The Radius Master RM-48 uses a 50 x 1220mm (2″ x 48″) abrasive belt and gives you seven distinct grinding surfaces in a single machine — five contact wheels of varying diameters, a free-floating slack belt zone, and a flat platen — all accessible in seconds without tools. A quick-release tilting head and pivot mechanism let you swing the entire machine from vertical to horizontal orientation in moments, making every station accessible at the angle that suits your work.

The Series 2 design introduced measurable improvements over the original: sharp square corner notching is now achievable on both sides of the belt, belt tracking has been refined for heavy-duty ceramic-backed belts, and the head height has been increased for improved platen face work. Belt changes take as little as 6 seconds.

The single-speed RM-48 runs at a continuous belt speed of approximately 914 m/min (3,000 ft/min), driven by a robust 1.5 kW motor on 240V/10A Australian power — no phase conversion required. The machine is overload protected and totally enclosed for durability in commercial workshop environments.

Originally designed by John Price — a tool and die maker who spent 45 years refining belt grinding machinery — Radius Master was a winner of the ABC’s The New Inventors. In 2025, the brand was acquired by NIROC, Australia’s leading manufacturer of handcrafted metalwork tools, ensuring the machine continues to be manufactured and supported on Australian shores.

The RM-48 is used daily across industries including:

Knife making & bladesmithing — hollow grinds, bevels, finger choils, edge refinement
Engineering & fabrication — weld blending, de-burring, part shaping
Aerospace — precision finishing of aluminium and titanium components
Medical equipment manufacturing — instrument finishing and polishing
Rural & agricultural manufacturing — farm equipment fabrication and repair
Automotive & motorsport — chassis, roll cage, and exhaust fabrication
Jewellery & goldsmithing — fine radius work and polishing
Sculpture & art metalwork — form shaping and surface finishing

Features & Specifications

Feature	Specification
Make	Radius Master
Model	RM-48 (Series 2)
SKU / Stock Code	L096
Belt Size	50 x 1220mm (2″ x 48″)
Number of Work Stations	7
Contact Wheels Included	5 (25mm, 38mm, 44mm, 50mm, 88mm diameters)
Additional Surfaces	Slack belt zone, flat platen
Motor Power	1.5 kW (2 HP)
Voltage	240V / 10A, 50Hz (Australian standard)
Motor Speed	1,400 RPM
Belt Speed	~914 m/min (3,000 ft/min)
Speed Control	Single speed
Belt Change Time	~6 seconds
Machine Orientation	Vertical and horizontal (tool-free tilt)
Motor Enclosure	Totally enclosed, overload protected
Warranty	2-year commercial warranty
Design Life	20 years
Net Weight	50 kg
Country of Origin	Australia

Included in the box:

RM-48 belt grinder machine
Pedestal / tilting stand
Base plate
Tool rest
Notching tilt table
5 × contact wheels (25mm, 38mm, 44mm, 50mm, 88mm)
1 × zirconia abrasive belt

Company Information

Features & Specifications

Included in the box:

Metal Working Machines

Sandvik 26mm Parting Block 151.2-21-30

Radius Master RM-48 Pedestal Belt Grinder & Linisher — Series 2