NEMA 11(28mm) Hybrid Stepper Motor With Planetary Gearbox TSL-28GP-28STH
♦ Basic Info:
- Brand:TSL
- Origin:China
- Motor Model:TSL-28GP-28STH
- Motor Size:NEMA 11 (28mm)
- Motor Length:28mm/33mm/41mm/50mm/Customizable
- Phase:2 Phase
- Step Angel:1.8° Step Angle
- #More Specifications
- #Outline Drawing
♦ Typical Applications:
- 3D printers and precision automation systems
- Robotic joints and compact robotic mechanisms
- Optical instruments, medical devices, and laboratory automation
NEMA 11 Geared Stepper Motor Planetary Series TSL-28GP-28STH DataSheet
This NEMA 11 geared stepper motor (TSL-28GP-28STH Series) is engineered for precision applications demanding high torque within a compact footprint. Featuring a robust powder metallurgy gearbox, this series offers an ideal balance of durability and cost-efficiency. Our gearboxes deliver impressive backlash control: as low as 2° for 1-stage ratios, approximately 2° for 2-stage, and 2° to 3° for 3-stage ratios, ensuring smooth and consistent motion performance.
Beyond our standard powder metallurgy range, we also provide all-steel gearboxes for high-load environments and ultra-precision machined steel versions for projects requiring elite industrial-grade accuracy. Whether your application demands superior wear resistance or micron-level transmission precision, we can provide a customized motion solution. Please contact us today for technical consultation and a competitive quotation.
Nema 11 Stepper Motor Technical Data
| Motor Model | Step Angle | Rated Current | Phase Resistance | Phase Inductance | Holding Torque | Detent Torque | Rotor Inertia | Motor Length | Lead Wire | Motor Weight |
| ° | A | Ω | mH | N.m | N.m | g.cm² | mm | No. | g | |
| TSL-28STH2806A4 | 1.8 | 0.6 | 4.2 | 2.2 | 0.045 | 0.3 | 6 | 28 | 4 | 105 |
| TSL-28STH2803A4 | 1.8 | 0.35 | 12 | 5.8 | 0.045 | 0.3 | 6 | 28 | 4 | 105 |
| TSL-28STH3306A4 | 1.8 | 0.6 | 5.5 | 3.2 | 0.06 | 0.4 | 8 | 33 | 4 | 110 |
| TSL-28STH3303A4 | 1.8 | 0.35 | 15 | 9.2 | 0.06 | 0.4 | 8 | 33 | 4 | 110 |
| TSL-28STH4106A4 | 1.8 | 0.6 | 7 | 6 | 0.06 | 0.5 | 11 | 41 | 4 | 140 |
| TSL-28STH4103A4 | 1.8 | 0.35 | 20 | 15 | 0.06 | 0.5 | 11 | 41 | 4 | 140 |
| TSL-28STH5006A4 | 1.8 | 0.6 | 9 | 7.2 | 0.1 | 0.8 | 13 | 50 | 4 | 180 |
| TSL-28STH5003A4 | 1.8 | 0.35 | 24 | 18.5 | 0.1 | 0.8 | 13 | 50 | 4 | 180 |
💕The NEMA 11 geared stepper motor ’s technical specifications are for guidance,we offer custom solutions upon request.
⇒Unit Coversion: 1 g·cm ≈ 0.098 mN·m ≈ 0.014 oz·in;1 mm ≈ 0.039 in;1 g ≈ 0.035 oz1
Planetary Gear Reducer Technical Data
| Nominal Reduction Ratio | Actual Reduction Ratio | Number Of Gearbox Stages | Gearbox Length(L2) | Max Permissible Torque | Moment Permissible Torque |
| i:1 | i:1 | mm | Kg.cm | Kg.cm | |
| 3.17 | 63/17 | 1 | 31.4 | 20 | 40 |
| 5.18 | 57/11 | ||||
| 14 | 3969/289 | 2 | 37.8 | 30 | 60 |
| 19 | 3591/187 | ||||
| 27 | 3249/121 | ||||
| 50 | 250047/4913 | 3 | 44.2 | ||
| 82 | 226233/3179 | ||||
| 100 | 204687/2057 | ||||
| 139 | 185193/1331 | ||||
| 189 | 15752961/83521 | 4 | 50.6 | ||
| 262 | 14252679/54043 | ||||
| 369 | 12895281/34969 | ||||
| 516 | 11667159/22627 | ||||
| 721 | 10556001 |
💕The NEMA 11 geared stepper motor planetary gearbox ’s technical specifications are for guidance,we offer custom solutions upon request.
⇒Unit Coversion: 1 g·cm ≈ 0.098 mN·m ≈ 0.014 oz·in;1 mm ≈ 0.039 in;1 g ≈ 0.035 oz1
High Torque NEMA 11 Geared Stepper Motor Mechanical Drawing
Unless otherwise stated, all dimensions are in millimeters. The provided drawings are for illustrative purposes; please contact us to verify precise specifications.

Note: The dimension “L2“/”L1” refers to the nema 11 geared stepper motor length specified in the performance parameter table above. Custom lengths or tailored selections are available upon request; please contact our engineering team for optimized solutions.
Development Samples:
If you need samples, please contact us.
Engineering & Manufacturing:
Contact any or the Sales Engineers for a quotation for production or consultation on the integration and customization of your product.
Payment:
1.Payment methods : Paypal, T/T
Shipping:
1.Delivery: DHL/FedEx 3-5 days.
2.Item will be shipped within 1-3 business days after the payment.
3.If you haven’t received the item on the Delivery Time, pls contact us by email if you have any questions. Normally, we will give you a reply within 24 hours, if not, pls check the spam of your email box. We will do our best to help you solve the problems.
4.Please make sure your address is matched with the finally shipping address before you pay.
FAQ for gear reducer stepper motor
Q:What is a Stepper Motor?
A:A stepper gear motor combines a stepper motor with a gearbox.It’s a brushless DC motor that moves in small, precise steps. You can set it to any position without a sensor. The gearbox then lets it drive heavier loads with slow, controlled movements.
If you want to know more about how stepper motor work, you can click on this link:Stepper motor – Wikipedia
Q:Can Stepper Gear Motor Be Customized?
A: Yes,stepper gear motor can be customized. TSL Motors, a top manufacturer, offers options to adjust torque, speed, and voltage. This ensures the motor meets the specific needs of your application.
Q: How do I place an order?
A: Send us an inquiry and we will send you a quote – make arrangements – confirm the sample – sign the contract/deposit mass production – delivery ready for delivery. Balance/delivery
Q: What about Sample Order?
A: Sample are available to you. Contact us for specifics. If we charge you a cost for the sample, you can take it at ease, as it will be the refund you receive when you make a formal order.
Q: If it is a customized version the information you provide, what should you include?
A: You should give the fundamental specifications of the motor, for example Dimensions Applications, Sizes as well as Voltage, Speed and Torque. It is better to provide an application-specific prototype drawing to us when you can.
Tap:If you request a quotation for mass production quantities, contact us for customizations and integration.
Motor Customization Guide
Please tell us your requirements. Our engineers will give you the best solution for your application.
✅Collaborate with Specialists
Our engineering team brings decades of motor technology expertise to every project.
✅Seamless Global Partnership
Communicating with us is a breeze.
We’ll adapt to your time zone, making sure that information and ideas are exchanged promptly.
Right from the start, you can rest assured that your thoughts are fully grasped.
Get In Touch
Start a discussion with our team today!









