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BearExxa V2

Bill of Materials

Introduction

The hardware list below is to build the extruder and X from scratch. It does include all the hardware like if you didn't have a printer. In the tables below, the column "Reused from Prusa" indicates that you can reuse the part from your Original Prusa MK2.5(S, S+) or MK3(S, S+).

Hardware X Axis

Part Quantity Comment / Links Reused from Prusa
M2x12 (ISO 4762) 2 ⚠️ MK2.5(S, S+) only no
M3x10 (ISO 4762) 6 no
M3x18 (ISO 4762) 9 no
M3 hex nut (ISO 4032) 10 no
M3 hex nylock nuts (DIN 985) 2 no
Dowel pin, dia 2.90mm +/-0.05, length 15.8mm +/-0.1 1 Cut an M3 screw if you can't find one no
2GT 16T pulley 5mm bore 1 yes
2GT 20T idler 3mm bore 1 yes
Bearings LM8UU 4 yes
Smooth rods, dia 8mm H6, length 370mm 2 yes
Belt Gates LL-2GT RF, width 6mm, length 880mm 1 yes

Hardware Extruder

Part Quantity Comment / Link Reused from Prusa
M2x8 (ISO 4762) 1 no
M3x6 button head (ISO 7380) 2 no
M3x10 (ISO 4762) 8 no
M3x18 (ISO 4762) 8 no
M3x30 (ISO 4762) 6 no
M3x40 (ISO 4762) 2 no
M3x50 (ISO 4762) 2 no
M3 square nut (DIN 562) 14 no
M3 hex nut (ISO 4032) 8 no
M3 washer (DIN 125) 2 no
PTFE tube 4x2, length 32mm +0.0/-0.5 1 no
Bondtech drivegear 1.75/5.0 (dual hobb gears) 1 yes
Bondtech motor gear 17 teeth 1 Bondtech store no
Bondtech shaft assembly gear 50 teeth 1 Bondtech store no
Bondtech shaft 3x20 1 Bondtech store yes
Bondtech shaft 3x32 1 Bondtech store no
MR105 ZZ bearing (10x5x4) 2 no
E3D Revo Micro heatsink 1 E3D store no
E3D Revo Micro fan 1 E3D store no
E3D Revo 0.4mm brass nozzle 1 E3D store no
E3D Revo Heater Core 12V/24V 40W 104-NT 1 12V for MK2.5(S, S+)
24V for MK3(S, S+)
E3D store
no
Pancake motor Nema 17 25mm LDO 42STH25-1004AC or Bondtech BMG OSM 17HS10-0704S 1 Bondtech store no
Prusa filament sensor with cable 1 yes
Prusa 7mm steel ball 1 yes
Prusa 20x6x2 magnet 1 yes
Prusa 10x6x2 magnet 1 yes
Prusa Pinda V2 or SuperPinda 1 yes
Prusa extruder spring 1 yes
Bearings LM8UU 3 yes
Nylon cable, dia 2.85-3mm, length 500mm 1 yes
Zip ties 2.5x100mm 4 no

Printed Parts

Part Quantity Comment
e_bearing_screw 1
e_body 1
e_cover 1
e_fan_mount 1
e_fs_adapter 1
e_fs_cover 1
e_fs_lever 1
e_groove_mount 1
e_motor_plate 1
e_nozzle_fan_duct 1
e_pinda_mount 1
e_tensioner 1
tool_ptfe_cutter_32mm 1
x_carriage 1
x_carriage_back 1
x_carriage_mk2_cable_guide 1 MK2.5, MK2.5S, MK2.5S+ only
x_carriage_mk2_endstop 1 MK2.5, MK2.5S, MK2.5S+ only
x_carriage_mk3_cable_guide 1 MK3, MK3S and MK3S+ only
x_end_idler 1
x_end_idler_tensioner 1
x_end_motor_mk2 1 MK2.5, MK2.5S, MK2.5S+ only
x_end_motor_mk3 1 MK3, MK3S and MK3S+ only