573 planetary 1 3d models found
Download or buy, then render or print from the shops or marketplaces.
3D Models below are suitable not only for printing but also for any
computer graphics like CG, VFX, Animation, or even CAD. You can print these 3d models on
your favorite 3d printer or render them with your preferred render engine.
Please note that the 3D model database is only a Search Engine. You should
visit the original websites. Most of the models can be easily imported and rendered
with Autodesk 3ds Max, Maya, Blender, C4D, and Sketchup. Check for online
3d model conversions tools for your file format.
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$10
k-mf series planetary reducer
...from 3 to 1000 to 3, low back clearance, 8-1 arc minutes for the whole series of single section....
3d_export
$32
speed reducer gear box worm helical wpx
...is a mechanical device to shift rotational speed. a planetary reduction drive is a small scale version using ball...
3d_export
$12
Planetary Atomic Model 03
...x 8.57" x 8.43"<br>- model parts: 7<br>- material count: 1lt;br>- xform: yes<br>- boxtrick:...
3d_export
$12
Planetary Atomic Model 01
...t; x 8.46" x 9.5"<br>- model parts: 7<br>- material count: 1<br>- xform: yes<br>- boxtrick: yes
3d_export
$12
Planetary Atomic Model 02
...x 8.75" x 8.25"<br>- model parts: 7<br>- material count: 1lt;br>- xform: yes<br>- boxtrick:...
3d_export
$12
uss iowa - deep space exploration vessel
...purposes, including communications, earth observation, meteorology, navigation, space colonization, planetary exploration, and transportation of humans and cargo. all spacecraft...
thingiverse
free
Planetary Gears 1:1 by Adolph
...planetary gears 1:1 by adolph
thingiverse
planetary gear set 90mm radius 18 thick
thingiverse
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~600:1 planetary gearbox
...tary gears facing the center.
4) take sun gear_2 and push it in from the bottom.
5) put on the backplate and install the bearing.
thingiverse
free
Planetary Gears - Test 1 by gruen
...planetary gears - test 1 by gruen
thingiverse
trying to make planetary gears.
thingiverse
free
1:36 Compound Planetary Gear
...cal model planetary planetary_gear toy winch
this is a single compound planetary gear which has a combined gear ratio of 1 to 36.
thingiverse
free
Planetary Gear set 1:1 by Adolph
...thingiverse
planetary gear set 1:1 for more power. design by ivander oosthuizen from pretoria south-africa for my robot project.
thingiverse
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18mm 1/100 Planetary militia by AliothReuas
...18mm 1/100 planetary militia by aliothreuas
thingiverse
grunts planetary militia
thingiverse
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Small planetary gear 1:4 ratio by CastorX
...small planetary gear 1:4 ratio by castorx
thingiverse
a simple planetary gear with about 1:4 gear ratio.
thingiverse
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Planetary gear reducer with 1:125 reduction by Pagano
... with 1:125 reduction by pagano
thingiverse
https://www.instagram.com/p/cfunjv3jwnf/
planetary gear reducer with 1:125 reduction
thingiverse
free
Two-Stage Planetary Gearbox (20.25:1) by roklobster04
...s is a simple two-stage planetary gearbox with a reduction of 20.25:1 meant for demonstrating gears. it makes a nice paperweight.
thingiverse
free
4:1 2 speed planetary gearbox by BoilerPlateDan
...d planetary gearbox by boilerplatedan
thingiverse
multi-speed planetary gearbox. should be able to be scaled to reduce the size.
thingiverse
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42 stepper motor 25:1 Planetary Reducer by below_cho
...ar ratio of this reducer is 25:1. hope it can lift more weight.
thanks~~
https://youtu.be/eytrcf0ml1qhttps://youtu.be/cv-hignp-ni
thingiverse
free
planetary gear 5:1 with ball bearing by Beware
...ll bearings, it's running but not perfect.
if you want use it please remember that it's better to do some modifikation.
thingiverse
free
3:1 Planetary Gearbox by fwx2396
... and endcaps the enclose the gears. the holes in the corners allow for a number 8 or m4 bolt and nut to hold everything together.
thingiverse
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4:1 Planetary Gearbox by fwx2396
... and endcaps the enclose the gears. the holes in the corners allow for a number 8 or m4 bolt and nut to hold everything together.
thingiverse
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10:1 Planetary Gearbox by fwx2396
... and endcaps the enclose the gears. the holes in the corners allow for a number 8 or m4 bolt and nut to hold everything together.
thingiverse
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Modular planetary gearbox 1024:1 by RomanHujer
...epper motor
15x 2 x 6mm self tapping screw
4x m3 x 80mm threaded rod
3x m3 x 8mm screw
7x m3 nuts
1x m5 nuts
1x m5 x 20mm screw
thingiverse
free
Nema 17 planetary gearbox reductor 1:3 by ahven11
...r 1:3 by ahven11
thingiverse
reduction ratio 1:4
uses two bearings, size 18x12x4. should be easily available.
m3 bolts and nuts.
thingiverse
free
Planetary Gear Module Part 1 by Anthonylu
...ebook.com/86duino
special thanks to prof. thang authorization
youtube channel thang010146https://www.youtube.com/user/thang010146
thingiverse
free
Planetary gearbox 1:232.5 for 130 motor by ekowi
...the carrier
20mm x4 for joining annulus to motor support
30mm (+ 1 nut) for main axle
a 36mm i.d. x 3mm o-ring is used as a tire.
thingiverse
free
Planetary Atom Pendant Versions 1 & 2 by 3P3D
...uot; x 1/8"
if you would like to purchase a physical print of this model visit my shop on shapeways @ http://shpws.me/nqpl
thingiverse
free
4:1 Planetary Extruder
...ng
added additional 06.spacer_1mm to sit under extruder head. old spacer still included to suit under planetary gearbox if needed
thingiverse
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Nema 17 planetary gear 3:1 by bartoaster
... imperfections in printing can cause more friction.
a modified housing for coupling with a nema 17 motor will be added soon (tm).
thingiverse
free
NEMA 23 Planetary gearbox reducer, 1:3.333 ratio by ErikRudec
...ication is essential - you should not run the gears dry or the planets will bind to the carrier. apply a lot of lubricant grease.
thingiverse
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6:1 Stackable Planetary Gear by DbC
...density
cover: 1 hour 42 minutes, 8.13 meters
ring gear: 1 hour 48 minutes, 8.43 meters
100% fill
sun gear: 7 minutes 0.46 meters
thingiverse
free
1,048,576:1 Planetary gear set derived from "Tiny Planetary Gears Set" by aubenc by mgg942
...ordless drill) it would take over 5 hours! suspect that the drill would lose charge and the gear box would overheat and seize up.
thingiverse
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Nema 14 Stepper Motor with 5:1 Planetary Gearbox Model Dummy by DjDemonD
...tor body if using this to make a new design.
please note this specific model of motor has a 6mm od output shaft from the gearbox.
thingiverse
free
1024:1 planetary gear set derived from "Tiny Planetary Gears Set" by aubenc by mgg942
...with a bit of fine scaling adjustment in your slicer. also, i'm thinking of making it 10 stage.
edit 2015 02 05, made in pla.
thingiverse
free
harmonic planetary drive 13.5:1 by feileung
...se inside - outside option (print inside first)
m350mm screw 3
m3 nut * 7
6807zz bearing (35x47x7) 1
mr105 bearing (5x10x4) 4
3dcadbrowser
free
Planetary Gearbox NEU P32 1:6.75 3D CAD Model
...3d object can be downloaded in .step, .iges, .max, .obj, .3ds, .fbx, .dxf, .lwo, .stl, .wrl, .ma, .dae, .x and .asc file formats.
thingiverse
free
1379:1 Compound Planetary Gearbox by Gear_Down_For_What
...cool projects and upgrades, don't forget to follow me on thingiverse and subscribe to my youtube channel
gear down for what?
thingiverse
free
115:1 3 stage planetary gearbox
...her. the torque at the last stage is a bit high so if possible it's recommended to replace the spider with a sheet metal one.
thingiverse
free
Planetary Gear 5:1 supersized (not NEMA) by DropBOB_Designs
...u the actual hardware sizes. otherwise, just modify the sizes to fit your own hardware. not hard, good skill to build.
cheers,
-b
thingiverse
free
Planetary Gearbox - High Reduction Ratio (118.1:1) by Alphie
...nt), please let me know!
thanks for viewing/watching!
animation:http://youtu.be/m0p7m_uoyj4
video:http://youtu.be/nrgnopi60dw
thingiverse
free
-60:1 Compound Planetary Gear Reducer by Gear_Down_For_What
...more cool gearbox projects, don't forget subscribe to gear down for what?! https://www.youtube.com/c/geardownforwhat
thanks!
thingiverse
free
20:1 & 20:-1 Compound Planetary Scissor Gearbox by Gear_Down_For_What
...be channel
gear down for what?
thanks!
special thanks to ross korsky for doing the design calculations on this one! great work!
thingiverse
free
Gear planetary by DViktor
...4 at the moment the extruder gearbox installed version 116 ...
thingiverse
free
Compact compund planetary reducer (40:1) by ErikRudec
... you plan to use this as a part of a functional mechanism, use plenty of grease or other lubricant!
drawing with main dimensions:
thingiverse
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3:1 Planetary Geared Extruder
...f bearings
added pinion gear for smaller motor without recess or full length d drive to cater for extended d drine on the pinion.
thingiverse
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Planetary reduction box 6:1 Stepper Motor Nema 23 by lendadomato
...presso em pla ou abs respeitando a orientação do fabricante do filamento.https://youtu.be/rfkwh1hdf3yhttps://youtu.be/ywcpk-sxscu
thingiverse
free
100:1 Compound Planetary Gear Reducer by Gear_Down_For_What
...more cool gearbox projects, don't forget subscribe to gear down for what?! https://www.youtube.com/c/geardownforwhat
thanks!
thingiverse
free
Bevel to Planetary 50:1 reduction by RRamos
...printed bipedal humanoid robot project, don't forget subscribe to stg robotics! https://www.youtube.com/c/richardramosthanks!
thingiverse
free
Nema 17 5:1 Planetary Gearbox by buffcleb
...) as i had these already. the rest of the parts are the same.
you need 1 of each part except the planets, which you need three of
thingiverse
free
11 To 1 Compound Planetary Gearbox by Gear_Down_For_What
...ects and upgrades, don't forget to follow me on thingiverse and subscribe to my youtube channel
gear down for what?
thanks!
thingiverse
free
Compact Planetary Gear Set V1
... winch
this is a compact planetary gear set incorporating 5 planetary gear systems which have a combined gear ratio of 7776 to 1.
thingiverse
free
Planetary extruder by matsuragi
...planetary geared extruder for nema17 motor with 9:46 or 15.1(1) reduction ratio. for better work need use...
thingiverse
free
GAM FP-F-070-016H 16:1 Planetary reducer\gearbox template by niraami
...the gam fp-f-070-016h reducer, not all the features are represented on the model, i generally don't model stuff under ~0.5mm.
thingiverse
free
Nema 17 1:4 Planetary Geared Extruder by ryannining
...nt setting notes.
bearing use 625
for clipping the idler to the body, use metal peg like on the photo, or you can use other clip.
thingiverse
free
Planetary 4:1 DC motor gearbox by 3Daniel3
...stl
1xträger2.stl (use support)
1xdeckel.stl
1xsonnenrad2mm/ sonnenrad3mm (raft adhesion is recommended)
2xm3x30mm screw
2xm3 nut
thingiverse
free
530:1 Planetary Reduction Gearbox for NEMA 14 Stepper Motor by Gtayler
...stages and a .9 degree stepper motor. this gives 110:1 with 0.008 degrees per step. print in nylon or petg for a usable component
thingiverse
free
EXTRUDER Planetary NEMA 17 Mk7 by Gudrimelis
...rangement. screw placement strengthens the gear axles.
1 x bolt m5
1 x pulley mk7
1 x 623zz bearing
2 x 605zz bearing
1 x bolt m3
thingiverse
free
66.46 : 1 Compound Planetary Gearbox for Robotic Arm by Gear_Down_For_What
...cool projects and upgrades, don't forget to follow me on thingiverse and subscribe to my youtube channel
gear down for what?
thingiverse
free
-65.46:1 Compound Planetary Gearbox for Coffee Grinder by H9419
...;. doubled the gripping surface and added a locking mechanism that is modeled after one of the proper attachments of the blender.
thingiverse
free
EMC2 Mini 5:1 Planetary Gearbox with Bearing - For Nema 17! by TwinLizzie
...y be necessary to get the sun gear to fit the shaft.
demo:https://youtu.be/ry7ndbnz7cwhttps://www.youtube.com/watch?v=yutxtrjaoak
thingiverse
free
Gearbug #1 by dustinandrews
...thingiverse a laser cut mechanical toy based off a planetary gear...
thingiverse
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Planetary gears for nema 17 by skmskm
... nema 17 motor.
printed it and added little smaller gear for central gear(if it's not rotating just print it then it should).
thingiverse
free
Gear Bearing
...a tolerance of 0.5mm. bearing1_15thickness.stl : consist of 6 planetary gear & 1 sun gear. bearing2_15thickness.stl : consist of...
thingiverse
free
4.8:1 Nema 17 3d Printed Planetary Gearbox by HodgerTech by DemicDesigns
... anything you want! at 16 micro-steps with a 1.8 deg nema 17 it will be about 400 steps per mm. any questions feel free to ask!!!
thingiverse
free
Higher-ratio evoloid planetary gear 33:1 by tmackay
...ith clearance try adjusting horizontal expansion in your slicer settings or recompile with a different tol value (0.3mm default).
thingiverse
free
planetary gearbox smasher thing
...install them onto the shafts of the 2 gearboxes. 1) put the other 2 drive gears in place and...
thingiverse
free
Dual Ender 3 Pro Z Axis planetary geared mount 4 to 1 by SurgeFF
...er. they will be working 4 times as hard. you can have your cooling setup 100% but unless its water cooled, air cooled wont last.
thingiverse
free
Small multi stage planetary gears by randomgee
...with 50% infill. each gear set uses 2 planets, 1 carrier, 1 ring gear, and 3 washers. 3 washers...
thingiverse
free
Single Planetary Gear System (Components)
...connecting a mere 10 together, the combined ratio is 13,665,866 or 3,665,866 turns of the crank to one turn...
thingiverse
free
Torque Multiplier Planetary gearbox for Nema 17 by naik_sarthak_54
...netary gearbox for nema 17 by naik_sarthak_54
thingiverse
the particular gearbox converts the torque of nema 17 to ratio of 4:1
thingiverse
free
NEMA17 Compound Planetary Gearbox 40:1 ratio by ErikRudec
...educed file size drastically but kept all details on the same resolution (catia stl generation bug caused both of these problems)
thingiverse
free
Planetary Gearbox by zxcvbn
...is more compact and simpler, only needs one bearing 1x12x4mm. might improve the mount after testing. should have a...
thingiverse
free
Compact planetary gearbox by kamikadzyka1
...23 (for any amount of stages you will need only 2 of those)
1 spur_gear_30_teeth
1 motor gear
4 screws
4 nuts (not really needed)
thingiverse
free
Parametric Planetary Gearbox - Openscad by JB86
...size...can be adjusted. openscad files are zipped. more info: https://www.optolab.ftn.uns.ac.rs/index.php/education/project-base/264-planetary-gearbox#&gid=1amp;pid=9 motor driver in video:...
thingiverse
free
Compact Planetary Extruder by mosekaj
...it is mounted to a nema 17 motor. update 1 forgot a file update 2:...
thingiverse
free
PLANETARY EMPIRES INSPIRED LANDSCAPE SET by theguyfromhere
...you can find the full set(2 additional landscpe hexgon, 1 city hexagon, and 1 fortress hexagon) here: https://cults3d.com/en/3d-model/game/planetary-empires-inspired-landscape-full-set please...
thingiverse
free
Planetary Gear Set by paworsk
...planetary gear set by paworsk thingiverse (1 ring gear (1) sun gear (3) planet gears no...
thingiverse
free
Exploded Planetary Gear Set by Thing-O-Fun
...carrier: 3.3:1 carrier to ring: 0.70:1 sun to ring: -2.3:1 ...
thingiverse
free
Fitting Planetary Gear by Nforcer
...make sure you print 3 x planet gears and 1 x sun...
thingiverse
free
Planetary Shuttle by Hellbore01
...a i had for a small space craft. scale is 1:1. it will fit into a 200mm print envelope. let me know if you want the drawing file.
thingiverse
free
Compound Planetary Gear Box (37:1 or 49.3:1) NEMA 17, No Hardware. by Gear_Down_For_What
...get to follow me on thingiverse and subscribe to my youtube channel, gear down for what?https://www.youtube.com/c/geardownforwhat
thingiverse
free
extruder housing for bondtech drivegears by sleepybishop
...a geared 5:1 motor (8mm shaft) like this one: https://www.omc-stepperonline.com/economy-planetarygearbox/nema-17-stepper-motor-bipolar-l60mm-w-gear-raio-51-planetary-gearbox-17hs24-2104s-pg5.html ...
thingiverse
free
Planetary Bearing by GordonInnovations
...1/4" square center post, approx. 1.38" (35mm) outer diameter, 12" ...
thingiverse
free
High Torque 149.33:1 Compound Planetary Gear set by Gear_Down_For_What
...cool projects and upgrades, don't forget to follow me on thingiverse and subscribe to my youtube channel
gear down for what?
thingiverse
free
Simple Planetary Gears by jonducrou
...gives 1:6. with a fixed planet carrier, this gives 15. ...
thingiverse
free
Compound Planetary Gearbox (38.75:1 or 50.4) No Bearings, No Hardware! by Gear_Down_For_What
...un gear and d-shaft before installing it.
always insert the gear set into the housing with the d-shaft sun gear facing the motor.
thingiverse
free
Nema 11 Planetary Gear Box, parametric, stackable by WG73
...or my bad english)
it's working :-) video
on right side front mount with one stack
on left side back mount with two stack
thingiverse
free
Parametric planetary gear by odino
...about 3.5 and 3.14, for a final ratio of 1.99:1 ...
thingiverse
free
43.33:1 Compound Planetary Gearset, NEMA 17 Mount, No Hardware by Gear_Down_For_What
...cool projects and upgrades, don't forget to follow me on thingiverse and subscribe to my youtube channel
gear down for what?
thingiverse
free
43.3:1 Compound Planetary Gearbox For Robotic Arm Project! by Gear_Down_For_What
...cool projects and upgrades, don't forget to follow me on thingiverse and subscribe to my youtube channel
gear down for what?
thingiverse
free
Planetary gear overdrive drill adapter by 27v0XjvQTTuRUaX6xw
...with like 1000 rpm you will end up with 1.000 rpm! note that this only fits on 200% scale...
thingiverse
free
Nema 17 Stepper 5:1 Planetary Gearbox with 5mm shaft for GT2 pulley by stanoba
...m5x30 1pcs (shaft)
m5 self locking nuts 1pcs (shaft)
695zz ball bearing 2pcs (shaft)
683zz ball bearing 6pcs (planets, 2pcs each)
thingiverse
free
EMC2 Gen 2 - Zero-Backlash Herringbone Planetary (66:1) by TwinLizzie
...he gear ratio.. simply swap out the planet and ring gears (for a few cents each) without having to print everything from scratch!
3dbaza
$3
Planetary Chandelier (199989)
...048<br>xform: no<br>box trick: no<br>model parts: 1<br>render: <br>formats: 3ds max 2013, obj, 3ds
thingiverse
free
High Torque 160:1 Compound Planetary Gearbox by Gear_Down_For_What
... an affiliate advertising program designed to provide a means for us to earn fees by linking to amazon.com and affiliated sites.
thingiverse
free
Geared Bipolar Stepper Motor Mount by HeavyOsmium
...233 oz-in geared bipolar stepper motor with attached integrated planetary gearbox with a 52/11 :1...
thingiverse
free
Differential Planetary Gearset by emmett
...reduction in a small package: this drive gives a 911 gear ratio. it's much more convenient to print than...
3dbaza
$3
PLANETARY Rings Pendant (142162)
... 728<br>xform: no<br>box trick: no<br>model parts: 1<br>render: v-ray<br>formats: 3ds max 2013, obj
thingiverse
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Nema 17 Stepper 5:1 Planetary Reducer by jag
...underside of the cover to clear the screws in the carrier.
5/25/2011 uploaded separate stls and modified involute_gears library
thingiverse
free
Planetary Gear System by trevorhenningson
...print qty. 4 of each outer gear and qty. 1 of every other part it's a cool mechanism and...
thingiverse
free
Compact planetary gearbox by Trigubovich
...for mounting boxing thickness v1 - 12mm, v2 - 1mm all parts are separated your slicer successfully divide into...
thingiverse
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Planetary gearbox for bowden extruder by Trigubovich
...or v3 testinghttps://www.youtube.com/watch?v=olyg4v9usvu added front bearing cover bearing size: 1x5x5 working...
thingiverse
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Nema 17 planetary gearbox reductor 1:3 - Fusion360 files by marc by marcglesser
...rnal gear.
https://apps.autodesk.com/fusion/en/detail/index?id=6294804001663532834&applang=en&os=win64&autostart=true
thingiverse
free
A2212 Brushless Planet Gear by UsernameSign
...a2212 brushless planet gear by usernamesign thingiverse stackable planetary gear for a2212 motor with 4:1 ratio per stack....
thingiverse
free
Saturn Extruder - A compact 3mm planetary geared bowden extruder by alexspeller
...this compact, planetary geared bowden extruder with a roughly 5:1 gear ratio (similar to a wade extruder) but far...
thingiverse
free
Planetary Gearbox Clock by syvwlch
...tabs for the cage i took from relet's excellent http://www.thingiverse.com/thing:621 . the intent was to do away with concentric...
thingiverse
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20:1 Planetary Gearset Servo Drive InMoov Hip Joint by mayaway
...tch, cover-36mm v2.stl and hipplanetmount_sq.stl
to tighten up the backlash even more i've scaled the planet gears 4% larger.
thingiverse
free
Planetary gearbox extruder 1.75mm by Lehaiver
...ver has a placement for the dust filter sponge.
mendel mounting plate model (not tested): http://www.thingiverse.com/thing:511681
thingiverse
free
NEMA23 planetary gearbox with an encoder mount, 3.333 gear reduction ratio by ErikRudec
...1:3.333; ring teeth: 63 sun teeth: 27 planet teeth: 1 in addition to included files you will need an...
thingiverse
free
![The Planetary Dynamo-kit! [DCmotor, LED and all print: no extra screws needed] by marius1991](/t/8997193.jpg)
The Planetary Dynamo-kit! [DCmotor, LED and all print: no extra screws needed] by marius1991
...n as it's converted from motion to electricity to light!
see a video of the dynamo-assembly here: http://vimeo.com/90758485
thingiverse
free
Exoplanets sizes: TRAPPIST-1 versus the Solar System by peridot_faceted
...generates models of the star and planets in a planetary system; i've used it to generate models for our...
thingiverse
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Nema 23 planetary gearbox by Jacorna
...3 exterior layers for strength. you will also need 1 m4 screw without head, 3 short m5 with nuts,...
thingiverse
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Planetary Fan Module for Brabeast by Gyrobot
...me snigger) gear which achieves a very high reduction (86.4:1 a video of this :http://youtu.be/pdvfl4gfmk0http://youtu.be/vujeq_0beqg...
thingiverse
free
Planetary Gear Box for Small Stepper Motor by QwykSylver
...degree per step motor and turns it into a 18 degree per step. i have a ton of small...
thingiverse
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Planetary Gears (Stackable, 100% printable, snap together) by pcgear
...5th module: 6563.6 / 1
https://www.youtube.com/watch?v=ejjmn9aqap0&t=13shttps://www.youtube.com/watch?v=doptxh0gk_u&t=15s
thingiverse
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Rubik's planetary gear puzzle by faggahz
...then expected ... print 1 each. print 3 of planet1 and planet4 drill holes 3mm in planets and sun...
thingiverse
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Planetary Fidget Spinner by BlueChromis
...as an additional pin in the near future. update 1 the cap on my spinner started falling off after...
thingiverse
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Planetary Missile Defense Turret - Tabletop Gaming - The Ignis Quadrant by ecaroth
...you can see from the scale compared to a 1quot; based mini in the pic above, this is a...
thingiverse
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Large 3 stage planetary gearbox by mcentric
...true. the correct ratio is 3.33:1 pr. stage and 37:1 at the output shaft. i designed it to show...
thingiverse
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Clodbuster Planetary Cover by shadowfocus603
...axle nut assuming you are running axle nuts like these:https://www.ebay.com/itm/metal-nuts-for-110-rc-scx10-wraith-12mm-wheel-hub-hex-drive-adaptor-25mm-offset/402385094448?sspagename=strk%3amebidx%3ait&_trksid=p2057872.m2749.l2649 ...
thingiverse
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Planetary Gear Piston by Spenc
...ill post some next time i print it again. 5/06/201 vertices fixed ! also shortened the crankshaft so that...