112-20A – 12mm Coreless Motor
Coreless Ø12 x 20.8mm / single shaft / precious metal brushes
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Drawing
Key Features
| Model No. | 112-20A | ||
| Motor Type | Coreless | ||
| Diameter | mm | 12 | |
| Length | mm | 20.8 | |
| Voltage | V | 3.0 | |
| No-load Current | A | 0.028 | |
| No-load Speed | rpm | 9150 | |
| Stall Torque | mNm | 6.67 | |
| Stall Current | A | 2.31 | |
| Nominal Torque | mNm | 2.10 | |
| Nominal Speed | rpm | 3580 | |
| Nominal Current | A | 0.745 | |
| Commutation | Precision metal brushes |
Performance characteristics
| Nominal voltage | V | 3.0 | |
| No load speed | rpm | 9 150 | |
| No load current | A | 0.028 | |
| Nominal speed | rpm | 6 270 | |
| Nominal torque | mNm | 2.10 | |
| Nominal current | A | 0.745 | |
| Stall torque | mNm | 6.67 | |
| Stall current | A | 2.31 | |
| Maximum efficiency | % | 74.9 |
Design and accessories
| Availability | Stocked design | ||
| Motor Type | Brushed | ||
| Commutation | Precious metal brushes | ||
| Shafts | Single | ||
| Encoder | Not fitted | ||
| Gearbox | Not fitted | ||
| Connections | JST PHR-2 | ||
| Cable | 74mm x AWG32 | ||
| Housing Material | Nickel plated steel | ||
| Body diameter | mm | 12 | |
| Body length | mm | 20.8 | |
| Weight | g | 11.1 |
Motor body characteristics
| Thermal resistance housing-ambient | °C/W | 48.0 | |
| Thermal resistance winding-housing | °C/W | 15.0 | |
| Thermal resistance winding-housing | s | 6 | |
| Thermal time constant motor | s | 160 | |
| Ambient temperature | min | °C | -20 |
| max | °C | +60 | |
| Max. permissable winding temperature | °C | +85 | |
| Max. permissable rotor speed | rpm | 20 000 | |
| Axial play at axial load | mm | 0.3 max | |
| Max. axial load (dynamic) | N | 0.15 | |
| Max. force for press fits (static) | N | 10.0 | |
| Max. radial loading (3mm from flange) | N | 0.45 | |
| Number of pole pairs | 1 |
Winding specific characteristics
| Terminal resistance | Ω | 1.30 | |
| Terminal inductance | mH | 0.05 | |
| Torque constant (Kt) | mNm/A | 3.09 | |
| Speed constant (Kv) | rpm/V | 3 087 | |
| Speed / torque gradient | rpm/mNm | 1 371 | |
| Mechanical time constant | ms | 4.7 | |
| Rotor inertia | g.cm² | 0.30 |
Operating range (based on on ambient 25°C)
For each motor frame size (diameter / length), we present the operating range diagram that relates to the winding of the stock sampleable part. The part number of the stock sampleable part is shown in the diagram below, and the product page of the stock sampleable part, can be found in the ‘related products’ section towards the bottom of the page.
Sample request
We aim to get you up and prototyping as quickly as possible. We stock off-the-shelf samples for each motor size, to support commercial development.
Our application engineers can advise on motor design and selection, mechanism design, and support the development of high performance motor drivers. They can also assist to validate the in-application performance and longevity suitability of a down-selected motor or mechanism design.
Contact our application engineering team to discuss your project, using the form, or email [email protected].
Related products
| Product Image | Product Name | Stock Level | Motor Type | Diameter (mm) | Length (mm) | Voltage (V) | No-load Current (A) | No-load Speed (rpm) | Stall Torque (mNm) | Stall Current (A) | Nominal Torque (mNm) | Nominal Speed (rpm) | Nominal Current (A) | Commutation |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
112-601
Download Datasheet |
16 | Coreless | 12 | 20.8 | 6.0 | 0.014 | 8215 | 6.66 | 1.04 | 2.25 | 3580 | 0.360 | Precision metal brushes |
|
|
112-409
Download Datasheet |
Made to order | Coreless | 12 | 20.8 | 7.5 | 0.014 | 9250 | 6.69 | 0.94 | 2.05 | 3580 | 0.300 | Precision metal brushes |