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NTM Prop Drive Series 28-30A 750kv / 140w (USA Warehouse)
NTM Prop Drive motors are rock-solid performance outrunners with tight windings, quality bearings, correctly rated magnets, balanced stator and flux rings 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. Perfect Kv and size for quadcopters!
Our QC engineers check and balance each motor before shipping to the HobbyKing.com warehouse.
Hi Guys, I am trying this motor on a HK X525 V3 Quad frame, the shaft interferes with the landing claw. Can the shaft be shortened? I noticed that HK has a short-shaft 28-26A
Thanks
Remove the retaining clip and pull the can off. Then set the can up in a vice and cut the shaft 1-2mm past the grove the retaining clip sets in. This is easiest done with a cutoff wheel on a Dremel but can be done with a hacksaw also. Make sure to clean the magnets off and blow the can out of any shavings before you put it back together.
if there not sealed bearings in this motor why not pack them in white lithium just like packing a wheel bearing on your car.. i even took apart my skate boards sealed bearings and packed them with vaseiline and they would spin for ever or go to the heli page and get some ceramic bearing for the blade holder on a HK450GT they should fit i think... then you get the best money can buy for little moneys and that should work.. now hk needs to send me money for showing them how to improve there products and for making millions on my suggestion( like that will ever happen )
buy the scorpion bearing oil on this site $4.99 I believe it comes with a needle applicator. It's the best thing you can do for your motors and will at the least double the life of the bearings
Greasing the bearings will decrease the RPM limit of the motor. Oil is always better for high RPM's. And as for using the HK450GT blade holder has a 4mm feathering shaft. They are the wrong size. This motor has a 3x7x3 botton and a 3x8x4 on the top
they might yes might get to it in a couple 3 years you know how fast hk moves ( they could'nt win a snail race with a head start they move so slow )
Customer Reviews
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wkruger
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Finally this motor is available in the US warehouse!
Been using these on my f550 clone hexacopter with great success. Had a bearing start to go in one of my motors so i'm replacing it with a new one. Still trying to figure out the best prop combination for these motors though. I have the photoship one arm extenders and am running 12 x 4.5 props with pretty good results. Only 3 flights into it and have lots of tuning ahead of me.
Any maintenance that you guys suggest for these motors? I'm starting to get bearing noise in another motor - can I oil somewhere with triflow oil?
Thanks HK!
Will
To use on my quad frame I have to get rid of the long shaft. Problem is the "c" clip comes off easily but the grab screw is so tight, or glued in place that I've stripped the head without removing the screw. It seems the motor cannot be opened up. I don't know what I'll do when it's time to replace a bearing. Now I'll have to buy another style of prop mount and flip the motor around. I haven't tested the motor in flight because I'm waiting for HK to send me missing parts from my X525 frame.
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3/20/2013 Tracy
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I have been using these on several quads. They fly very well and smooth. However I have to keep replacing motors because the bearings are failing. Have had 10 motors fail within the last month, all with bearing issues. I have now gone to another motor.
I got 4 of these motors from a buddy of mine who had crashed his octocopter and I replaced the shafts since then I've replaced one with a new one and just had another fail. I don't think it's the motor itself I think it's the fact that these 4 I had were involved in a crash. When they're running they are exceptional but I will put to caveat that they run best on a 4S. I tried running on the 3S and it takes 60pcnt throttle to get off the ground with a 4S 40pcnt throttle and they fly great.
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