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pics for racingtadpole.

I have one each for my Hercus 3 jaw and 4 jaw chucks. Similar design to the ones in Bob's post. Wedges are easier to make than a curved cradle, as you can just move the wedges until you get the chuck...

Would it improve the legibility of the numbers if you took a skim cut on the lathe? Better still, how about white or silver plastic, then fill the numbers with black paint, then skim on the lathe?

I don’t sorry. But I’m keen to hear what caused the paint blisters, as I have the metric equivalent of that DTI and would like to avoid similar damage.

True, but I was referring to the home made version the other guys were suggesting. Poor wording on my part.

Your PD is almost identical to mine John. I got rid of the intermediate pulley. Did you?

You could just put the single phase motor to use in something else. Maybe fit a polishing mop or wire wheel to it?

We don't know what diameter hole the OP wants to bore. It may be too small for a boring bar with and inserted cutting tool. I assume that's why he wants to grind it from a single piece of HSS.

Here's a commercial solid carbide boring tool to give you an idea of geometry.

In that case it doesn't have to be HSS. I made a boring tool from O1 steel. You can turn down the shank, leaving a larger radius piece on the cutting end. Grind away most of the waste at the tip to...

I like it too. I reckon it's a great no-fuss paint for machines.

That would certainly do it!

True, but I can't think what else would cause the motor to get that hot. If no centrifugal switch and the capactor is new, perhaps it is wired correctly as you suggest.

P=V^2/R, so if you double the voltage the power increases by a factor of four.

As AJ alluded to, the motor may have a centrifugal switch to engage a start winding. If that switch fails in the closed position the start winding will overheat very quickly. That would be worth...

If I had a pair of 85 year old genuine Klaxon brand horns, there’s no way I would risk damaging them by applying double their rated voltage. Doubling the voltage means they are consuming four times...

Is 2K more resistant to red hot swarf than single pack enamel? If not, I'd say it provides no real benefits and plenty of drawbacks.

I agree with Reidy41 that a quality 2K finish may actually look...

Thanks Brett. I've got some brass and copper shim. I'll have a crack at it.

I'd never considered shimming the rack to remove the hand-wheel backlash. That's a good idea. I might do mine. What did you shim it with?

John,
a 240V kettle element should be around 20-30 ohms.

That looks better John. Good luck with the thyristor.

Looking at your circuit John, I can't help thinking the capacitor will not charge, since both ends of the cap will be at the same potential when the motor is running.

Perhaps a high helix lead screw? https://www.abssac.co.uk/p/Lead+Screws/High+Helix+Lead+Screws/70/

Well done. Did you run into the duty cycle limit at any point during your 1 hour session? If so, how long did it take to cool down and reset itself?

Thanks Michael for that useful feedback. Based on that I'll put one of those machines on my birthday wish-list.

Regarding TAFE welding courses- it seems like most of the posters here recommending...

Here's the duty cycle curve of the Bossweld S180 stick welder if anyone's interested.

If I'm reading the circuit correctly John, you will be injecting half-wave rectified AC into the motor winding via a high power resistor? So an approximation of DC injection? I'm keen to see the...

If it’s made in Australia I guarantee it will be written on the packaging. Ditto Germany, Japan, USA, Sweden, etc.



I won’t even attempt to drill SS these days with anything other than cobalt...

Nice job.

The Sydney Tools website says the 120A Italco Steve mentioned can weld steel plate up to 8mm. But the Bunnings website says their $249 180A Bossweld stick welder is also good up to 8mm. Obviously the...

Hi John,
Thanks for checking it out for me. To me a circular saw is hand-held and has a universal motor. Did you mean a table saw (with an induction motor)? My TS is 3HP and has a 300mm blade. Based...

Agreed. Done that many times. :2tsup:

I guess Old Croc got confused between Spain and Australia. No wonder we have wars!

So did I.

Nearly every Viper bit I looked at in Bunnings today was made in NZ. A few were marked “100% Australian Owned” which of course means “made in China”.

That looks OK to me. I'd leave it as is. As soon as you start using the lathe it will be covered in grime anyway.

I made some London pattern handles for my files. I think they are really designed to go on chisels but they work great on files too. Very comfortable. I made them to the design shown, which I found...

I definitely saw "Made in China" on the packaging of some of the smaller Viper bits in Bunnings last week. Interestingly, some older stock of the same sized bits were made in NZ. So maybe a recent...

Oz, NZ and China. Wouldn’t be surprised if they are slowly shifting all manufacturing to China. I’ll ask the rep next time I see him.

OK, well it's not that then. You are correct about not requiring the threading dial, so it's not that either.

The thread on the brass looks a bit like a buttress thread. Did you have the thread...

For me, my dislike of arc started 40 years ago with a basic transformer welder with two voltages (70 and 140V from memory). I could never get an arc to strike and the rod would stick solid to the...

I'm trying to work out what triggered the rant?

I reckon AO is fine for odd jobs. You can cut, weld, braze, silver solder, heat treat and bend with it. 3mm thick seems to be about the practical limit for welding/brazing. Otherwise the tip size,...

How hard are we talking John? Roughly how many seconds to come to a stop?
In any real world scenario there's also going to be the rotating mass of the machine to bring to a stop (pulleys, spindle,...

You had your compound set on the 30 degree mark, which on the Hercus is actually 60 degrees off perpendicular. So when you advanced the compound you were getting too much movement to the left (Z...

I've always believed the line between the 18 and 45 is in the wrong place, because there's no way you could get the same thread pitch with two different gears and with the levers in the same...

Did you mean BXA-200 Mal?

I call BS. How long do you reckon the power supply would last under those conditions?

I reckon it is.

Double the power consumption, but for less time. Certainly not double the energy consumption. And isn't Rusty's ganged-up compressor the same concept as the Chicago Air multi-motor compressor, albeit...