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'roboRon · 06-26-2007, 04:32 AM

Has anyone stripped down a kontronik kora motor? I was finishing up a pinion change on mine it it has become extremely notchy. I think it has ingested a stray metal filing. I have been able to remove the main drive shaft by loosening the top and bottom grub screws on the motor, but i cannot get the can away from the windings? Anyone know the trick, or do i need a new motor?

'roboRon · 06-26-2007, 05:42 AM

Ok, i have worked it out. Remove the pinion off the shaft, and the upper grub screw opposite the motor leads. Gently tap the top of the 5mm shaft and the bottom red section will split from the grey can. Remove the screw that holds the windings and top case together. Secure the grey can in a vice gently, and tap the red section near the small bearing until they come apart. You should now be able to pull the winding out from the permanent magnets with a small amount of effort.

I was attaching a new pinion, and my helikraft hex driver snapped, i found two very small segments on the permanent magnet. On reassambly it now appears fine, though i damaged a bearing trying to find out the way to get it apart. Hopefully it will live another day

prototype3a · 02-28-2010, 06:42 PM

I found a fairly easy method of opening these motors up tonight with the insights from your post. I couldn't figure out how to get the bearings out but they seemed to be in good condition. I didn't find any stray metal inside but I did find a couple very small pieces of grass.

What I did was loosen both the top and bottom shaft setscrews. push the shaft into the motor till the top of the shaft is flush with the collar. Secure the setscrew in the collar and leave your driver in the setscrew. Now holding the motor can you should be able to push the windings out of the can using the inch or so portion of the motor shaft that is sticking out from the bottom.

I'm tempted to try this on some other rather large outrunners I have to see how their construction compares to the Kora.

06-26-2007, 04:32 AM	#1 (permalink)
'roboRon Join Date: May 2006	[solved]Kora disassembly? Has anyone stripped down a kontronik kora motor? I was finishing up a pinion change on mine it it has become extremely notchy. I think it has ingested a stray metal filing. I have been able to remove the main drive shaft by loosening the top and bottom grub screws on the motor, but i cannot get the can away from the windings? Anyone know the trick, or do i need a new motor?

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06-26-2007, 05:42 AM	#2 (permalink)
'roboRon Thread Starter Join Date: May 2006	Ok, i have worked it out. Remove the pinion off the shaft, and the upper grub screw opposite the motor leads. Gently tap the top of the 5mm shaft and the bottom red section will split from the grey can. Remove the screw that holds the windings and top case together. Secure the grey can in a vice gently, and tap the red section near the small bearing until they come apart. You should now be able to pull the winding out from the permanent magnets with a small amount of effort. I was attaching a new pinion, and my helikraft hex driver snapped, i found two very small segments on the permanent magnet. On reassambly it now appears fine, though i damaged a bearing trying to find out the way to get it apart. Hopefully it will live another day

02-28-2010, 06:42 PM	#3 (permalink)
prototype3a Registered Users My HF Map location Join Date: Jun 2006 Location: Chrisitansburg VA USA	I found a fairly easy method of opening these motors up tonight with the insights from your post. I couldn't figure out how to get the bearings out but they seemed to be in good condition. I didn't find any stray metal inside but I did find a couple very small pieces of grass. What I did was loosen both the top and bottom shaft setscrews. push the shaft into the motor till the top of the shaft is flush with the collar. Secure the setscrew in the collar and leave your driver in the setscrew. Now holding the motor can you should be able to push the windings out of the can using the inch or so portion of the motor shaft that is sticking out from the bottom. I'm tempted to try this on some other rather large outrunners I have to see how their construction compares to the Kora.

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