73:1 Metal Gearmotor 20Dx42L mm (Short Output Shaft) vs 172:1 Metal Gearmotor 25Dx71L mm LP 6V with 48 CPR Encoder
73:1 Metal Gearmotor 20Dx42L mm (Short Output Shaft) and 172:1 Metal Gearmotor 25Dx71L mm LP 6V with 48 CPR Encoder are compared below on the data published by their sellers — price converted to euros, stock, and every specification either seller discloses. On price, 73:1 Metal Gearmotor 20Dx42L mm (Short Output Shaft) is €19.06 cheaper ($31.95).
| Criterion |  73:1 Metal Gearmotor 20Dx42L mm (Short Output Shaft) |  172:1 Metal Gearmotor 25Dx71L mm LP 6V with 48 CPR Encoder |
|---|---|---|
| Price | $31.95cheapest | $53.95 |
| Seller | Pololu | Pololu |
| Availability | In stock | In stock |
| Rating | — | — |
| Current max. | — | 0.33 A |
| Voltage | — | 6 V |
| Torque max. | — | 2.1 kg·cm |
| Weight | 43 g | 106 g |
| Encoders | — | Yes |
| Gear ratio | 73:1 | 171.79:1 |
| Lead length | — | 8 in |
| Max efficiency 6v | — | 31 % |
| Max output power 6v | — | 1.2 W |
| Motor type | — | ​6V, 2.0A stall (LP 6V) |
| No load current 6v | 250 mA | 0.12 A |
| No load speed 6v | 180 rpm | 35 rpm |
| Output power at max efficiency | — | 0.63 W |
| Shaft diameter | 4 mm | 4 mm |
| Size | 20D x 44L mm | 25D x 71L mm |
| Speed at max efficiency | — | 29 rpm |
| Stall current 6v | 3 200 mA | 2 A |
| Stall torque 6v | 60 oz·in | 14 kg·cm |
| 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.
Robotitem does not test products. This comparison reports seller-published data only, and ranking never takes affiliate commission into account.