360 - mini hypnodisc

[mattsdragons]

Think those motors above could still be mated to the same Ryobi gearboxes?

[Mouldy]

Why would i want to do that?

[PJ-27]

Anyone got a good source for 5mm ID pinion gears? I know Chris mentioned he got his from Gimson but it doesn't seem he does them anymore.

[maddox10]

Drilling out a standard batterydrill pinion ain't an easy job. Pure hardmetal cutters are the least you need, and then the chances of succes are limited. The aussie forum has quite a few threads on that.

I myself prefer to make gearboxes with standard, affordable mod 1 gears.
The pinion I prefer is the steel Z12 Mod 1. You can buy those easy enough over the net.

[overkill]

I use a straight flute solid carbide drill for enlarging pinion bores and it works extremely well. I can find some links if anyone wants to try them.

[maddox10]

Nick, PM me those links, thank You.

[PJ-27]

I can see holding the gear being the biggest issue.

[overkill]

I can see holding the gear being the biggest issue.

Here is how you drill out the gears:



I use an ER-32 collet chuck to hold the gears in my Seig lathe. The carbide drill cuts thru them like butter and I just used a little WD-40 as lube & coolant.

[Liftoff]

I don't think its possible to drill them unless its clamped in a vice on a proper pillar drill or a lathe...with lots of coolant.
The material is probably cast, its very hard and gets hot quickly. I cracked two pinions while drilling them on a lathe with a Co twist drill. Used a spade drill and reamer for the third gear...it worked

[Mouldy]

I plan on just re using my banebots gears...

The easiest way to get the gears would be to buy some gear stock the right size, part off a load of them, get em hardened and sell them.