简体中文 | English | 日本語 | français | Español
| Date | Version | File Name | Changelog |
|---|---|---|---|
| 2026-03-31 | v1.0 | reBot_B601_DM_v1.0_20260331.step | Initial upload |
| 2026-04-25 | v1.1 | reBot_B601_DM_v1.1_20260425.step | Added Cable Restraint for the 3 end joint motors to prevent loosening and disconnection. Fixed Joint 1 model from 4310 to 4340P. Added CNC part 02_Base_Reinforcement_Part.step at the bottom to enhance base rigidity. |
This BOM is for the reBot Arm B601 DM robotic arm, which uses Damiao 43 series motors. The other version, reBot Arm B601 RS, uses RobStride motors; see the BOM here.
- 3D_Printed_Parts/: Step files for all 3D printed parts.
- Metal_Parts/: Step files for all CNC machined metal parts.
- Purchased_Parts/: Step files for all purchased components.
- reBot_B601_DM_v1.1_20260415.step: Full robotic arm assembly file.
- We offer five kit options:
- Arm Body Motor Kit: Includes only motors and wiring harnesses for the robotic arm.
- Arm Body Structural Kit: Includes only mechanical structural components.
- Gripper Complete Kit: Includes motors, wiring harnesses and structural components for the gripper.
- Full Kit: Includes the complete set of the robotic arm body and gripper.
- Pre‑assembled Robotic Arm: Fully assembled finished robotic arm.
Warning
Declaration: The published BOM does not represent the final shipping version from Seeed. This open-source v1.1 is optimized for developers to reproduce at minimal cost, with some non-essential details simplified. The final Seeed production version will include metal laser engraving for foolproofing, some 3D printed parts will be replaced with metal for durability, clearances and machining tolerances will be adjusted for factory variation (balancing precision and cost), and custom wiring (e.g., braided sleeve protection) will be added at extra cost. However, the mechanical structure remains identical.
| Part Description | Image | File Name | Material | Qty | Notes |
|---|---|---|---|---|---|
| Robotic Arm Base Platform |  |
01_BASE_Plate.step | Bambu ABS Black | 1 | 0.4 nozzle, 0.2 layer height, 30% infill |
| Robotic Arm Base Link |  |
01_BASE_Link.step | Bambu ABS Black | 1 | 0.4 nozzle, 0.2 layer height, 30% infill |
| Upper Arm Left Filler |  |
01_Upper_Arm_Fuller_L.step | Bambu PLA Black & Green | 1 | 0.4 nozzle, 0.2 layer height, 15% infill |
| Upper Arm Right Filler |  |
01_Upper_Arm_Fuller_R.step | Bambu PLA Black & Green | 1 | 0.4 nozzle, 0.2 layer height, 15% infill |
| Upper Arm Center Filler |  |
01_Upper_Arm_Fuller_M.step | Bambu ABS Black | 1 | 0.4 nozzle, 0.2 layer height, 30% infill |
| Upper Arm Horizontal Limit Block |  |
01_Upper_Arm_Limit.step | Bambu ABS Black | 1 | 0.4 nozzle, 0.2 layer height, 30% infill |
| Arm Handle |  |
01_Arm_Handle.step | Bambu ABS Black | 1 | 0.4 nozzle, 0.2 layer height, 30% infill |
| Lower Arm Left Filler |  |
01_Lower_Arm_Filler_L.step | Bambu PLA Black & Green | 1 | 0.4 nozzle, 0.2 layer height, 15% infill |
| Lower Arm Right Filler |  |
01_Lower_Arm_Filler_R.step | Bambu PLA Black & Green | 1 | 0.4 nozzle, 0.2 layer height, 15% infill |
| Lower Arm Center Filler |  |
01_Lower_Arm_Filler_M.step | Bambu ABS Black | 1 | 0.4 nozzle, 0.2 layer height, 30% infill |
| Upper Arm Cover |  |
01_Upper_Arm_Cover.step | Bambu PLA Green | 1 | 0.4 nozzle, 0.2 layer height, 15% infill |
| Lower Arm Cover |  |
01_Lower_Arm_Cover.step | Bambu PLA Green | 1 | 0.4 nozzle, 0.2 layer height, 15% infill |
| Motor 5 Protection Cover |  |
01_Motor_Cover.step | Bambu ABS Black | 1 | 0.4 nozzle, 0.2 layer height, 30% infill |
| Gripper Horizontal Limit |  |
01_Lower_Arm_Limit.step | Bambu PLA Green | 1 | 0.4 nozzle, 0.2 layer height, 15% infill |
| Gripper Slider Support Bracket |  |
01-Rail-Bracket.step | Bambu PLA Green | 1 | 0.4 nozzle, 0.2 layer height, 15% infill |
| Gripper Finger |  |
01_Finger.step | Bambu ABS Black | 2 | 0.4 nozzle, 0.2 layer height, 45% infill |
| Motor 5 Cable Restraint |  |
01_Joint5_Cable Restraint_A.step | Bambu PLA Green | 1 | 0.4 nozzle, 0.2 layer height, 15% infill |
| Motor 6 & 7 Cable Restraint A |  |
01_Joint6_7_Cable Restraint_A.step | Bambu ABS Black | 2 | 0.4 nozzle, 0.2 layer height, 30% infill |
| Motor 6 & 7 Cable Restraint B |  |
01_Joint6_7_Cable Restraint_B.step | Bambu ABS Black | 2 | 0.4 nozzle, 0.2 layer height, 30% infill |
| - | Reference Price | Average 50$ | Price varies by material cost and printing time |
Long-term dragging of Wiring Harness 1 may abrade the motor connector and result in poor electrical contact. Printing the parts listed below can mitigate this risk.
| Part Description | Image | File Name | Material | Qty | Remarks |
|---|---|---|---|---|---|
| Wiring Harness Clips for Two Sides of Motor 1 |  |
DM_Motor1_wiring_harness_clip.stp |
Bambu Lab Black ABS | 2 | 0.4 mm nozzle, 0.2 mm layer height, 30% infill |
- Layer height: 0.2 mm
- Nozzle: 0.4 mm
- Supports: Add as needed
- Materials: High-temperature and load-bearing parts use ABS with 30–80% infill; may also use nylon or carbon-fiber reinforced materials. Cosmetic parts use PLA with 15% infill.
- Recommended materials for load-bearing parts:
Warning
Some parts that can be replaced with 3D printing are noted in the remarks, which can significantly reduce costs.
| Part Description | Image | File Name | Material | Qty | Machining | Notes |
|---|---|---|---|---|---|---|
| Motor 1 Bearing Mount |  |
02_Base_Reinforcement_Part.step | Aluminum Alloy 5052 | 1 | CNC | Can be 3D printed in ABS with high infill to reduce cost |
| Motor 1 Rotation Axis |  |
02_Arm_Yaw_Limit.step | Aluminum Alloy 5052 | 1 | CNC | Added yaw angle motion limit |
| Motor 2–5 Front Spacer |  |
02_Motor_Front_Spacer.step | Aluminum Alloy 5052 | 4 | CNC | Can be 3D printed in ABS with 30% infill |
| Motor 2–4 Rear Spacer |  |
02_Motor_Back_Spacer.step | Aluminum Alloy 5052 | 3 | CNC | |
| Motor 2–4 Rear Flange |  |
02_FLANGE.step | Aluminum Alloy 5052 | 3 | CNC | |
| Wrist Motor 5 Bracket |  |
02_Wrist_Bracket.step | Aluminum Alloy 5052 | 1 | CNC | |
| Gripper Connector A |  |
02_Gripper_Connector_A.step | Aluminum Alloy 5052 | 1 | CNC | |
| Gripper Connector B |  |
02_Gripper_Connector_B.step | Aluminum Alloy 5052 | 1 | CNC | |
| Gripper Slider Metal Bracket |  |
02_Slider_Bracket.step | Aluminum Alloy 5052 | 1 | CNC | Can be 3D printed in ABS with high infill, not recommended for long-term use |
| Slider to Gripper Extension |  |
02_Slider_Extension.step | Aluminum Alloy 5052 | 2 | CNC | |
| Upper-Lower Arm Link Left |  |
02_Lower_Upper_Link_L.step | Aluminum Alloy 5052 | 1 | CNC | |
| Upper-Lower Arm Link Right |  |
02_Lower_Upper_Link_R.step | Aluminum Alloy 5052 | 1 | CNC | |
| Lower Arm-Wrist Link Left |  |
02_Lower_Wrist_Link_L.step | Aluminum Alloy 5052 | 1 | CNC | |
| Lower Arm-Wrist Link Right |  |
02_Lower_Wrist_Link_R.step | Aluminum Alloy 5052 | 1 | CNC | |
| Gear Connector |  |
02_Gear_Connector.step | Aluminum Alloy 5052 | 1 | CNC | |
| Rack |  |
02_Rack.step | Aluminum Alloy 5052 | 2 | CNC | |
| Link 1 |  |
03_Link1.step | Aluminum Alloy 5052 | 1 | CNC + Sheet Metal | |
| Link 2 |  |
03_Link2.step | Aluminum Alloy 5052 | 2 | CNC + Sheet Metal | |
| Link 3 Left |  |
03_Link3_L.step | Aluminum Alloy 5052 | 1 | CNC + Sheet Metal | |
| Link 3 Right |  |
03_Link3_R.step | Aluminum Alloy 5052 | 1 | CNC + Sheet Metal | |
| Link 5 |  |
03_Link5.step | Aluminum Alloy 5052 | 1 | CNC + Sheet Metal | |
| - | Market Reference Price | Average 250$ | Price varies by aluminum cost, tolerance requirements, lead time |
- Key dimension tolerance: ±0.02 mm GB/T1840-M
- Surface finish: Anodizing / Sandblasting
- Mating parts recommended: H7 / interference fit
Warning
Since everyone will need to assemble and tighten the screws themselves, standard hex socket screws have been selected. After prolonged operation, the screws may loosen, which will affect the precision of the robotic arm. For this reason, you are required to purchase additional hot melt glue to perform thread locking on the screws at each joint.
If you have a power drill or similar tools, you may choose to buy lock washers or thread-locking screws instead. However, it is extremely important that you use the lowest torque setting when using an electric screwdriver to avoid thread stripping, which will result in irreversible damage.
| Name | Specification / Model | Quantity | Reference Price | Notes |
|---|---|---|---|---|
| Brushless motor | DM4310(V4) | 4 | 120 $/unit | SeeedStudio |
| Brushless motor | DM4340P(V4) | 3 | 175 $/unit | SeeedStudio |
| CAN-USB driver board | 1 | 15 $/unit | SeeedStudio | |
| Bearing | 6707ZZ | 1 | 13 $/unit | Amazong |
| Bearing | 6803ZZ | 3 | 13 $/unit | Amazong |
| Bearing | AXK5578 | 1 | 12 $/unit | Amazong |
| Linear rail | MGN9-170mm | 1 | 23 $/unit | Amazong |
| Slider block | MGN9 | 2 | 10 $/unit | Amazong |
| Gear | Module 1, boss type, 16 teeth, 6 mm bore | 1 | 44$/unit | Amazong |
| Silicone pad | 30x9x2mm | 1 | 10 $ | Amazong |
| Screw | HM3-12mm screw | 14+ | Amazong | |
| Screw | HM3-25mm screw | 14+ | Amazong | |
| Screw | HM3-6mm screw | 16+ | Amazong | |
| Screw | HM4-75mm set screw | 4+ | Amazong | |
| Screw | KM3*12mm screw | 30+ | Amazong | |
| Screw | KM3*16mm screw | 34+ | Amazong | |
| Screw | KM3*7mm screw | 76+ | Amazong | |
| Screw | KM3*9mm screw | 31+ | Amazong | |
| Screw | KM3*8mm Socket Micro Profile Head Screw | 31+ | Amazong | |
| Screw | KA3*12mm | 72+ | Amazong | |
| Dowel pin | M4*8mm | Several | Amazong | |
| Dowel pin | M4*12mm | Several | Amazong | |
| Screwdriver set | Hex key set | 1 | 16$ | Amazong |
 |
XT30 2+2 350mm | 2 | 4 $/cable | Both ends angled |
|
XT30 2+2 350mm | 1 | 4 $/cable | One angled end and one straight end |
|
XT30 2+2 200mm | 3 | 4 $/cable | Both ends angled |
|
XT30 2+2 200mm | 1 | 3 $/cable | Both ends straight |
You may modify your base freely based on the 3D printed parts we provide. You can also use G-clamps according to the thickness of your desktop.
| Name | Specification / Model | Quantity | Reference Price | Notes |
|---|---|---|---|---|
| Woodworking clamp | 6-inch G clamp | 2 | 20 $/unit | Amazong |
The robotic arm is shipped without a power supply by default. You may connect your own battery, or purchase a reliable 24V 14.6A MeanWell power supply made in Taiwan. Additionally, you will need to buy a three-pin plug compliant with local standards and a wiring harness with XT30 female connector.
| Name | Specification | Qty | Reference Price | Notes | Image |
|---|---|---|---|---|---|
| Power Supply | LRS-350-24 (24V 14.6A) | 1 | $27.35 | amazon |  |
| Power Cord | US Standard AC Cable | 1 | $4.49 | amazon |  |
| Output Port | XT60E Fixed Female Connector; XT60E Female + Lug - 10cm; 4mm Lug Hole | 1 | $9.99 | amazon |  |
| Power AC Wiring | 1.5mm²; Red, Blue, Yellow x1 each(User must crimp terminals to the wire — pre-crimped leads not included.); 10CM | 3 | $0.99 | aliexpress |  |
| 3-in-1 IEC Inlet Socket | Quick-connect type with red switch (Dual Nuts) | 1 | $1.98 | aliexpress |  |
| XT30 to XT60 adapter cable plug 12awg | XT30U female to XT60 male, cable length 50cm | 1 | 9.98$ | amazon |  |
| 304 Stainless Steel Phillips Countersunk Head Screw | M4x6 | 6 | $0.37 | / | / |
| 304 Stainless Steel Phillips Countersunk Head Screw | M3x8 | 2 | $0.36 | / | / |
| 304 Stainless Steel Phillips Pan Head Screw | M3x8 | 2 | $0.32 | / | / |
| Hex Nut | M3x2.5 | 2 | 2.10 CNY | / | / |
| Name | Image | Qty | Notes |
|---|---|---|---|
| Front Cover |  |
1 | PLA, 0.4mm Nozzle, 0.2mm Layer Height, 30% Infill |
| Rear Cover |  |
1 | PLA, 0.4mm Nozzle, 0.2mm Layer Height, 30% Infill |
| Front Cover Slider |  |
1 | PLA, 0.4mm Nozzle, 0.2mm Layer Height, 30% Infill |
The power supply assembly is divided into two main sections: the Front Cover and the Rear Cover.
| Step | Operation Instructions | Image | Remarks |
|---|---|---|---|
| 1-1 | Prepare the parts and printed components required for front shell assembly |  |
Check that all parts are complete |
| 1-2 | Wiring sequence instructions for each part; assemble according to the wiring sequence | .png) .png) .png) |
Connect strictly according to the wiring sequence |
| 1-3 | Install the XT60 connector | .png) .png) |
Secure with 304 stainless steel Phillips countersunk head screws M3x8 and hex nuts M3x2.5 |
| 1-4 | Install the 3-in-1 IEC socket | .png) .png) |
Secure the 3-in-1 IEC socket with 304 stainless steel Phillips pan head screws M3x8 |
| 1-5 | Internal wiring of the front shell | .png) .png) |
Check connections against the wiring sequence diagram |
| 1-6 | Secure both sides of the front shell and the power supply | .png) .png) |
M4x6 304 stainless steel Phillips countersunk head screws x2 |
| 1-7 | Install the sliding cover | .png) .png) |
Push in from the bottom of the power supply |
| 1-8 | Secure the sliding cover |  |
M4x6 304 stainless steel Phillips countersunk head screws x2 |
| Step | Operation Instructions | Image | Remarks |
|---|---|---|---|
| 2-1 | Prepare the parts and printed components required for rear shell assembly |  |
Check accessories for completeness |
| 2-2 | Assemble the rear shell with the power supply |  |
Align the position |
| 2-3 | Secure both sides of the rear shell and the power supply | .png) .png) |
M4x6 304 stainless steel Phillips countersunk head screws x2 |
| Step | Operation Instructions | Image | Remarks |
|---|---|---|---|
| 1 | Power supply solution assembly completed |  |
Check that all screws are tightened |