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.*
28BYJ-48 Outboard Bearing Drive Bracket
Bracket that bolts a 28BYJ-48 geared stepper (35 mm ear spacing, 5 mm flatted shaft offset 8 mm from the body) to a vertical plate and carries a 625 bearing (16 mm press pocket) in a second upright 50 mm away, so a 5 mm steel output shaft takes the side load instead of the motor's thin shaft. A 30 mm snap-off coupler with two 5.3 mm bores and M3 self-tap set screws joins the motor flat to the output shaft; the ear slots are 4.5 x 7.5 mm so the motor slides until the coupler spins freely. Base 80 x 44 x 4 mm with four M3 holes at 62 x 26 mm.
Window Screen Spline Roller Tool
A two-wheel spline roller for rescreening window and screen-door frames. It is a 150 x 24 x 16 mm handle with an open fork at each end. Each fork holds a 35–36 mm wheel on a 625 bearing (5 x 16 x 5 mm). The wheels have 16.05 mm press-fit bores and run on an M5 x 30 bolt. There is a captured M5 nut pocket, and an M5 washer goes on each side of the bearing. The convex wheel presses the mesh into the channel, and the 90° V-groove wheel seats the spline. Both wheels print on sprues beside the handle and snap off.
Knee-Driven Lower Leg With Foot
A 145 mm lower-leg shank and foot for a small servo-driven walker. The knee hub bolts to a round servo horn using radial M3 slots that fit a range of horn patterns, and it has a 9 mm spline-clearance hole. A 625 bearing (5 x 16 x 5 mm) presses into the upper boss, and an M5 bolt runs through it as the outboard pivot, so the servo shaft doesn't take the side load. The shank is a flanged, tapered I-beam and the stadium foot is hollowed to save weight.
Upper Leg Bearing Plate
The outer half of the upper leg in the 'MG996R 12-DOF Quadruped Robot Dog' kit. It is a 169 x 60 x 5 mm plate that screws onto the four 44 mm posts of the Upper Leg Servo Plate with M3 screws, which sit in 6.5 mm counterbores and thread into heat-set inserts. At the shoulder, a 30 mm boss holds a press-fit 625 bearing (16.05 x 5.2 mm pocket, 6 mm through-hole) for the M5x20 pivot bolt. At the knee, a 5.5 x 16 mm M5 slot is the idler side of the 44 mm knee clevis, and you slide it to line the pivot up with the servo shaft.
625 Differential Rocker Bar
This is the differential bar for the 'NEMA17 Rocker-Bogie Mars Rover Chassis' kit. It is a 172 × 28 × 8 mm bar that pivots under the deck on an M5x25 bolt. A 625 bearing (5 × 16 × 5 mm) press-fits into a 16.05 mm pocket in the 28 mm hub. Each end at ±80 mm has a 3.4 mm eye for the M3x25 cross-pin links, so the bar averages the two rocker angles and keeps the deck level.
Six-Pin Output Carrier
This is the rotating output flange of the 'NEMA17 Cycloidal Joint Actuator' kit. It has a Ø60 x 6 mm flange that sits under the cover lip and a Ø50 x 9.5 mm boss (15.5 mm tall overall). On the underside it takes a 625 bearing (5 x 16 x 5) in a Ø16.05 x 5.2 pocket and six 5 x 14 mm steel output pins pressed into Ø5.0 x 5.5 blind holes on a 21 mm radius. The top face has four M3 brass heat-set inserts (Ø4.0 x 6) on a Ø36 circle for bolting on the output arm or your own payload.
Upper Arm Elbow Link
This is the shoulder-to-elbow link of the 'SG90 Four-Axis Desktop Robot Arm' kit. It is a 5 mm flat bar, 22 mm wide, 80 mm between axes and 119 mm long overall. The Ø24 × 9 mm shoulder hub has a double-arm SG90 horn pocket on the bottom face (7.5 × 36 × 1.8 mm, Ø5.3 screw hole) and a Ø16.05 × 5 mm press-fit pocket on top for a 625 bearing (5 × 16 × 5), with a 2.2 mm web between them. The elbow end has a 28 × 12.6 mm SG90 window with M2 ear slots, which puts the elbow servo shaft at 80 mm.
Twin-625 Flanged Idler Drum
This is the belt-return idler for the 'NEMA17 Belt-Drive Camera Slider' kit. It is a 34 mm dia × 12.5 mm flanged drum with a 26 mm dia × 7 mm smooth face for a 6 mm GT2 belt. Two 625 bearings (5×16×5 mm) press into its 16.05 mm through-bore, one from each end. It turns on the M5x35 axle in the Slider Idler Fork End Block, with one M5 washer on top. The top flange is a 45° chamfer, so it prints standing up with no supports.
Dual 625 Outboard Wheel Axle Block
A flanged bearing block that holds two 625 bearings (5 x 16 x 5 mm, press-fit 16.05 mm pockets, 21.6 mm apart) on a 5 mm wheel axle. It bolts to a chassis side plate with four M3 screws on a 32 mm square. It takes the wheel load off wobbly TT gearmotor output shafts and other small drive shafts: couple the motor to the 5 mm axle and let this 44 x 44 x 32 mm ribbed block carry the load.
Quadruped Leg Shin With Spring Foot
A tibia link for small DIY quadruped robots (SpotMicro / Petoi class) with a compliant leaf-spring foot printed as one piece with the shin, so foot strike is absorbed instead of hammering the knee servo. The knee is a 16.05 mm through bore for two 625 bearings (5 x 16 x 5 mm) on a 5 mm shaft or M5 bolt; a 3.4 mm M3 clearance hole sits on a 20.2 mm lever arm for the servo pushrod, and the rounded toe is cross-drilled M3 for a rubber pad or spike. 111 mm from knee centre to toe, 10 mm thick, printed flat so every bending load runs in the XY plane and never across layer lines.
NEMA 17 Peristaltic Pump Head
A two-piece peristaltic pump head that bolts straight to a NEMA 17 stepper (31 mm square M3 pattern, M3x12 counterbored screws) and runs 4 mm OD / 2 mm ID silicone tube for dosing, aquarium top-off or coolant. Ø53 x 22 mm; the three-roller rotor prints captive inside the housing's conical throat, clamps to the 5 mm shaft with an M3 grub screw, and takes three 625 bearings (16 x 5 x 5 mm) press-fit on the 4.9 mm posts — the 1.6 mm gap to the race wall fully occludes the tube.
Chisel Honing Guide With 625 Roller
A side-loading honing guide that holds a chisel or plane iron at a repeatable bevel angle on a waterstone or diamond plate: blades up to 52 mm wide and 2–8 mm thick slide into the 9 mm slot and are pinched flat by four M4 screws in heat-set inserts, while a 625 bearing (16 mm OD) rolls on an M5 bolt axle. Overall 66 x 40 x 33.5 mm; blade projection past the front face sets the angle — 38 mm ≈ 25°, 30 mm ≈ 30°, 23 mm ≈ 35°. Printed standing on its back face so every wall is vertical and the clamp beam never delaminates.
608 625 624 Bearing Sort Rack
A bench rack that stops 608, 625 and 624 bearings rolling around in a drawer: four vertical chutes with 22.2 mm, 16.2 mm and 13.2 mm bores take bearings in from the top and hold 6-8 of each size, tubes stepping down by size so the big skate bearings and the small 624s are never mixed up. The 124 x 30 x 4 mm plate carries two 4.5 mm holes for M4 screws to a bench, wall or pegboard.