Formada3D Ultrasonic sensor holder + 2020 tilt base, PETG (fits HC-SR04-type 45 x 20 mm modules)
A two-piece mount for the common 45 x 20 mm two-can ultrasonic range sensor on robots, rovers and test rigs built from 2020 extrusion. The module presses into the holder from behind: its two cans pass through 17.5 mm holes, the board sits in a pocket and four snap lips hold it, with a gap for the header pins, so no screws touch the board. The holder pivots between the base's two cheeks on M3 bolts and locks by friction anywhere from 60 degrees up to 44 degrees down, for wall following or floor and drop detection. The base fixes to the rail with two M5 slots. Printed to order in our Melbourne workshop; a free fit coupon comes first.
From A$8 for the holder + tilt base kit. Printed to order in Melbourne and shipped Australia-wide; we confirm the final price and lead time before anything is printed.
On the quote page choose Request a quote (no file needed) and name this part and the option you want.
Order status. Only the module's 45 x 20 x 15 mm outline is published. The can size and spacing and the board thickness vary between makers, so the free coupon checks the fit and we adjust the holder to your module if needed.
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.
Specifications: material, size and what it fits
| Spec | Detail |
|---|---|
| Material | PETG, 3 walls, 5 % infill (it carries only the sensor), 0.20-0.24 mm layers, no supports. Holder printed face-down, base foot-down |
| Holder | 55.2 x 24.2 x 19.5 mm, about 4.5 g: 2.5 mm front plate with two 17.5 mm can holes 26 mm apart, 45.6 x 20.6 mm pocket, four 0.6 mm snap lips, 12 mm header gap, two pivot ears |
| Tilt base | 92 x 20 x 31 mm, about 9.5 g: two cheeks with M3 pivot holes, 0.25 mm gap to the ears, two M5 slots 76 mm apart. Tilt range checked by sweep: 60 degrees up to 44 degrees down |
| Fits | HC-SR04-type modules, 45 x 20 x 15 mm (Elecfreaks datasheet). Can size, can spacing and board thickness are not published; ours are set to 16 mm, 26 mm and 1.6 mm and checked with the coupon |
| Hardware | Not included: 2 x M3 x 10 + nyloc nuts (pivot), 2 x M5 x 8 + 2020 T-nuts. The module snaps in without screws |
| Fit coupon | Free with an order: the holder's front plate, pocket and snap lips without the ears, to press your module into first |
HC-SR04 and Elecfreaks are named only to describe fit. This holder is our own design and is not affiliated with or endorsed by any sensor 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 |
|---|---|
| Holder + tilt base kit, PETG | A$8 |
| 4 kits | A$12.95 |
| Fit coupon | Free with an order |
Who it's for
Robotics students, rover and line-follower builders, and anyone adding an ultrasonic range sensor to a 2020 extrusion robot or test rig.
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.
Electronics. This is a plastic holder with no electrical function. The sensor and its wiring are your own: fit and use them to their maker's instructions.
This doesn't affect your rights under the Australian Consumer Law.
Common questions
Which sensors does it fit?
Two-can ultrasonic range modules with a 45 x 20 mm board, such as the HC-SR04 type. Can spacing and board thickness vary between makers, so print or ask for the free coupon first and we adjust the holder to your module.
How is the sensor held?
It presses in from behind: the cans pass through the front plate, the board sits in a 0.3 mm pocket and four snap lips catch its back edge. A 12 mm gap leaves room for the header pins.
How far does it tilt?
From 60 degrees up to 44 degrees down. Two M3 bolts with nyloc nuts form the pivot and hold the angle by friction.
How does it mount?
Two M5 slots 76 mm apart take M5 x 8 screws into 2020 T-nuts, or bolt it to any plate with M5 holes.
How do I order?
Use Get a quote and choose Request a quote, naming the number of kits. We confirm the price and lead time before anything is printed.
More from the parts catalogue
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Servo bracket and camera mount kit for 2020 extrusion
Standard-servo bracket and a camera mount for 2020 aluminium extrusion, in PETG.
SG90-size micro servo bracket for 2020 extrusion, PETG (fits Tower Pro SG90 and same-size 9 g servos)
Top-plate bracket that holds a 9 g micro servo upright on 2020 extrusion: slotted ear holes, M5 feet, cable slots.
Last updated 15 October 2026.