ABB 3HAC057551-003 Motor with Pinion for IRB 6600 Axis 2

Axis 2 Servo Motor with Pinion — Technical Overview

Specifications

Industrial Applications

• Automotive spot welding and body-shop lines where IRB 6600 robots carry heavy welding guns and tooling.
• Heavy-payload material handling and machine tending — loading and unloading large parts, castings, and steel workpieces.
• Palletizing and depalletizing of heavy packaged goods at end-of-line.
• Press tending, die handling, and large-part assembly in foundry and metal-forming cells.
• General heavy-duty automation cells built on the ABB IRB 6600 platform.

Design Purpose

The axis-2 motor converts electrical energy from the drive unit into controlled rotation of the robot’s lower arm. The integrated pinion meshes directly with the axis-2 gearbox to transmit torque to the lower arm, while the built-in resolver/encoder feeds back precise rotor position to the IRC5 controller. On the IRB 6600, axis 2 carries most of the robot’s vertical load during lifting motions, so the motor and pinion are matched at the factory to keep backlash within tolerance and ensure repeatable positioning under load.

Common Failure Modes

• Overcurrent or overheat tripping — the drive unit reports motor overload after heavy lifting cycles.
• Encoder / resolver feedback loss — axis 2 shows position drift or alarms during homing.
• Holding brake failure — the lower arm sags or drops immediately when the servo is switched off.
• Abnormal noise or vibration from axis 2 — typically caused by worn pinion teeth, bearing damage, or contamination inside the motor.
• Insulation degradation or ground fault — the axis-2 drive trips the moment the motor is enabled.

Why Choose Us

• Focused ABB robot spare-parts supplier covering servo motors, drive units, gearboxes, and teach pendants for IRB-series robots.
• Each axis motor is inspected and tested (encoder signal, insulation resistance) before packing.
• Cross-reference support — if your unit was originally shipped under 3HAC021030-001 or 3HAC020208-001, we confirm compatibility against your robot serial number.
• 12-month warranty with remote technical support for installation and commissioning questions.
• Multiple payment methods accepted — PayPal, T/T, and Alibaba Trade Assurance.

Related Products

• ABB IRB 6600 axis 1, 3, 4, 5, and 6 servo motors
• ABB IRB 6600 axis gearboxes
• ABB robot servo drive units (DSQC series)
• ABB robot pinions and replacement gears
• ABB teach pendants and IRC5 controller accessories