Reference
A standard library of 100+ parametric maker parts — insert, size, mate and re-use.
FlywheelCAD ships a standard library of everyday mechanical and electronic parts — fasteners, bearings, gears, motors, connectors, board footprints and mounts. Every part is a parametric component: pick it from a browser, choose a size, and it drops into your design ready to position and mate. Dimensions trace to a published standard or a common catalog part, so a bolt circle or a bearing bore is the real one.
FlywheelCAD's standard parts are parametric reconstructions from published engineering standards (ISO/DIN/ANSI); dimensions are factual specifications, not data reproduced from any vendor's catalog.
| Insert from a browser | Component → Insert from Library… opens a searchable browser with a live 3D preview. Enumerated parameters (size, thread, designation…) appear as drop-downs; lengths and diameters are free-entry. Press insert and the part is placed as a component instance. |
| Copy-on-use |
Inserting a part vendors its module into your document under lib/standard/,
so the document stays self-contained and travels with exactly the parts it uses. In a script the
same part is just an import: from lib.standard.bearings import bearing.
|
| Named anchors |
Each part exposes named reference points — a stepper's mount_face and
bolt_0..3, a bearing's face_a. Mate to them
(cad.mate_coincident(part, "face_a", plate.hole_0)) and the part follows when the
target moves.
|
| Parametric & memoized |
Ask for an M3×12 and an M4×20 and you get two components; ask for a size you already
used and it is reused, not rebuilt. Every factory also takes a quality preset
(preview / standard / high / ultra) controlling mesh resolution.
|
cad first, then its parameters, and
returns a component you instance. The tables below list every factory and its parameters
(drop-down choices are shown inline).
from flywheelcad import *
cad = FlywheelCAD()
from lib.standard.bearings import bearing
from lib.standard.fasteners import cap_screw
b = bearing(cad, designation="608") # a component
brg = cad.instance(b, translate=(0, 0, 0)) # placed in the assembly
screw = cad.instance(cap_screw(cad, thread="M3", length=10))Motors, bearings, gears, belts, springs and the linkages that tie them together.
steppers 1 partNEMA stepper motors (square & round bodies)
| Factory | What it is | Parameters |
|---|---|---|
stepper | A NEMA stepper motor with catalog-style detailing. | size 8 · 11 · 14 · 17 · 23 · 34length optionalshaft_length optionalbody square · round |
servos 2 partsHobby servos and matching control horns
| Factory | What it is | Parameters |
|---|---|---|
servo | A hobby servo: case, mounting flange with screw holes, gear-head | size sub_micro · micro · standard · large |
horn | A servo control horn (arm) with linkage holes. | style single · double · cross · discspline micro · standard · largelength optional |
bearings 1 partDeep-groove ball bearings (ISO 15), plain and flanged
| Factory | What it is | Parameters |
|---|---|---|
bearing | A deep-groove ball bearing (see module docstring for designations). | designation 623 · 624 · 625 · 626 · 608 · 688 · 6000 · 6001 · 6800 · 6801 · 6900 · 6902flanged (False) |
bearings_more 4 partsThrust, sleeve, needle and 2-bolt flange bearings
| Factory | What it is | Parameters |
|---|---|---|
thrust_bearing | A single-direction thrust ball bearing: one continuous annular ring | designation 51100 · 51101 · 51102 · 51103 |
bushing | A sleeve/sintered-bronze bushing: an annular tube, axis +Z, z=0..length. | bore (8.0)od (10.0)length (10.0)style plain · flanged |
needle_bearing | A drawn-cup needle roller bearing: a thin-wall annular shell, axis | designation HK0608 · HK0810 · HK1010 · HK1210 |
flange_bearing | A 2-bolt diamond-flange mounted bearing unit (KFL series): a | size KFL08 · KFL10 |
motion 5 partsLM linear bearings, GT2 pulleys, lead screws and couplings
| Factory | What it is | Parameters |
|---|---|---|
lm_bearing | An LM____UU linear ball bearing: an annular tube with a shallow | model LM6UU · LM8UU · LM10UU · LM12UU |
gt2_pulley | A GT2 (2 mm pitch) timing pulley: two flange disks around a central | teeth (20)bore (5.0) |
leadscrew | A trapezoidal lead screw at its nominal major diameter. Axis +Z. | size TR8x2 · TR8x8 · TR10x2 · TR12x3length (200.0)threads cosmetic · real |
leadscrew_nut | A brass flanged lead-screw nut: a flanged, through-bored cylinder | size TR8 · TR10 · TR12 |
shaft_coupling | An aluminium shaft coupling: outer Ø 25, length 30, with a stepped | style rigid · flexiblebore_a (5.0)bore_b (8.0) |
transmission 6 partsRoller-chain sprockets, V-belt/idler pulleys, belts, worms
| Factory | What it is | Parameters |
|---|---|---|
sprocket | A roller-chain sprocket: a flat disc (thickness 4) at the chain's | teeth (16)chain #25 · #35 · #40bore (8.0) |
v_pulley | A V-belt pulley: an annular disc (width 12) with a single-V groove | od (40.0)bore (8.0) |
idler_pulley | A smooth belt idler/tensioner wheel: two flange lips (dia od+3) | od (18.0)bore (3.0) |
timing_belt | A GT2 timing-belt loop shown as a thin closed racetrack band (teeth | length (200.0)width (6.0) |
worm | A worm-drive worm: a plain cylindrical blank (dia od, `length`) with | length (30.0)od (12.0)bore (6.0) |
belt_clamp | A GT2 belt clamp: the toothed block that grips a timing belt's end and | belt_width (6.0)teeth (6) |
gears 3 partsInvolute spur and helical gears, plus a matching rack
| Factory | What it is | Parameters |
|---|---|---|
spur_gear | An involute spur gear. teeth (>=8), module (mm), thickness (face width), | teeth (20)module (2.0)thickness (6.0)bore (5.0)pressure_angle 14.5 · 20.0 · 25.0 |
helical_gear | An involute helical gear: the spur profile swept along a helix via the | teeth (20)module (2.0)thickness (8.0)bore (5.0)helix_angle (20.0)hand right · leftpressure_angle 14.5 · 20.0 · 25.0 |
gear_rack | A straight involute-equivalent gear rack (the tooth strip a spur gear | teeth (12)module (2.0)thickness (8.0) |
springs 3 partsCompression, extension and torsion springs
| Factory | What it is | Parameters |
|---|---|---|
compression_spring | A helical compression spring. | coils (6)wire_d (1.5)outer_d (12.0)free_length (25.0)ends (closed) |
extension_spring | A helical extension spring: close-wound body coils plus a loop at each | coils (8)wire_d (1.2)outer_d (10.0) |
torsion_spring | A helical torsion spring: body coils plus two tangential legs. | coils (5)wire_d (1.5)outer_d (12.0)leg_length (20.0)leg_angle (90.0) |
linear_motion 5 partsBall screws, turntable bearings, cam followers, gearmotors
| Factory | What it is | Parameters |
|---|---|---|
ball_screw | A ball screw shaft at its nominal major diameter (thread cosmetic -- | size SFU1204 · SFU1605 · SFU2005length (200.0) |
turntable_bearing | A lazy-susan / slewing turntable bearing, represented as a short | size 100mm · 150mm |
cam_follower | A cam follower / track roller: a threaded stud (dia `bore`, 12mm | bore (6.0)roller_d (16.0) |
encoder_wheel | An optical encoder disc: a thin disc (dia `od`, 1.5mm thick, bored | slots (20)od (40.0)bore (5.0) |
dc_gearmotor | A small DC gear motor: a gearbox (rectangular for N20, round for | size N20 · 37D |
linkage 3 partsRC ball links, clevises and pushrods
| Factory | What it is | Parameters |
|---|---|---|
ball_link | A ball link (rod end): threaded shank into a housing that swivels | thread M2 · M3 |
clevis | A clevis (fork) link: threaded shank into a forked end with a | thread M2 · M3 |
pushrod | A plain pushrod (threaded ends implied). Runs z = 0 → length. | diameter (2.0)length (80.0) |
shafting 4 partsShafts with plain/chamfered ends, shaft collars, keys and thrust washers
| Factory | What it is | Parameters |
|---|---|---|
shaft | A plain round shaft. `end="chamfered"` breaks both ends with a 45 deg | diameter (8.0)length (100.0)end plain · chamfered |
shaft_collar | A set-screw shaft collar: a ring clamped to a shaft to locate a part | bore (8.0)style solid · split |
key | A parallel key blank (DIN 6885 A, square ends), sized from the shaft | shaft_d (8.0)length (20.0) |
thrust_washer | A plain thrust/shim washer for a shaft: a flat annulus, bronze-coloured | bore (8.0) |
Metric fasteners traceable to ISO / DIN standards, plus the negative bodies that cut their holes.
fasteners 5 partsCap screws, hex nuts, washers and clearance/tap hole-cutters
| Factory | What it is | Parameters |
|---|---|---|
cap_screw | A DIN 912 socket head cap screw. | thread M2 · M2.5 · M3 · M4 · M5 · M6 · M8length (12.0)threads cosmetic · real |
hex_nut | An ISO 4032 hex nut. Anchors: bottom (z=0), top. Flats face ±Y. | thread M2 · M2.5 · M3 · M4 · M5 · M6 · M8threads cosmetic · real |
washer | An ISO 7089 flat washer. Anchors: bottom (z=0), top. | thread M2 · M2.5 · M3 · M4 · M5 · M6 · M8 |
clearance | NEGATIVE body: an ISO 273 medium-fit clearance volume to subtract. | thread M2 · M2.5 · M3 · M4 · M5 · M6 · M8length (12.0)head_pocket (False) |
tap | NEGATIVE body: a tap-drill volume (for threads cut into the part). | thread M2 · M2.5 · M3 · M4 · M5 · M6 · M8length (10.0) |
fasteners_more 6 partsCountersunk / button / grub screws, heat-set inserts, standoffs, threaded rod
| Factory | What it is | Parameters |
|---|---|---|
countersunk | An ISO 10642 flat (countersunk) socket-head screw. | thread M2 · M2.5 · M3 · M4 · M5 · M6 · M8length (12.0)threads cosmetic · real |
button_head | An ISO 7380 button (dome) head socket screw. | thread M2 · M2.5 · M3 · M4 · M5 · M6 · M8length (12.0)threads cosmetic · real |
grub_screw | An ISO 4026 socket set (grub) screw: a headless threaded cylinder with | thread M2 · M2.5 · M3 · M4 · M5 · M6 · M8length (6.0)threads cosmetic · real |
heatset_insert | A tapered brass heat-set threaded insert (press-in, for 3D prints). | thread M2 · M2.5 · M3 · M4 · M5 |
standoff | A hex brass standoff. Anchors: base (z=0), top (z=length); a male-female | thread M2 · M2.5 · M3 · M4 · M5length (15.0)gender female-female · male-female |
threaded_rod | Threaded rod / studding at the nominal major diameter. Stands up +Z. | thread M2 · M2.5 · M3 · M4 · M5 · M6 · M8length (60.0)threads cosmetic · real |
fasteners_hardware 5 partsFlange & acorn nuts, rivnuts, shoulder screws, lock washers
| Factory | What it is | Parameters |
|---|---|---|
flange_nut | An ISO 4161 serrated hex flange nut (serrations cosmetic). | thread M4 · M5 · M6 · M8 · M10threads cosmetic · real |
acorn_nut | A DIN 1587 domed acorn (cap) nut: a blind-bored hex base capped by a | thread M4 · M5 · M6 · M8 · M10threads cosmetic · real |
rivnut | A blind rivet-nut / threaded insert: a flange disc atop a knurled | thread M4 · M5 · M6 · M8 · M10 |
shoulder_screw | An ISO 7379 shoulder (stripper) screw: a precision shoulder followed | shoulder_d 6 · 8 · 10 · 12length (20.0) |
lock_washer | A lock washer: "split" (DIN 127 spring ring, approximated as an | thread M3 · M4 · M5 · M6 · M8 · M10style split · external_tooth · internal_tooth |
fasteners_pins 6 partsDowel / spring / clevis / cotter pins, E-clips, retaining rings
| Factory | What it is | Parameters |
|---|---|---|
dowel_pin | An ISO 2338 hardened dowel pin (h8 tolerance): a plain cylinder with | diameter (5.0)length (16.0) |
spring_pin | An ISO 8752 slotted spring (roll) pin: a rolled tube (wall ~0.12 x | diameter (4.0)length (20.0) |
e_clip | A DIN 6799 E-clip (external retaining ring): a flat annulus sized for | shaft (6.0) |
retaining_ring | A DIN 471 (external, sprung onto a shaft) / DIN 472 (internal, | bore (20.0)kind internal · external |
clevis_pin | An ISO 2341 clevis pin: a cylindrical shank with a flat head at one | diameter (5.0)length (20.0) |
cotter_pin | An ISO 1234 / DIN 94 split (cotter) pin, simplified as a single | diameter (3.2)length (40.0) |
fasteners_rigging 6 partsEye & U-bolts, thumb / self-tapping screws, wing & coupling nuts
| Factory | What it is | Parameters |
|---|---|---|
eye_bolt | A DIN 444-style lifting eye bolt: a threaded shank topped by a round | thread M4 · M5 · M6 · M8 · M10threads (cosmetic) |
u_bolt | A U-bolt: two vertical threaded legs joined by a semicircular bend. | thread M4 · M5 · M6 · M8 · M10width (30.0)height (50.0)threads (cosmetic) |
thumb_screw | A knurled thumb screw (hand-tightening fastener): a flat knurled | thread M3 · M4 · M5 · M6 · M8length (12.0)threads cosmetic · real |
coupling_nut | A long coupling nut (DIN 6334-style): a hex prism with a through | thread M4 · M5 · M6 · M8 · M10threads cosmetic · real |
wing_nut | A wing nut (DIN 315-style butterfly nut): a bored cylindrical body | thread M4 · M5 · M6 · M8 · M10threads cosmetic · real |
self_tapping_screw | A self-tapping / wood screw: a flat head flush at z = 0, tapering | diameter (4.0)length (16.0)threads cosmetic · real |
Through-hole parts, connectors, breakout-board footprints and panel controls to design cases around.
electronics 5 partsLEDs, tactile buttons, 0.1" headers, barrel jacks, cooling fans
| Factory | What it is | Parameters |
|---|---|---|
led | A through-hole LED. size: "3mm" or "5mm". | size 3mm · 5mm |
tact_button | A tactile push button. size: "6mm" or "12mm". | size 6mm · 12mm |
header | A 0.1" (2.54mm pitch) pin header. pins: count per row (free text); | pins (4)rows 1 · 2 |
barrel_jack | A PCB-mount DC barrel jack (5.5x2.1mm class). | — |
fan | A square cooling fan. size: "40mm", "60mm", "80mm", or "120mm". | size 40mm · 60mm · 80mm · 120mm |
electronics_more 5 partsBuzzers, heat sinks, fuse holders, LED matrices, Pi HATs
| Factory | What it is | Parameters |
|---|---|---|
buzzer | A through-hole piezo buzzer can (see module docstring for dims). | kind active · passive |
heat_sink | An extruded aluminium heat sink (see module docstring for dims). | style TO220 · RPi |
fuse_holder | A panel/PCB fuse-clip holder for a 5x20 mm fuse (see module | — |
led_matrix | An LED matrix / display module (see module docstring for dims). | size 8x8 · MAX7219 |
rpi_hat | A Raspberry Pi HAT/shield footprint board (see module docstring | — |
connectors 5 partsUSB, JST, Dupont, screw terminal blocks, panel jacks
| Factory | What it is | Parameters |
|---|---|---|
usb | A USB receptacle shell: an outer metal shell block minus a mouth | kind A · C · micro |
jst | A JST-XH style 2.5mm-pitch wire-to-board header. White nylon housing | pins (2) |
dupont | A Dupont/"berg" 2.54mm female housing: black nylon shell | pins (1)rows 1 · 2 |
terminal_block | A screw terminal block, 5.08mm pitch: green body (5.08*ways) long x | ways (2) |
barrel_jack_panel | A panel-mount DC barrel jack, simplified as an on-axis (+Z) stack: a | — |
modules 5 partsOLED, stepper-driver, buck-converter and battery-holder boards
| Factory | What it is | Parameters |
|---|---|---|
oled_display | A small OLED display breakout module. | size 0.96 · 1.3 |
relay_module | A multi-channel relay breakout board (generic Songle SRD-05VDC-SL-C | channels (1) |
stepper_driver | An A4988/DRV8825-class stepper driver carrier board (Pololu-style | kind A4988 · DRV8825 |
buck_converter | A mini buck (step-down) converter module (MP1584EN-class). PCB | — |
battery_holder | A battery holder. cell "18650": box (count*19.5 + 3) x 72 x 20 mm | cell AA · 18650 · CR2032count (1) |
board_footprints 5 partsArduino, Raspberry Pi and ESP32 board footprints
| Factory | What it is | Parameters |
|---|---|---|
arduino_uno | An Arduino Uno R3-footprint board: PCB outline, the 4 real mounting | — |
arduino_nano | An Arduino Nano-footprint board: PCB outline, 4 corner mounting | — |
raspberry_pi | A Raspberry Pi-footprint board: PCB outline, the 4 real mounting | model 3B · 4B · Zero |
esp32_devkit | An ESP32 DevKit-footprint board: PCB outline, two 15-pin header | — |
pcb_standoff | A nylon PCB support/board-mount spacer: a round spacer body (dia | height (6.0) |
switches 5 partsRocker / toggle / slide switches, potentiometers, rotary encoders
| Factory | What it is | Parameters |
|---|---|---|
rocker_switch | A KCD1-class panel rocker switch (21x15mm cutout). | — |
toggle_switch | A mini toggle switch (MTS-101 class). | — |
slide_switch | An SPDT slide switch. | — |
potentiometer | A WH148 / Alpha-class 9mm panel potentiometer. | shaft round · d_flat · knurled |
rotary_encoder | An EC11-class rotary encoder with pushbutton. | — |
enclosure 4 partsDIN rail, draw latches, bar handles and vent grilles
| Factory | What it is | Parameters |
|---|---|---|
din_rail | A TS35 top-hat DIN rail (EN 60715): the 35 mm hat section every | length (150.0)size TS35 |
draw_latch | A draw (toggle) latch: the base plate that screws to the enclosure and | size (60.0) |
handle | A U-shaped pull handle: two feet and a round bar between them. | span (120.0)height (32.0)bar_d (12.0) |
vent_grille | A ventilation panel: a plate with a louvre pattern cut through, for | width (60.0)height (40.0)pattern slots · grid |
Framing, magnets, pneumatics and the brackets that bolt everything down.
extrusions 1 partT-slot aluminium extrusion rails (20/30/40 series)
| Factory | What it is | Parameters |
|---|---|---|
rail | A T-slot extrusion rail. | profile 2020 · 2040 · 4020 · 2060 · 3030 · 3060 · 4040 · 4080length (100.0) |
framing 4 partsT-slot nuts, corner brackets, angle plates and end caps for those rails
| Factory | What it is | Parameters |
|---|---|---|
t_slot_nut | A T-slot nut: the sliding block that drops into a rail slot and takes a | size (20)thread optionalstyle (tee) |
corner_bracket | An L bracket joining two rails at 90 deg: two arms, each with a | size (20)thickness optionalgusset (True) |
angle_plate | A flat joining plate (straight, not cornered): a strip with a row of | size (20)holes (2)thickness optional |
end_cap | A moulded end cap that closes a rail's open end: a plate the size of the | size (2020)thickness (2.5) |
mounts 5 partsVESA plates, tripod bosses, caster wheels, piano hinges, cable clips
| Factory | What it is | Parameters |
|---|---|---|
vesa_mount | A VESA (FDMI) monitor-mount adapter plate: a square plate with a | pattern 75 · 100 · 200 |
tripod_mount | A 1/4"-20 camera/tripod mounting boss: a 30x30x4mm backing plate | — |
caster_wheel | A V-groove skate/V-slot caster wheel: an annular revolve with a | diameter (24.0)bore (8.0) |
piano_hinge | A continuous ("piano") hinge: two flat leaves (each 15mm wide x | length (100.0) |
cable_clip | A cable saddle / P-clip: a block (width cable_d+8, depth cable_d+4, | cable_d (6.0) |
magnets_misc 3 partsNeodymium magnets, rubber feet, panel grommets
| Factory | What it is | Parameters |
|---|---|---|
magnet | A neodymium magnet. shape: "disc" (solid cyl), "ring" (annular, uses | shape disc · ring · blockdiameter (10.0)bore (0.0)thickness (3.0) |
rubber_foot | A rubber bumper foot: a truncated cone with a central screw through-hole. | size small · medium · large |
grommet | A rubber panel grommet (spool): flanges grip a panel of `thickness` | panel_bore (8.0)thickness (1.5) |
pneumatics 5 partsPush-fit bowden fittings, hose barbs, O-rings, cable glands
| Factory | What it is | Parameters |
|---|---|---|
pneumatic_fitting | A PC-series push-to-connect bowden fitting: threaded base (-Z) + hex | size PC4-M6 · PC4-M10 · PC6-M6 |
bowden_coupler | An inline PC4-class tube-to-tube coupler: two collet bodies back to | tube_od (4.0) |
hose_barb | A barbed hose-to-thread adapter: threaded base (-Z) + hex + a barbed | hose_id (6.0)thread M6 · M8 · G1_4 |
o_ring | An elastomer O-ring: a torus (AS568/ISO 3601 sizing convention — | inner_d (10.0)cross_d (2.0) |
cable_gland | A metric/PG-thread cable gland: threaded body (-Z) + hex + a domed | size M12 · M16 · PG7 · PG9 |