RC-Monster Forums - View Single Post

Shark413 · 02:42 PM

Started the build, I put some M3 screws in the motor to see how it would fit. It seems ok, but I think I prefer the larger screws. In the first picture you can see the M3 screw sits way down in the hole, a larger screw would use all the surface area to spread out the torque, the M3 looks like it is using only half. Also a larger screw would have more surface area (threads) to engage the endbell, which will mean a stronger bond between motor and mount. You can also see in the picture how close the stock hole in the MMM motor comes to the endbell screw. I think an M4 screw will still be ok, need to pop the endbell and take a look. In the next picture (side view) you can see there is plenty of shaft (at least with the MMM 2650kv motor) for the pinion. I wish Losi would make some adapters that allowed you to use m3 screws (in case you didn't want to use the Losi motor). I was thinking of taking some 8-32 screws, cutting off the shaft, drill out the center and use a m3 bevel drill to make my own adapter, but it might be easier just to tap the motor endbell. You definetly need to grind the rear motor support when using the MMM motor.

M3 screw

Plenty of shaft

MMM 2650kv motor is much smaller than the 2200kv motor

Probably going to need to run a smaller pinion with a 45T spur.

	(#5)
Shark413 RC-Monster Carbon Fiber Offline Posts: 468 Join Date: Nov 2006 Location: Los Angeles, CA	01.28.2009, 09:14 PM Started the build, I put some M3 screws in the motor to see how it would fit. It seems ok, but I think I prefer the larger screws. In the first picture you can see the M3 screw sits way down in the hole, a larger screw would use all the surface area to spread out the torque, the M3 looks like it is using only half. Also a larger screw would have more surface area (threads) to engage the endbell, which will mean a stronger bond between motor and mount. You can also see in the picture how close the stock hole in the MMM motor comes to the endbell screw. I think an M4 screw will still be ok, need to pop the endbell and take a look. In the next picture (side view) you can see there is plenty of shaft (at least with the MMM 2650kv motor) for the pinion. I wish Losi would make some adapters that allowed you to use m3 screws (in case you didn't want to use the Losi motor). I was thinking of taking some 8-32 screws, cutting off the shaft, drill out the center and use a m3 bevel drill to make my own adapter, but it might be easier just to tap the motor endbell. You definetly need to grind the rear motor support when using the MMM motor. M3 screw Plenty of shaft MMM 2650kv motor is much smaller than the 2200kv motor Probably going to need to run a smaller pinion with a 45T spur. Losi 2.0 8ight-E / Losi 2.0 8ight-E/T / jammin SCTRC10 / Slash 4x4 PE Last edited by Shark413; 01.29.2009 at 02:42 PM.