Introducing Weldclass Opti-5 Series Wire Brushes

Brushes engineered for optimum performance on 125mm / 5" angle grinders


Why ?

The most popular and widely used angle grinder size in Australia is 125mm/5", especially in industrial applications.

However, many wire brushes that are used on 125mm grinders have been actually been designed for 100mm and 115mm grinders. This is because most wire brush designs originate from Europe, where the most popular angle grinder size is 115mm. 

When used on 125mm/5" grinders, these brushes deliver less-than-optimal performance, efficiency (work rate) and tool life. 


The RPM factor

A Cup Brush - for example - designed for 100/115mm grinders cannot be more than approx' 75mm diameter.  This size limitation limits the volume of wire in the brush, and the brush surface area.. which then limits it's performance. 

So why does the grinder size limit the design/size of the brush ?

This largely has to do with the maximum RPM / speed. Smaller grinders have a higher RPM and this means that the brush has to be smaller and lighter to operate a) safely and b) smoothly without vibration.

Grinder Size Approx Max RPM*
100mm 15,000
115mm 13,000
125mm 12,000

*Approx maximum safe RPM rating for blades/tools used on each grinder size. Actual grinder rpm will vary from model to model.


So why use Weldclass Opti-5 series brushes ?

Weldclass Opti-5 brushes are engineered to be the optimum size and weight to match the typical RPM & power range of 125mm / 5" grinders.

With Opti-5 brushes, you can expect;

  More wire per brush = Longer brush life

  Larger brushing surface area = Faster work rate & higher efficiency



The Opti-5 Range

Click on the images below to view full product details:

Cup Brushes
Weldclass Opti-5 Cup Brush 92mm


Bevel Brushes
Weldclass Opti-5 Bevel Brush 125mm

Pipeline Wheels
Weldclass Opti-5 Pipeline Wheel Brush 125mm


Made in Europe

Weldclass wire brushes are 100% made in Europe, using European high-tensile steel for long brush life. 


Can Opti-5 brushes be used on other size grinders?

Opti-5 series brushes are rated at maximum speed of 12,200 rpm and can be used on any grinders with a maximum speed of not more than 12,200 RPM, and where the brush diameter does not exceed the rated grinder size. 

This means that Opti-5 brushes can also be used on most 180mm/7" and 230mm/9" grinders.



View the full range of Weldclass brushware





Disclaimer: While all care has been taken, Weldclass accepts no responsibility for any inaccuracies, errors or omissions in the content of this webpage or in any attachments. The information given is of a general nature only and does not take into account the specific circumstances of any individual person or organisation. Some information given may reflect the personal opinion of an individual. All product specifications are subject to change without notice. Any comments regarding the intended or suggested application for any product is for general description and identification purposes only. It is the sole responsibility of the user and/or owner and/or purchaser to select the appropriate product for their intended purpose and to ensure that the product selected is capable of performing correctly and safely in the intended application. E.&O.E.



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