About Us

Radius Master’s designer John Price, a tool and die maker by profession, had been manufacturing belt grinding machinery, including the multi tool, for 45 years when he retired in 2025.

This experience, together with the desire to build better machinery that does not follow conventional time wasting designs has produced award winning machinery that has no equal in terms of convenience, performance and durability.

Without the need for a box of add-ons and spanners, we have proudly achieved the most user friendly machinery that out-performs, out-lasts and can make a very significant improvement to product cost and quality.

Awards
Winner of ABC’s The New Inventors.

In 2025 Radius Master Machinery was purchased by Niroc. Corin Urquhart, lead maker at Niroc has been using belt grinders for knifemaking and toolmaking for over 20 years. He has extensive industry experience with most commonly available brands of belt grinders and abrasives and their applications.

Corin is dedicated to manufacturing in Australia, and every effort is made to support local manufacturers in all aspects of the Radius Master business.

Australian companies involved in the manufacturing of Radius Master Belt Grinders.

Techtop Aust Motor supply of 1.5 kw (2 hp motor)

Invertec Variable speed drives MFG in UK

ABC Castings High tensile aluminium castings of chassis and pulleys

Kelseal Rubber All wheels are coated with a hard-wearing heat resistant compound which can withstand high R.P.M. This replaces the previous polyurethane coatings.

J.F.D. Manufacturing Precision CNC machining of chassis

Statewide Bearings Highest quality bearings Japanese MFG

Peak Powder Coating Attractive hard wearing chip resistant finish

RJ Heat Treatment Case hardening and black oxide coatings

Our Belt Grinder Videos

Original Belt Grinder Summary

A high performance belt grinding machine that outperforms the competition.

Variable Speed Belt Grinder

Step-less control from 400rpm to 1600rpm for difficult to grind materials.

Belt Grinder Demonstration

Ben Orford’s demonstration of the features and utility of the RM48 Belt Grinder

Radius Master Belt Grinder Demonstrations

Watch our Radius Master Belt Grinders in action here

Testimonials for Radius Master Belt Grinders

Barry Gardner – Gardner Knives

Gardner Knives has been a full-time business in Adelaide for the past 12 years, with workshops and high-end knives. When we started our business, I was determined to start off with the best belt grinder on the market. I remember seeing Radius Master on the New Inventors, years previously, and was intrigued. Not only have I used the awesome Radius Master over the last 12 years, but all our students use them on a daily basis. I tend to give grinders a hard time and I only have one word to say “Indestructible”. So for anyone, particularly in the knifemaking world, if you don’t have a Radius Master or two in your workshop, you’re missing out.

Tharwa Valley Forge – Australian Bladesmithing School

The Radiusmaster II is the latest creation from the inventive mind of John Price. The original Radiusmaster was a innovative machine with five different wheels on one belt. John was recognized on the ABC television show “The New Inventors” for his invention. John has taken on board much of the feedback from the original Radiusmaster and made some performance improvements in the second version.

I was fortunate enough to pick up two of the new Radiusmaster I l’s from John’s factory in Sydney. What an amazing workshop! John works with a small staff in making each of the machines onsite. His equipment and jigs are fascinating – presses and benders, mill, lathes and all kinds of jigs and fixtures to make the parts. Especially interesting was the old Radiusmaster on a 45 degree angle used for grinding the rubber wheels to size. A platen holds the wheels square against the belt, but the belt drifts across the wheel, ensuring no one part gets too hot to melt the rubber. You can see the man’s inventive brain hard at work in the shop.

Greg Kilmartin – Kilmartin Automotive Sheetmetal

We originally saw your Radius Master on the New Inventors program. Being very impressed we purchased one immediately and it really has proven to be one of the most useful pieces of plant. The Radius Master is a superbly designed and most versatile piece of machinery; we use ours for component finishing, but its finest hours have been with our tool making. Some fantastic jigs and press tools have been made very efficiently with the help of your brilliant machine.

We can go to it 50 times a day!

Great to see Australia can still lead the way in design. We wish you a great future.

Cheers and thanks from all at Kilmartin Automotive Sheetmetal.
Greg Kilmartin

The world's best belt grinders

Australia: 0415 245 405