A Real Grind
Hi there fraternity.
This is really part 3 of the bowl turning postings and I have included it as an alternative to purchasing a slow speed bench grinder or a Tormek.
Now as you know the top of the range T8 with accessories can push you towards a thousand pounds and poor retired plumbers have short arms and long pockets.
Now I soon found out that turning chisels quickly lose their tip and dull quickly especially on hard woods. My existing grinder is an exceptional tool but itís far too fast for grinding tools at 1400 rpm, and I found out to my cost that tool steel burns very quickly.
So, I decided to go down same route as my wood lathe and install a second inverter.
I bid on E Bay for a Teco E150 3ph to 3ph frequency inverter. Brand new, never out of the box. Went in at the starting bid of £60 and no other bidders. Mine for £62.50p including postage. Retail cost is about £500 inc vat.
I like a separate potentiometer, (speed control) again E Bay £60 with about £25 for connections, isolator and junction box from Screwfix.
As you will be aware chisels have a wide range of cutting angles, I therefore decided to alter my grinder platform which is usually set at 90 degrees to the wheel. I re-engineered the platform to make it adjustable to suit any angle and fitted a larger platform which is easily adjustable by use of a side lever.
I have fired it up and it surprisingly works just fine. I can now run the grinder between 0rpm up to 1400rpm without any loss of power.
I am now looking at getting some form of water retention incorporated, but as yet not sure how to achieve this. Might also change wheel for a finer one.
I am now confident with my new improved razor-sharp chisels I can now do more serious injuries to my digits.
I hope this post will give the forum an alternative to expensive methods available at retail level, and should anyone decide to go down this route please feel free to contact me for any further information or assistance, especially on the wiring.
Should you decide itís for you please remember your inverter must have input related to your household supply i.e. 240v single phase or 415v 3ph and it must be equal or greater than the KW and HP of your motor.