> For the complete documentation index, see [llms.txt](https://ruka.gitbook.io/instructions/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ruka.gitbook.io/instructions/hardware/heat-set-insert-tutorial-+-assembly.md). # Heat Set Insert Tutorial + Assembly Heat set inserts are used to add metal threads to 3D-printed parts. Many parts of the hand use these. They are inserted into the plastic parts using a soldering iron. The iron heats the metal, allowing you to push the insert in and melt the plastic around it. ## **Tutorials for Heat Set Inserts** In addition to the video instructions, using a razor blade to push the heat set insert in for the last millimeter or so is helpful. This ensures it is flush with the surface. [Markforged Blog Post on Using Heat Set Inserts ](https://markforged.com/resources/blog/heat-set-inserts) {% embed url="" %} ## **Materials** #### **Tools** * Soldering Iron * Soldering Tips * Razor Blade #### **3D Printed Parts** Every 3D printed part other than the Backhand and Base Plate is used in this section. #### **Hardware (Total)**

Part Name	Total Quantity
M2 x 4 x 3.5 mm insert	30
M2 x 6 x 3.5 mm insert	8
M2 x 8 x 3.5 mm insert	4
M3 x 6 x 5 mm insert	8
M3 x 4 x 5 mm insert	1
M5 x 6 x 7 mm insert	4

## Instructions ### 1. Fingers: Middle, Index, Ring

Part Name	Quantity
M2 x 4 x 3.5 Heat Set Inserts	15
Finger Joint 1 - Printed Part	3
Finger Joint 2 - Printed Part	3
Finger Joint 3 - Printed Part	3

{% hint style="warning" %} **Repeat instructions 3 times (to make 3 fingers)** {% endhint %}


Finger Joint 1	Finger Joint 2	Finger Joint 3
x 2 - M2 x 4 x 3.5	x 2 - M2 x 4 x 3.5	x 1 - M2 x 4 x 3.5
			/files/zN2enCDtgxBZjIjPhhbr

### 2. Pinky Repeat the same process as above but on the pinky parts.

Part Name	Quantity
M2 x 4 x 3.5 Heat Set Inserts	6
Pinky Joint 1 - Printed Part	1
Pinky Joint 2 - Printed Part	1
Pinky Joint 3 - Printed Part	1


Pinky Joint 1	Pinky Joint 2	Pinky Joint 3
x 2 - M2 x 4 x 3.5	x 2 - M2 x 4 x 3.5	x 1 - M2 x 4 x 3.5
			/files/zN2enCDtgxBZjIjPhhbr

### 3. Thumb

Part Name	Quantity
M2 x 4 x 3.5 Heat Set Inserts	4
M3 x 4 x 5 Heat Set Insert	1
Thumb Joint 1 - Printed Part	1
Thumb Joint 2 - Printed Part	1
Thumb Joint 3 - Printed Part	1


Thumb Joint 1	Thumb Joint 2	Thumb Joint 3
x 1 - M2 x 4 x 3.5 x1 - M3 x 4 x 5	x 2 - M2 x 4 x 3.5	x 1 - M2 x 4 x 3.5
			/files/zN2enCDtgxBZjIjPhhbr

### 4. Knuckle

Part Name	Quantity
M2 x 4 x 3.5 Heat Set Inserts	5
Tophand - Index + Middle - Printed Part	1
Tophand - Pinky + Ring - Printed Part	1


Tophand - Index + Middle	Tophand - Pinky + Ring
x 2 - M2 x 4 x 3.5	x 3 - M2 x 4 x 3.5
		/files/zN2enCDtgxBZjIjPhhbr

### 5. Palm + Wrist

Part Name	Quantity
M2 x 6 x 3.5 Heat Set Inserts	8
M2 x 3 x 3.5 Heat Set Inserts	null
M5 x 6 x 7 Heat Set Inserts	2
Palm + Wrist - Printed Part	1


Palm	Palm	Wrist
x 8 - M2 x 6 x 3.5	x 4 - M2 x 3 x 3.5	x 2 - M5 x 6 x 7
			/files/zN2enCDtgxBZjIjPhhbr

### 6. Backhand

Part Name	Quantity
M2 x 6 x 3.5 Heat Set Inserts	2
Backhand - Printed Part	1

**Back Hand** **x 2** - M2 x 6 x 3.5

*** ### 7. Top Plate

Part Name	Quantity
M5 x 6 x 7 Heat Set Inserts	2
Top Plate - Printed Part	1

**Top Plate** **x 2** - M5 x 6 x 7

*** ### 8. Thumb Motor Panel (For XM430 Motors)

Part Name	Quantity
M5 x 6 x 7 Heat Set Inserts	2
M3 x 6 x 5 Heat Set Inserts	4
Thumb Motor Plate - Printed Part	1


Thumb Motor Panel	Thumb Motor Panel	Thumb Motor Panel
x 2 - M5 x 6 x 7	x 2 - M3 x 6 x 5	x 2 - M3 x 6 x 5
			/files/zN2enCDtgxBZjIjPhhbr

### 9. Motor Panel 1 and Motor Panel 2

Part Name	Quantity
M5 x 6 x 7 Heat Set Inserts	4
M2 x 8 x 3.5 Heat Set Inserts	4
M3 x 6 x 5 Heat Set Inserts	4
M3 x 6 x 5 Heat Set Inserts	2
Motor Panel 1 - Printed Part	1
Motor Panel 2 - Printed Part	1

**Repeat the same process (but mirrored) for Panel 2**


Motor Panel 1	Motor Panel 1	Motor Panel 1
x 2 - M5 x 6 x 7	x 2 - M3 x 6 x 5 x 1 - M3 x 8 x 5	x1 - M2 x 8 x 3.5
			/files/zN2enCDtgxBZjIjPhhbr

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