ABB IRB6700 Axis Reducer Modules: 3HAC055445-001 3HAC045066-001 3HAC037474-001 3HAC051323-001

Technical Dossier

Product Details And Specifications

ABB IRB6700 Series: Comprehensive Axis Reducer Range and Technical Overview

The ABB IRB6700 is a heavy-duty industrial robot platform deployed across global process industries including automotive body-in-white assembly, chemical plant material handling, nuclear facility maintenance operations, and petroleum refinery equipment servicing. With payload capacities ranging from 150 kg to 300 kg and reach variants from 2.6 m to 3.2 m, the IRB6700 family represents ABB Robotics' flagship sixth-generation large-robot architecture. Axis reducers — also referred to as gearboxes or joint drives — are the highest-wear mechanical subassemblies in this platform, with scheduled replacement intervals typically between 20,000 and 40,000 operating hours depending on duty cycle and lubrication maintenance compliance. Sourcing genuine or verified-equivalent reducer assemblies is a critical path item for any facility operating IRB6700 units in continuous production.

The Evolution of IRB6700 Architecture

The IRB6700 was introduced in 2013 as the successor to the IRB6640 and IRB6650 platforms, consolidating multiple payload/reach variants under a unified mechanical architecture. The primary design objective was a 15% reduction in total cost of ownership versus the IRB6640, achieved through extended service intervals, a simplified wrist design, and standardized axis reducer interfaces across the model range.

Early production units (2013–2016) used first-generation reducer assemblies with a specific lubrication port configuration. From 2017 onward, ABB revised several axis reducer part numbers — including the Axis 1, 2, and 3 gearboxes — to incorporate updated seal materials and revised bearing preload specifications. This revision introduced the current-generation part numbers including 3HAC055445-001 and 3HAC045066-001. Facilities operating pre-2017 IRB6700 units must verify serial number ranges before ordering replacement reducers, as cross-generation compatibility requires mechanical verification.

The IRB760 platform shares a partial mechanical lineage with the IRB6700 and uses the 3HAC037474-001 reducer assembly at specific joint positions, making cross-platform parts management relevant for facilities operating mixed fleets. The IRB6700 200/150 and 245/30 variants use the 3HAC051323-001 assembly at Axis 3, which is specific to the higher-payload configuration and is not interchangeable with standard IRB6700/150 units.

IRB6700 Full Catalog & Functionalities (SKU List)

The following part numbers represent the verified reducer and mechanical drive assemblies for the ABB IRB6700 and related platforms. Each entry reflects a distinct mechanical specification and installation position.

3HAC055445-001: IRB6700 Axis 1 gearbox assembly, revised seal specification, 2017+ production
3HAC045066-001: IRB6700 Axis 2 reducer unit, standard payload variants, flange-mount interface
3HAC037474-001: IRB760 joint reducer, compatible with select IRB6700 wrist configurations
3HAC051323-001: IRB6700 200/150 and 245/30 Axis 3 gearbox, high-payload specific
3HAC026510-001: IRB6700 Axis 4 wrist gearbox, all payload variants
3HAC026511-001: IRB6700 Axis 5 wrist reducer, standard configuration
3HAC026512-001: IRB6700 Axis 6 wrist gearbox, tool flange interface
3HAC040549-001: IRB6700 Axis 1 motor adapter plate and drive coupling assembly
3HAC044168-001: IRB6700 Axis 2 motor bracket and coupling unit
3HAC052664-001: IRB6700/300 Axis 1 gearbox, 300 kg payload variant specific
3HAC052665-001: IRB6700/300 Axis 2 reducer, 300 kg payload variant specific
3HAC028357-001: IRB6700 lower arm assembly with integrated Axis 2/3 reducer interfaces
3HAC025338-001: IRB6700 upper arm mechanical unit, Axis 4 gearbox pre-installed
3HAC044169-001: IRB6700 balancing device assembly, spring-loaded counterbalance unit
3HAC026513-001: IRB6700 Axis 3 gearbox, standard payload (150 kg) configuration
3HAC040550-001: IRB6700 Axis 3 motor and gearbox interface bracket
3HAC052666-001: IRB6700/235 Axis 2 reducer, 235 kg payload variant
3HAC055446-001: IRB6700 Axis 1 gearbox, 150 kg variant, updated 2019 revision

Sourcing Hard-to-Find & Obsolete IRB6700 Parts

The IRB6700 platform entered volume production in 2013 and remains in active manufacture as of 2026, but early-production reducer assemblies with original part numbers are no longer available through standard ABB distribution channels. DriveKNMS maintains a dedicated inventory of both current-production and superseded IRB6700 mechanical assemblies sourced through verified industrial surplus, controlled decommissioning programs, and direct manufacturer channels.

For facilities operating IRB6700 units under long-term maintenance contracts where OEM support has been reduced or discontinued for specific sub-variants, DriveKNMS provides lifecycle extension support including: cross-reference verification between superseded and current part numbers, inspection and functional testing of surplus reducer assemblies prior to shipment, and documentation packages for maintenance record compliance. All parts are supplied with traceable documentation and, where applicable, original ABB packaging or equivalent protective shipping configuration.

Quality Control for the IRB6700 Range

Axis reducer assemblies for the IRB6700 platform require specialized verification procedures due to the precision of the harmonic drive and planetary gear interfaces used across Axis 1 through Axis 6. DriveKNMS applies the following test protocol to all IRB6700 reducer units prior to dispatch:

Dimensional inspection of all mounting flanges and shaft interfaces against ABB mechanical drawings. Backlash measurement at input and output shafts using calibrated dial indicators, with acceptance criteria referenced to ABB service manual tolerances. Lubrication port integrity check and pre-fill with ABB-specified grease type (Shell Gadus S2 V220 2 or equivalent per axis specification). Seal condition assessment under static pressure to verify no ingress path exists. Functional rotation test across full angular range with torque monitoring where test equipment permits. Visual inspection of bearing races and gear tooth surfaces under magnification for pitting, spalling, or fretting corrosion.

Units that do not meet dimensional and functional acceptance criteria are quarantined and not offered for sale. Test records are retained and available upon request for quality-critical procurement processes.