ABB IRB 6700 Axis Motors: IRB6700 3HAC055439-004 / 3HAC055437-004

Technical Dossier

Product Details And Specifications

ABB IRB 6700 Series: Comprehensive Module Range and Technical Overview

The ABB IRB 6700 is a heavy-duty industrial robot platform engineered for high-payload applications in automotive body-in-white assembly, foundry operations, material handling, and process industries including petrochemical plants, steel mills, and offshore fabrication facilities. With payload ratings spanning 150 kg to 300 kg and reach configurations from 2.6 m to 3.2 m, the IRB 6700 family represents ABB's seventh-generation large-robot architecture. Its axis drive system relies on a series of dedicated rotary AC servo motors — each assigned to a specific joint axis — that are field-replaceable line-replaceable units (LRUs). The motors covered on this page, including 3HAC055437-004 and 3HAC055439-004, are OEM-specified components for Axis 1–6 configurations across multiple IRB 6700 variants. These units are installed across tens of thousands of robot cells globally and remain in active production and aftermarket supply chains as of 2026.

The Evolution of IRB 6700 Architecture

ABB's large-robot lineage traces from the IRB 6400 (introduced in the 1990s) through the IRB 6600 and IRB 6650S, culminating in the IRB 6700 platform launched in 2013. Each generation introduced incremental improvements in axis motor efficiency, encoder resolution, and mechanical stiffness. The IRB 6700 adopted a True Move and QuickMove motion control architecture paired with IRC5 controller integration, requiring axis motors with specific resolver or encoder feedback protocols compatible with the DSQC series drive boards.

The 3HAC0xxxxx part number series replaced the earlier 3HAC0xxxxx-001 and -002 suffix variants, with the -004 suffix denoting the current production revision incorporating updated winding insulation class (Class H) and revised bearing preload specifications for extended MTBF in continuous-duty cycles. Compatibility with IRC5 single-cabinet and IRC5 panel-mounted controllers is maintained across all -00x suffix revisions, though firmware alignment with RobotWare 6.x and 7.x must be verified prior to installation.

IRB 6700 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components within the ABB IRB 6700 axis motor and associated drive ecosystem. Each entry reflects a distinct functional role within the robot's kinematic chain or control architecture.

3HAC055437-004: Axis 1/2 rotary AC servo motor, IRB 6700-200/2.6 & 150/3.2 variants
3HAC055439-004: Axis 3 rotary AC servo motor, IRB 6700 series, high-torque configuration
3HAC055438-004: Axis 2 rotary AC servo motor, IRB 6700-245/3.0 variant
3HAC055440-004: Axis 4 rotary AC servo motor, IRB 6700 wrist assembly
3HAC055441-004: Axis 5 rotary AC servo motor, IRB 6700 wrist pitch
3HAC055442-004: Axis 6 rotary AC servo motor, IRB 6700 wrist roll
3HAC026253-001: Axis 1 gearbox unit, IRB 6700, cast iron housing
3HAC044168-001: Axis 2 gearbox, IRB 6700-200/2.6, RV-type reducer
3HAC044169-001: Axis 3 gearbox, IRB 6700, harmonic drive compatible
3HAC057540-001: Motor cable harness, Axis 1–3, IRB 6700 base section
3HAC057541-001: Motor cable harness, Axis 4–6, IRB 6700 upper arm
3HAC046686-001: Resolver feedback unit, Axis 1, IRB 6700 series
3HAC046687-001: Resolver feedback unit, Axis 2–3, IRB 6700 series
3HAC025562-001: Brake release unit, multi-axis, IRB 6700 controller interface
3HAC047136-001: Axis computer board (DSQC1000), IRC5 controller, IRB 6700 compatible
3HAC050363-001: Drive unit, Axis 1–3, IRC5 drive module for IRB 6700
3HAC050364-001: Drive unit, Axis 4–6, IRC5 drive module for IRB 6700
3HAC044075-001: Balancing device spring assembly, IRB 6700-200/2.6
3HAC052982-001: SMB (Serial Measurement Board), IRB 6700, resolver signal processing

Sourcing Hard-to-Find & Obsolete IRB 6700 Parts

The IRB 6700 platform entered its mature lifecycle phase post-2020. While ABB continues to manufacture current-revision components, earlier suffix variants (-001, -002, -003) of axis motors such as 3HAC055437 and 3HAC055439 are no longer produced and must be sourced from certified aftermarket channels. DriveKNMS maintains a dedicated inventory buffer for IRB 6700 axis motors, gearbox assemblies, and resolver units, with stock sourced from decommissioned robot cells, OEM overstock, and controlled-environment warehousing. All units are catalogued by part number, suffix revision, and physical condition grade (Grade A: unused surplus; Grade B: tested pull; Grade C: refurbished to OEM spec). Lead times for in-stock units are typically 1–3 business days ex-warehouse. For obsolete or low-volume SKUs, DriveKNMS operates a global sourcing network across EU, North America, and Asia-Pacific industrial surplus markets.

Quality Control for the IRB 6700 Range

IRB 6700 axis motors present specific test challenges due to their integrated resolver feedback systems and high-inertia winding configurations. DriveKNMS applies the following verification protocol to all IRB 6700 motor units prior to dispatch:

1. Winding resistance check: Phase-to-phase and phase-to-ground resistance measured against OEM tolerance bands (typically ±5% of nominal).
2. Insulation resistance test: 500 VDC megohmmeter test; minimum 100 MΩ acceptance threshold.
3. Resolver signal verification: Sine/cosine output amplitude and phase offset validated against IRC5 drive board input specifications.
4. Bearing inspection: Axial and radial play measured; units exceeding OEM clearance limits are rejected or remanufactured.
5. Brake function test: Holding torque verified under static load; release voltage confirmed within 24 VDC nominal range.
6. Thermal imaging: Post-run thermal scan to identify winding hotspots or bearing friction anomalies.
All test records are retained and available upon request with each shipment.