# Bear Frame Upgrade 2.1

## Y idler tensioner for E3D toothed idler



### Introduction

This is a Y idler tensioner compatible with the E3D toothed idler

![Bear 2.1 Idler Tensioner for E3D Gates pulleys](y_idler_tensioner_e3d.jpg)



### Bill of Materials

| Part     | Quantity | Detail |
|----------|:--------:|--------|
| E3D Gates 2GT Toothed Idler<br/>6mm Belt, 20 Tooth, 5mm ID | 1 | [E3D store link](https://e3d-online.com/products/gates-powergrip%C2%AE-2gt-idlers) |
| Dowel pin<br/>diameter: 4.90-4.95mm<br/>length: 15.8mm | 1 | Must fit the 2GT idler bearing.<br/>:pushpin: Cut a M5 screw if you can't find one |
| M3x30mm socket head screw ISO 4762 | 1 | |
| M3x25mm socket head screw ISO 4762 | 1 | |
| M3 Hex nylock nuts (DIN 985) | 2 | |
| M3 steel washer DIN 125, 0.5mm thick | 1 | |



### Printed Parts

:warning: Warning: It is important to follow the recommended print settings and to **calibrate your extrusion multiplier** before printing the parts (for each and every spool that you use). [Check our calibration guide here](https://guides.bear-lab.com/Guide/Extrusion+multiplier+and+filament+diameter/8).

| Part     | Quantity | Download link |
|----------|:--------:|---------------|
| y_idler_mount<br/>(from standard Bear 2.1 printed parts) | 1 | [y_idler_mount.stl](../../printed_parts/common_to_all_versions/stl/y_idler_mount.stl?raw=true) |
| y_idler_tensioner_e3d<br/>(from this page)               | 1 | [y_idler_tensioner_e3d.stl](printed_parts/y_idler_tensioner_e3d.stl?raw=true) |



### Print Settings

:warning: Warning: It is important to follow the recommended print settings and to **calibrate your extrusion multiplier** before printing the parts (for each and every spool that you use). [Check our calibration guide here](https://guides.bear-lab.com/Guide/Extrusion+multiplier+and+filament+diameter/8).

* Filament type: PETG
* Slicer: PrusaSlicer
* Infill type : Gyroid recommended
* Support : No
* Brim : No
* Detect thin walls : No
* Perimeters width (internal and external) : 0.45mm

| Part | Layer<br/>Height<br/>[mm] | Infill [%] | Num.<br/>Perimeters | Num.<br/>Top/Bottom<br/>Layers |
|:-----|:-------------------------:|:----------:|:-------------------:|:------------------------------:|
| y_idler_mount       | 0.20 | 20 | 4 | 5 |
| y_idler_tension_e3d | 0.20 | 20 | 4 | 5 |



### Assembly instructions

Follow the same assembly instructions as for the standard Bear 2.1 Y idler.