Waldown Super Sensitive High Speed Drilling Machine.

**Techo1** · 24th February 2015, 10:14 PM

This little machine now resides in my shed after spending many years neglected down the back of a factory in Somerton. It should clean up nicely and it is all there except for the pulleys for the lower speed range and the JT0 chuck. I have an old 1/2hp Lenze VFD that may allow me to run it at lower speeds but I won't know until I complete a Delta conversion of the 1/2hp 3phase motor.

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**RayG** · 24th February 2015, 10:48 PM

Hi Techo,

Congratulations on the purchase, looks like you got a good one, in near perfect condition.

With the VFD, you might not need the low speed pulley set, although the torque will be lower, the drill sizes are going to be smallish anyway, so a bit less torque might not matter so much.

Ray

**Anorak Bob** · 24th February 2015, 11:10 PM

You lucky ba...........

It is always a great thing to see a neglected or not so neglected machine end up in appreciative hands.

Enjoy it.

Bob.

**Old-Biker-UK** · 25th February 2015, 05:26 AM

Great find - they are little treasures.
Had my y-fronts in a twist wondering how I missed it till I realised it was the Somerton in Oz not the one just up the road from me here in the UK.

Mark

**eskimo** · 25th February 2015, 07:45 AM

Yep, great find Techo

wish you lot could find the spare parts I need for mine

**johntopp** · 25th February 2015, 06:02 PM

I've got one, it's older, but the motor speed should be the same (2850)

It's fitted with the 3000/6000 pulley set

I'm happy to measure them up if you need the dimensions

**Techo1** · 26th February 2015, 02:00 PM

Thanks for the offer John, I would like to have that information available if the VFD conversion does not prove to be effective. Does yours have the 4 step pulleys that will go from 3 to 12000 RPM? All I need really is the outside diameter of each step on the pulley to save me having to calculate.

Here is the machine running at 18000RPM on 415 volt 3 phase.

https://www.youtube.com/watch?featur...&v=vlYob_DOoSo

Lex.

**johntopp** · 6th March 2015, 04:50 PM

The two step spindle pulley is 1.50 and 2.75 inches, motor pulley is 3.25 inches (nominal sizes ?).

Spindle pulley is "fixed", the motor pulley has a knurled retaining nut, speed change is just a matter of flipping the motor pulley over so it aligns with either top or bottom splindle pulley.

All pulleys are crowned, just look like a simple straight taper from the edges to the centre, edge diameters being about 50 thou smaller.

Pulley width is about 0.82 inches, flat fabric belt looks to be 3/4" nominal.

These measurements seem to yield 3368 and 6175 rpm with a 2850 rpm motor, with a bit of slip I guess this is near enough to 3000/6000 rpm

**Techo1** · 26th March 2015, 09:33 PM

Thanks for that information John, yours must be a different model as mine requires 4 step pulleys to achieve the lower speeds.

Today I pulled the motor apart and located the star point.

Star point 1.jpg Star point 2.jpg

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Waldown Super Sensitive High Speed Drilling Machine.

if you need the diminsions for the low speed pulleys, I can help

Low speed pulley dimensions

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