ABB 3HAC042494-006 AC Servo Motor – IRB 6700 Series

ABB 3HAC042494-006 Rotary AC Servo Motor with Integrated Pinion — Axis Drive Architecture for IRB 6700 Heavy-Payload Robots

The ABB 3HAC042494-006 is the OEM-specified rotary AC servo motor with an integrated pinion gear, engineered exclusively for the ABB IRB 6700 robot family. This unit serves as the primary electromechanical actuator for Axis 1 and Axis 2 drive trains, converting inverter-generated torque commands from the IRC5 or OmniCore drive module into precise angular displacement at the joint gearbox input shaft. Its role in the control loop is deterministic: the motor’s resolver or encoder feedback closes the position loop at the drive level, while the integrated pinion eliminates the mechanical compliance that a separate coupling or adapter flange would introduce. In high-cycle automotive and heavy fabrication environments, this mechanical rigidity directly translates to sustained path accuracy over millions of operating cycles.

The IRB 6700 platform covers payload ratings from 150 kg to 300 kg across reach variants of 2.6 m to 3.2 m. Across all these configurations, ABB standardized on the 3HAC042494-006 as the common axis drive unit for the lower-axis joints, simplifying spare-parts inventory for multi-robot installations. The part supersedes earlier production numbers 3HAC028889-001 and 3HAC028068-001 with identical mounting dimensions and electrical interfaces, enabling direct drop-in replacement without mechanical rework or IRC5 parameter re-mapping.

Real-time Stock & RFQ: [email protected] | WhatsApp: +86 18359268345

Technical Parameters

Hardware Logical Analysis

The 3HAC042494-006 integrates three functional subsystems into a single sealed assembly: the AC servo winding stack, the feedback transducer, and the output pinion. This integration is not cosmetic — it eliminates the tolerance stack-up that accumulates when a separate motor, coupling, and pinion are assembled in the field. ABB machines the pinion tooth profile to match the IRB 6700 gearbox ring gear with a defined backlash specification, typically held below 0.05° at the joint output. Over the service life of the robot, this controlled backlash budget is a primary contributor to the IRB 6700’s rated path repeatability of ±0.05 mm.

From an EMC standpoint, the motor housing is a continuous metallic enclosure bonded to the robot arm structure, providing a low-impedance return path for common-mode currents induced by the PWM drive output. ABB’s IRC5 drive module operates at a switching frequency in the range of 4–8 kHz; without proper shielding continuity at the motor body, these switching transients would couple into the resolver signal lines and degrade position feedback accuracy. The integrated design ensures the shield termination at the motor connector is mechanically constrained and cannot be compromised by field assembly errors.

The resolver-based feedback variant of this motor provides absolute position within one electrical cycle and incremental counting across multiple turns, giving the IRC5 axis computer a full multi-turn absolute position reference at power-up without requiring a homing sequence. This is architecturally significant for heavy-payload robots: a 300 kg IRB 6700 cannot safely execute a homing sweep in a confined cell, so the absolute feedback eliminates that operational constraint entirely.

Thermal management relies on the motor’s Class F winding insulation combined with the thermal mass of the robot arm casting to which the motor is bolted. ABB’s motor thermal model, running inside the IRC5 axis computer, tracks estimated winding temperature in real time and issues a warning (event log code 50024) before the hardware thermal cutout activates. This predictive thermal supervision prevents unplanned stops in production cells.

System Integration Benefits

• Zero-remap replacement: Connector pinout, encoder protocol, and motor parameter set are identical to the factory-installed unit. The IRC5 or OmniCore controller requires no drive parameter changes after swap.
• Backlash-controlled pinion mesh: OEM-machined tooth geometry maintains the gearbox input backlash within ABB’s specification, preserving the robot’s rated path repeatability of ±0.05 mm without post-installation calibration of the gear mesh.
• Absolute multi-turn feedback: Resolver or absolute encoder eliminates homing sequences at power-up, reducing cell restart time after an E-stop or power loss event — critical in 24/7 automotive production environments.
• Predictive thermal supervision: The IRC5 motor thermal model tracks winding temperature in real time, issuing advance warnings (event 50024) before hardware cutout, enabling planned maintenance windows instead of unplanned downtime.
• IP54 sealed enclosure: Dust and splash protection sustains reliable operation in foundry extraction, press-shop coolant mist, and wash-down adjacent environments without additional motor protection measures.
• Class F insulation margin: 155 °C rated windings provide a thermal headroom buffer above the motor’s continuous operating temperature, extending mean time between failures in high-ambient installations.
• EMC shielding continuity: Metallic housing bonded to the robot arm structure provides a defined common-mode current return path, preventing PWM switching noise from coupling into resolver signal lines and degrading position loop stability.
• Cross-variant compatibility: A single part number covers all six IRB 6700 payload/reach variants, reducing the number of unique spare-part SKUs a maintenance team must stock for a mixed-model robot fleet.
• Serial-number traceability: Each unit carries an ABB serial number readable by RobotStudio and the IRC5 service log, enabling full maintenance history tracking and warranty claim processing through ABB’s myABB portal.
• Supersession transparency: 3HAC042494-006 is the current production number replacing 3HAC028889-001 and 3HAC028068-001 with no mechanical or electrical changes, eliminating cross-reference ambiguity during procurement.

Quality Assurance & Global Logistics

Every 3HAC042494-006 unit offered through siemensplc.com is sourced from ABB’s authorized distribution network or verified surplus channels. Prior to listing, each unit undergoes a structured inspection protocol: visual examination of the motor housing and pinion for mechanical damage, label and serial-number authentication against ABB’s part numbering conventions, and anti-static packaging with desiccant to maintain storage integrity during transit. Units that cannot be authenticated to OEM origin are not offered for sale under any circumstances.

Logistics operations are based in Xiamen, China, a major southeastern port city with direct access to international air freight hubs at Xiamen Gaoqi International Airport and sea freight connections through Xiamen Port. Standard international shipments are dispatched within 1–3 business days of order confirmation. Express air freight options (DHL, FedEx, UPS) are available for urgent requirements, with typical transit times of 3–5 business days to Europe, North America, and Southeast Asia. All shipments include tracking numbers and commercial invoices with accurate HS code declarations to facilitate customs clearance. For large-volume orders or project-based procurement, consolidated sea freight arrangements can be coordinated on request.

The 12-month warranty covers manufacturing defects and OEM authenticity. Warranty claims are processed directly through our Xiamen operations team, with replacement units dispatched upon receipt and inspection of the returned part.

Contact Information

Email: [email protected]
WhatsApp: +86 18359268345
Web: siemensplc.com
Location: Xiamen, China
© 2026 siemensplc.com. All rights reserved.