3D-printable automotive, RC & hobby parts
Car inserts, RC bumpers, slot-car bodies, drone guards and hobby parts with real dimensions. Browse what makers built, or describe the exact part you need and Printy makes it.
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A heavy-duty rear kicktail platform designed for the Escoone W6 electric scooter. Features a solid, uninterrupted core for maximum strength, adjustable bolt spacing for the 114.3mm factory mounts, and a steep ramp angle to lock in the rear foot during hard acceleration. 105mm bottom arch to clear the rear fender Solid center spine for FDM printability Recessed bolt mounts to keep the deck flat High-traction chevron cuts for grip
Tabletop Cornhole Deck
A desktop-scale modular cornhole kit scaled to a 175mm deck length, complete with a print-in-place flexure bag that collapses to clear the main bore. The deck prints upside down (or flat) to avoid supports inside the main cavity, while the folding leg frame snaps securely into the 4.2mm frame hinges. Fitment notes Bore Size: 24mm diameter target hole. Bag Size: 21x21mm overall, connected by 0.4mm thick living-hinge webs. Leg Hinge: 4.2mm deck bore, 3.5mm pins on the leg frame — expects a firm flex to seat.
Squircle Hyperbolic Acoustic Horn
A bespoke acoustic horn designed to couple directly with 1-3/8" threaded compression drivers, engineered for high-efficiency hyperbolic loading down to 1200Hz. The internal acoustic path executes a mathematically rigorous transition from a 35mm circular throat to a 194x134mm superelliptical (squircle) mouth, maintaining exact expansion rates without stepping or transitional artifacts. Acoustic & Mechanical Geometry Expansion Profile: Hyperbolic (m = 0.45, k = 3.0), optimized for maximum acoustic impedance matching in a compact depth. Throat Integration: Built-in 1-3/8"-18 TPI female thread mounts standard pro-audio drivers directly, with the acoustic flare beginning exactly at the thread boundary to eliminate internal turbulence steps. Surface Topography: Generated as a single continuous geometric mesh to ensure a completely smooth fluid path from driver to mouth. Mounting Setup: Sized at 210x150mm to clear standard 220mm print beds, featuring countersunk M4 clearance holes spaced at 186x126mm.
Snap-Fit Assembly Racing Car
A 7-piece flat-pack assembly car. The chassis is a solid block with a hollowed pillar cabin and deeply recessed wheel wells, keeping the 22mm wheels tightly tucked. The axles press-fit into the wheels while spinning freely through the body. Remixing and clearances The critical dimensions are simple to tweak if you want to swap styles or tune the fit: Axle clearance: The axles are 5.0mm diameter, press-fitting into 5.15mm holes in the wheels. If your printer over-extrudes, scale the axles down by a fraction of a percent. Body spin: The chassis holes are 6.5mm, giving a loose, friction-free spin. Wheel wells: Currently 28mm diameter cutters for a 22mm wheel. You can size the wheels up to 25mm before they start rubbing the chassis. Stance: The axles are 38mm long. The chassis spans 30mm, leaving exactly 4mm on each side for the wheels to sit flush in their wells.
Tactical Shock-Cord MOLLE Panel
A robust 3D-printable MOLLE/PALS panel engineered to organize and mount your gear securely. Featuring standard webbing slots and an integrated shock cord routing system, it easily adapts to a variety of storage needs—from backpacks and vehicles to custom workshop setups. Standard PALS Spacing: Accommodates traditional MOLLE pouches and accessories. Integrated Shock Cord Holes: Strategically placed along the grid intersections and outer borders for weaving custom retention setups. Offset Standoffs: Built-in 3/4" rear spacers at the four corner mounts allow room for straps and webbing without additional hardware. Rugged Build: 4mm thick solid plate designed for rigid mounting.
Custom Solid School Bus
A miniature school bus scaled to exactly 120 mm in overall length, proportioned realistically for print-in-place FDM printing. Features include recessed windows to preserve a watertight manifold body, integrated fenders, and robust side mirrors that won't snap when the supports pull away. Dedicated Sign Panels: Extruded flat blanks on the sides carry the requested school name on two clear lines. Exact Dimensional Fit: The front and rear bumpers are anchored dead on the 120 mm boundaries. Printability: The entire base is sliced flat at Z=0, guaranteeing solid bed adhesion without rafts.
Faceted SimHub Button Box
A clean, industrial-styled button box designed for sim racing rigs, controlling Wind, Pedals, and Bass Shakers via SimHub. The enclosure uses a faceted, dodecahedron-inspired geometry to eliminate flat overhangs and keep the footprint small. The front panel cuts a heavy 45° chamfer, hiding the seam where it snaps into the rear body. Features internal snap-fit prongs and receiver towers — no visible hardware required. Base dimensions reduce sharply toward the mount to avoid interfering with wheelbases or monitor arms. Built with clearances for standard Cherry MX switches and a toggle switch cut out for the top left.
Classic Block School Bus
A solid, 3D-printable school bus styled specifically for direct FDM printing. The entire chassis, wheels, and bumper bases share a completely flat Z=0 plane for excellent bed adhesion. Support-Free Windows: Modeled as deep structural recesses rather than complete cutouts, preserving the strong solid core of the model. Embossed Lettering: Thick 1.5mm 3D lettering cleanly fused to the hull. Support-Free Mirrors: The side mirrors feature a smooth 45-degree brace underneath, eliminating the need for delicate breakaway supports. 120mm Scale: Exactly 120mm bumper-to-bumper.
School Bus with Flat Chassis
Most printed vehicles fail because the wheels are left hanging on fragile pegs or the chassis sits at an odd angle that demands heavy scaffolding. This model fixes that. The chassis and the tires all bottom out exactly at zero, so the whole block sits dead flat on the build plate. The wheels are deeply anchored into the body via solid internal axles — no snap-offs, no thin joints, and absolutely zero internal voids to confuse the slicer. Print details Dimensions: 120 mm total length, 45 mm wide (at the wheels), 50 mm tall. Wall thickness: Core is completely solid; window recesses leave a 36 mm thick central pillar. Overhangs: Window frames drop in by 1 mm, wheel arches span smoothly, and mirrors sit flush. No supports needed.
BlockBus — Solid FDM Chassis
This is a heavy-duty, monolithic school bus model engineered specifically for FDM printers like the K1 Max. Instead of a fragile hollow shell, the body is a continuous solid block. The details — including the windows, grille, and doors — are debossed just 1mm deep, providing all the visual definition without introducing internal overhangs or requiring support material. Dimensions Length: Exactly 120 mm (from front to rear bumper) Width: 44 mm (outer wheel edge to wheel edge) Height: 42 mm (including the roof hatches) Print Notes Support-Free: Designed to be printed entirely without supports. The debossed windows bridge easily, and the wheel overhangs are minimal. Bed Adhesion: The bottom 0.4 mm of the model (including the wheels) is sliced perfectly flat, yielding a wide contact patch for a flawless first layer. Infill: Since the core is fully solid, use your slicer's infill (10-15% is usually plenty) to control the final weight of the part.
AuraZex Support Legs
The torso had no base and tipped over the second a cable was bumped. I machined this pair of modular legs to give it a stance. They bolt directly to the 150mm underside spacing of the AuraZex frame, bearing the weight on overlapping 12.5mm pin joints instead of fragile ball-sockets. Mechanical Specifications Leg span: 150mm total width, staying flush with the torso edges. Stand height: 165mm from the floor to the torso mounting plates. Routing: 20x26mm central channels clear right through the internal structure for future wiring runs.
Zip-Tie Bike Can Holder
A lightweight, rigid drink holder built for a standard 66mm soda or beer can. Rather than chasing an exact clamp fit for one specific handlebar diameter, it mounts using heavy-duty zip ties and an intersecting V-groove block. This geometry lets it lock tightly against round bars, odd-shaped commuter handlebars, or vertical stems without needing extra hardware. The arched front window trims weight while ensuring the overhang prints cleanly without supports. Remixing the Mount The geometry here is built to be easily modded depending on what you're tying it to: Inner Diameter: Currently 68mm to leave a 1mm gap around a bare standard can. Expand this to 75mm+ if you run a koozie. Zip Tie Slots: Generously sized at 6.5x3.5mm to pass standard or heavy-duty ties. V-Grooves: Both horizontal and vertical grooves share the same depth. If you're mounting to an unusually thick e-bike frame, deepen the V so the side walls still make solid contact.
W201 US-Spec Headlight Bracket
Inner bulb bracket patterned for Mercedes-Benz W201 (190E) US-spec headlight assemblies. This unit replaces cracked or heat-warped originals, seating directly into the outer housing and carrying the inner bulb contour. Fitment Measurements Overall Footprint: 105.0 mm wide × 185.0 mm tall Top Mounting Centers: 68.0 mm apart (4.5 mm bore) Bottom Mounting Centers: 72.0 mm apart (4.5 mm bore) Frame Depth: 12.0 mm Check your specific housing style before printing; this bracket specifically matches the hourglass reflector contour found in the US-spec assemblies, not the Euro-spec single-piece glass reflectors. Printed in a high-temp material (ASA or PC) to survive engine bay and halogen bulb heat.
Flat-Pack Turtle Dock
A modular, flat-pack style turtle dock designed to print completely support-free and assemble without any hardware or glue. The structure features a solid bridge held up by two arching legs, and an extended ramp that snaps onto the deck to reach the floor. No Glue Assembly: Features sturdy cross-lap mortise and tenon joints for the legs, and print-in-place C-clips for the ramp. Easy Printing: Designed as separate bodies. Simply use your slicer's "Split to Objects" function and lay all four pieces flat on the build plate. Climbing Grip: The 170mm long ramp includes extruded ridges to give your turtle plenty of traction. Print Instructions When you open this in your slicer, it will appear fully assembled. You must split it into separate parts (in PrusaSlicer or Bambu Studio, right-click and select "Split to Objects") and use the auto-arrange tool to lay them flat on your build plate. Because the parts sit perfectly flat, no supports are required.
AuraZex 150mm Prototype Torso
Central torso shell for the small-scale AuraZex school prototype. Designed to accept the 30x30mm neck socket from the head unit and features mechanical shoulder mounts on the upper sides. Mating Surfaces Bottom: Carries the exact 4x M5 bolt pattern and dual 12mm wiring pass-throughs to bolt straight onto the AuraZex Waist Bracket. Top: 32x32mm socket providing 1mm clearance for the 30x30mm head connector. Front: Proportionally scaled 120x84mm landscape recess for the tablet, with a central wiring pass-through. Rear: Removable service panel secured by four M3 screws. Prints in FDM with 3mm structural walls and internal component standoffs already placed on the inner front face.
AuraZex 30mm Neck / Torso Chassis
A central chassis block serving as the core of a small-scale AuraZex prototype. Designed to integrate directly with the standard 30×30 mm neck joint and provide mechanical anchor points for articulated shoulder assemblies. The front interface incorporates a precision recess scaled precisely to 50% (120×84 mm) of the full-size AuraZex chest tablet, keeping the prototype mathematically proportional while offering an exact fit for half-scale mockups. Fitment Specifications Neck Interface: 31.5 × 31.5 mm clearance pocket (10 mm depth) with a 22 mm square bolt pattern. Shoulder Sockets: 46 mm diameter flat mating faces. Accepts an 8 mm central axle with a three-point (3.2 mm) indexing circle at a 12 mm radius. Service Access: Removable vented rear panel secured by four M3 fasteners into a continuous recessed lip. Internal Capacity: Generous hollow routing cavity bridging the neck base, the chest screen recess, and four internal floor standoffs for rapid electronics integration.
Ethan
What it's for A custom rear foot pedal for the Escoone W6 electric scooter, heavily inspired by the KuKirin G2 profile. It features an aggressive 40-degree kicktail to lock your back foot in place and a shallow 0.2mm intersecting arrow pattern for grip without compromising structural strength. Dimensions Mounting: 2x M8 holes spaced exactly 4.5 inches (114.3 mm) apart. Deck Length: 180 mm of standing space. Kicktail: 40-degree upward sweep. Thickness: 15 mm solid body for PETG printing.
AuraZex Cybernetic Prototype Arm
A modular, FDM-optimized cybernetic prototype arm. Designed as a small-scale proof of concept for the AuraZex platform, this model is fully articulated with mechanical pivot joints, internal routing cavities, and removable maintenance panels. All components are laid out flat on the build plate for independent printing and subsequent physical assembly using the included printed pins. Prototype Specs Shoulder Base: 34×34×26 mm footprint, fixed mount Upper Arm Shell: 65 mm length, hollow core for a future SG90-sized servo Forearm Shell: 55 mm length, hollowed for wire routing Manipulator: Hinged palm with dual 2-link mechanical fingers Hardware: Assembles using the provided 4mm printable pins (or substitute with M4 hardware for extra durability) Access: 3mm thick removable service panels with alignment pegs
Friendly Robot Companion Head
A compact, friendly robot head prototype featuring a recessed smile display and twin ultrasonic sensor ports. Designed for small-scale desktop companions and educational robotics. Hardware Integration Sensors: Sized for standard HC-SR04 ultrasonic modules. Access: Rear service panel secured with four M3 screws for internal wiring. Mounting: 30 mm neck base with twin anchoring screws.
HC-SR04 & M3 Robot Head Prototype
The main sensor and display housing for the AuraZex prototype. Built in two halves for flat-on-bed FDM printing, the front shell handles all structural mounting while the rear acts as a removable service panel. Interface Checklist Sensors: Dual 16.5mm bores on 26mm centers (fits standard HC-SR04 ultrasonic modules). Display: 50x25mm recess with an integrated 2mm interior lip (46x21mm through-hole) to seat a rigid screen. Base Mount: 30x30mm rectangular feed-through, surrounded by an M3 four-hole bolt pattern (44x36mm spacing). Shifted off-center to clear the split line. Assembly: Two integrated 4mm alignment pins. Requires four M3x15mm screws to fasten the rear service panel. Verify your neck bracket matches the 44x36mm M3 pattern before printing.
Traxxas Slash Wedge Front Bumper
A replacement front bash bumper for the Traxxas Slash RC chassis, designed to replace broken stock parts after hard curb impacts. The leading edge is tapered into a skid-plate wedge to force the chassis up and over obstacles rather than absorbing direct frontal collisions. Mounting Interface: Two M3 clearance holes on a 25 mm pitch, recessed 8 mm from the rear face. Hardware Fitment: Counterbored 4 mm deep on the underside to protect M3 socket head screws from ground abrasion. Profile: Tapers from a 15 mm rear mating surface down to a 10 mm leading edge, providing a sloped glide plane. Width: 104 mm across the front face for wide coverage of the front bulkhead.
AeroGuard — Latticed Prop Guards
Introducing AeroGuard, a lightweight protective ring designed to keep DJI Mini 3 flights safe around trees and tight spaces. The slanted, latticed airflow design reduces overall weight and minimizes downdraft interference, ensuring the drone remains agile while shrugging off minor impacts. Features Optimized Clearance: 100mm inner diameter provides a safe 5mm buffer around standard 90mm propellers. Aerodynamic Profile: Slanted lattice cutouts allow thrust to pass through the guard ring smoothly. Snap-Fit Mounting: Integrated C-clip securely snaps over a standard drone arm. Print Notes Print flat on the plate. A durable, impact-resistant filament like PETG or an engineered PLA is recommended to survive branch encounters.
Sistema de Dirección Ackermann2
Sistema de dirección frontal mecánico tipo Ackermann, diseñado para vehículos a radiocontrol o maquetas. Las manguetas descansan sobre el eje rígido principal y se conectan mediante una barra de acoplamiento, asegurando que la rueda interior trace un radio de giro más cerrado que la exterior durante las curvas. Puntos de Modificación Este diseño está pensado como una plataforma base para integrarse en chasis personalizados. Las cotas actuales sirven como punto de partida: Ancho del eje: 100 mm totales, con 90 mm entre los centros de pivote. Geometría Ackermann: Los brazos de dirección tienen una longitud de 20 mm y un ángulo de inclinación interna de 15 grados. Tornillería: Los orificios en el eje y la barra son pasantes de 3.2 mm, mientras que las manguetas cuentan con orificios de 2.8 mm diseñados para que tornillos M3 muerdan directamente en el plástico. Ejes de rueda: Los vástagos laterales miden 5 mm de diámetro por 18 mm de largo, compatibles con rodamientos estándar de RC 5x10 o hexágonos adaptadores.
Sweeping Dollhouse Window Slide
A large 3D-printable playground slide designed to mount securely into a 90 mm window frame, sized for 1:6 scale dolls. The track follows a single smooth clockwise sweep out and away from the dollhouse, transitioning cleanly to the floor. Broad Descent: Uses a smooth Bezier sweep to drop 460 mm without looping or reversing direction. Upright Geometry: The track remains perfectly level across its width from top to bottom. Window Mount: Features a squared notch that drops cleanly over a standard lower window edge.
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