Thursday, February 15, 2018

Making of the DG-9 9" Disc Grinder (coming soon!)

It's been a long few wintry month and a half and cabin fever seems to be getting the best of me. While staring out the window at the snow, I started day dreaming about making a 9" disc grinder.

Soon parts started to arrive...Hopefully spring will too.

The KBAC-27D is a Variable Frequency Drive (VFD) that can control the speed and rotation of a three phase motor up to 2 horsepower, rated 208/230 VAC. This VFD has an advantage when used in the gritty environment of a belt grinder because it's sealed up and dust isn't allowed to get inside.

The motor is an Ironhorse 1.5 horsepower 4 pole (1725 RPM) three phase unit from Automation Direct. Similar to the one I used in my Sayber OSG but this one runs at half the speed.

The 9" disc is machined from a solid aluminum billet. I ordered this from It is a 9" disc that has a 1° bevel on the face, so really it's a tiny bit like a cone. This bevel is to help prevent the knife that you are grinding from catching the opposite side of the disc and flinging it upwards. 

Along with the basic frame details, I will be putting up some posts on how to wire the KBAC for forward and reverse and installing the main power switch. 

Stay tuned,


Thursday, January 18, 2018

Got a New Set of Wheels!

New Wheels for Another Belt Grinder Project

In advance of my third grinder project I ordered up some of Oregon Blade Maker's 4 piece aluminum wheel set with a drive wheel having a 5/8" bore.

It should be noted that not all motors can use this drive wheel. Only motors with 5/8" keyed shafts can use this set. Fortunately, Oregon Blade Maker offers a set for 7/8" and 24 mm motor shafts. See the links below for the different bore sizes

The parcel came very well packaged. These made it half way to the North Pole!

Each wheel was individually wrapped in bubble wrap.

The machining on these wheels is very good. All the bearings are sealed and take a 1/2 bolt to mount.

This set has a drive wheel with a 5/8" bore and has a 3/16" keyway. This will work for a NEMA 56 frame motor. NOTE: if your motor is has a different size shaft, say 7/8" then be sure to order the correct set.

The 4" drive wheel and 3" tracking wheel are crowned meaning they have an arch to the part of the wheel where the belt will run.

This is where you get the long 1/8" hex wrench down to lock the setscrew into the keystock

And I got this cool sticker to go on my machine!
If you are looking to buy a wheel set these are the one's I recommend:

NEMA 56 frame motors have a 5/8" shaft then look at the 5/8" bore four piece aluminum grinder wheel set

NEMA 143T and 145T motors have a 7/8" shaft then look at the 7/8" bore four piece aluminum grinder wheel set

If you are using stepped pulleys, pillow blocks and shaft is a 3/4", the 3/4" bore drive wheel comes in a set of four wheels. 3/4" bore four piece aluminum grinder wheel set

If you have an IEC motor with a 24 mm shaft, presently only the glass filled nylon drive wheel is available. 24 mm bore drive wheel only. But you can build a set by adding a three piece wheel set to the drive wheel.

Happy grinding!

Thursday, December 21, 2017

Merry Christmas

Merry Christmas Fellow Makers!

It's a busy time of year for most of us with holidays, visiting friends and family. It's also a time to reflect on the past year and be thankful for everything we have. A year certainly goes by faster as we get older. ;-)

I'd like to say a great big thank you to all my friends in the knifemaking community and wish them and their families all the best in this holiday season.

My friend Mike Ware has a YouTube channel called Absorbed Self Reliance. Mike put together an Oregon Blade Maker 2 x 72" grinder with a VFD and motor in which I offered him some help with the electrical things.

Thank you Mike for this great look at your machine. We  hope it serves you well.

Look after each other and remember to support your local food bank.

All the best for 2018!
Happy grinding!


Saturday, November 11, 2017

Some Honesuki Ready for Shipping

Three honesuki wa made from AEB-L ready for new homes. 

The left knife is desert ironwood with jade composite spacer. The middle one is stabilised koa with stainless and brass. The right one is rennaisance acrylester with brass and black paper micarta.

Lots more to do before Christmas!