RC-Monster Forums - information on kb45 motors?

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- - information on kb45 motors? (https://www.rc-monster.com/forum/showthread.php?t=20248)

Quote:

Originally Posted by scarletboa (Post 280283)

so, if the l-can motors are more powerful than the fiegaos, my 8xl 1600kv on 6s lipo is going to be complete overkill in a savage x 4.6. :yipi:

maybe, i'll buy the 1400kv L-length motor if the xl destroys my drivetrain.

Dan@kershawdesigns told me that the KB45-8xl motor is about %40 more powerful than the cc/neu motors. if the flux can do standing backflips, what will i be able to do?:intello:

i'm going to lock my tranny into 1st gear by tightening the set screw in the tranny all the way. i ordered 5000mah 25c zippy 3s lipos and i'm hoping they are enough to power the motor. i will run 18/47, so i think it will be geared a little low and it shouldn't draw too many amps. if i want more speed, i could always use a bigger pinion.

also, i don't have to worry about qc issues as i bought my motor used. the shaft is already ground down to 5mm and i have a custom motor mount on the way from Dan so all i need now to mount it is the 4mm screws. any suggestions? hobbycity has them, but i'm not taking any chances. the one person who reviewed them said the heads break off easily.:whip:

Dan @ kershaw says a lot of things, which ones are true is another question.

Quote:

Originally Posted by scarletboa (Post 280470)

wouldn't tightening the set screw all the way be sufficient for locking it in first?

You are not eliminating the function of the one way bearing that 1st gear rides on. Adjusting the set screw adjustment for second gear will only prevent it from shifting into 2nd gear. You need to have the 1st gear spur physically attached to the center shaft to lock the tranny. This will allow motor brakes and reverse.

To physically see this at work hold the spur gear with you had and try to roll the truck forwards, it should not move. Now try to roll it backwards, the one way bearing will allow it to roll backwards by releasing the 1st gear spur from the center shaft.

hpi p/n 100905 is the best and cheapest way to lock a savage into 1st. You will have to fool with the 2nd gear spur if you want it locked into 2nd though, no drop in parts for that yet... I bet that we could nig something up though...

Keep in mind when using that part the drive gears will wear out every 25-30 packs. Also it's not the easiest part to locate at the moment

Quote:

Originally Posted by fastbaja5b (Post 280783)

Keep in mind when using that part the drive gears will wear out every 25-30 packs. Also it's not the easiest part to locate at the moment

The full steel tranny wears out quickly? Sounds like some of that oil modifier would be good for that tranny. I may have to try that.

is there any way to prevent it from shifting into 2nd gear while at the same time, getting rid of the owb? or at least locking the owb?

Already been explained in post #17- you need to buy some parts, or bolt the gear to the hub, a la revo 2nd gear mod I imagine...

Will a KB45L 2300KV motor overheat on 4S lipo in a 4.3Kg e-savage? Assume that it is geared for slightly over 40mph (around 25T)

I have one new kb45 motor but I am not sure if I should just get a HW150A for use with it or should I get a MMM/CC Neu combo.

Quote:

Originally Posted by littlegiant (Post 281209)

It should be alright, but watch temps closely. I'd get the MMM to run the kb, and upgrade to a cc neu if the kb fails.

Some pictures of my KB45 L can 2300KV

The rotor looks pretty well made.

The shaft has been ground down to 5mm.

Quote:

Originally Posted by littlegiant (Post 287616)

Some pictures of my KB45 L can 2300KV

The rotor looks pretty well made.

The shaft has been ground down to 5mm.

how did you grind down the shaft?

Quote:

Originally Posted by scarletboa (Post 287625)

how did you grind down the shaft?

Ran the motor while filing it.

Quote:

Originally Posted by littlegiant (Post 287632)

Ran the motor while filing it.

did you grind a flat spot on the shaft?

Quote:

Originally Posted by scarletboa (Post 287634)

did you grind a flat spot on the shaft?

Not yet.

Quote:

Originally Posted by littlegiant (Post 287616)

Some pictures of my KB45 L can 2300KV

The rotor looks pretty well made.

The shaft has been ground down to 5mm.

Did you simply unscrew the front endbell?

How tough was that?

you just put 2 screw through it and use a channel lock to turn it....

I have to say, the best Cheap motor would be the KB45XL motors... I really did enjoy bashing those motors.. And they are POWERFUL.. efficient..?. that's another thing...

I think Maytech makes the KB line of motors... From my testing, they seem to like 25K rpms...