HITBOT Z-Arm S Series Cobots

From Compact Automation to 20 kg Payloads

The five S Series cobots cover a surprisingly broad range of robot sizes and capabilities. At the compact end, the S622 carries 3 kg over a 622 mm working radius and weighs about 15 kg. The S922 extends this to 5 kg and 922 mm while remaining relatively compact at approximately 22 kg. Both are rated at ±0.02 mm repeatability.

The range then becomes more interesting. The S1034 increases payload substantially to 16 kg despite having a reach of only 1,034 mm. By comparison, the S1400 stretches much farther to 1,400 mm but has a lower 10 kg payload, making these two models useful for quite different requirements. Finally, the S1854 sits at the top of the range with a 20 kg payload, 1,854 mm working radius and typical TCP speed of 2 m/s.

Applications and Programming

HITBOT positions its six-axis robots for a broad collection of industrial and automation tasks. Its own material lists applications including assembly, pick and place, screwdriving, dispensing, handling and welding, while its broader industrial material also covers machine tending, packaging, palletizing and inspection. The robots are promoted across industries including electronics, automotive, food and beverage, laboratory/research and education.

The S Series also provides several options for creating and integrating applications. HITBOT's six-axis control software is browser-based and supports drag teaching and trajectory teaching, allowing users to guide the robot through desired positions and paths. It also provides graphical and command-based configuration, modular programming elements, tool-coordinate settings and collision protection.

For more customised systems, HITBOT specifies I/O, TCP/IP, Modbus TCP/RTU and Profinet communication, together with development support for C#, C++, Python, Java and ROS. This makes the series suitable not only for straightforward standalone tasks but also for systems where the robot needs to communicate with machinery, tooling, sensors or a broader automation setup.

Comparing the HITBOT S Series Models

The main differences between the five models are payload, reach, physical size, repeatability and, for the S1854, TCP speed. 

Model: Z-Arm S622
Payload: 3 kg | Reach: 622 mm | Robot Weight: ≈15 kg | Repeatability: ±0.02 mm | Typical TCP Speed: 1 m/s | Footprint: Ø128 mm
Practical fit: Compact, lighter-duty applications such as small-part handling, assembly, screwdriving, dispensing and other tasks where a long reach or high payload is unnecessary.

Model: Z-Arm S922
Payload: 5 kg | Reach: 922 mm | Robot Weight: ≈22 kg | Repeatability: ±0.02 mm | Typical TCP Speed: 1 m/s | Footprint: Ø149 mm
Practical fit: General-purpose light automation requiring more workspace and payload than the S622 while retaining the same published repeatability.

Model: Z-Arm S1034
Payload: 16 kg | Reach: 1,034 mm | Robot Weight: ≈40 kg | Repeatability: ±0.03 mm | Typical TCP Speed: 1 m/s | Footprint: Ø190 mm
Practical fit: Higher-payload applications where carrying capacity is more important than having the longest possible reach, including heavier handling, machine tending and related automation.

Model: Z-Arm S1400
Payload: 10 kg | Reach: 1,400 mm | Robot Weight: ≈40 kg | Repeatability: ±0.05 mm | Typical TCP Speed: 1 m/s | Footprint: Ø190 mm
Practical fit: Applications that need substantially more reach while remaining within a moderate 10 kg payload range.

Model: Z-Arm S1854
Payload: 20 kg | Reach: 1,854 mm | Robot Weight: ≈85 kg | Repeatability: ±0.1 mm | Typical TCP Speed: 2 m/s | Footprint: Ø240 mm
Practical fit: The heaviest and longest-reaching tasks within the S Series, where the priority is a large workspace and payload capacity rather than the tighter repeatability of the smaller models.