Stepper Motor: Bipolar, 200 Steps/Rev, 20×30mm, 3.9V, 0.6 A/Phase vs 131:1 Metal Gearmotor 37Dx73L mm 12V with 64 CPR Encoder (Helical Pinion)
Stepper Motor: Bipolar, 200 Steps/Rev, 20×30mm, 3.9V, 0.6 A/Phase and 131:1 Metal Gearmotor 37Dx73L mm 12V with 64 CPR Encoder (Helical Pinion) are compared below on the data published by their sellers — price converted to euros, stock, and every specification either seller discloses. On price, Stepper Motor: Bipolar, 200 Steps/Rev, 20×30mm, 3.9V, 0.6 A/Phase is €17.01 cheaper ($41.32).
| Criterion |  Stepper Motor: Bipolar, 200 Steps/Rev, 20×30mm, 3.9V, 0.6 A/Phase |  131:1 Metal Gearmotor 37Dx73L mm 12V with 64 CPR Encoder (Helical Pinion) |
|---|---|---|
| Price | $41.32cheapest | $60.95 |
| Seller | Pololu | Pololu |
| Availability | In stock | In stock |
| Rating | — | — |
| Current | 0.6 A | — |
| Current max. | — | 0.74 A |
| Resistance | 6.5 Ω | — |
| Voltage | 3.9 V | 12 V |
| Dimensions | 20×30mm | — |
| Torque max. | — | 6 kg·cm |
| Weight | 60 g | 210 g |
| Encoder resolution | — | 64 CPR |
| Encoders | — | Yes |
| Gear ratio | — | 131.25:1 |
| Holding torque | 2.5 oz·in | — |
| Inductance per phase | 1.7 mH | — |
| Lead length | 30 cm | 20 cm |
| Max efficiency 12v | — | 45 % |
| Max output power 12v | — | 6 W |
| Motor type | — | 12 V |
| Nema size | 8 | — |
| No load current 12v | — | 0.2 A |
| No load current 6v | — | 0.15 A |
| No load speed 12v | — | 76 rpm |
| No load speed 6v | — | 38 rpm |
| Number of leads | 4 | — |
| Output power at max efficiency | — | 4.1 W |
| Shaft diameter | 4 mm | 6 mm |
| Shaft type | 4 mm "D" | — |
| Size | 20 mm square × 30 mm | 37D × 72.5L mm |
| Speed at max efficiency | — | 66 rpm |
| Stall current 12v | — | 5.5 A |
| Stall current 6v | — | 3 A |
| Stall torque 12v | — | 45 kg·cm |
| Stall torque 6v | — | 28 kg·cm |
| Steps per revolution | 200 | — |
| View at seller ↗ | View at seller ↗ |
Specifications are extracted automatically from seller data — an empty cell means the seller does not publish that value, not that the product lacks it.
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