Small Geared Stepper Motor 15mm with Encoder and Multiple Gear Ratios
KC-GM12-15BY Small Geared Stepper Motor With Encoder
The KC-GM12-15BY is a 15 mm, 2-phase permanent magnet small geared stepper motor combining a multi-stage reduction gearbox with optional encoder feedback. The product family supports multiple winding, reduction ratio, shaft and encoder configurations for positioning and small electromechanical drive systems.
General And Mechanical Specifications
| Parameter | Specification |
|---|---|
| Main Model | KC-GM12-15BY |
| Encoder Model | KC-GM12-15BY-EN |
| Brand | Kechen Motor |
| Product Type | 2-phase geared permanent magnet stepper motor with encoder |
| Motor Construction | 2-phase, 4-wire permanent magnet stepper motor |
| Motor Diameter | Approx. 15 mm |
| Gearbox Type | Multi-stage gear reduction gearbox |
| Gearbox Size | Approx. 12 mm × 10 mm |
| Gearbox Length | 9 mm |
| Motor Step Angle | 18° / step |
| Excitation Mode | 2-2 |
| Rated Voltage Options | 3 V / 5 V / 6 V / 9 V / 12 V / 24 V DC |
| Detailed Winding Voltages | 5 V DC / 12 V DC |
| Phase Current Range | 210–500 mA / phase |
| Phase Resistance | 10–40 Ω / phase; exact value depends on winding |
| Maximum Starting Frequency | 800–1200 PPS |
| Motor Test Condition | 800 PPS |
| Rated Torque | Up to 3 kg·cm, depending on configuration |
| General Maximum Torque Range | 0.5–3.0 kg·cm |
| General Reduction Ratio Range | 1:10 to 1:500; multiple stages available |
| Additional Listed Ratios | 3:1 / 10:1 / 50:1 / 99:1 / 145:1 / 196:1 / 230:1 / 238:1 / 378:1 / 500:1 / 760:1 / 1000:1 / 1200:1 |
| Gear Material | Steel |
| Encoder Options | 3 PPR / 7 PPR / 12 PPR |
| Standard Encoder Shown | 3 PPR |
| Output Shaft Options | D-shaft / round shaft / M3 / M4 / custom |
| Shaft Diameter Options | 3 mm / 4 mm |
| Typical Output Shaft | 3 mm D-cut shaft |
| D-Cut Depth | 0.5 mm |
| Shaft Length Options | 8–15 mm, customizable |
| Drawing Shaft Extension | 10 ± 0.15 mm |
| Motor Body Length Shown | 10.74 mm |
| Mounting Thread | 2 × M1.6 |
| Insulation Resistance | ≥ 50 MΩ at 300 V DC |
| Noise | ≤ 50 dB(A) |
| Operating Temperature | −10 °C to +55 °C typical; an alternative general specification lists −10 °C to +60 °C |
| Weight | Approx. 17–18 g, depending on configuration |
| Lead Wire | UL1571 30 AWG |
| Lead Wire Length | 90 ± 10 mm |
| Connector | 1.25 × 4P |
| Connector Options | 1.25 mm / 1.5 mm / 2.0 mm / 2.54 mm |
| Motor Wiring | A+ red / A− white / B+ black / B− brown |
| Customizable Items | Voltage, winding resistance, phase current, reduction ratio, encoder resolution, shaft diameter, shaft length, D-cut or round shaft, M3 / M4 shaft, connector and lead wire length |
Gearbox Performance And Winding Data
Gear performance data are specified at the listed test condition. Final output depends on the selected winding, reduction ratio, encoder and mechanical configuration.
| Ratio | Stage | Gearbox Length | Output Step Angle | Pull-Out Torque | Speed |
|---|---|---|---|---|---|
| 10:1 | 2 | 9 mm | 1.80° | 160 gf·cm | 240.0 rpm |
| 20:1 | 3 | 9 mm | 0.90° | 280 gf·cm | 120.0 rpm |
| 30:1 | 3 | 9 mm | 0.60° | 420 gf·cm | 80.0 rpm |
| 50:1 | 4 | 9 mm | 0.36° | 600 gf·cm | 48.0 rpm |
| 75:1 | 4 | 9 mm | 0.24° | 900 gf·cm | 32.0 rpm |
| 100:1 | 4 | 9 mm | 0.18° | 1200 gf·cm | 24.0 rpm |
| 165:1 | 5 | 9 mm | 0.11° | 1650 gf·cm | 14.5 rpm |
| 210:1 | 5 | 9 mm | 0.09° | 2100 gf·cm | 11.4 rpm |
| 250:1 | 5 | 9 mm | 0.07° | 2500 gf·cm | 9.6 rpm |
| 298:1 | 5 | 9 mm | 0.06° | 2980 gf·cm | 8.1 rpm |
| 380:1 | 5 | 9 mm | 0.05° | 3800 gf·cm | 6.3 rpm |
| Winding Model | Voltage | Resistance | Current | Detent Torque | Holding Torque | Working Temperature |
|---|---|---|---|---|---|---|
| KC-GM12-15BYJ2510-C | 5 V DC | 10 Ω / phase | 400 mA / phase | 8 gf·cm | 45 gf·cm | 10–50 °C |
| KC-GM12-15BYJ2540-C | 12 V DC | 40 Ω / phase | 290 mA / phase | 8 gf·cm | 40 gf·cm | 10–50 °C |
| KC-GM12-15BYJ25120-C | 12 V DC | 120 Ω / phase | 60 mA / phase | 8 gf·cm | 55 gf·cm | 10–50 °C |
KC-GM12-15BY-EN Dimensions
Engineering Advantages
- Integrated Gearbox And Encoder: The motor, reduction gearbox and optional 3 PPR, 7 PPR or 12 PPR encoder can be configured as one drive assembly for controlled motion systems.
- Multiple Reduction Ratios: Gear ratio selection allows engineers to balance output speed, output step angle and available torque for the target mechanism.
- Winding Selection: Available winding configurations include documented 5 V and 12 V versions with different resistance, current and holding torque characteristics.
- Mechanical Configuration: D-shaft, round shaft, M3, M4 and custom shaft options support different couplings, gears and load interfaces.
- Project-Level Customization: Reduction ratio, encoder resolution, winding parameters, shaft dimensions, connector and lead wire length can be matched to application requirements subject to validation.
Configuration And Application Guidance
This 15mm geared stepper motor is intended for mechanisms where the direct 18° motor step requires further speed reduction and finer output movement. Increasing the reduction ratio lowers output speed and output step angle while changing the available output torque.
For a stepper motor with gearbox and encoder, the final winding, reduction ratio, encoder resolution and shaft interface should be selected together. Exact electrical and mechanical parameters should be confirmed against the required load, positioning method and approved sample.
Payment
- Quotation Confirmation: Payment terms are confirmed according to the quoted motor configuration and order requirements.
- Custom Configuration: Any winding, gearbox, encoder, shaft or connector changes should be confirmed before commercial terms are finalized.
Shipping
- Shipping Arrangement: The shipping method is confirmed according to destination, shipment size and project requirements.
- Schedule Confirmation: Dispatch and transport timing should be confirmed with the final quotation because the product may involve winding, gearbox, encoder or shaft customization.
KC-GM12-15BY FAQ
What Encoder Resolutions Are Available?
The product family lists 3 PPR, 7 PPR and 12 PPR encoder options. The illustrated KC-GM12-15BY-EN configuration uses a 3 PPR encoder.
Can The Gear Ratio Be Selected For Different Output Speeds?
Yes. Multiple gearbox ratios are listed for the KC-GM12-15BY family. The detailed performance table shows how ratio selection changes output step angle, pull-out torque and speed.
Are 5 V And 12 V Windings Available?
Yes. The supplied data include 5 V DC and 12 V DC winding models with different phase resistance, phase current and holding torque values.
Can The Output Shaft Be Customized?
Yes. Listed options include D-shaft, round shaft, M3 and M4 configurations, with customizable shaft diameter and length subject to project requirements.
Does Every Configuration Have The Same Torque And Current?
No. Current, resistance, holding torque, output torque and speed vary with the winding and gearbox configuration. Exact values should be based on the selected model and approved sample.
What Should Be Confirmed Before Selecting This Motor?
Confirm the required voltage, load torque, output speed, reduction ratio, encoder resolution, shaft interface, connector and available installation space before finalizing the configuration.
Specification Note
Specifications are for reference only. The KC-GM12-15BY family contains multiple winding, gearbox, encoder and shaft configurations. Final parameters should be confirmed based on the selected configuration, approved samples and project requirements.
