Bosch 35w motors

[craig_colliass]

I have a couple of the Bosch 35w motors, and am wondering how people Connect wheels to them the ones I have, have got a square hole about 5-6mm through the output shaft.
Any ideas how best to sort out the wheel connection.

[psycho_fling]

i used a 4mm allen key (steel) which i think fits in nicely from memory might need slight adjustment but worked well

[craig_colliass]

I think the hole for the gearbox is about 4mm square section.I was wondering if you just got key steelthat size and welded a bit on to a round shaft to fit the wheel?

[typhoon_driver]

you are looking for some 4mm keystock (sits in a keyway on a motor shaft). Alternatively just take your shaft, make it a bit longer and find a friend with a mill to mill a square section on the end.

[typhoon_driver]

actually you could do it with a file and a bit of patience

[botmad]

Craig i use some 4mm key way steel and a bolt the size of thge wheel hub .... then pre drill the centre of the bolt with a 5.5mm hole 10mm deep fit the key steel into the hole then weld it in ........

pete

[Mouldy]

A bearing supports the wheel between the motor and wheel- idealy it should be supported both sides.

I originaly had titanium axles, i had to upgrade those to P20 tool steel as they sheered.

[craig_colliass]

Hi did you boar out the centre of the output shaft or did you use the original 5mm square?
and How did you stop the wheel from coming off?

[Mouldy]

The shaft is turned and has a 4mm square milled on the end, directly next to the motor on the shaft a pulley slides over and is held in place with a grubscrew (there's a flat milled onto the shaft for this, the pulley powers my front wheels) then it passes through the armor and sits in a bearing. The wheel then slides over the end of the shaft and is held in place with a keyway.

I'd strongly suggest putting a bearing as close to the motor as possible and on the other end of the loading point (in this case a wheel)

It's shown quite well here;
http://www.teamstorm.com/feathers/forcex.htm
Scroll down

[craig_colliass]

I put 5mm I meant 4mm square. that about clears that one up many thanks

Craig