Series SG-28
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
SG-28
Specifications
Series SR28-108Kn : 51.2 kgf.cm3.6 kgf.cm10828 mm20.5 mm- Series SR28-72Kn : 51.2 kgf.cm3.6 kgf.cm7228 mm20.5 mm
- Series SR28-48Kn : 51.2 kgf.cm3.6 kgf.cm4828 mm20.5 mm
- Series SR28-36Kn : 41.0 kgf.cm3.0 kgf.cm3628 mm20.5 mm
- Series SR28-24Kn : 41.0 kgf.cm3.0 kgf.cm2428 mm20.5 mm
- Series SR28-12Kn : 30.5 kgf.cm1.5 kgf.cm1228 mm20.5 mm
- Series SR28-8Kn : 30.5 kgf.cm1.5 kgf.cm828 mm20.5 mm
| Gearbox Characteristic Data | |
| Model | SR28 28mm 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 | ≤ 0.4 kgf |
| Radial load | ≤ 0.5 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 | 108 |
| Number of gear stage | 5 |
| Gearbox length | 20.5 mm |
| Max continuous torque | 1.2 kgf.cm |
| Instantaneous break torque | 3.6 kgf.cm |
| Gearbox efficiency | 59 % |
| Gearbox mass | 34 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2.3 |
| 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 | SR28 28mm 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 | ≤ 0.4 kgf |
| Radial load | ≤ 0.5 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 | 72 |
| Number of gear stage | 5 |
| Gearbox length | 20.5 mm |
| Max continuous torque | 1.2 kgf.cm |
| Instantaneous break torque | 3.6 kgf.cm |
| Gearbox efficiency | 59 % |
| Gearbox mass | 34 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2.3 |
| 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 | SR28 28mm 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 | ≤ 0.4 kgf |
| Radial load | ≤ 0.5 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 | 48 |
| Number of gear stage | 5 |
| Gearbox length | 20.5 mm |
| Max continuous torque | 1.2 kgf.cm |
| Instantaneous break torque | 3.6 kgf.cm |
| Gearbox efficiency | 59 % |
| Gearbox mass | 34 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2.3 |
| 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 | SR28 28mm 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 | ≤ 0.4 kgf |
| Radial load | ≤ 0.5 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 | 36 |
| Number of gear stage | 4 |
| Gearbox length | 20.5 mm |
| Max continuous torque | 1.0 kgf.cm |
| Instantaneous break torque | 3.0 kgf.cm |
| Gearbox efficiency | 66 % |
| Gearbox mass | 34 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2.3 |
| 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 | SR28 28mm 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 | ≤ 0.4 kgf |
| Radial load | ≤ 0.5 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 | 24 |
| Number of gear stage | 4 |
| Gearbox length | 20.5 mm |
| Max continuous torque | 1.0 kgf.cm |
| Instantaneous break torque | 3.0 kgf.cm |
| Gearbox efficiency | 66 % |
| Gearbox mass | 34 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2.3 |
| 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 | SR28 28mm 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 | ≤ 0.4 kgf |
| Radial load | ≤ 0.5 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 | 20.5 mm |
| Max continuous torque | 0.5 kgf.cm |
| Instantaneous break torque | 1.5 kgf.cm |
| Gearbox efficiency | 73 % |
| Gearbox mass | 33 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2.3 |
| 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 | SR28 28mm 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 | ≤ 0.4 kgf |
| Radial load | ≤ 0.5 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 | 20.5 mm |
| Max continuous torque | 0.5 kgf.cm |
| Instantaneous break torque | 1.5 kgf.cm |
| Gearbox efficiency | 81 % |
| Gearbox mass | 33 g |
| Output shaft diameter | 4 mm |
| Pinion hole diameter | φ 2.3 |
| 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
SR28-108K
Key Features
| Gear stage: | n : 5 |
| Continuous input torque: | 1.2 kgf.cm |
| Gear breaking torque: | 3.6 kgf.cm |
| Gear ratio: | 108 |
| Diameter : | 28 mm |
| Length: | 20.5 mm |
Selected Variant
SR28-72K
Key Features
| Gear stage: | n : 5 |
| Continuous input torque: | 1.2 kgf.cm |
| Gear breaking torque: | 3.6 kgf.cm |
| Gear ratio: | 72 |
| Diameter : | 28 mm |
| Length: | 20.5 mm |
Selected Variant
SR28-48K
Key Features
| Gear stage: | n : 5 |
| Continuous input torque: | 1.2 kgf.cm |
| Gear breaking torque: | 3.6 kgf.cm |
| Gear ratio: | 48 |
| Diameter : | 28 mm |
| Length: | 20.5 mm |
Selected Variant
SR28-36K
Key Features
| Gear stage: | n : 4 |
| Continuous input torque: | 1.0 kgf.cm |
| Gear breaking torque: | 3.0 kgf.cm |
| Gear ratio: | 36 |
| Diameter : | 28 mm |
| Length: | 20.5 mm |
Selected Variant
SR28-24K
Key Features
| Gear stage: | n : 4 |
| Continuous input torque: | 1.0 kgf.cm |
| Gear breaking torque: | 3.0 kgf.cm |
| Gear ratio: | 24 |
| Diameter : | 28 mm |
| Length: | 20.5 mm |
Selected Variant
SR28-12K
Key Features
| Gear stage: | n : 3 |
| Continuous input torque: | 0.5 kgf.cm |
| Gear breaking torque: | 1.5 kgf.cm |
| Gear ratio: | 12 |
| Diameter : | 28 mm |
| Length: | 20.5 mm |
Selected Variant
SR28-8K
Key Features
| Gear stage: | n : 3 |
| Continuous input torque: | 0.5 kgf.cm |
| Gear breaking torque: | 1.5 kgf.cm |
| Gear ratio: | 8 |
| Diameter : | 28 mm |
| Length: | 20.5 mm |