Heads up: many models on this page are AI-generated or uploaded untested. They may be misconfigured for the intended application — check the dimensions and tolerances, and verify or edit the model before printing or relying on it.*
Pi Zero Snake Head
The open-top head from the 'SG90 Wheeled Serpentine Snake Robot' kit. It measures 90 x 36 x 33 mm and holds a Raspberry Pi Zero or Zero 2 W on four 6 mm standoffs spaced 58 x 23 mm, fastened with M2.5x12 screws and nuts. The 4 mm rear wall has four 3.4 mm holes and bolts to the first segment housing with M3x12 SHCS. The front face has four M3 heat-set bores (4.0 x 8 mm) on the same 16 x 20 mm pattern for sensor plates. A split port window in the left wall gives access to the Pi's USB and mini-HDMI connectors.
624 Bearing Tread Wheel
A 32 mm OD x 9 mm wide passive side wheel from the 'SG90 Wheeled Serpentine Snake Robot' kit. It has a 13.05 mm press pocket, 5 mm deep, for a 624 bearing (4 x 13 x 5 mm), and a 4 mm outer web with a 10 mm through-hole so an M4x16 SHCS and washer can bear on the inner race. A 3 x 1.5 mm centred tread groove takes a rubber band or O-ring tyre for sideways grip.
Wheel Axle Bridge
A 16 x 36 x 11.5 mm black box-section axle bridge from the 'SG90 Wheeled Serpentine Snake Robot' kit. It bolts under each Servo Segment Housing floor with two M3x12 SHCS through 3.4 mm holes into the floor's M3 heat-set inserts. Each flat outer cheek at y = ±18 carries an 11 mm M4 heat-set boss with a 5.5 mm teardrop bore. That bore takes an M4x16 SHCS as the axle for a 624-bearing tread wheel. A bottom tie and a centre web stiffen the cheeks against wheel side-load, and relief pockets let a hex key reach the M3 screw heads.
Servo Tab Clamp Frame
A 36 x 34 x 6 mm black clamp frame from the 'SG90 Wheeled Serpentine Snake Robot' kit. It holds an SG90 or MG90S servo's mounting tabs down onto the Servo Segment Housing's z=33 seat, and the servo body and output shaft pass through its 23.6 x 13.0 mm opening. Four 3.4 mm holes on a 16 x 22 mm pattern take M3x12 SHCS into the housing's heat-set inserts. The frame clamps the tabs flat, so it works whatever the clone's tab thickness or hole spacing.
Servo Segment Housing
Open-top body segment for the 'SG90 Wheeled Serpentine Snake Robot' kit. It measures 50 x 36 x 33 mm and holds an SG90 or MG90S servo on a z=33 tab seat. Four M3 heat-set pillars take the clamp frame, and a 16 x 20 mm M3 heat-set face bolts to the next yoke. It also has an M4 pivot slot for the 624-bearing joint bolt and two M3 heat-set floor bosses for the wheel axle bridge.
Continuum Snake Spine Vertebra
A stackable 2-DOF vertebra for snake robots and tendon-driven continuum arms. Each 36 mm link has a 10 mm hollow centre channel for wiring and four 2.4 mm tendon holes on a 30 mm circle. You chain identical links by turning each one 90° to the last. Every pivot is an M3x8 screw that passes through a 3.4 mm clearance tab and threads into a 2.6 mm self-tap tab, and each joint tilts about ±35°. It prints without supports because a 45° funnel sits under the disc.