Parts catalogue · Robotics · Melbourne

Micro gearmotor drive set: face-mount bracket, 44 mm wheel and TPU tyre (fits 12 x 10 mm N20-size motors)

Everything printed for a two-wheel robot car built on 12 x 10 mm micro metal gearmotors (N20 size). The PETG bracket screws to the gearbox's two M1.6 holes, cradles the gearbox in a saddle and bolts to the chassis with four M3 holes; the 44 mm PETG wheel press-fits the 3 mm D shaft; the TPU 95A tyre stretches on for grip and gives a 50 mm outside diameter. Dimensions come from the published micro-metal-gearmotor drawing. For classroom robot cars, line followers, micro-mouse and small ROS rovers; sold in pairs and class packs, printed to order in our Melbourne workshop.

From A$8Made to order Studio renders, real photos coming

From A$8 for the drive pair (2 brackets, 2 wheels, 2 tyres). Printed to order in Melbourne and shipped Australia-wide; we confirm the final price and lead time before anything is printed.

Get a quote → Email us about this part

On the quote page choose Request a quote (no file needed) and name this part and the option you want.

Black 3D printed robot wheel with six lightening holes and an orange treaded tyre, mounted on a small black face-plate bracket with a flat base — Studio render: made to order, real photos coming: bracket, wheel (PETG) and treaded tyre (TPU 95A).

Order status. The motor outline comes from the published dimension drawing. How tightly a printed D-bore grips a 3 mm D shaft is not a published number, so the first order includes the free D-shaft coupon to set the wheel fit.

What does it look like in use?

Renders are computer images of our own design, made from the same model we print. This family is made to order: real photos of our first prints are coming.

A plain metal-coloured block motor stand-in in the black bracket, with the black wheel and orange tyre on its shaft — **In use (render)**Render: a plain motor-sized stand-in in the bracket. The motor is a stand-in, not a product.

Specifications: material, size and what it fits

Spec	Detail
Material	Bracket and wheel PETG; tyre TPU 95A. 0.24 mm layers on a 0.6 mm nozzle, 3 walls, no supports
Bracket	30 x 28.9 x 15.2 mm: 2.5 mm face plate with two 1.9 mm holes for M1.6 screws and a 5.0 mm boss hole, saddle with 0.2 mm per side on the 12 mm gearbox, base with 4 x M3 holes on 24 x 12 mm, cable-tie slot. About 3.9 g
Wheel	44 mm rim, 8 mm wide, full-width hub with a D-bore that press-fits a 3 mm D shaft (default +0.05 mm per side), six lightening holes, lips at both rim edges. About 5.1 g
Tyre	TPU 95A ring with tread grooves, 50 mm outside, printed 2.4 % undersize so it stretches onto the rim (41 to 42 mm inside). About 3.7 g
Fits	12 x 10 mm micro metal / N20-size gearmotors with 2 x M1.6 holes 4.5 mm either side of the shaft and a 3 mm D shaft (flat to 2.5 mm), from Pololu's published micro-metal-gearmotor dimension drawing (rev 5.1). Check your motor against that drawing
Hardware	Not included: 2 x M1.6 x 3 screws per motor (never longer than 3 mm: too-long screws can jam the gears), 4 x M3 screws and nuts to the chassis. Motors not included
Fit coupon	Free with an order: four D-bore hubs at 0.00 / 0.05 / 0.10 / 0.15 mm per side and a face-plate strip. Push each hub on your shaft and we print your wheels at the one that grips

Pololu is a trademark of its owner, named only to cite its published motor drawing. N20 is a common size name. These parts are our own design and are not affiliated with or endorsed by any motor maker.

How much does it cost?

Guide prices for printed parts, in Australian dollars. Shipping is extra; we confirm the final price, including any business minimum, before printing. Bulk and custom sizes are quoted per job.

Option	From
Drive pair: 2 brackets + 2 wheels + 2 TPU tyres	A$8
Class pack: 10 drive pairs	A$79.95
D-shaft fit coupon	Free with an order
Other wheel diameters	Quoted, usually no extra charge

Who it's for

Teachers and STEM programs building classroom robot cars, line-follower and micro-mouse builders, and makers of small ROS rovers on N20-size motors.

Get a quote →Bulk or custom enquiry

Safety & use

Installation & use. Designed for the uses described on this page only. Fixings are not included: use the sizes listed, check they are tight before use, and check the parts regularly for wear or damage. Not for safety-critical or overhead load-bearing use. Damage caused by misuse, modification or overloading isn't a fault in the product.

Small parts. Not for children under 3. Use M1.6 screws no longer than 3 mm into the gearbox, and keep fingers and hair away from spinning wheels.

This doesn't affect your rights under the Australian Consumer Law.

FAQ

Common questions

Which motors does it fit?

12 x 10 mm micro metal gearmotors, often sold as N20 size, with two M1.6 holes 4.5 mm either side of the shaft and a 3 mm D shaft. Dimensions are from Pololu's published drawing; many N20 motors share them, but check yours against that drawing.

How does the wheel stay on?

It press-fits the 3 mm D shaft over the full width of the hub. The free coupon has four bore sizes: push each onto your shaft, pick the one that needs firm thumb pressure and does not spin on the flat, and we print your wheels to it.

Why a separate TPU tyre?

TPU 95A grips the floor far better than a hard PETG rim and is easy to replace. It is printed slightly undersize so it stretches onto the rim and stays between the two lips.

Can you supply a class set?

Yes. A class pack of 10 drive pairs is A$79.95; bigger runs are quoted per job with an invoice and purchase order. Motors and screws are not included.

How do I order?

Use Get a quote and choose Request a quote, naming drive pairs or class packs and the tyre colour. We confirm the price and lead time before anything is printed.