▶ 3D Assembly Mode
Animated part-by-part build — every extrusion, bearing and fastener, in order
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Torso Assembly

Robot's Chest and Upper body. The first part of your Dropbear that exists in the real world.

free120 min79 parts
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Inventory & tools check

48 parts · overview
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Lay out all 15 printed parts, your exal link bundle, M3 bolts, your 3mm hex driver, a torque wrench (if you have one), and Loctite 243. Confirm visually that no print is cracked or warped at the bearing seats.

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Actuators

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RMD-X10-40 Actuator (X10 V3, 1:7)48 V, CAN, 40 N·m peak / 15 rated — shoulder pitch×2$625

Electronics

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XT30 Female Connector30 A rated×2$0.8
XT30 Power Splitter1-to-2 splitter×1$2.5
Silicone Wire14 AWG, 1 m×1$3

Extrusions

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2020 Aluminium Extrusion, 100 mm20 × 20 mm, slot 6×6$1.2
2020 Aluminium Extrusion, 150 mm20 × 20 mm, slot 6×8$1.8
2020 Aluminium Extrusion, 200 mm20 × 20 mm, slot 6×10$2.4
2020 Aluminium Extrusion, 300 mm20 × 20 mm, slot 6×1$3.6
2020 Aluminium Extrusion, 350 mm20 × 20 mm, slot 6×1$4.2

Fasteners

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Allen Socket Head M4 × 16 MM×45$0.05
Allen Socket Head M4 × 45 MM×4$0.08
Allen Socket Head M4 × 25 MM×4$0.06
Allen Socket Head M4 × 80 MM×2$0.12
Allen Socket Head M4 × 10 MM×1$0.05
Allen Socket Head M4 × 20 MM×18$0.05
Allen Countersunk M4 × 16 MM×86$0.05
Plain Hex Nuts M4×5$0.05
Extruded T-Nuts M4 (slot 6)×155$0.15

Power

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High-drain battery pack, 44–48 V ≈1 kWh≥ 60 A continuous: 12S LiPo 22 Ah 25C, or 13S Li-ion ≥ 20 Ah with a 60 A BMS×1$700
BMS 13S 60 A (DIY Li-ion pack only)Balancing, NTC temp; not needed with a smart LiPo×1$35
48 V Smart Charger54.6 V output, 10 A×1$55
Emergency Stop Button22 mm, NC, panel mount×1$8
Fuse Holder + 40 A Blade FuseInline, 12–48 V×2$5
Voltage Display Module48 V range, 3-wire×1$5

Printing

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PLA+ Filament, 1.75 mm, 1 kg spool385 printed parts; CAD solid mass 14.8 kg; ~12 kg at structural settings incl. supports and reprints×12$20

Printed parts

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6band
6band
back-bottom-strap-spine
back-bottom-strap-spine
back-middle-strap
back-middle-strap
back-top
back-top
base_link
battery-monitor-holder
button-holder
dumbattery
dumleftarm
dumrightarm
dumwaist
front-left-shoulder
front-right-shoulder
handle
handle
head-power-supply-bracket
killswitch
killswitch-spine-interface
left-battery-mount
left-front-rib-lower
left-lower-rib-side
left-middle-rib
lumbar-strap
naval-strap
neck-chest-interface2
power_converter
rear-left-rib
rear-left-spine-support
rear-left-spine-support_mir
rear-right-rib
rear-right-shoulder
rear-right-shoulder_mir
right-battery-mount
right-front-rib-lower
right-lower-rib-side
right-middle-rib
right-rear-shoulder
right-rear-shoulder_mir
right-shoulder-motor-adapter
right-shoulder-motor-adapter_mir
right-shoulder-top
right-shoulder-top1
right-shoulder-under
right-shoulder-under1
voltage-meter
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