Nema 17 Stepper 5:1 Planetary Gearbox with 5mm shaft for GT2 pulley

Nema 17 Gearbox with 5mm shaft, fits GT2 Timing Belt Pulley.
Remix of: http://www.thingiverse.com/thing:8460

Cover is in two versions with or without 4mm holes for M3 threaded inserts.

Bill of materials:
Nema 17 stepper motor
M3 nuts 6pcs
M3 threaded inserts 4pcs (cover, Kerb Konus S-Lok PN: 860 000 030.800)
M3 self locking nuts 3pcs (planets)
M3 washers 3pcs
M3x8 grub screws 2pcs (sun)
M3x16 3pcs (planets)
M3x8 4pcs (stepper motor)
M3x12 4pcs (cover)
M5x30 1pcs (shaft)
M5 self locking nuts 1pcs (shaft)
695zz ball bearing 2pcs (shaft)
683zz ball bearing 6pcs (planets, 2pcs each)

Print instructions

Rafts: No

Supports: Yes

Resolution: 0.1mm - 0.2mm

Infill: 40% - 100%

Notes:

Filament: PET 1.75mm (http://www.filament-pm.cz/)
Sliced in: Cura 15.04.2
Nozzle: 0.4mm
Shell thickness: 1.2mm
Bottom/Top thickness: 1.2mm
Print speed: 30mm/s
Print temp: 235°C
Bed temp: 80°C
Planets and sun printed in 0.1mm layer height with 100% infill. Other parts in 0.2mm layer height with 40% infill.