ABB 3HAC024782-001 Rot AC Motor Incl Pinion

Technical Dossier

Product Details And Specifications

ABB IRB6620 Series Technical Notes

The mechanical and electrical subsystems of the IRB6620 are built around ABB's S4C+ and IRC5 controller ecosystems. Axis motors, gearboxes, balancing units, and cable harnesses are all series-specific and not interchangeable with adjacent robot families such as the IRB6640 or IRB6650 without engineering validation. This makes sourcing genuine OEM replacement parts — particularly for end-of-life units — a critical operational requirement for maintenance teams.

The Evolution of IRB6620 Architecture

The IRB6620 was introduced as part of ABB's sixth-generation large-robot platform, succeeding the IRB6400 and IRB6600 lineages. The original IRB6620 (150/2.2 variant) launched with S4C+ controller compatibility, using resolver-based feedback on all six axes. Subsequent revisions introduced IRC5 controller compatibility, transitioning axis motor feedback to absolute encoders — a change that affects motor replacement compatibility between early and late production units.

Key architectural milestones include: the transition from Fanuc-sourced gearbox components to ABB-proprietary gearbox assemblies on axes 1–3; the introduction of integrated brake resistor modules within the drive cabinet; and the revision of the axis-1 motor mounting interface (HAC024782 series) to accommodate higher continuous torque ratings. Units manufactured before 2008 may require adapter kits when retrofitting with current-production motor assemblies. The IRB6620 entered the mature/end-of-support phase for new installations circa 2018, with ABB's extended lifecycle support program covering critical spare parts through 2028 under the ABB Ability™ Asset Suite framework.

IRB6620 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components within the ABB IRB6620 spare parts ecosystem, classified by functional category. Each part number corresponds to a discrete assembly or sub-assembly used in standard IRB6620 configurations.

Axis Motors & Drive Components

• 3HAC024782-001: Rot AC Motor Incl Pinion — Axis motor assembly for IRB6620, includes integrated pinion gear for gearbox interface, resolver feedback variant.
• 3HAC026253-001: AC Servo Motor Axis 1 — Primary rotation axis drive motor, high-torque continuous duty rating, IRC5 compatible.
• 3HAC026254-001: AC Servo Motor Axis 2 — Lower arm drive motor assembly, includes encoder and brake unit.
• 3HAC026255-001: AC Servo Motor Axis 3 — Upper arm drive motor, matched to ABB gearbox unit 3HAC028357-001.
• 3HAC026256-001: AC Servo Motor Axis 4 — Wrist rotation motor, compact frame, integrated resolver.
• 3HAC026257-001: AC Servo Motor Axis 5 — Wrist bend motor assembly, IP67 rated for foundry environments.
• 3HAC026258-001: AC Servo Motor Axis 6 — Tool flange rotation motor, high-speed low-torque configuration.

Gearbox & Mechanical Transmission

• 3HAC028357-001: Gearbox Axis 1 — Primary swing axis gearbox, grease-lubricated, rated for 150 kg payload class.
• 3HAC028358-001: Gearbox Axis 2 — Lower arm gearbox assembly, includes output flange and sealing kit.
• 3HAC028359-001: Gearbox Axis 3 — Upper arm gearbox, compatible with IRB6620 and IRB6620LX variants.
• 3HAC028360-001: Gearbox Axis 4 — Wrist gearbox unit, pre-filled with Optimol Longtime PD2 grease.

Controller & Drive Electronics

• 3HAC025338-001: Drive Unit IRC5 — Axis drive module for IRC5 cabinet, controls axes 1–3, regenerative braking capable.
• 3HAC025339-001: Drive Unit IRC5 — Axis drive module for IRC5 cabinet, controls axes 4–6.
• 3HAC026512-001: Main Computer Unit IRC5 — Central processing board, runs RobotWare OS, CompactFlash storage.
• 3HAC025917-001: I/O Module 24VDC — Digital I/O expansion board, 16 inputs / 16 outputs, DeviceNet compatible.

Balancing & Structural

• 3HAC028880-001: Balancing Device — Mechanical spring balancing unit for axis 2, reduces motor load during vertical motion cycles.
• 3HAC029157-001: Cable Harness Axis 1–3 — Internal signal and power cable assembly, upper arm routing, 2.2 m reach configuration.
• 3HAC029158-001: Cable Harness Axis 4–6 — Wrist cable assembly, includes brake and resolver wiring, IP67 sleeving.

Quality Control for the IRB6620 Range

IRB6620 components present specific quality control challenges due to the integration of mechanical and electronic subsystems within single assemblies. DriveKNMS applies the following test protocols to all IRB6620 spare parts prior to dispatch: