Boston Dynamics has revealed a new four-fingered mechanical hand for its Atlas humanoid robot, designed specifically for industrial production and complex laboratory applications. The hand relies on reinforcement learning techniques for a seamless transition from virtual simulation to field work in automotive plants.
- Unveiling the new mechanical hand and innovative design
- Reasons for consciously omitting the fifth finger and pinky
- Using real industrial tools and changing drill bits
- Direct drive motors and virtual simulation techniques
- Field training in Hyundai’s giant automotive plants
- Frequently asked questions
Unveiling the new mechanical hand and innovative design
On Thursday, October 1, 2026, Boston Dynamics, a company specializing in smart machinery, showcased a new and innovative generation of robotic hands designed for its famous humanoid robot, “Atlas.” The modern mechanical hand features only four fingers, completely omitting the pinky finger, and provides 13 integrated degrees of freedom that allow for complex manual maneuvers. The company explained that this engineering design was specifically created to meet the demands of large-scale industrial production and training across virtual simulation environments whose direct results are transferred to the real world in what is technically known as “sim-to-real reinforcement learning.”
This qualitative upgrade comes as a pivotal and strategic step within the company’s efforts to deploy the Atlas robot in assembly lines and automotive plants belonging to its parent company, Hyundai Motor Group. The robot’s previous mechanical hand was limited to only 7 degrees of freedom, and its primary goal was grasping and holding objects without the ability to adjust their position; meanwhile, the new hand is designed with the ability to move, rotate, and flexibly adjust the angles of objects after picking them up. The Verge published a video showing Atlas using its new hands to remarkably change an electric drill bit.
Reasons for consciously omitting the fifth finger and pinky
Engineering officials at the company confirmed that eliminating the fifth finger was a deliberate and carefully considered design decision to balance priorities. Press reports quoted Dylan Thrush, a mechanical engineer on the Atlas team, as saying: “The decision to drop the pinky came after the engineering team concluded that the additional dexterity and limited tasks its presence might provide do not justify the design complexity resulting from adding three more degrees of freedom, along with the subsequent increase in weight, electrical power consumption, and hand size.”
To verify this hypothesis practically, Zachary Jackowski, head of products and technology at the company, asked engineers to tape their pinky and ring fingers together with adhesive tape for a full day on their own hands to document activities they were unable to perform. Alberto Rodriguez, director of robot behavior for the Atlas project, explained that the result proved that sacrificing full simulation of the human form in favor of mechanical durability allows the use of larger, more powerful, and longer-lasting electric motors.
Using real industrial tools and changing drill bits
The thumb in the new hand has the ability to slide and maneuver along the length and width of each of the other three fingers. The hand can perform precise pinching movements using the thumb with any finger, carry tools and equipment via an ultra-tight three-point grip, and operate electrical and mechanical tools equipped with power buttons and push switches such as drills, sanders, nail guns, and industrial welding torches. The hand can also manage and rotate objects held between its fingers flexibly and self-reposition them upon sensing the start of a slip thanks to precision sensors.
Direct drive motors and virtual simulation techniques
The hand relies on a standardized model of integrated electric motors that drive each joint directly and independently, with enclosed outer casings to completely isolate the motors. This prevents any exposed cables or wires that could be damaged or rubbed during joint movement. A dense network of digital pressure sensors covers the fingertips and the entire palm. The hand is similar in overall size to an adult human hand while matching the old hand in tensile strength and grip force.
The design was crafted to allow easy and precise modeling in virtual software, enabling artificial intelligence algorithms to be trained by changing motor torque parameters, surface friction levels, and virtual object shapes. These programming skills are then transferred directly to the physical robot relying exclusively on feedback generated from the joint motors.
Field training in Hyundai’s giant automotive plants
The announcement of this advanced hand comes just one week after Boston Dynamics opened its advanced Robot Factory Applications Center in the U.S. state of Georgia—an industrial training facility dedicated to accelerating the integration of the Atlas robot and qualifying it for actual collaborative work in modern automotive plants belonging to the Hyundai group.
Frequently asked questions
Question: Why did Boston Dynamics omit the pinky finger in the new Atlas hand?
Answer: To reduce mechanical complexity and lower power consumption and weight in favor of using larger, more powerful, and industrially durable motors.
Question: What tools and equipment can the robot use with the new hand?
Answer: The robot can handle tools with buttons and push switches such as drills and electric welding equipment, and rotate objects within its grip.
Question: Where will the Atlas robot be practically operated and tested in the next phase?
Answer: It is being trained and qualified to work on production lines belonging to Hyundai Motor Company, starting from the training center in the state of Georgia.
