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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

Bill of Materials

Part Quantity Detail
E3D Gates 2GT Toothed Idler
6mm Belt, 20 Tooth, 5mm ID		 1 E3D store link
Dowel pin
diameter: 4.90-4.95mm
length: 15.8mm		 1 Must fit the 2GT idler bearing.
📌 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: 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.

Part Quantity Download link
y_idler_mount
(from standard Bear 2.1 printed parts)		 1 y_idler_mount.stl
y_idler_tensioner_e3d
(from this page)		 1 y_idler_tensioner_e3d.stl

Print Settings

⚠️ 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.

  • 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
Height
[mm]		 Infill [%] Num.
Perimeters		 Num.
Top/Bottom
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.