ABB 3HAC055450-004 Axis 2 Motor with Pinion for IRB 6700

Product Condition	New original or used original. Please confirm the condition with us before ordering.
Shipping	Ships from Shanghai, China. Typical delivery lead time is 3-5 working days after order confirmation, via DHL / FedEx / UPS. The unit has a net weight of 27.5 kg, so it is packed with protective film in a reinforced carton and the freight is quoted against the packed weight. Actual lead time depends on the specific condition and stock status confirmed with us.
Buyer Benefits	Genuine ABB 3HAC055450-004 rotary AC motor with pinion — ABB spare-part name "Rot. ac motor incl p.", axis 2 of the IRB 6700. This variant is valid for the IRB 6700 variants 235/2.65, 205/2.80, 175/3.05, 150/3.20, 200/2.60 and 155/2.85 — the same variant group ABB groups together for the axis-2 motor in the IRB 6700 product manual. Larger 300/2.70 and 245/3.00 variants take a different article. This article sits alongside 3HAC055450-003 in the same series. The two are distinguished by robot variant and finish, and listings describe this one as the ABB orange version. Send us your robot serial number and we confirm which of the two your machine takes. Supplied with the pinion already mounted on the motor shaft, as one matched ABB assembly for the axis-2 gearbox. Each unit is inspected and tested (encoder signal, insulation resistance) before packing, with full order tracking from Shanghai.
Item Location	Shanghai, China
Payment	We accept PayPal, T/T (bank transfer), and Alibaba Trade Assurance.

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Description

Axis 2 Rotary AC Motor with Pinion for ABB IRB 6700 Manipulators

Specifications

Part Number	3HAC055450-004
Brand	ABB
ABB Spare-Part Name	Rot. ac motor incl p. — rotary AC motor including pinion
Category	Rotary AC servo motor with pre-mounted pinion — manipulator axis-2 drive
Definition	An ABB rotary AC servo motor supplied with the pinion already mounted on the motor shaft, delivered as one assembly for the axis-2 drive of the ABB IRB 6700 manipulator.
Function	Drives axis 2 — the lower-arm swing joint — of the IRB 6700. Working with the controller and the axis-2 drive unit, it converts electrical input into controlled joint rotation while the built-in feedback device reports rotor position back for closed-loop control.
Axis	Axis 2 — the lower-arm joint. ABB's IRB 6700 product manual states that when the holding brake of this motor is released, the lower arm becomes movable and may fall, so the arm must be secured before the motor is removed.
Robot Compatibility	We confirm the robot compatibility for your unit before supply — send us the part number and the machine it came from.
Series Variant	This article sits alongside 3HAC055450-003 in the same series. Both are axis-2 motors with pinion for the IRB 6700, and the two are separated by robot variant and finish rather than by axis. They are not interchangeable — the distinction has to be resolved before ordering.
Finish / Protection Configuration	Listings describe this variant as the ABB orange version, with 3HAC055450-003 as the white version. The IRB 6700 is offered in Standard and Foundry Plus protection configurations, and ABB's product manual lists the axis-2 motor among the joints affected by Foundry Plus. Confirm the configuration of your robot before ordering.
Motor Type A / B	ABB's IRB 6700 product manual has an identification table that maps installed motors to type A or type B by article number, and states that those numbers identify the installed motor and cannot be used for ordering spare parts. Spare-part numbers come from the separate spare-parts manual.
Assembly	Motor and pinion supplied as one matched assembly. ABB's replacement procedure requires the motor pinion to be mated correctly to the gear of the gearbox during installation.
Installation	Axis-2 joint of the IRB 6700 manipulator, meshing with the axis-2 gearbox
Handling Weight	Product net weight 27.5 kg. The ABB IRB 6700 product manual states that the axis-2 motor weighs 28 kg and that all lifting accessories must be sized accordingly.
Net Weight	27.5 kg
Dimensions	346 mm (depth / length) x 178 mm (height) x 178 mm (width). Note the 346 mm depth — the 3HAC055450-003 variant is listed at 341 mm.
Rated Output / Torque	We confirm the rated output / torque for your unit before supply — send us the part number and the machine it came from.
Electrical Ratings	We confirm the electrical ratings for your unit before supply — send us the part number and the machine it came from.
Customs Tariff Number	Classified for your destination at quotation — send us your part number and we confirm the HS code on the invoice.
Country of Origin	Stated on the commercial invoice. Send us your part number and we confirm the origin for your shipment.
Condition	New original or used original. Please confirm the condition with us before ordering.

Industrial Applications

Heavy-payload material handling on IRB 6700 cells — transferring large castings, forgings and steel parts between stations.
Spot welding and large-body assembly in automotive body shops, where axis 2 carries the highest static load of any joint in the cycle.
Machine tending — loading and unloading CNC machining centres, presses and injection moulding machines.
Palletizing and depalletizing of heavy packaged goods at end-of-line.
Foundry and die-cast part transfer under high-duty-cycle conditions, including robots in the Foundry Plus protection configuration.
Scheduled axis-2 motor renewal during major overhaul, or replacement after an axis-2 drive fault, brake fault or feedback fault.

Design Purpose

Axis 2 is the joint that swings the lower arm of the robot forward and back, carrying the weight of the upper arm, wrist, tool and payload at the longest lever arm in the machine. That makes it the highest-torque joint on the manipulator, which is why ABB supplies its motor as a dedicated article with the pinion already mounted on the shaft: the pinion is the interface into the axis-2 gearbox, and delivering it as part of the assembly removes a press-fit step from the field replacement.

The reason there are two articles in the 3HAC055450 series is the IRB 6700 itself. The family was released with the 235/2.65, 205/2.80, 175/3.05 and 150/3.20 variants and later extended with 200/2.60 and 155/2.85, then with the larger 300/2.70 and 245/3.00 machines. ABB's product manual groups the axis-2 motors accordingly, and the article numbers follow those groups. What this means for a buyer is that "axis-2 motor for an IRB 6700" is not one part: the variant group, and the finish or protection configuration that goes with it, decide which of the two numbers applies. This is also why the two variants carry different listed depths — 346 mm here against 341 mm on 3HAC055450-003 — rather than being the same motor under two labels.

Before you order and before you install

Resolve the -003 / -004 question first: both articles are axis-2 motors with pinion for the IRB 6700, and they are not interchangeable. Send us your robot serial number, the variant and the finish of the installed motor, and we confirm which one your machine takes.
Confirm the variant: listings mark this article as valid for IRB 6700 235/2.65, 205/2.80, 175/3.05, 150/3.20, 200/2.60 and 155/2.85. The 300/2.70 and 245/3.00 variants take a different article.
Confirm the protection configuration: Standard and Foundry Plus robots take different motor articles at axis 2. Check the robot designation on the nameplate or in System Info on the FlexPendant.
Secure the lower arm before releasing the brake: ABB warns that when the holding brake of the axis-2 motor is released, the lower arm becomes movable and may fall. De-energize and lock out the robot, then support the arm mechanically.
Size the lifting gear for 28 kg: ABB states the axis-2 motor weighs 28 kg and that all lifting accessories must be sized accordingly. Use the specified motor lifting accessory.
Use guide pins in pairs, and the correct removal tool: ABB specifies guide pins fitted in opposite holes and removal tools used in pairs, with the tool size depending on motor type A or B. Excessive force when parting or mating the motor and gearbox can damage the gears.
Mate the pinion correctly: the motor pinion must be properly meshed with the gear of the gearbox, and the cable exit must face the correct way.
Foundry Plus units: if the motor is a new spare part on a Foundry Plus robot, the evacuation-hole protection filter must be replaced with the transparent plug / sight glass enclosed with the spare part before the motor goes into service.
Leak-down test and calibration afterwards: perform the leak-down test per the product manual, then verify the axis-2 position reference and repeatability before returning the robot to production.
Qualified personnel: axis-2 motor replacement is manipulator service work that must follow the applicable ABB robot product manual.

Common Failure Modes

Overcurrent or overheat tripping — the drive unit reports motor overload after sustained heavy-duty cycles at axis 2.
Feedback-device fault — loss of position feedback, giving axis-2 position drift or a fault during homing.
Holding-brake failure — the lower arm sags or drops when the servo is switched off.
Gearbox oil entering the motor — primary sealing between the gearbox and the motor fails. This is the failure mode the type B motor flange evacuation is designed to reveal.
Abnormal noise or vibration from axis 2 — worn pinion teeth, bearing damage, or contamination inside the motor.
Insulation degradation or ground fault — the axis-2 drive trips as soon as the motor is enabled.
Wrong variant fitted — the -003 and -004 articles in this series were treated as the same part, or the robot's protection configuration was not checked.

Alarm codes for this unit are shown on the controller display. Send us the fault code and we confirm the diagnosis and the matching spare part.

Why Choose Us

Specialized in industrial robot spare parts for ABB, FANUC, KUKA and YASKAWA.
Variant separation before quotation: we check whether your IRB 6700 takes 3HAC055450-004 or 3HAC055450-003, so the motor that arrives matches the variant and configuration actually installed.
We confirm the payload variant and the Standard / Foundry Plus configuration against your serial number, rather than ordering on "axis-2 motor for IRB 6700".
Each unit is inspected and tested (encoder signal, insulation resistance) before packing, with secure industrial packaging and full order tracking from Shanghai.
We flag the articles that look alike but are not interchangeable, so a near-miss on the article number does not turn into a returned 27.5 kg motor.
Quote-based service — send your inquiry with the robot model, serial number, axis and the marking on your existing unit for a matched offer.

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