Diamond disc wear - concrete floor grinders

“Mega Hire supplies equipment with the best quality blades and consumables to maximise the performance of your hired equipment”

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Mega Hire does not include the cost of diamond disc wear in the hire price for concrete floor grinders. The discs are measured with a vernier scale before and after use to calculate the disc wear.

We are asked frequently about how much you can cut / grind with 1mm of usage. The correct, but unhelpful answer, is “how long is a piece of string?”. Diamond disc usage is dependent on a large range of variables such as the age of the concrete, the aggregate used, the concrete strength (25MPA, or 35MPA), even how the concrete was finished when it was poured, but also how the equipment is used. Unlike some hire companies, Mega Hire uses the highest quality consumables in our equipment, so you can be guaranteed you get the most out of your hire.

The hand-held Hilti DG 1500 grinder includes 1mm of wear on a daily rate and 5mm of diamond wear on a weekly rate.

Selecting the correct diamond disc

A range of discs are available with varying grit densities, bond strengths and numbers of segments to suit different applications. Selecting the correct disc depends on the task and required finish.

Typically, it is best to start with a 30grit White disc (hard bond) and assess the wear rates and concrete grind as you progress. If progress is limited, this may be due to the hardness of the concrete, so switch to a 30grit Black disc (soft bond) which will respond better to hard concrete. For removing coatings such as tile glue, typically discs with less segments work better as they have larger open areas to disperse the material that is being removed.

Feel free to inquire for advice on selecting the best set up for your application.

Wear is charged as follows (per mm):

Concrete Floor Grinder 250mm - $40 (inc GST)

Concrete Floor Grinder 480mm - $35 (inc GST) per disc (the machine uses three discs)