3115 Brushless Motor
The Atlas 3115 brushless motor is available in three KV options for drone, robotic and custom motion applications. The 850 and 950 KV versions operate from a 4S–8S supply, while the 1100 KV version operates from a 4S–6S supply. Peak current ratings range from 50 to 65 A for 10 seconds in still air.
All three versions feature a 31 mm stator with a 15 mm stack height and share the same external dimensions and mounting arrangement. Weights range from 116 to 125 g, depending on the winding option. A 5 mm threaded shaft and four M3 mounting holes provide mechanical integration.
The motors are supplied in packs of four, with volume orders available directly from Atlas.
Specifications:
| 850 KV | 950 KV | 1100 KV | |
| Overall diameter | 37.80 mm | 37.80 mm | 37.80 mm |
| Overall height excluding propeller shaft | 31.00 mm | 31.00 mm | 31.00 mm |
| Motor weight | 116 g | 118 g | 125 g |
| KV (ESC-driven no-load, six-step commutation) | 850 RPM/V | 950 RPM/V | 1100 RPM/V |
| Rated voltage | 4S–8S | 4S–8S | 4S–6S |
| Peak current (10 seconds, still air) | 50 A | 61 A | 65 A |
| Idle current at 10 V | 0.75 A | 0.9 A | 1.3 A |
| Line-to-line resistance including 150 mm leads | 50 mΩ | 40 mΩ | 30 mΩ |
| Mounting-hole spacing | 19.00 mm | 19.00 mm | 19.00 mm |
| Mounting holes | 4 × M3 × 0.5 | 4 × M3 × 0.5 | 4 × M3 × 0.5 |
| Base height | 4.00 mm | 4.00 mm | 4.00 mm |
| Stator diameter | 31 mm | 31 mm | 31 mm |
| Stator stack height | 15 mm | 15 mm | 15 mm |
| Shaft diameter | 5 mm | 5 mm | 5 mm |
| Shaft thread | 5 × 0.8 mm | 5 × 0.8 mm | 5 × 0.8 mm |
| Shaft length | 15 mm | 15 mm | 15 mm |
