SOSGA Arm for SM-72 and Gibson Grinders

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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Our SOSGA ( Strap on Surface Grinder Attachment ) arms are precision CNC machined in our factory from 6061 billet aluminium to ensure high quality and strength with minimum weight. This arm is required to attach your SOSGA to your Shop Master 72" or Gibson 72" belt grinder linisher.

Please see your SOSGA manual for instructions and tips on how to attach and setup your SOSGA.

Product Specifications

-6061 Aluminium billet

Included in package

-Tooling arm required to mount SOSGA to grinder

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 1 review
Brett McKay

This is a solid bit of kit. It was well packaged and easy to assemble and did exactly what it is intended to do-make metal flat. I would recommend this product to anyone.
Aussies doing it well, thanks Ewan

Precision CNC machined tooling arm

Our tooling arms are CNC machined from 6061 aluminium billet to ensure extreme rigidity whilst keeping weight to a minimum

Austrlian made

All 84 Engineering tooling arms are cut and machined from aluminium billet bar material right in our workshop in the Snowy Mountains

Quick change tooling arms

All 84 Engineering tooling arms are quickly interchangeable by simply loosening the arm handle and swapping out for another tool


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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