SR28395 DC Gearmotors - Round
SR28395 Series
The SR28-DC395 uses a DC395 brushed motor and a 28 mm round spur gearbox. Its gearbox body is listed at 22.5 mm long, with a 4 mm output shaft.
Product Highlights
- Motor voltages: 12 V, 24 V
- Listed gear ratios: 8–108:1
- Gearbox diameter: 28 mm
- Output shaft diameter: 4 mm
Customization Available
- Custom output shaft dimensions and features
- Motor voltage and winding options
- Gear ratios
- Mounting and mechanical integration
Shop NowProduct Specifications
| Model | SR28395-124500-8K | SR28395-124500-12K | SR28395-124500-24K | SR28395-124500-36K | SR28395-124500-48K | SR28395-124500-72K | SR28395-124500-108K | SR28395-126000-8K | SR28395-126000-12K | SR28395-126000-24K | SR28395-126000-36K | SR28395-126000-48K | SR28395-126000-72K | SR28395-126000-108K | SR28395-244500-8K | SR28395-244500-12K | SR28395-244500-24K | SR28395-244500-36K | SR28395-244500-48K | SR28395-244500-72K | SR28395-244500-108K | SR28395-246000-8K | SR28395-246000-12K | SR28395-246000-24K | SR28395-246000-36K | SR28395-246000-48K | SR28395-246000-72K | SR28395-246000-108K |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Gearbox Type | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round | Spur Gearbox - Round |
| Series Model | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 | SR28395 |
| Combination Display Model | SR28395-124500-8K | SR28395-124500-12K | SR28395-124500-24K | SR28395-124500-36K | SR28395-124500-48K | SR28395-124500-72K | SR28395-124500-108K | SR28395-126000-8K | SR28395-126000-12K | SR28395-126000-24K | SR28395-126000-36K | SR28395-126000-48K | SR28395-126000-72K | SR28395-126000-108K | SR28395-244500-8K | SR28395-244500-12K | SR28395-244500-24K | SR28395-244500-36K | SR28395-244500-48K | SR28395-244500-72K | SR28395-244500-108K | SR28395-246000-8K | SR28395-246000-12K | SR28395-246000-24K | SR28395-246000-36K | SR28395-246000-48K | SR28395-246000-72K | SR28395-246000-108K |
| Theoretical Assembly Net Weight (kg) | 0.16 | 0.16 | 0.161 | 0.161 | 0.162 | 0.162 | 0.162 | 0.16 | 0.16 | 0.161 | 0.161 | 0.162 | 0.162 | 0.162 | 0.16 | 0.16 | 0.161 | 0.161 | 0.162 | 0.162 | 0.162 | 0.16 | 0.16 | 0.161 | 0.161 | 0.162 | 0.162 | 0.162 |
| Gearbox Weight (kg) | 0.057 | 0.057 | 0.058 | 0.058 | 0.059 | 0.059 | 0.059 | 0.057 | 0.057 | 0.058 | 0.058 | 0.059 | 0.059 | 0.059 | 0.057 | 0.057 | 0.058 | 0.058 | 0.059 | 0.059 | 0.059 | 0.057 | 0.057 | 0.058 | 0.058 | 0.059 | 0.059 | 0.059 |
| Measured Assembly Net Weight (kg) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Rated Voltage (V) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 |
| No Load Speed (rpm) | 563 | 375 | 188 | 125 | 94 | 63 | 42 | 750 | 500 | 250 | 167 | 125 | 83 | 56 | 563 | 375 | 188 | 125 | 94 | 63 | 42 | 750 | 500 | 250 | 167 | 125 | 83 | 56 |
| Motor Rated-Point Output Speed (Reference) (rpm) | 484.88 | 323.25 | 161.63 | 107.75 | 80.81 | 53.88 | 35.92 | 669.88 | 446.58 | 223.29 | 148.86 | 111.65 | 74.43 | 49.62 | 498.75 | 332.50 | 166.25 | 110.83 | 83.13 | 55.42 | 36.94 | 650.00 | 433.33 | 216.67 | 144.44 | 108.33 | 72.22 | 48.15 |
| No Load Current (mA) | 110 | 110 | 110 | 110 | 110 | 110 | 110 | 180 | 180 | 180 | 180 | 180 | 180 | 180 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 300 | 300 | 300 | 300 | 300 | 300 | 300 |
| Rated Current (mA) | 470 | 470 | 470 | 470 | 470 | 470 | 470 | 770 | 770 | 770 | 770 | 770 | 770 | 770 | 270 | 270 | 270 | 270 | 270 | 270 | 270 | 490 | 490 | 490 | 490 | 490 | 490 | 490 |
| Stall Current (mA) | 2650 | 2650 | 2650 | 2650 | 2650 | 2650 | 2650 | 4610 | 4610 | 4610 | 4610 | 4610 | 4610 | 4610 | 1530 | 1530 | 1530 | 1530 | 1530 | 1530 | 1530 | 2720 | 2720 | 2720 | 2720 | 2720 | 2720 | 2720 |
| Motor Rated-Point Output Torque (Reference) (mN·m) | 54.41 | 81.61 | 147.57 | 221.36 | 263.84 | 395.76 | 593.64 | 68.15 | 102.23 | 184.85 | 277.28 | 330.49 | 495.74 | 743.61 | 59.56 | 89.34 | 161.55 | 242.33 | 288.83 | 433.25 | 649.87 | 80.18 | 120.27 | 217.47 | 326.21 | 388.81 | 583.22 | 874.83 |
| Theoretical Stall Output Torque (Reference) (mN·m) | 368.25 | 552.38 | 998.82 | 1498.23 | 1785.77 | 2678.65 | 4017.98 | 485.08 | 727.63 | 1315.71 | 1973.56 | 2352.33 | 3528.49 | 5292.73 | 413.50 | 620.24 | 1121.54 | 1682.30 | 2005.17 | 3007.75 | 4511.63 | 557.25 | 835.87 | 1511.43 | 2267.15 | 2702.26 | 4053.39 | 6080.08 |
| Motor Rated-Point Output Power (Reference) (W) | 2.763 | 2.763 | 2.498 | 2.498 | 2.233 | 2.233 | 2.233 | 4.781 | 4.781 | 4.322 | 4.322 | 3.864 | 3.864 | 3.864 | 3.111 | 3.111 | 2.813 | 2.813 | 2.514 | 2.514 | 2.514 | 5.458 | 5.458 | 4.934 | 4.934 | 4.411 | 4.411 | 4.411 |
| Estimated Combination Efficiency (%) | 54.75 | 54.75 | 49.50 | 49.50 | 44.25 | 44.25 | 44.25 | 54.75 | 54.75 | 49.50 | 49.50 | 44.25 | 44.25 | 44.25 | 54.75 | 54.75 | 49.50 | 49.50 | 44.25 | 44.25 | 44.25 | 54.75 | 54.75 | 49.50 | 49.50 | 44.25 | 44.25 | 44.25 |
| Measured Assembly Efficiency (%) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Direction Of Rotation | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW | CW/CCW |
| Motor Diameter (mm) | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 | 27.8 |
| Gearbox Diameter (mm) | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Gearbox Length (mm) | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 | 22.5 |
| Component Body Length Sum (Reference) (mm) | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 | 69 |
| Assembly Axial Length (Drawing / Measured) (mm) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Output Shaft Diameter (mm) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 |
| Gear Ratio (:1) | 8 | 12 | 24 | 36 | 48 | 72 | 108 | 8 | 12 | 24 | 36 | 48 | 72 | 108 | 8 | 12 | 24 | 36 | 48 | 72 | 108 | 8 | 12 | 24 | 36 | 48 | 72 | 108 |
| Number Of Gear Stages | 3 | 3 | 4 | 4 | 5 | 5 | 5 | 3 | 3 | 4 | 4 | 5 | 5 | 5 | 3 | 3 | 4 | 4 | 5 | 5 | 5 | 3 | 3 | 4 | 4 | 5 | 5 | 5 |
| Max Continuous Torque (mN·m) | 49.03 | 49.03 | 98.07 | 98.07 | 117.68 | 117.68 | 117.68 | 49.03 | 49.03 | 98.07 | 98.07 | 117.68 | 117.68 | 117.68 | 49.03 | 49.03 | 98.07 | 98.07 | 117.68 | 117.68 | 117.68 | 49.03 | 49.03 | 98.07 | 98.07 | 117.68 | 117.68 | 117.68 |
| Motor Torque at Gearbox Continuous Limit (Reference) (mN·m) | 8.40 | 5.60 | 6.19 | 4.13 | 4.16 | 2.77 | 1.85 | 8.40 | 5.60 | 6.19 | 4.13 | 4.16 | 2.77 | 1.85 | 8.40 | 5.60 | 6.19 | 4.13 | 4.16 | 2.77 | 1.85 | 8.40 | 5.60 | 6.19 | 4.13 | 4.16 | 2.77 | 1.85 |
| Gearbox Allowable Intermittent Torque (mN·m) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Gearbox Breaking Torque (Destructive Limit) (mN·m) | 147.10 | 147.10 | 294.20 | 294.20 | 353.04 | 353.04 | 353.04 | 147.10 | 147.10 | 294.20 | 294.20 | 353.04 | 353.04 | 353.04 | 147.10 | 147.10 | 294.20 | 294.20 | 353.04 | 353.04 | 353.04 | 147.10 | 147.10 | 294.20 | 294.20 | 353.04 | 353.04 | 353.04 |
| Backlash (°) | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Component Temperature Intersection (Reference) (°C) | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 | -30 ~ 65 |
| Working Lifespan (hours) | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 | 400 |
| Noise Level @ 30cm (dB) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |