1st bot

**typhoon_driver** · 20th April 2005, 18:50

well ive got the same problem mark

Thing is is that the cogs im using from technobots just happen to have a hole of 5mm through the centre and the shaft, once filed down, on my motors looks as if it is roughly 5mm.

You could always attempt to smooth the thread to a smooth finish by putting an apoxy resin on it and then carefully smoothing it out. This should be strong enough as we used it in the hubs of the wheels for the lightweight robots, thunder and lightning.

20th April 2005, 19:04

Well i want to mount the wheels straight onto the right angle gear box shaft of the windscreen wiper motor. But the shaft is threaded and stubby. I was thinking maybe get a threaded tube then put a pin through that and the shaft or weld it. Im not too sure really. Ill have a mess about and see what i can come up with. Im sure somebody has succesfully done this before.

**typhoon_driver** · 21st April 2005, 07:40

you could try and replace the shaft of the gearbox. I thought you were talking about the shft of the motor. Replacing the gearbox shaft is alot easier than trying to replace the motor shaft. This is probably easier than attempting to weld or pin a stubby shaft.

**maddox** · 21st April 2005, 09:04

I replaced the motorshaft of the wipermotor I used on Project I and IIs steering, as the plastic gear came lose time and time again.
Oh well, I can do things like that fairly easy now.

**maddox** · 21st April 2005, 15:29

Do you have a lathe and mill?
You remove the original steel axle out of the plastic wormgear. Then you turn out the ragged hole to the dimension of the new axle. But be sure its in the centre of the gear.
The new axle has a large flat head, so you can bolt the gear onto that head.

If this to difficult, mail me and we will see how we can do that easier.