Series SR-25
Price scales
| Quantity | Discount | Unit price |
| 1-9 | 0% off | $4.99 |
| 10-99 | 15% off | $4.24 |
| 100+ | 25% off | $3.74 |
Product description
SR-25
Specifications
Series SR25-783Kn : 81.5 kgf.cm4.5 kgf.cm78325 mm22.5 mm- Series SR25-524Kn : 81.5 kgf.cm4.5 kgf.cm52425 mm22.5 mm
- Series SR25-340Kn : 71.2 kgf.cm3.6 kgf.cm34025 mm22.5 mm
- Series SR25-228Kn : 71.2 kgf.cm3.6 kgf.cm22825 mm22.5 mm
- Series SR25-148Kn : 61.2 kgf.cm3.6 kgf.cm14825 mm18.5 mm
- Series SR25-99Kn : 61.0 kgf.cm3.0 kgf.cm9925 mm18.5 mm
- Series SR25-64Kn : 50.6 kgf.cm1.8 kgf.cm6425 mm18.5 mm
- Series SR25-43Kn : 50.6 kgf.cm1.8 kgf.cm4325 mm18.5 mm
- Series SR25-28Kn : 40.4 kgf.cm1.2 kgf.cm2825 mm14.5 mm
- Series SR25-19Kn : 40.4 kgf.cm1.2 kgf.cm1925 mm14.5 mm
- Series SR25-12Kn : 30.5 kgf.cm0.9 kgf.cm1225 mm14.5 mm
- Series SR25-8Kn : 30.5 kgf.cm0.9 kgf.cm825 mm14.5 mm
| Gearbox Characteristic Data | |
| Model | SR25 25mm Spur Gearbox |
| Gearbox housing material | Zinc Alloy （Die casting） |
| Gear material | Powder Metallurgy (Fe) / Plastics / Steel |
| Gear design | Helical Gear / Spur Gear |
| Bearing at output shaft | Sleeve Bearing |
| Lubricant in gearbox | FUMIO |
| Shaft axial load | ≤ 0.2 kgf |
| Radial load | ≤ 0.3 kgf |
| Axial play | ≤ 0.3 mm |
| Radial play | ≤ 0.05 mm |
| Backlash at no-load | ≤ 2° |
| Gear module | 0.4 M |
| Gearbox Value | |
| Gear ratio | 783 |
| Number of gear stage | 8 |
| Gearbox length | 22.5 mm |
| Max continuous torque | 1.5 kgf.cm |
| Instantaneous break torque | 4.5 kgf.cm |
| Gearbox efficiency | 40 % |
| Gearbox mass | 37 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2 |
| Operating temperature range | -20 ... 65 °C |
| Electrical characteristics | |
| Terminal resistance | |
| Terminal inductance | |
| Torque constant | |
| Speed constant | |
| Back-EMF constant | |
| Rotor inductance | |
| Rotor inertia | |
| Mechanical characteristics | |
| Weight | 103 g |
| Noise Level @ 30cm | 53 dB |
| Noise Level @ 50cm | 48 dB |
| Operating temperature range | -40℃-100℃ |
| Working Lifespan | 3000 hours |
| Gearbox Characteristic Data | |
| Model | SR25 25mm Spur Gearbox |
| Gearbox housing material | Zinc Alloy （Die casting） |
| Gear material | Powder Metallurgy (Fe) / Plastics / Steel |
| Gear design | Helical Gear / Spur Gear |
| Bearing at output shaft | Sleeve Bearing |
| Lubricant in gearbox | FUMIO |
| Shaft axial load | ≤ 0.2 kgf |
| Radial load | ≤ 0.3 kgf |
| Axial play | ≤ 0.3 mm |
| Radial play | ≤ 0.05 mm |
| Backlash at no-load | ≤ 2° |
| Gear module | 0.4 M |
| Gearbox Value | |
| Gear ratio | 524 |
| Number of gear stage | 8 |
| Gearbox length | 22.5 mm |
| Max continuous torque | 1.5 kgf.cm |
| Instantaneous break torque | 4.5 kgf.cm |
| Gearbox efficiency | 40 % |
| Gearbox mass | 37 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2 |
| Operating temperature range | -20 ... 65 °C |
| Electrical characteristics | |
| Terminal resistance | |
| Terminal inductance | |
| Torque constant | |
| Speed constant | |
| Back-EMF constant | |
| Rotor inductance | |
| Rotor inertia | |
| Mechanical characteristics | |
| Weight | 103 g |
| Noise Level @ 30cm | 53 dB |
| Noise Level @ 50cm | 48 dB |
| Operating temperature range | -40℃-100℃ |
| Working Lifespan | 3000 hours |
| Gearbox Characteristic Data | |
| Model | SR25 25mm Spur Gearbox |
| Gearbox housing material | Zinc Alloy （Die casting） |
| Gear material | Powder Metallurgy (Fe) / Plastics / Steel |
| Gear design | Helical Gear / Spur Gear |
| Bearing at output shaft | Sleeve Bearing |
| Lubricant in gearbox | FUMIO |
| Shaft axial load | ≤ 0.2 kgf |
| Radial load | ≤ 0.3 kgf |
| Axial play | ≤ 0.3 mm |
| Radial play | ≤ 0.05 mm |
| Backlash at no-load | ≤ 2° |
| Gear module | 0.4 M |
| Gearbox Value | |
| Gear ratio | 340 |
| Number of gear stage | 7 |
| Gearbox length | 22.5 mm |
| Max continuous torque | 1.2 kgf.cm |
| Instantaneous break torque | 3.6 kgf.cm |
| Gearbox efficiency | 50 % |
| Gearbox mass | 36 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2 |
| Operating temperature range | -20 ... 65 °C |
| Electrical characteristics | |
| Terminal resistance | |
| Terminal inductance | |
| Torque constant | |
| Speed constant | |
| Back-EMF constant | |
| Rotor inductance | |
| Rotor inertia | |
| Mechanical characteristics | |
| Weight | 103 g |
| Noise Level @ 30cm | 53 dB |
| Noise Level @ 50cm | 48 dB |
| Operating temperature range | -40℃-100℃ |
| Working Lifespan | 3000 hours |
| Gearbox Characteristic Data | |
| Model | SR25 25mm Spur Gearbox |
| Gearbox housing material | Zinc Alloy （Die casting） |
| Gear material | Powder Metallurgy (Fe) / Plastics / Steel |
| Gear design | Helical Gear / Spur Gear |
| Bearing at output shaft | Sleeve Bearing |
| Lubricant in gearbox | FUMIO |
| Shaft axial load | ≤ 0.2 kgf |
| Radial load | ≤ 0.3 kgf |
| Axial play | ≤ 0.3 mm |
| Radial play | ≤ 0.05 mm |
| Backlash at no-load | ≤ 2° |
| Gear module | 0.4 M |
| Gearbox Value | |
| Gear ratio | 228 |
| Number of gear stage | 7 |
| Gearbox length | 22.5 mm |
| Max continuous torque | 1.2 kgf.cm |
| Instantaneous break torque | 3.6 kgf.cm |
| Gearbox efficiency | 50 % |
| Gearbox mass | 36 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2 |
| Operating temperature range | -20 ... 65 °C |
| Electrical characteristics | |
| Terminal resistance | |
| Terminal inductance | |
| Torque constant | |
| Speed constant | |
| Back-EMF constant | |
| Rotor inductance | |
| Rotor inertia | |
| Mechanical characteristics | |
| Weight | 103 g |
| Noise Level @ 30cm | 53 dB |
| Noise Level @ 50cm | 48 dB |
| Operating temperature range | -40℃-100℃ |
| Working Lifespan | 3000 hours |
| Gearbox Characteristic Data | |
| Model | SR25 25mm Spur Gearbox |
| Gearbox housing material | Zinc Alloy （Die casting） |
| Gear material | Powder Metallurgy (Fe) / Plastics / Steel |
| Gear design | Helical Gear / Spur Gear |
| Bearing at output shaft | Sleeve Bearing |
| Lubricant in gearbox | FUMIO |
| Shaft axial load | ≤ 0.2 kgf |
| Radial load | ≤ 0.3 kgf |
| Axial play | ≤ 0.3 mm |
| Radial play | ≤ 0.05 mm |
| Backlash at no-load | ≤ 2° |
| Gear module | 0.4 M |
| Gearbox Value | |
| Gear ratio | 148 |
| Number of gear stage | 6 |
| Gearbox length | 18.5 mm |
| Max continuous torque | 1.2 kgf.cm |
| Instantaneous break torque | 3.6 kgf.cm |
| Gearbox efficiency | 50 % |
| Gearbox mass | 36 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2 |
| Operating temperature range | -20 ... 65 °C |
| Electrical characteristics | |
| Terminal resistance | |
| Terminal inductance | |
| Torque constant | |
| Speed constant | |
| Back-EMF constant | |
| Rotor inductance | |
| Rotor inertia | |
| Mechanical characteristics | |
| Weight | 103 g |
| Noise Level @ 30cm | 53 dB |
| Noise Level @ 50cm | 48 dB |
| Operating temperature range | -40℃-100℃ |
| Working Lifespan | 3000 hours |
| Gearbox Characteristic Data | |
| Model | SR25 25mm Spur Gearbox |
| Gearbox housing material | Zinc Alloy （Die casting） |
| Gear material | Powder Metallurgy (Fe) / Plastics / Steel |
| Gear design | Helical Gear / Spur Gear |
| Bearing at output shaft | Sleeve Bearing |
| Lubricant in gearbox | FUMIO |
| Shaft axial load | ≤ 0.2 kgf |
| Radial load | ≤ 0.3 kgf |
| Axial play | ≤ 0.3 mm |
| Radial play | ≤ 0.05 mm |
| Backlash at no-load | ≤ 2° |
| Gear module | 0.4 M |
| Gearbox Value | |
| Gear ratio | 99 |
| Number of gear stage | 6 |
| Gearbox length | 18.5 mm |
| Max continuous torque | 1.0 kgf.cm |
| Instantaneous break torque | 3.0 kgf.cm |
| Gearbox efficiency | 65 % |
| Gearbox mass | 35 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2 |
| Operating temperature range | -20 ... 65 °C |
| Electrical characteristics | |
| Terminal resistance | |
| Terminal inductance | |
| Torque constant | |
| Speed constant | |
| Back-EMF constant | |
| Rotor inductance | |
| Rotor inertia | |
| Mechanical characteristics | |
| Weight | 103 g |
| Noise Level @ 30cm | 53 dB |
| Noise Level @ 50cm | 48 dB |
| Operating temperature range | -40℃-100℃ |
| Working Lifespan | 3000 hours |
| Gearbox Characteristic Data | |
| Model | SR25 25mm Spur Gearbox |
| Gearbox housing material | Zinc Alloy （Die casting） |
| Gear material | Powder Metallurgy (Fe) / Plastics / Steel |
| Gear design | Helical Gear / Spur Gear |
| Bearing at output shaft | Sleeve Bearing |
| Lubricant in gearbox | FUMIO |
| Shaft axial load | ≤ 0.2 kgf |
| Radial load | ≤ 0.3 kgf |
| Axial play | ≤ 0.3 mm |
| Radial play | ≤ 0.05 mm |
| Backlash at no-load | ≤ 2° |
| Gear module | 0.4 M |
| Gearbox Value | |
| Gear ratio | 64 |
| Number of gear stage | 5 |
| Gearbox length | 18.5 mm |
| Max continuous torque | 0.6 kgf.cm |
| Instantaneous break torque | 1.8 kgf.cm |
| Gearbox efficiency | 65 % |
| Gearbox mass | 35 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2 |
| Operating temperature range | -20 ... 65 °C |
| Electrical characteristics | |
| Terminal resistance | |
| Terminal inductance | |
| Torque constant | |
| Speed constant | |
| Back-EMF constant | |
| Rotor inductance | |
| Rotor inertia | |
| Mechanical characteristics | |
| Weight | 103 g |
| Noise Level @ 30cm | 53 dB |
| Noise Level @ 50cm | 48 dB |
| Operating temperature range | -40℃-100℃ |
| Working Lifespan | 3000 hours |
| Gearbox Characteristic Data | |
| Model | SR25 25mm Spur Gearbox |
| Gearbox housing material | Zinc Alloy （Die casting） |
| Gear material | Powder Metallurgy (Fe) / Plastics / Steel |
| Gear design | Helical Gear / Spur Gear |
| Bearing at output shaft | Sleeve Bearing |
| Lubricant in gearbox | FUMIO |
| Shaft axial load | ≤ 0.2 kgf |
| Radial load | ≤ 0.3 kgf |
| Axial play | ≤ 0.3 mm |
| Radial play | ≤ 0.05 mm |
| Backlash at no-load | ≤ 2° |
| Gear module | 0.4 M |
| Gearbox Value | |
| Gear ratio | 43 |
| Number of gear stage | 5 |
| Gearbox length | 18.5 mm |
| Max continuous torque | 0.6 kgf.cm |
| Instantaneous break torque | 1.8 kgf.cm |
| Gearbox efficiency | 65 % |
| Gearbox mass | 35 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2 |
| Operating temperature range | -20 ... 65 °C |
| Electrical characteristics | |
| Terminal resistance | |
| Terminal inductance | |
| Torque constant | |
| Speed constant | |
| Back-EMF constant | |
| Rotor inductance | |
| Rotor inertia | |
| Mechanical characteristics | |
| Weight | 103 g |
| Noise Level @ 30cm | 53 dB |
| Noise Level @ 50cm | 48 dB |
| Operating temperature range | -40℃-100℃ |
| Working Lifespan | 3000 hours |
| Gearbox Characteristic Data | |
| Model | SR25 25mm Spur Gearbox |
| Gearbox housing material | Zinc Alloy （Die casting） |
| Gear material | Powder Metallurgy (Fe) / Plastics / Steel |
| Gear design | Helical Gear / Spur Gear |
| Bearing at output shaft | Sleeve Bearing |
| Lubricant in gearbox | FUMIO |
| Shaft axial load | ≤ 0.2 kgf |
| Radial load | ≤ 0.3 kgf |
| Axial play | ≤ 0.3 mm |
| Radial play | ≤ 0.05 mm |
| Backlash at no-load | ≤ 2° |
| Gear module | 0.4 M |
| Gearbox Value | |
| Gear ratio | 28 |
| Number of gear stage | 4 |
| Gearbox length | 14.5 mm |
| Max continuous torque | 0.4 kgf.cm |
| Instantaneous break torque | 1.2 kgf.cm |
| Gearbox efficiency | 73 % |
| Gearbox mass | 34 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2 |
| Operating temperature range | -20 ... 65 °C |
| Electrical characteristics | |
| Terminal resistance | |
| Terminal inductance | |
| Torque constant | |
| Speed constant | |
| Back-EMF constant | |
| Rotor inductance | |
| Rotor inertia | |
| Mechanical characteristics | |
| Weight | 103 g |
| Noise Level @ 30cm | 53 dB |
| Noise Level @ 50cm | 48 dB |
| Operating temperature range | -40℃-100℃ |
| Working Lifespan | 3000 hours |
| Gearbox Characteristic Data | |
| Model | SR25 25mm Spur Gearbox |
| Gearbox housing material | Zinc Alloy （Die casting） |
| Gear material | Powder Metallurgy (Fe) / Plastics / Steel |
| Gear design | Helical Gear / Spur Gear |
| Bearing at output shaft | Sleeve Bearing |
| Lubricant in gearbox | FUMIO |
| Shaft axial load | ≤ 0.2 kgf |
| Radial load | ≤ 0.3 kgf |
| Axial play | ≤ 0.3 mm |
| Radial play | ≤ 0.05 mm |
| Backlash at no-load | ≤ 2° |
| Gear module | 0.4 M |
| Gearbox Value | |
| Gear ratio | 19 |
| Number of gear stage | 4 |
| Gearbox length | 14.5 mm |
| Max continuous torque | 0.4 kgf.cm |
| Instantaneous break torque | 1.2 kgf.cm |
| Gearbox efficiency | 73 % |
| Gearbox mass | 34 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2 |
| Operating temperature range | -20 ... 65 °C |
| Electrical characteristics | |
| Terminal resistance | |
| Terminal inductance | |
| Torque constant | |
| Speed constant | |
| Back-EMF constant | |
| Rotor inductance | |
| Rotor inertia | |
| Mechanical characteristics | |
| Weight | 103 g |
| Noise Level @ 30cm | 53 dB |
| Noise Level @ 50cm | 48 dB |
| Operating temperature range | -40℃-100℃ |
| Working Lifespan | 3000 hours |
| Gearbox Characteristic Data | |
| Model | SR25 25mm Spur Gearbox |
| Gearbox housing material | Zinc Alloy （Die casting） |
| Gear material | Powder Metallurgy (Fe) / Plastics / Steel |
| Gear design | Helical Gear / Spur Gear |
| Bearing at output shaft | Sleeve Bearing |
| Lubricant in gearbox | FUMIO |
| Shaft axial load | ≤ 0.2 kgf |
| Radial load | ≤ 0.3 kgf |
| Axial play | ≤ 0.3 mm |
| Radial play | ≤ 0.05 mm |
| Backlash at no-load | ≤ 2° |
| Gear module | 0.4 M |
| Gearbox Value | |
| Gear ratio | 12 |
| Number of gear stage | 3 |
| Gearbox length | 14.5 mm |
| Max continuous torque | 0.3 kgf.cm |
| Instantaneous break torque | 0.9 kgf.cm |
| Gearbox efficiency | 81 % |
| Gearbox mass | 33 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2 |
| Operating temperature range | -20 ... 65 °C |
| Electrical characteristics | |
| Terminal resistance | |
| Terminal inductance | |
| Torque constant | |
| Speed constant | |
| Back-EMF constant | |
| Rotor inductance | |
| Rotor inertia | |
| Mechanical characteristics | |
| Weight | 103 g |
| Noise Level @ 30cm | 53 dB |
| Noise Level @ 50cm | 48 dB |
| Operating temperature range | -40℃-100℃ |
| Working Lifespan | 3000 hours |
| Gearbox Characteristic Data | |
| Model | SR25 25mm Spur Gearbox |
| Gearbox housing material | Zinc Alloy （Die casting） |
| Gear material | Powder Metallurgy (Fe) / Plastics / Steel |
| Gear design | Helical Gear / Spur Gear |
| Bearing at output shaft | Sleeve Bearing |
| Lubricant in gearbox | FUMIO |
| Shaft axial load | ≤ 0.2 kgf |
| Radial load | ≤ 0.3 kgf |
| Axial play | ≤ 0.3 mm |
| Radial play | ≤ 0.05 mm |
| Backlash at no-load | ≤ 2° |
| Gear module | 0.4 M |
| Gearbox Value | |
| Gear ratio | 8 |
| Number of gear stage | 3 |
| Gearbox length | 14.5 mm |
| Max continuous torque | 0.3 kgf.cm |
| Instantaneous break torque | 0.9 kgf.cm |
| Gearbox efficiency | 81 % |
| Gearbox mass | 33 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2 |
| Operating temperature range | -20 ... 65 °C |
| Electrical characteristics | |
| Terminal resistance | |
| Terminal inductance | |
| Torque constant | |
| Speed constant | |
| Back-EMF constant | |
| Rotor inductance | |
| Rotor inertia | |
| Mechanical characteristics | |
| Weight | 103 g |
| Noise Level @ 30cm | 53 dB |
| Noise Level @ 50cm | 48 dB |
| Operating temperature range | -40℃-100℃ |
| Working Lifespan | 3000 hours |
Technical illustrations
Dimensional Drawing
Characteristic curves
Your Choice
Selected Variant
SR25-783K
Key Features
| Gear stage: | n : 8 |
| Continuous input torque: | 1.5 kgf.cm |
| Gear breaking torque: | 4.5 kgf.cm |
| Gear ratio: | 783 |
| Diameter : | 25 mm |
| Length: | 22.5 mm |
Selected Variant
SR25-524K
Key Features
| Gear stage: | n : 8 |
| Continuous input torque: | 1.5 kgf.cm |
| Gear breaking torque: | 4.5 kgf.cm |
| Gear ratio: | 524 |
| Diameter : | 25 mm |
| Length: | 22.5 mm |
Selected Variant
SR25-340K
Key Features
| Gear stage: | n : 7 |
| Continuous input torque: | 1.2 kgf.cm |
| Gear breaking torque: | 3.6 kgf.cm |
| Gear ratio: | 340 |
| Diameter : | 25 mm |
| Length: | 22.5 mm |
Selected Variant
SR25-228K
Key Features
| Gear stage: | n : 7 |
| Continuous input torque: | 1.2 kgf.cm |
| Gear breaking torque: | 3.6 kgf.cm |
| Gear ratio: | 228 |
| Diameter : | 25 mm |
| Length: | 22.5 mm |
Selected Variant
SR25-148K
Key Features
| Gear stage: | n : 6 |
| Continuous input torque: | 1.2 kgf.cm |
| Gear breaking torque: | 3.6 kgf.cm |
| Gear ratio: | 148 |
| Diameter : | 25 mm |
| Length: | 18.5 mm |
Selected Variant
SR25-99K
Key Features
| Gear stage: | n : 6 |
| Continuous input torque: | 1.0 kgf.cm |
| Gear breaking torque: | 3.0 kgf.cm |
| Gear ratio: | 99 |
| Diameter : | 25 mm |
| Length: | 18.5 mm |
Selected Variant
SR25-64K
Key Features
| Gear stage: | n : 5 |
| Continuous input torque: | 0.6 kgf.cm |
| Gear breaking torque: | 1.8 kgf.cm |
| Gear ratio: | 64 |
| Diameter : | 25 mm |
| Length: | 18.5 mm |
Selected Variant
SR25-43K
Key Features
| Gear stage: | n : 5 |
| Continuous input torque: | 0.6 kgf.cm |
| Gear breaking torque: | 1.8 kgf.cm |
| Gear ratio: | 43 |
| Diameter : | 25 mm |
| Length: | 18.5 mm |
Selected Variant
SR25-28K
Key Features
| Gear stage: | n : 4 |
| Continuous input torque: | 0.4 kgf.cm |
| Gear breaking torque: | 1.2 kgf.cm |
| Gear ratio: | 28 |
| Diameter : | 25 mm |
| Length: | 14.5 mm |
Selected Variant
SR25-19K
Key Features
| Gear stage: | n : 4 |
| Continuous input torque: | 0.4 kgf.cm |
| Gear breaking torque: | 1.2 kgf.cm |
| Gear ratio: | 19 |
| Diameter : | 25 mm |
| Length: | 14.5 mm |
Selected Variant
SR25-12K
Key Features
| Gear stage: | n : 3 |
| Continuous input torque: | 0.5 kgf.cm |
| Gear breaking torque: | 0.9 kgf.cm |
| Gear ratio: | 12 |
| Diameter : | 25 mm |
| Length: | 14.5 mm |
Selected Variant
SR25-8K
Key Features
| Gear stage: | n : 3 |
| Continuous input torque: | 0.5 kgf.cm |
| Gear breaking torque: | 0.9 kgf.cm |
| Gear ratio: | 8 |
| Diameter : | 25 mm |
| Length: | 14.5 mm |