ABB 3HAC020988-008 – Rotary AC Servo Motor with Pinion | IRB 7600 Platform
Engineering Background
The ABB IRB 7600 is one of ABB’s flagship heavy-duty industrial robots, engineered for high-payload applications including spot welding, material handling, press tending, and foundry operations. The axis drive motors are mission-critical components that directly determine positioning accuracy, repeatability, and cycle-time performance.
Product Positioning
The ABB 3HAC020988-008 is the OEM-specified rotary AC servo motor with integrated pinion gear, designed for axis drive on the IRB 7600 robot family. It is cross-referenced under part numbers 3HAC046685-002, 3HAC11440-1, and 3HAC033203-001, covering multiple production revisions and regional BOM variants. Konmask.com supplies this component as a verified replacement for maintenance, overhaul, and spare-parts inventory programs.
Complete Technical Specifications
- Primary Part Number: 3HAC020988-008
- Cross-Reference / Alternate P/N: 3HAC046685-002 | 3HAC11440-1 | 3HAC033203-001
- Manufacturer: ABB Robotics
- Compatible Platform: IRB 7600 Series (all variants)
- Motor Type: Rotary AC Servo Motor with Pinion (Rot AC Motor)
- Drive Interface: Integrated pinion gear for direct axis coupling
- Weight: Approx. 600 g
- Origin: OEM / ABB Robotics supply chain
- Condition: New / Refurbished (specify at inquiry)
- Warranty: 12 months from date of shipment
Proven Application Environments
- Automotive body-in-white spot welding lines (IRB 7600-500/2.55, 7600-340/2.8)
- Heavy press tending and die casting extraction
- Foundry and high-temperature material handling cells
- Palletizing and depalletizing systems with payloads up to 500 kg
- Aerospace structural assembly and riveting fixtures
- Offshore and marine heavy-component manipulation
Engineering Advantages
- OEM-Matched Performance: Identical torque curve, encoder resolution, and thermal rating as factory-installed units — no recalibration of robot parameters required.
- Integrated Pinion Design: Pre-assembled pinion eliminates field alignment errors and reduces MTTR (Mean Time To Repair) significantly versus separate motor + gear installations.
- Multi-Revision Compatibility: Covers 3HAC020988-008, 3HAC046685-002, 3HAC11440-1, and 3HAC033203-001 — a single SKU resolves multiple BOM line items across IRB 7600 production generations.
- Thermal Stability: Rated for continuous duty in high-ambient foundry and press environments.
- Drop-In Replacement: Plug-and-play with ABB IRC5 and S4C+ controller platforms without firmware modification.
System Architecture & Signal Flow
The 3HAC020988-008 motor interfaces directly with the ABB Drive Unit / Axis Computer (DSQC) via the robot’s internal motor cable harness. The resolver or encoder feedback signal is routed to the Measurement Board (DSQC 377/378), which closes the position loop through the IRC5 Main Computer (DSQC 639). The integrated pinion transmits torque to the axis gearbox, driving the robot joint through the mechanical transmission chain. Replacement of this motor does not require modification of the robot’s motion configuration parameters when using an OEM-matched unit.
Sourcing & Quality Verification
- Source Traceability: All units sourced from ABB-authorized distributors or decommissioned OEM production lines with full chain-of-custody documentation.
- Incoming Inspection: Each unit undergoes visual inspection, connector integrity check, and rotation/resistance verification prior to dispatch.
- Packaging: Anti-static foam-lined carton with moisture-barrier bag; pinion gear protected with transit cap.
- Documentation: Certificate of conformity and test record available upon request.
- Export Compliance: HS Code 8501.52 — AC motors, multi-phase, output > 750W. Export documentation provided for international shipments.
Procurement Process
- Confirm Part Number: Verify your robot’s axis number and cross-reference against 3HAC020988-008, 3HAC046685-002, 3HAC11440-1, or 3HAC033203-001 in your ABB spare parts manual.
- Submit Inquiry: Contact support@konmask.com with your robot serial number, axis number, and required quantity for a formal quotation.
- Lead Time: In-stock units ship within 2 business days. Special-order or refurbished units: 7–15 business days.
- Payment & Shipping: T/T, PayPal, and trade-term (FOB/CIF) options available. DHL Express, FedEx, and sea freight supported.
- After-Sales Support: Technical installation guidance provided via email or video call. 12-month warranty with RMA process.
Technical FAQ
Q: Is 3HAC020988-008 compatible with both IRC5 and S4C+ controllers?
A: Yes. The motor’s electrical interface is compatible with both ABB IRC5 and S4C+ controller generations used on the IRB 7600 platform.
Q: Do I need to re-tune the robot after replacing this motor?
A: When replacing with an OEM-matched 3HAC020988-008 unit, no re-tuning of motor parameters is required. Standard ABB commissioning procedures (revolution counter update) apply.
Q: What is the difference between 3HAC020988-008 and 3HAC046685-002?
A: These are revision-level cross-references for the same functional component. 3HAC046685-002 is a later BOM revision; both are mechanically and electrically interchangeable on the IRB 7600 platform.
Q: Can you supply a refurbished unit with warranty?
A: Yes. Refurbished units are available with a 12-month warranty and full test documentation. Please specify “refurbished” in your inquiry.
Q: What is the typical failure mode for this motor?
A: Common failure modes include encoder/resolver degradation (causing position errors or E-stop faults), winding insulation breakdown (overcurrent faults), and pinion gear wear in high-cycle applications. Early replacement at first fault code is recommended to prevent secondary gearbox damage.
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