Wheeled-base (half-body) humanoids are the fastest-moving form factor of the humanoid race: over 40% of humanoid products launched globally in 2025 use wheeled chassis, with travel speed 3-5x that of bipeds, 60%+ energy savings, and system cost one order of magnitude lower. Based on public sources and vendor research, this article dissects the chassis and lift designs of leading players (Galbot, AgiBot, UBTECH, Pudu, Astribot, Yifei, Zhipingfang, Topstar) across mecanum, omni-wheel, four-steer-four-drive and dual-differential chassis and screw / rigid-chain / belt lifting mechanisms; maps the supplier landscape (SEER, WIMAI, SLAMTEC, JIECANG and more); and answers the core question — in-house or outsourced? The answer: chassis and lift mechanisms are overwhelmingly developed in-house; outsourcing concentrates on commodity parts like wheels, motors and screws.
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Shuanglin (300100) SL-LJM03 . Full-stack in-house R&D for linear joint modules and core components. 63 core components deployed across 13 customers. Precision drive technology for humanoid robot mass production.
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Shuanglin (300100) SL-LJM02 . Full-stack in-house R&D for linear joint modules and core components. 63 core components deployed across 13 customers. Precision drive technology for humanoid robot mass production.
Shuanglin (300100) SL-LJM01 . Full-stack in-house R&D for linear joint modules and core components. 63 core components deployed across 13 customers. Precision drive technology for humanoid robot mass production.
Debi Power DB-LA02 . Integrated high power-density motor + precision reducer + intelligent servo drive. For humanoid robots, quadruped robots, and smart equipment.
Debi Power DB-LA01 . Integrated high power-density motor + precision reducer + intelligent servo drive. For humanoid robots, quadruped robots, and smart equipment.
Lead screw linear slide 140 mm, NEMA 17 mount, FrelonGold GST carriage, 2 mm lead anti-backlash nut.
12 mm x 1 mm lead stainless lead screw, 254 mm long, precision-rolled 300 series stainless with PTFE coating and triangular anti-backlash nut; lead accuracy 0.003 in/ft.
Lead Screw with a Triangular Anti-Backlash Nut featuring a 10mm diameter, 1mm lead, and a length of 254mm, made from precision-rolled 300 Series Stainless Steel and coated with PTFE to prevent flaking. The Triangular Constant Force™ Anti-Backlash nut uses a spring to maintain uniform radial pressure, reducing backlash by 2-4 times over its lifespan.
☑️Many diameters and leads ☑️Standard lead screw thread types: acme & trapezoidal ☑️Custom screws for your stepper motor linear actuator - Quote!
Haydon Kerk Pittman (AMETEK, USA) can-stack linear actuators span Ø15-37 mm in six series (15000/Z20000/G4 19000/Z26000/G4 25000/G4 37000) with 3-100 µm travel per step, 7-260 N max force and strokes of 12.7-38.1 mm captive or up to 150 mm non-captive/external; captive, non-captive and external-drive screw formats suit optical focusing, microfluidic pumps and small robot end effectors.
Haydon Kerk Pittman (AMETEK, USA) Size 17 Slim is a NEMA-17 hybrid linear actuator with integrated IDEA intelligent drive: 1.8° step angle, 2.6 A/phase, 13.2 W, 352 g total, 12-42 VDC supply and 0.003-0.0487 mm travel per step across lead options; the drive-integrated design cuts wiring and commissioning for optical focusing, micro-pumping and compact Z-axis precision positioning.
Haydon Kerk Pittman (AMETEK, USA) Kerk lead screws span 2-24 mm (5/64-15/16 in) diameters with leads of 0.3-92 mm, pairable with ZBX/ZBA/ZBM/KHD/WDG/NTB/VHD/BFW anti-backlash and self-lubricating nuts up to 2,224 N (500 lbf) dynamic load; maintenance-free engineered-plastic nuts run quiet and are widely used in medical devices, optics, 3D printing and precision linear drives as a low-cost small linear-joint solution.
Haydon Kerk Pittman (AMETEK) can-stack linear stepper actuators use a low-cost can-stack stepper driving a lead screw for compact, cost-effective linear motion in Captive and Non-Captive/External forms. Diameters span 15–36 mm (0.59–1.4 in), 6–100 µm travel per step, 3–260 N max force, 12.7–38.1 mm captive stroke and up to 150 mm non-captive/external stroke, suited to instrumentation, valve control and space-constrained automation.
Haydon Kerk Pittman (AMETEK) hybrid stepper linear actuators convert hybrid stepper rotation into linear motion via a stainless-steel precision modified ACME lead screw / direct-drive rotor nut, in Captive, Non-Captive and External configurations. Range spans Size 6–Size 34 (16–87 mm frame), 1.5–127 µm travel per step, 2–2224 N max force, 12.7–63.5 mm captive stroke and up to 400–500 mm non-captive/external stroke, for medical, semiconductor and lab-automation precision positioning.
FAULHABER (Germany) linear actuators convert coreless DC / brushless rotary motion into linear travel via precision lead or recirculating ball screw nuts: 06L (6 mm dia, 3-25 N continuous axial force), 08L (8 mm, 4-40 N) and 10L (10 mm, 5-200 N; high-load HL version 100-200 N), with reduction ratios 4-1024; trapezoidal lead screw and ball screw nut options (ball version for higher speed/efficiency), custom stroke and length, paired with 0308-1028 DC/BL micro motors (up to 90,000 r/min) and planetary/spur gearheads (i 4-4096, zero-backlash versions), used in robotics, laboratory automation, medical and optical positioning.
HIWIN Super S series are high-speed quiet ballscrews with Dm-N up to 220,000, 5-7 dB lower running noise and 18-32% less space/weight; the FSC standard type covers Ø14-25 shafts with 8-20 mm leads, e.g. 20-8K5 at Ca 2960 kgf / C0a 6505 kgf / axial stiffness K 58 kgf/μm and 25-15K5 at Ca 1980 kgf / C0a 5730 kgf, series-wide Ca 920-2960 kgf and stiffness 24-63 kgf/μm, targeting humanoid robot linear joints, semiconductor equipment and high-speed precision drives.
Hengli ball screw assemblies span BHSK/KHSK heavy-load, BRP/BRS external-circulation, DWP/DWS internal-circulation and KRP end-cap series; shaft 16-140 mm, lead 4-80 mm, accuracy C0-C10, DN up to 160,000, for robotics, machine tools and injection molding linear drives.
