Brushless Motor and Gearing FAQ
Mofo Rc Brushless motors are custom spec built for performance, Smooth crawling, Massive Torque, High Speed. We have all the different options you could ever need.
Our motors are sold in a few pre made combinations with the gear and the mount
Build your own Brushless motor combo, If you know what you need, Or have a certain motor in mind and a certain gear you need on that motor you can add the motor you need to cart, Then add the Pinion gear you need, And if you need a mount you can add that as well. IF YOU ORDER like this please also add the item in the store called Labor Pinion gear install. This will tell us that the gear you ordered will need to be installed on that motor and we will install it for you. If you are ordering more that one pinion or more than one motor in that same order please them separately, Otherwise we wont know which gear goes on which motor. We will add the orders to each other and send them packaged together - refund the shipping on the extra orders.
We have Several Brushless Motors to choose from, Some of the Main differences are as follows. Mounting pattern, 9mm or 12mm, The size in Millimeters of the bolt spacing across center to center. The mounts we offer are also measured the same way. Make sure you order the correct mount for the motor you order.
For Scx24 / Ax24 Specific mounting
Forward facing 9mm mount, Scx24 / Ax24 This will put the motor facing the front of the rig, Alternatively you can in many cases flip the skid plate the opposite direction and make it a rear facing motor, The driveshaft lengths will change if doing this as the trans output shaft is longer in one direction vs the other.
LCG 9mm Mount, Scx24 / Ax24 This will put the motor facing the rear and to the side of the transmission close to the stock location. This mount uses a Transfer Gear that is included with the mount, This gear is larger than the motor pinion and smaller than the spur gear, It goes inbetween the Pinion and Spur to transfer the power from the motor to the transmission. It is installed via a screw that goes throught the outer mount cover and into the center of the gear then through the rear of the mount and into one of the motor mounting screw holes. Use a tiny bit of loctite on the hole in the motor it goes into and do not overtighten overtighten the screw. Does not need to tighten up. Just install it and let the loctite dry.
Forward Facing 12mm Mount, Scx24 / Ax24 This will put the motor facing the front of the rig, Alternatively you can in many cases flip the skid plate the opposite direction and make it a rear facing motor, The driveshaft lengths will change if doing this as the trans output shaft is longer in one direction vs the other.
12mm Side mount / Big Block Mount, This sits the motor to the side of the transmission and will work with our NanoBam XL motor. However you will need a large pinion gear appx 28T mod.3 or 16T mod.5
Direct Fit Models not needing Mounts Trx4m, Redcat Ascent 18, FMS models and others
Many models not needing a mount will usually be 12mm Mounting pattern, Some of the larger motors in diameter such as the SMP, ROP, MVP May not fit these directly as for size constraints or clearances. Others with the proper gear for your model will fit perfectly or may a tiny bit of filing on the trans case for the FMS models so the motor doesnt touch the trans while rotating.
Gearing options In the motor description will mention the shaft size, Or shaft diameter, this is the protruding shaft that the pinion gear installs on. Most of the motors we have are either 1.5mm 2.0mm or 3.0mm and are round in shape or may have a cutout if stated in description. These will accept our gears listed as that same diameter shaft size. They are press on gears and once installed are very hard to take off unless you have a pinion gear removal tool. Also recommended if you plan to install the gear yourself. Match up your pinion gear shaft diameter to the motor shaft diameter to get the correct fit. The gear teeth count is listed as well. The less teeth count the smaller diameter the gear and lower your overall gear ratio and speed. The larger number of teeth will increase the gear ratio and speed. The gear pitch is listed as well, The smaller the pitch the more teeth you will need to be the same size outer diameter as a larger pitch, Example Mod.3 11T is appx 3.85mm, Mod.4 9T is appx 3.95mm and mod.5 7T is appx 4.4mm
Mod.3 - This is the stock pitch on an Scx24 and Ax24 It is the smallest gear teeth size and has the best resolution and least slop. We do offer a steel Mod.3 spur gear on the site.
Mod.4 - This is the stock pitch on the Trx4m Mod.4 11T, Redcat Ascent 18 Mod.4 12T, And many FMS Models use Mod.4 16T, Mod.4 gear teeth are slightly larger than Mod.3 and therefore are stronger teeth with only minimum loss of low speed resolution and slop. We do have a mod.4 steel Spur gear on our site you can use to convert an scx24 / ax24 to use mod.4 and get the benefits of stronger driveline.
Mod.5 - This is an optional pitch for the scx24 / ax24 and may be used on some other rigs. This pitch has the largest teeth size and is therfore the strongest at the cost of possibly less low speed resolution and drivetrain slop. If you have serious power you may need mod.5 we offer a mod.5 steel spur gear on the site as well.