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N20 Carrier Clamp Cap
A 34 x 70 x 4 mm ribbed clamp plate for the 'SG90 Ackermann Steering Rover Chassis' kit. It closes the N20 Twin Motor Carrier's channel and squeezes both GA12-N20 (12 x 10 mm) gearmotors, which stand 0.4 mm proud of the channel, so they can't wobble. Four 3.4 mm holes on the 24 x 44 mm pattern take the M3x30 screws that run up through the cap, the carrier and the deck. Two 2 x 3 mm ribs stiffen the plate over the gearboxes.
N20 Twin Motor Carrier
The rear drive block of the 'SG90 Ackermann Steering Rover Chassis' kit. It is 34 x 70 x 17.1 mm and holds two N20 (GA12-N20, 12 x 10 mm) gearmotors back to back in a 12.4 x 9.6 mm channel, with the output shafts pointing outward. It bolts under the deck on the shared 24 x 44 mm M3 (3.4 mm) pattern using M3x30 screws that pass through the clamp cap. The gearboxes sit 0.4 mm proud, so the cap squeezes them firmly in place, and a notch in the cap-side face lets the motor wires out.
Twin N20 Motor Clamp Bar
A 30 x 49 x 5 mm clamp bar from the 'N20 Twin-Track Mini Tank Chassis' kit. It lies across the tops of both 12 x 10 mm N20 gearmotors and pulls them down into the Tank Hull Tub cradle with four M3x8 SHCS (3.4 mm holes at ±11/±20 mm) screwed into the hull's heat-set posts. Two 1.5 mm locating lips straddle the 12 mm motor bodies with 0.4 mm clearance, and a 10 mm notch passes the motor wires.
N20 Gearmotor Tunnel Clamp
A 24 x 26 x 22 mm block that holds one N20 micro gearmotor under the chassis, for the 'N20 4WD Skid-Steer Rover Base' kit (print 4). The gearbox slides into a 12.4 x 10.4 mm open-ended tunnel with 1 mm lead-in chamfers, and an M3x6 pusher screw in a 4.0 mm heat-set insert clamps it in place. Two M3 heat-set bores (4.0 x 6 mm, 16 mm apart) take M3x8 screws from the plate top.
N20 Gearmotor Zip-Tie V-Cradle Mount
A 48 x 34 x 20 mm chassis mount for micro metal gearmotors (N20/N30, 12 mm round can): a 90° V-cradle self-centres any can from about 10 to 14 mm diameter and two 4.5 x 2.4 mm tunnels take zip ties straight over the motor, so it needs no motor-specific bolt pattern. A 6 mm solid rear thrust wall stops the motor being pushed back by wheel side load, and the 4 mm base has four 3.4 mm M3 slots (11 mm of travel, on 30 x 25 mm centres) plus one round 3.4 mm M3 hole for a located third point.
5 mm Shaft To 12 mm Hex Wheel Hub
Adapter hub that puts standard 1/10-scale RC wheels (12 mm hex drive) on any 5 mm motor shaft — NEMA 17, 37 mm gearmotor or brushed can motor. 34 mm flange × 24 mm tall: 5.3 mm shaft bore with a captured M3 nut and grub screw, a 11.8 mm across-flats hex boss 10 mm long, an M4 heat-set insert bore (5.5 mm × 8 mm) in the nose for the wheel retaining screw, and four M3 clearance holes on a 25 mm bolt circle for bolting on a disc, pulley or custom wheel.
37 mm Gearmotor Clamp Mount Plate
A split clamp collar that grips the 37 mm round body of a JGB37-520 / 37D class gearmotor (37.3 mm bore, 23 mm of grip, two M3 pinch bolts with captured nuts) on a 78 x 56 x 7 mm flange that presents the standard NEMA 17 31 mm bolt square as four M3 heat-set inserts, so a DC gearmotor drops straight onto a chassis already drilled for a stepper. Two M5 clearance holes 67 mm apart on the ears bolt it flat to a 2020 extrusion, and the motor gearbox face registers against a 1 mm deep seat around the 26 mm shaft opening.