Getting the gearing and mounting right?

[serg10]

Hey there, about to make my first build and I wanted to get some input on these parts before I order:
A 6R25M054090 5 mm (HTD) Pitch, 54 Teeth, 9mm wide Single Sided Neoprene Belt with Fiberglass Cords
A 6L25-040SF0910 5 mm (HTD) Pitch,40 Teeth, 0.313" Bore, No Insert, Polycarbonate Timing Pulley for .354( 9mm )" Wide Belt
A 6A25M014DF0906 5 mm (HTD) Pitch,14 Teeth, 6mm Bore, 2 Flanges/With Hub, Aluminum Alloy Timing Pulley for 9mm Wide Belt

Will this work with a Turnigy 260KV SK3 Motor with 8mm shaft? I know I'll have to bore the pulley hole from 6mm to 8mm and probably flatten out a part of the motor shaft but I'm a bit confused as to how to tighten the pulley on to the motor shaft? Does it have a grub screw on it?

For the mount, can I use a Bridgeport CNC to make the mount? I have never machined anything before, is it easy enough that with a few YouTube videos a noob can do it?

Thanks, and I promise to post pics along the way

 

[torqueboards]

Looks good! If you read the post in my signature it has part numbers as well for a similar build.

You should be able to use the Bridgeport CNC to create a mount. Might be a bit easier if you had some help on building it but I'm sure you could figure it out as well. Might be tough but it's doable

 

[bandaro]

For the mount, can I use a Bridgeport CNC to make the mount? I have never machined anything before, is it easy enough that with a few YouTube videos a noob can do it?

Sure can, depending on the model... It's very straightforward to cnc machine stuff if you know where to find the functions in the program. The videos will show you, just take everything nice and slow with aluminium and use the biggest bit you can. I use a 6mm cutter at around 500mm/min for aluminium, about 2mm deep each pass. Some helpful hints though: make sure you bolt the material down well, use some fluid, and cut a test out of timber or plastic first. Just grab some MDF/timber block/foam the same dimensions and run the file you made for the final part through first, to make sure you have it right without risk of wasting your more expensive aluminium block or breaking the bit if it's your first CNC program.

 

[serg10]

Looks good! If you read the post in my signature it has part numbers as well for a similar build.

You should be able to use the Bridgeport CNC to create a mount. Might be a bit easier if you had some help on building it but I'm sure you could figure it out as well. Might be tough but it's doable

I actually got these numbers from your guide - thank you for that by the way!


Sure can, depending on the model... It's very straightforward to cnc machine stuff if you know where to find the functions in the program. The videos will show you, just take everything nice and slow with aluminium and use the biggest bit you can. I use a 6mm cutter at around 500mm/min for aluminium, about 2mm deep each pass. Some helpful hints though: make sure you bolt the material down well, use some fluid, and cut a test out of timber or plastic first. Just grab some MDF/timber block/foam the same dimensions and run the file you made for the final part through first, to make sure you have it right without risk of wasting your more expensive aluminium block or breaking the bit if it's your first CNC program.

Good idea to use another test material like wood before trying it with aluminum. I will definitely do that. I should also mention, its not a computer controlled CNC but a manual one like this: http://www.lislesurplus.com/misc/32-cnc-vertical-mill-bridgeport-proto-trak/32-cnc-vertical-mill-bridgeport-proto-trak-1.jpg