Wtf? How to open a Hacker motor?

Right now I'm having a C50 Maxx 14.4V Hacker motor in my hands, but it feels like it is glued together First I took out the 5 screws on the front of the motor, but the front didn't want to go off. So I tried the back 5 screws, and also the back doesn't want to come of Any suggestions how to do this? (I don't want to ruin the beautifull purple can, it's like new )



And another question about this motor; is it normal that it turns VERY easy?

[suicideneil]

Slottless stator, it will spin alot smoother than a slotted stator motor (neu, medusa).

Remove the screws from just the rear end, then tap the shaft against a hard surface, and the rear endbell will pop right off. By tap, I mean quite hard/firm- you may use a hammer to make life easier, just hold the motor firmly in your hand and hit the end of the shaft.

Originally Posted by suicideneil

Slottless stator, it will spin alot smoother than a slotted stator motor (neu, medusa).

Remove the screws from just the rear end, then tap the shaft against a hard surface, and the rear endbell will pop right off. By tap, I mean quite hard/firm- you may use a hammer to make life easier, just hold the motor firmly in your hand and hit the end of the shaft.

Ah, thank you! It went pretty easy, but first I was scared I would damage something so I didn't do that. The rotor is very small, I thought it was larger, but the motor looks good!

What's the difference between a slottless stator and a slotted stator? (Sorry, I'm a bit of a brushless noob...)

Thank you for your help!

[suicideneil]

Slottless:






You can see that the windings are essentially 'stuffed' inside the stator, and are smooth inside, forming a nice hollow tube for the rotor to sit inside.

Slotted:





Basically, the slots on the stator focus the magnetic field, causing the rotor to align to the field as it rotates - thats the notchy feeling you notice as you spin it by hand. Depending on the specifc design and brand, the notchy feeling can be greater or less pronounced.

With slottless motors, the field isnt focussed in the same way, so you dont feel the notchyness as it spins. As a side note, slotless motors are usually 2 pole so they spool up faster, but produce less torque compared to a 4 pole slotted stator motor (that spools up slower, and has a higher natural drag-brake effect).*

*correct as required..

Wow, awesome! Thank you for your explanation! Still got 2 questions:
- So my Hacker is probably a 2 pole?
- What do you mean by "spool up faster"? Could you explain this? (Sorry, my English isn't very good)

[suicideneil]

Yep, Hacker is 2 pole.
Spooling up is basically how quickly the motor reacts to the throttle signal- a 2 pole motor will hit maximum rpms very quickly, where as a 4 pole/ 6 pole etc will take a little longer to max out, even when you pull full throttle on the transmitter instantly. Kind of like car engines- smaller engine will accelerate quicker but have limited power/ top speed, but a larger engine will take longer, yet have much more power to make a higher top speed (through gearing).

Originally Posted by suicideneil

Yep, Hacker is 2 pole.
Spooling up is basically how quickly the motor reacts to the throttle signal- a 2 pole motor will hit maximum rpms very quickly, where as a 4 pole/ 6 pole etc will take a little longer to max out, even when you pull full throttle on the transmitter instantly. Kind of like car engines- smaller engine will accelerate quicker but have limited power/ top speed, but a larger engine will take longer, yet have much more power to make a higher top speed (through gearing).

Oh, now I get it! Awesome, I really appreciate your help!