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October 17, 2022

Knowledge about sintered cutting discs

SINTERED BLADES--Sometimes referred to as Continuous Rim Blades, these blades are more expensive but tend to be longer lasting and offer better performance. Sintered blades are made embedding diamond particles in a metal bond around the rim of the blade – the diamond extends through the full depth of the rim and so as the metal bond rim wears away, new diamond particles are exposed and keep the blade cutting.


These blades are available in premium or economy versions – the manufacturing process is essentially the same but a premium blade will be better quality and should give a cleaner cut. Please note that even though the sintering process will give a more durable blade, they can easily be damaged by incorrect usage (insufficient cooling, rock jams, etc).

For smaller blades, the sintered metal bond rim will be continuous around the whole rim while for larger blades (say above 16″ diameter), there may be sections cut out along the rim to improve coolant flow and debris removal – these are called Segmented Blades.

The 301 Gemking Blade made by Barranca/MK Diamond is often called a Notched Rim Blade but this is a bit misleading. This one is still a sintered blade but the deep notches along the sintered metal bond rim allow for better coolant flow. This blade is designed for cutting of harder material but MUST be used with oil – water should not be used with these blades. This blade is just a slightly different type of sintered blade.

T180


As the diamond particles are embedded in a metal rim, over time the surface of the metal bond can glaze over the diamond particles and affect cutting performance. If you feel that the blade is not cutting as it should, we recommend [dressing" the blade by cutting into it a few times with an abrasive material (ie. dressing stick, old silicon carbide wheel, house brick, etc). This process re-exposes the diamond particles allowing the blade to cut properly again.

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