electric motor shaft extension.

[th62]

I removed this motor from a pressure cleaner, it’s supposed output is 1.9 kw, looks a bit small for that sort of output though, but it’s just too good to throw away.
I can cut a slot in the housing to run a V belt through but the shaft is too short to attach a pulley - roughly level with the top of the bearing, the bearing housing is recessed so slightly lower than windings. Making a new end plate/bearing housing won’t help so any ideas on how to extend the shaft an inch or so.

[jhovel]

Joining a short shaft with a slot in the end and a bolt through the centre to pull it tight to the motor would work. To apply any radial forces (like a pulley) would take an additional bearing mounted outboard but easily located in this case in the bore of the pump housing by the looks of it - maybe there is a lid/cover that fitted into the bore you could use to house a bearing?
Alternatively, you could consider a double row bearing to replace the single row one there and let it stick out of the bore but contain the joint of the shaft parts.... would be my second or last choice though.

[simonl]

Looks like a similar setup to a Gerni (brand) pressure washer I had. The earlier Gerni washers were very well made and had good quality bearings/motors. If that cast aluminium shroud (where the pump was housed) is not needed, the option to Joe's suggestion is to cut or mill off that shroud to expose the shaft.

Edit: on second inspection of the pics, you may be able to disassemble the front section and then make modifications? Failing this I would go with Joe's suggestion. Maybe make a flange or cover plate at the front opening that bolts to the end and retains the extra supporting bearing required (if attaching a pulley).


Simon

[th62]

Yes it's an all alloy motor and extremely well made, hence my reluctance to throw it away. Jhovel's idea seems like the go I think; although, I did have an epiphany last bight, which I shall explore today, time permitting:
The other end has a fan on it so I may be able to reverse the rotor. With a bit of luck the protruding shaft might be long enough to mount a pulley. I'll still have to manufacture an end plate with a bearing housing though which I was hoping to avoid. Lots of mights and ifs though.