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Belt Grinders

Torus Classic The $995 Proven Original

The Classic is my compact $995 aluminum 2x72. It now uses the same dual-axis tracking head as the Nova and Nebula, with a smaller footprint and a motor-clearance limit to check.

2 min readBy Rich Linville
Classic aluminum grinder fitted with a motor and abrasive belt on the shop test stand

I still build the Torus Classic 2x72 belt grinder. It is the compact aluminum machine that started the Torus line, at a $995 chassis price. The current Classic has the same billet-aluminum dual-axis tracking head as the Nova and Nebula. Its smaller footprint gives you another choice when space and budget matter.

What the Classic includes

The Classic frame is machined from 6061 aluminum. The chassis package includes a deep slack platen on its own 1.5-inch tooling arm, a 4-inch machined drive wheel and a 304 stainless ratchet tensioner. I assemble it, track a belt and run the machine before it leaves my Sterling, Illinois shop. The motor and VFD are separate.

Plain turned aluminum drive wheel with a hub bore resting upright in a padded wooden cradle on a dark bench.

A flat platen supports the belt for flat grinding, while the slack area lets the belt follow a curve. They are different working surfaces. Choose the surface for the shape you are making and keep the blank controlled. My guide to choosing a 2x72 explains what the larger belt platform makes possible.

Abrasive strip lying flat on a steel plate in front of a second strip clamped between two wood blocks, sagging in the middle.

The tracking head is current

I moved every Torus grinder onto the same machined dual-axis tracking head. Buying a Classic does not mean giving up that adjustment system. Its stainless ratchet tensioner sets belt tension without a spring to wear out. Check tracking after changing a belt or attachment; the mechanism gives you control, and you still need to set it for the job.

Check the motor clearance

The Classic has a compact 9×9-inch base and tilts through 90 degrees from vertical to horizontal. It clears a motor up to 12 inches long in the horizontal position. Measure a motor you already own before ordering. The Nova and Nebula use a taller frame on a 9×12-inch base for a longer motor.

Gray electric motor on cast mounting feet lying lengthwise on a dark bench beside a small tray of bolts and washers.

Leave room around the bench for that swing before choosing where to bolt the chassis down. A compact base saves bench space, but the belt, attachment and motor still need clearance. Plan the full working envelope rather than fitting the base into the last open corner.

Attachments and power

Standard 1.5-inch tooling arms make the Classic compatible with Torus arm-mounted attachments and many accessories built for that size. Check the receiver fit and attachment clearance when buying from another maker. An arm that slides in is the beginning of a fit check, not the whole check.

Solid square steel bar partly slid into a larger square steel tube, both resting on dark padded blocks on a bench.

My TechTop and KBAC-27D motor packages cost $1,195 for 1 HP on 120V or $1,245 for 2 HP on 220V. The drive arrives programmed for its motor; you finish the cord and plug wiring with the supplied guide. Add that cost to the chassis when you plan a powered grinder.

Where the Classic fits

The Classic suits a first serious grinder or a second station dedicated to one task. If you want the larger frame, my Nova article explains the aluminum choice and my Nebula article explains the steel one. Their chassis prices are $1,295, which is $300 more than the Classic.

Build your Classic after checking your motor and bench space.

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Rich Linville in the Torus CNC shop with a finished 2x72 belt grinder

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