TNR28 Mini Planetary Gearbox Speed Reducer 4:1-70:1 for Nema 11 28mm Stepper Motors 5mm Input
TNR28 Mini Planetary Gearbox Speed Reducer 4:1-70:1 for Nema 11 28mm Stepper Motors 5mm Input Keyway
Features:
Compatible with NEMA11 (28mm) Stepper Motors
5mm Input Shaft for NEMA11 Stepper Motors
Low Backlash: ≤15arcmin (L1) / ≤20arcmin (L2)
10 Available Gear Ratios from 4:1 to 70:1
Compact 28×28mm Frame Size
Planetary Gear Transmission
IP54 Dust and Water Protection
Specifications:
Rated Output Torque: 1–2Nm (L1) / 3–4Nm (L2)
Max. Output Torque: 2–4Nm (L1) / 6–8Nm (L2)
Gearbox Length: 33mm (L1) / 41.5mm (L2)
Rated Input Speed: 1000rpm
Max. Input Speed: 2000rpm
Max. Radial Load: 300N
Max. Axial Load: 100N
Full Load Efficiency: ≥96% (L1) / ≥94% (L2)
Moment of Inertia: 0.01–0.018kg·cm²
Noise Level: 55dB
Service Life: 20000h
Operating Temperature: -20°C to +150°C
Installation Method: Any Orientation
Lubrication: Lifetime Lubrication
L1 Reduction Ratios: 4:1, 5:1, 7:1, 10:1
L2 Reduction Ratios: 20:1, 25:1, 30:1, 35:1, 40:1, 50:1, 70:1
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| Gearbox Specification | |
|---|---|
| Matching Motor Size | Nema 11 |
| Input Shaft Diameter(mm) | 5 |
| Output Shaft Type | Keyway |
| Frame Size(mm) | 28 × 28 |
| Gear Backlash(Max. °) | ≤15arcmin / ≤20arcmin |
| Gear Ratio | 4:1 / 5:1 / 7:1 / 10:1 / 20:1 / 25:1 / 30:1 / 35:1 / 40:1 / 70:1 |
| Gearbox Type | Planetary Gearbox |
