Left Arm Parts

Keep left arm parts separate from right arm parts. Retain the 12 M4x45 socket bolts with the completed arm: they are used during torso installation and are not counted again in the torso checklist.

Quantities are based on the assembly instructions, not a verified shipping manifest. Check the full quantity before ticking a row; leave uncertain items unchecked.

Left Arm Module: laid-out view

Visual layout coming later. Use the checklist below to identify and count parts; numbered parts open an individual 3D preview.

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Parts and Components

Check a row only after finding its full quantity. Open a part number to inspect its shape.

Check	Part / specification	Qty
	Assembly references shoulder joint assembly / step 1	1
	Assembly references shoulder joint assembly / step 2	1
	Assembly references upper arm assembly / step 3	1
	Assembly references upper arm assembly / step 4	1
	Assembly references shoulder and upper arm connection / step 7	1
	Assembly references shoulder and upper arm connection / step 7	1
	Assembly references shoulder and upper arm connection / step 8	1
	Assembly references shoulder and upper arm connection / step 8	1
	Assembly references forearm assembly / step 9	1
	Step 12 refers to a bearing already on this plate; no separate installation, bearing specification, or new bearing quantity is given. No additional bearing is counted. Assembly references forearm assembly / step 10 forearm assembly / step 12	1
	Assembly references forearm assembly / step 10	1
	Assembly references forearm assembly / step 11	1
	Assembly references forearm assembly / step 11	1
	Assembly references forearm assembly / step 12	1
	Assembly references forearm assembly / step 12	1
	Assembly references forearm assembly / step 12	1
	EC-A5013-H17-100 actuator Actuator ID 13. Assembly references shoulder joint assembly / step 1	1
	EC-A4315-P2-36 actuator Actuator ID 14. Assembly references upper arm assembly / step 5	1
	EC-A3814-H14-107 actuator Actuator ID 15. Assembly references upper arm assembly / step 5	1
	EC-A4310-P2-36 actuator Actuator IDs 16 (elbow) and 17 (wrist). Assembly references forearm assembly / step 9 forearm assembly / step 12	2
	Single-ended XT30 (2+2) cable - 180 mm One each for actuator IDs 13 and 15; later routing and joining reuse these cables. Assembly references shoulder joint assembly / step 2 upper arm assembly / step 5 shoulder and upper arm connection / step 7 shoulder and upper arm connection / step 8 upper arm and forearm connection / step 13	2
	Single-ended XT30 (2+2) cable - 100 mm One each for actuator IDs 14 and 16. Assembly references shoulder and upper arm connection / step 7 forearm assembly / step 9 upper arm and forearm connection / step 13	2
	Double-ended XT30 (2+2) cable - 100 mm Assembly references upper arm assembly / step 5	1
	Double-ended XT30 (2+2) cable - 230 mm Connected to ID 16 in Step 9; its free connector is connected to ID 17 in Step 12, not a new cable. Assembly references forearm assembly / step 9 forearm assembly / step 12	1
	WAGO connector Connector model is unspecified. Assembly references upper arm and forearm connection / step 13	4

Hardware

Count the hardware and keep it in labelled bags or compartments. Laying out every bolt is optional; checking its quantity is part of this checklist.

Check	Part / specification	Qty
	M4x8 flat bolt Assembly references shoulder joint assembly / step 1	12
	M5x25 socket bolt Assembly references shoulder joint assembly / step 2	6
	M4 square nut Assembly references upper arm assembly / step 3 upper arm assembly / step 4	10
	M4x16 socket bolt Three introduced in Step 3 and three in Step 4; Steps 5 and 6 only tighten those retained bolts. Assembly references upper arm assembly / step 3 upper arm assembly / step 4 upper arm assembly / step 5 upper arm assembly / step 6	6
	Flanged ball bearing 4390N159 Assembly references upper arm assembly / step 3	1
	M4x25 socket bolt Staged in Step 4, then removed and reinstalled in Step 6; counted once. Assembly references upper arm assembly / step 4 upper arm assembly / step 6	4
	M3x12 flat bolt 6 + 8 + 6 + 16 new bolts in Steps 5, 8, 10, and 12 respectively. Assembly references shoulder and upper arm connection / step 8 upper arm assembly / step 5 forearm assembly / step 10 forearm assembly / step 12	36
	M4x8 socket bolt Assembly references upper arm assembly / step 6 upper arm assembly / step 5	6
	M4x12 flat bolt Assembly references shoulder and upper arm connection / step 7	8
	M3x16 flat bolt Assembly references shoulder and upper arm connection / step 7 forearm assembly / step 11	12
	M4x20 socket bolt Assembly references shoulder and upper arm connection / step 8	6
	M4x16 flat bolt Assembly references forearm assembly / step 10	10
	M4x10 flat bolt Assembly references forearm assembly / step 11 forearm assembly / step 12	6
	M4x12 socket bolt Assembly references upper arm and forearm connection / step 13	6
	M4x45 socket bolt Staged in the arm and retained for torso attachment; counted here, to be excluded from torso inventory. Assembly references upper arm and forearm connection / step 13	12