ABB 3HAC0977-1

¥3,259.00

The ABB 3HAC0977-1 is a critical Mechanical Unit Gearbox, a core mechanical drive component specifically designed for ABB’s industrial robot arms, such as those in the IRB 6600 or IRB 7600 series. This unit, the ABB 3HAC0977-1, functions as the precision reduction gearbox for a specific robot axis (e.g., Axis 2 or Axis 3), translating the high-speed, low-torque rotation of the servo motor into the low-speed, high-torque movement required for the robot arm. Its primary role is to provide the mechanical interface, strength, and precision necessary for accurate and reliable robot positioning and motion under load. The robust design and manufacturing quality of the ABB 3HAC0977-1 are fundamental to the robot’s repeatability, payload capacity, and long-term durability.

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Description

Product Description

The ABB 3HAC0977-1 is a critical Mechanical Unit Gearbox, a core mechanical drive component specifically designed for ABB’s industrial robot arms, such as those in the IRB 6600 or IRB 7600 series. This unit, the ABB 3HAC0977-1, functions as the precision reduction gearbox for a specific robot axis (e.g., Axis 2 or Axis 3), translating the high-speed, low-torque rotation of the servo motor into the low-speed, high-torque movement required for the robot arm. Its primary role is to provide the mechanical interface, strength, and precision necessary for accurate and reliable robot positioning and motion under load. The robust design and manufacturing quality of the ABB 3HAC0977-1 are fundamental to the robot’s repeatability, payload capacity, and long-term durability.

Product Parameters

The technical specifications for the ABB 3HAC0977-1 gearbox are defined by its mechanical performance:

  • Component Type: Robot Axis Gearbox (Mechanical Unit).

  • Compatibility: Designed for a specific ABB robot model (e.g., IRB 6600-175/2.55) and a specific axis (e.g., Axis 2). It is not interchangeable between robot models or axes.

  • Gear Ratio: Fixed, high-ratio reduction (e.g., 120:1 or similar) to provide the necessary torque multiplication.

  • Output Torque Rating: Rated for a maximum continuous and peak output torque, which directly relates to the robot’s payload capacity for that axis.

  • Backlash: Extremely low backlash specification (typically measured in arc-minutes) to ensure high positional accuracy and repeatability.

  • Lubrication: Pre-filled with a specific type and quantity of high-performance grease (e.g., Mobilith SHC 100) for long service intervals.

  • Sealing: Integrated seals to retain grease and exclude contaminants like dust and moisture from the industrial environment.

  • Mounting Interfaces: Precision machined interfaces for mounting to the robot arm structure and for connecting the input servo motor and the output arm linkage.

  • Weight: Significant mass, as it is a substantial cast and machined component.

Advantages and Features

The ABB 3HAC0977-1 mechanical unit offers key advantages for robotic performance:

  • High Precision and Stiffness: The ABB 3HAC0977-1 is manufactured to exacting tolerances, providing the stiffness and minimal backlash required for the robot to achieve its specified repeatability (e.g., ±0.05 mm) even under full load.

  • Exceptional Durability and Life: Engineered for millions of cycles, the gearbox uses high-quality bearings and gear geometry to withstand continuous, high-duty cycle operation in demanding production environments.

  • Optimized for Robot Dynamics: The gear ratio and inertia are matched to the specific robot arm’s kinematics and the paired servo motor, ensuring optimal dynamic performance and control stability.

  • Integrated Design: As a genuine ABB component, it guarantees perfect mechanical fit, alignment, and performance with the rest of the robot arm, motor, and feedback system.

  • Maintains Original Performance: Replacing a worn gearbox with the genuine 3HAC0977-1 restores the robot to its original factory specifications for accuracy, speed, and payload.

Application Cases in Industry

This gearbox is used inside industrial robots performing heavy-duty tasks:

  • Automotive Body Shop (Spot Welding): The ABB 3HAC0977-1 gearbox in an IRB 7600 robot provides the robust torque needed to maneuver a heavy welding gun accurately and repeatedly along vehicle body seams for thousands of cycles per day.

  • Material Handling (Palletizing): In an IRB 6600 palletizing robot, this gearbox enables the powerful and precise movements required to lift heavy bags or boxes and place them accurately on a pallet.

  • Machine Tending: Provides the strength and precision for a robot to consistently load and unload heavy castings or parts from a CNC machine or press.

  • Die Casting: Withstands the harsh environment and heavy loads involved in extracting parts from die casting machines.

  • General Heavy-Payload Assembly: Used in robots performing assembly tasks that require both high force and high precision.

Comparisons with Competing Products

When compared to third-party rebuilt gearboxes or attempting a repair, the ABB 3HAC0977-1 represents the benchmark for quality and reliability:

  • OEM Precision vs. Rebuilt Unit: A new ABB 3HAC0977-1 gearbox meets all original factory specifications for backlash, stiffness, and surface finish. A rebuilt unit may have increased backlash and reduced stiffness due to wear on non-replaceable components, compromising robot accuracy.

  • Guaranteed Compatibility and Performance: The genuine unit ensures perfect gear mesh with the mating motor pinion and arm linkage. A mismatched or out-of-spec third-party gearbox can cause premature wear, noise, and eventual failure of the entire mechanical train.

  • Sealing and Lubrication Integrity: New units come with factory-fresh, correct seals and the exact type/amount of grease. Rebuilds risk improper sealing or grease, leading to early contamination or lubrication failure.

  • Warranty and Support: A new 3HAC0977-1 carries a full ABB warranty and is supported by ABB’s global service network. Rebuilt units typically have limited warranties and may not be supported by OEM service engineers.

Selection Suggestions and Precautions

Replacement is a major service operation requiring expertise:

  1. Absolute Robot Model and Axis Identification: You must know the exact robot model (from the nameplate) and the axis number (1-6) from which the gearbox is removed. The ABB 3HAC0977-1 is unique to its specific application.

  2. Professional Service Recommended: Replacement involves disassembling a major section of the robot arm, handling heavy components, and requires precise alignment procedures, special tools (torque wrenches, dial indicators), and calibration software. It is strongly advised to have ABB service personnel or highly trained robot technicians perform this task.

  3. Calibration is Mandatory: After installing the new 3HAC0977-1 gearbox, the robot must undergo a full calibration procedure using ABB’s calibration tools (e.g., Pendulum or CalibWare) to update the axis resolver offsets. Operating the robot without calibration will result in dangerous and inaccurate movement.

  4. Check Motor and Feedback Unit: Before installation, inspect the mating servo motor’s pinion gear and the resolver/encoder feedback unit for wear or damage. It is often recommended to replace these as a set with the gearbox.

  5. Follow Greasing and Sealing Instructions: If the unit is not pre-greased, use only the ABB-specified grease type and quantity. Ensure all seals are correctly seated during assembly to prevent leaks.

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