Renlaw is South Africa’s leading machine blade manufacturer and can offer cutting-tool optimization to improve the performance of industrial blades in a number of ways.


We offer PVD-coating which results in a very strong bond between the coating and substrate, giving the tooling the physical, structural and tribological properties of the coating film. All of our different coatings have some variation in their properties in order to augment their performance in specific applications.

PVD coating increases the life of blades by increasing the surface hardness and reducing the coefficient of friction.

The average relative micro-hardness of our PVD coatings is well over 80 HRC. When this hardness is compared to 58 – 62 HRC of tool steel, 62 – 65 HRC of HSS, or 70 – 76 HRC of tungsten carbide, one gets a better idea of the comparative hardness of these coatings. This higher hardness gives cutting- and forming-tools a much greater protection against abrasive wear.

The coefficient of friction of PVD coatings can be significantly lower than uncoated tool substrates. For forming tools, this low coefficient of friction means that tools work with less force due to reduced resistance. In cutting applications, reduced friction means that less heat is generated during the machining process, slowing the breakdown rate of the cutting edge. In slide wear applications, the coatings greatly reduce the tendency of materials to adhere: this reduces friction and movement restriction.

How much of an increase in tool life should be expected after PVD coating?

Conservative estimates show that PVD coated tools last between two to three times longer than uncoated tools. Many applications have shown increases in tool life that exceed ten times that of an uncoated tool.  When a customer works with our technical staff to match the appropriate coating with their substrate and application, the results can drastically increase the life-span of tools, save time and ultimately make the most financial sense.


Our highly-experienced engineers working alongside our customers are able to change the cutting-geometries and materials of blades to improve both performance and blade life. Our engineers also consult with machine manufacturers and process developers to offer a range of cost-effective, high-quality cutting tooling. In addition to standard procedures we are able to offer non-standard tooling and geometries engineered to suit specific client applications.

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