Mechanical
Linear Bearings¶
LM8UU linear bearings. IKO and Misumi are good quality brands.
There are 10 bearings in total, 3 on the X-axis, Z-axis has 4 and 3 more on the Y-axis. Guide to replacing bearings.
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You can change from linear ball bearings to Igus Drylin or similar polymer bearings. More info...
Belts¶
Uses widely available Gates LL-2GT 6mm. You can also find other brand belts for cheaper online or in automotive stores but Gates belts are quality.
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Linear Rods¶
Hardened steel 8mm diameter linear rods.1
X-axis length: 355mm
Y-axis length: 340mm
Z-axis length: 400mm
Lead Screw¶
Uses two T8, 2mm Pitch, 4mm Lead, 2 Start lead screws for Z-axis.2
| Length | Dia. | Pitch | Lead | Start |
|---|---|---|---|---|
| 376mm | 8mm | 2mm | 4mm | 2 |
Pitch is the distance between threads.
Lead is the displacement of the nut on the axis of the screw after one turn of the screw.
Z-Axis Couplers¶
D20L25 5x8x25mm Rigid Coupling
| Type | Qty | Dia. | Length | Motor Shaft Dia. | Lead Screw Dia. |
|---|---|---|---|---|---|
| Rigid | 2 | 20mm | 25mm | 5mm | 8mm |
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Motors¶
X-Axis Motor¶
NEMA17 42-34 1.3A 1.8° D5, shaft length 24mm, 42D16C409-02 from dgjlmotor.com
Y-Axis Motor¶
NEMA17 42-34 1.3A 1.8° D5, shaft length 24mm, 42D16C409-02 from dgjlmotor.com
Z-Axis Motor¶
NEMA17 42-34 0.8A 1.8° D5, shaft length 24mm, 42D16C404-01 from dgjlmotor.com
Extruder Motor¶
NEMA17 42-23 stepper motor (double output with gear).