| Part | Quantity | Detail | Example Links |
|---|---|---|---|
| Original Prusa i3 MK2(S) or MK2.5(S) or MK3(S)(S+) | 1 | Prusa | |
| V-Slot 20x40 331mm | 2 | Openbuilds | |
| V-Slot 20x40 359mm | 2 | Openbuilds | |
| V-Slot 20x40 370mm | 2 | Openbuilds | |
| V-Slot 20x40 290mm | 1 | Openbuilds | |
| Black angle corner | 4 | Openbuilds | |
| 90 degree joining plate | 10 | Openbuilds | |
| Tee-nuts M5 | 88 | 50x for 90° plates, 8x for angle corner, 30x for printed parts |
Openbuilds |
| M5x8mm button head screw (ISO 7380) | 12 | 8x for angle corner, 4x printed parts |
Openbuilds McMaster-Carr |
| M5x10mm button head screw (ISO 7380) | 62 | 46x for 90° plates, 16x for printed parts |
Openbuilds McMaster-Carr |
| M5x12mm button head screw (ISO 7380) | 13 | 1x for Y motor mount, 8x for Y rod holders, 4x for feet |
Openbuilds McMaster-Carr |
| M5x16mm button head screw (ISO 7380) | 1 | 1x for Y motor mount | McMaster-Carr |
| M3x14mm socket head screw (ISO 4762) | 2 | 2x RAMBo base mounts | McMaster-Carr |
| M3x18mm socket head screw (ISO 4762) | 3 | 3x Y motor mount | McMaster-Carr |
| M3x25mm socket head screw (ISO 4762) | 7 | 1x for Y idler, 6x for Y bearing holders | McMaster-Carr |
| M3x30mm socket head screw (ISO 4762) | 1 | 1x for Y idler | McMaster-Carr |
| Set screw M4x5mm | 12 | for end_caps | McMaster-Carr |
| Dowel pin dia: 2.90-2.95mm length: 15.8-16mm |
1 | 📌 Cut a M3 screw if you can't find one | |
| M3 hex nuts DIN 934 | 2 | 2x for Rambo base mounts | McMaster-Carr |
| M3 nylock nut DIN 985 | 2 | 2x for Y idler | McMaster-Carr |
| M3 square nut DIN 562 | 2 | 1x for Y belt holder, 1x for lower PSU mount | |
| M3 flat washer (ISO 7089) | 2 | 1x for Y idler | |
| Zip ties 2.5x100mm | 30 |
A full BOM with all parts to build a Bear from scratch has been made by Chris Riley and 3D_Gussner, you can find it here: https://docs.google.com/spreadsheets/d/1AKX1dBssPeFiCTYAHjYHZiUIhAR5COqE82Bq8tjKFSE/edit?usp=sharing . Massive thank you to Chris and 3D_Gussner!
| Part | Quantity | Comment |
|---|---|---|
| build_helper_y | 1 | |
| build_helper_z | 1 | |
| cable_clip_horizontal | 2 | |
| cable_clip_lcd | 5 | |
| cable_clip_vertical | 6 | |
| foot | 4 | |
| lcd_support_a | 1 | |
| lcd_support_b | 1 | |
| psu_lower_mount | 1 | File name may vary depending your PSU version |
| psu_upper_mount | 2 | File name may vary depending your PSU version |
| rambo_base_lower_mount | 1 | |
| rambo_base_upper_mount | 1 | |
| rambo_hinge_lower | 1 | File name may vary depending your printer version |
| rambo_hinge_upper | 1 | File name may vary depending your printer version |
| y_bearing_holder | 3 | |
| y_belt_holder | 1 | |
| y_end_caps | 2 | Total of 4 printed parts |
| y_idler_mount | 1 | |
| y_idler_tensioner | 1 | |
| y_motor_endstop_mount | 1 | |
| y_motor_mount | 1 | |
| y_rod_holder | 4 | |
| z_end_caps | 1 | Total of 2 printed parts |
| z_leadscrew_cap | 2 | |
| z_motor_mounts | 1 | Total of 2 printed parts |
| z_tops | 1 | Total of 2 printed parts |