of protection depends on the specific model and options chosen.

Data Basis

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

Preliminary Technical Classification

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pressure:	0 to 10 bar
other spec:	Max angular velocity: 180°/s, Max torque: 50 Nm, IP rating: IP67
temperature:	-20°C to 80°C

Wrist Assembly

Product Specifications

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Frequently Asked Questions

What is the rated load capacity of the wrist assembly?

What are the rotation and bending ranges?

What is the repeatability of the wrist assembly?

What protection class does the wrist assembly have?

Data Basis

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