开云体育

On Tue, Jun 28, 2022 at 09:09 AM, OldToolmaker wrote:

... used for the first time one of my Unimats with the 24 volt motor conversion.

My new motor finally showed up.
Contrary to what I expected, the ~ US$22.00 paid for shipping had it shipped on 23/06 and arrive on 14/07, just three weeks which is quite reasonable.
It must weigh over 500 grs. and shipping it over 20.000 km is not cheap these days.
The time from its arrival and it getting home to me (04/08) was customs/PO delays ...? 8^°

Here it is:





Specs:
Length: 80.5 mm / 92.5
Diameter: 52.0 mm
Shaft length / diameter: ? 20.5 mm / 8.0 mm?

The two pairs of M3 mounting holes are 35.0 mm apart and at right angles to each other.

... to make a new motor pulley and to drill and tap a set screw ...

I ordered a ER11A spindle for the shaft but made a mistake with the size, ordering the ER11-3 instead of the ER11-8.
So now I have to see how to turn a 3.0 mm shaft hole into an 8.0 mm shaft hole.
Material seems to be hard, so it won't be too easy.

Another issue I have is the existing pulley: it has no set screws and the motor's spindle has no flat ground into it.

I'd appreciate some indication of a proper solution on how to solve this for the time being.

I want to keep the original pulley so it will be (to start off) on duty at Unimat the I have refurbished.
I would eventually make another pulley to use with this new motor and if the U3 motor proves to be too weak for the milling table, I'll just get another one of these and sell the original U3 motor.

Thanks in advance.

Best,

JHM