ABB IRB6700 Series Motors & Modules: 3HAC051321-001 / 3HAC043072-001 / 3HAC046186-001

Technical Dossier

Product Details And Specifications

ABB IRB6700 Series Technical Notes

The ABB IRB6700 is a heavy-duty industrial robot platform deployed across global heavy industry sectors including automotive body-in-white assembly, chemical plant material handling, nuclear facility maintenance robotics, and refinery process automation. With a payload range from 150 kg to 300 kg and a reach envelope of 2.6 m to 3.2 m, the IRB6700 family represents ABB's flagship sixth-generation large-robot architecture. Its modular drive and motor design enables field-level component replacement without full arm disassembly, making spare parts availability a critical operational factor for plant maintenance teams worldwide.

The IRB6700 platform succeeded the IRB6640 and IRB6650S lines, inheriting their mechanical footprint while introducing a redesigned motor controller interface, updated axis computer architecture, and improved IP67-rated joint sealing. Units in this series are installed in tens of thousands of production cells globally, with a service life expectation exceeding 15 years under standard duty cycles.

The Evolution of IRB6700 Architecture

The IRB6700 was introduced in 2013 as a direct replacement for the IRB6640 series. Its architecture is built around the IRC5 controller platform, using the DSQC series drive modules and the 3HAC-prefixed motor and mechanical unit part numbering system. Early production units (2013–2016) used first-generation axis computer boards (DSQC1000) and motor feedback encoders with 17-bit resolution. From 2017 onward, ABB transitioned to 23-bit multi-turn encoders on axis 1–3 motors, improving positioning repeatability to ±0.05 mm.

IRB6700 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components within the ABB IRB6700 mechanical and drive ecosystem. Each entry reflects a distinct functional role within the robot's axis drive train or control architecture.

3HAC051321-001: Axis 1 drive motor unit, IRB6700-300 variant, 3-phase AC servo, flange-mount.
3HAC043072-001: Axis 2 motor assembly, IRB6700 standard frame, includes resolver harness.
3HAC046186-001: Axis 3 motor unit, IRB6700-300/2.7, reinforced bracket configuration.
3HAC025338-001: Axis 4 motor, compact AC servo, compatible with IRB6700-205 and IRB6700-235.
3HAC025339-001: Axis 5 motor assembly, wrist module, IRB6700 standard series.
3HAC025340-001: Axis 6 wrist motor, high-speed output, IRB6700 all variants.
3HAC029157-001: Balancing cylinder unit, axis 2 counterbalance, nitrogen-charged.
3HAC044168-001: Gearbox, axis 1, IRB6700-300, ratio 1:105, grease-lubricated.
3HAC044169-001: Gearbox, axis 2, IRB6700 standard, integrated output flange.
3HAC044170-001: Gearbox, axis 3, IRB6700-300 variant, aluminium housing.
3HAC026253-001: Motor cable harness, axes 1–3, 7 m standard length, M23 connector.
3HAC026254-001: Motor cable harness, axes 4–6, 7 m, shielded, drag-chain rated.
3HAC031683-001: Axis computer board, IRC5 platform, DSQC1000 generation, axes 1–3 control.
3HAC031684-001: Axis computer board, IRC5, DSQC1000, axes 4–6 control.
3HAC044512-001: Encoder feedback unit, 23-bit multi-turn, axis 1–3, post-2017 production.
3HAC044513-001: Encoder feedback unit, 23-bit multi-turn, axis 4–6, post-2017 production.
3HAC025337-001: Brake release unit, axis 1–3, 24 VDC, DIN rail mount, IRC5 compatible.
3HAC046187-001: Upper arm assembly, IRB6700-300, includes axis 4 motor mount.
3HAC051322-001: Lower arm, IRB6700-300/2.7, cast aluminium, pre-drilled cable routing.

Quality Control for the IRB6700 Range

IRB6700 motors and gearbox units undergo a structured test protocol prior to dispatch. AC servo motors are bench-tested under no-load and rated-load conditions using an ABB-compatible drive emulator, verifying phase resistance balance (tolerance ±2%), insulation resistance (minimum 100 MΩ at 500 VDC), and encoder signal integrity across the full 360° rotation range. Gearbox units are inspected for backlash within ABB's published tolerance band and pressure-tested for seal integrity at 0.5 bar.