NTM Prop Drive motors are rock-solid performance outrunners with tight windings, quality bearings, correctly rated magnets, balanced stator and flux rings, tool-steel shafts plus they are QC checked at 14 points, from material processing all the way through to final dyno test.

Because we design and build these motors completely in-house (from 3D/2D drawing to materials sourcing, machining, balancing, final assembly and dyno) we can completely control production and ensure product consistency from design right through to shipping the product to you. The removal of middle-men has meant we can drive better value to the market and retail these motors at factory(our) prices! All performance figures are real and tested on our own motor dynos.

Our QC engineer checks and balances each motor before shipping to the HobbyKing.com warehouse. 
 
Specs:
Model: 4258-500
Kv: 500kv
Turns: 6T
Poles: 7
Resistance: 0.144 Ω
No Load current: 1.6A @ 10v
Max current: 60A
Max Power: 1300W
Shaft: 5mm
Weight: 319g
Bolt holes: 25mm
Bolt thread: M3
ESC: 70A
Cell count: 5~7 Lipoly


Prop Test Data:
15x8 - 14.8v - 421W - 28.5A
15x8 - 18.5v - 760W - 41.1A
15x8 - 22.2v - 1256W - 56.6A
16x10 - 14.8V - 669W - 45.2A
16x10 - 18.5V - 1160W - 62.7A
16x10 - 22.2V - 1885W - 84.9A