Gear ratio of CIM-U-LATOR for banebot-775

[swapnil94]

Can anyone tell me the gear ratio for CIM-LATOR banebot-775?


^^ this gearbox

As said on the banebots website, it's a 2:7:1 reduction.

[swapnil94]

it says

Reduction : 2.7:1

is 2.7:1 same thing as 2:7:1?

[kevin.li.rit]

Originally Posted by swapnil94

it says


is 2.7:1 same thing as 2:7:1?

Yes. it is 2.7:1 he made a typo. And you can always count the number of teeth on each gear. 27 tooth and 10 tooth.

Originally Posted by swapnil94

it says


is 2.7:1 same thing as 2:7:1?

Originally Posted by Coffeeism

Yes. it is 2.7:1 he made a typo. And you can always count the number of teeth on each gear. 27 tooth and 10 tooth.

Yeah, typo. It's 2.7:1. For a single stage gearbox, it's hard to get 2:7:1.

[swapnil94]

Ohh

so 19500 rpm would be geared down to 7800 rpm. right?
just making sure
thanks

[kevin.li.rit]

Yes.

[kevin.li.rit]

Originally Posted by swapnil94

Ohh

so 19500 rpm would be geared down to 7800 rpm. right?
just making sure
thanks

Oh and FYI, I'm pretty sure that the motor you are using is the RS775-18... If so then it only spins at 13000 RPM at 12 volts giving it about 4800 rpm out of the CIMulator.

[Ether]

Originally Posted by swapnil94

Ohh

so 19500 rpm would be geared down to 7800 rpm. right?
just making sure
thanks

Three problems:

1) The free speed of the RS550-12 is 19300. That's not the motor you are planning to use is it?

2) 19500/2.7 = 7222, not 7800.

3) RS775-18 free speed is 13,000 not 19500 13,000/2.7 = 4815