Variable Speed Disc Grinder

In stock! Usually ships within 24 hours.
Pickup available at 6 Geebung street Polo Flat NSW

Usually ready in 24 hours

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**We are currently out of stock of disk grinders, we expect to have more made on the 30/5/24**

Take your knife making to the next level with the 84 Engineering precision disc grinder. Disc grinders significantly reduce the hand sanding required to achieve a flat, high-grit finish on your blade bevels. Discs are also great for grinding billets flat or achieving accurate angles and flat faces on your ‘Wa’ style and other angular knife handles.


Our 225mm diameter discs are precision CNC machined from billet 6061 Aluminum, ensuring a perfectly flat work face. The Aluminum is lightweight and provides exceptional heat dissipation and rigidity. A 10ᵒ relief on the disc edge makes sanding into tight areas and grinding crisp corners a breeze. The disc is sized so that standard 230x280mm sandpaper / abrasive sheets can be used. We recommend using 3M feathering adhesive or kraft spray adhesive to attach sheet to disc, then trimming the excess.


The 84 Engineering disc grinder will plug into any standard 240v 10a power socket. The included Variable Frequency Drive (VFD) converts power to a 3-phase signal, driving the industrial 4-pole motor. The included VFD is tuned specifically for disc grinding and provides maximum torque throughout the programmed safe speed range. The ability to run the disc at low speeds means minimal heat build-up during high-grit finishing and shaping, and the 1440rpm on tap is useful for rapid stock removal and sanding of timber and synthetic handle materials.


The 230x120 powder-coated work rest is both angle and height adjustable. The premium indexing handles lock the rest securely at any angle ensuring your grinds will always be accurate and repeatable. Depending on the application, the ability to adjust the height of the rest makes for safer grinding and better abrasive utilisation.

Disc Grinder User Manual

Product Specifications

• 0.75kw (1hp) 4 pole 1440rpm 3 phase motor
• Variable Speed Controller tuned for disc use
• 0-1440rpm forward/reverse
• Industrial, hard-wearing powder coat finish
• 230x120mm rest
• Tool free angle adjustment

Included in package

• 0.75kw (1hp) 4 pole 1440rpm 3 phase motor
• Variable speed controller pre-wired with plug
• Angle adjustable rest
• User manual

Shipping Information

Our on-line store is open 24/7 and we ship Monday through Friday, excluding some holidays. Orders received for products without shipping restrictions on its product page will ship the following business day when received before 12:00 p.m. AEST. Orders in high demand will have an estimated production time listed on its product page and will ship according to the date listed.

Customer Reviews

Based on 4 reviews
Alex Dalco
The GOAT Disk Grinder

Purchased the disc grinder and I have not regretted it. Customer service was great. Delivered quickly after purchase. Easy to set up with excellent speed control. if I could give a higher rating, I would.

Mark McLean
Stix’s knives

Out standing Aussie made product

Justin Nancarrow
Brilliant gear and outstanding Australian small business

Sensational piece of equipment.

Milan Markovic
Variable speed Disc Grinder

I love this machine,build quality is fantastic. Very versatile and very powerful.

Precision CNC Machined Disc

Our discs are CNC machined from billet 6061 aluminium; designed with an uninterrupted disc face, 10ᵒ relief and accurate to <50micron rotating variance

Variable Speed

The Variable Speed Drive included is tuned specifically for disc use and provides maximum torque even at low speed

Fully Adjustable Rest

The 230x120mm work rest is coated with an industrial wear-resistant powder coat and is fully height and angle adjustable


We take pride in our quality and service
Dmitriy Popov

DP Custom Knives

Have been a long time customer of 84 Engineering and every product I have purchased has been manufactured incredibly well with very high attention to detail. Customer service has also always been top notch. You will definitely be well looked after here.

Jordy Kopetko

Deathrig Fabrication

Amazing Aussie made products - used daily in my workshop. Quality second to none

Dan Murray

Cafe Racer Garage

I have been using 84 Engineering belt grinders for many years, it's truly the one tool that gets the most use in my garage building motorcycles, It's one of those tools that you wonder how you ever did without! I highly recommend anyone working with steel have one! Dan - Cafe Race Garage -YouTube

Riley Burns

Knife Maker

Our 84 Engineering machine is the best in our workshop and the best we've ever owned. Their service is second to none.

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