Brushless motors
Explore 2207, 2810, 3110, 4125, 5315 and 6215 brushless motors. Compare KV ratings, weights and mounting structures. Each model is tested with a specified power supply and propeller combination; check these against your aircraft requirements when selecting a motor.
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Brushless motor models and mounting specifications
Specifications are compiled from the corresponding product documentation. Similar model names or identical KV ratings do not mean the same mounting dimensions, test results or applications.
| Model and details | KV | Weight and definition | Mounting holes | Approx. outer diameter × overall length |
|---|---|---|---|---|
| 2207 | 1960KV | 33.35g (including wires) | 4-M3 | Ø27 × 31.9mm |
| 2810 | 900KV | 65.15g (including wires) | 4-M3 | Ø33.2 × 39.2mm |
| 3110 | 900KV | 81.78g (including wires) | 4-M3 | Ø37 × 41.2mm |
| 4125 | 490KV | 354g (including wires) | 4-M4 | Ø50 × 73.5mm |
| 5315 | 300KV | 335g (per unit) | 4-M4 | Ø59.8 × 58.2mm |
| 6215 | 200KV | 376.03g (including wires) | 4-M4 | Ø69.4 × 59.5mm |
The confirmed unit weight of the 5315 is 335g; the documentation does not specify whether this includes wires. To calculate the total installed weight, confirm the actual wiring and supply configuration. Mounting hole labels do not replace a complete engineering drawing. Check hole spacing, shaft ends and fasteners before assembly.
How should propulsion test records be compared?
Check voltage, propeller and throttle conditions together before comparing current, thrust and other records. Results from different test combinations cannot be ranked solely by maximum thrust. Test thrust is not an aircraft payload rating, and peak test values are not continuous rated outputs.
For example,4125 490KV has a measured current of 70.48A under the test conditions of a 6S supply, GF 15×8E propeller, 100% throttle and 23.46V. This is not its continuous rated current. Other configurations still require assessment of power supply, cooling and load.
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