Tool life miracle
RT 100 InoxPro achieves a breakthrough in high-temperature-resistant steel

As an experienced contract supplier in metalworking, Recker Technik GmbH was faced with a particular challenge: A highly heat-resistant steel was pushing their universal drills to their limits. But with the RT 100 InoxPro stainless steel specialist from Gühring, the company found the solution – and is now achieving twice the tool lives with the same precision.

Recker Technik GmbH from Eschweiler (Aachen) is a contract supplier of metal parts for a wide range of customers in the food industry, laser technology and mechanical engineering. The various individual and series parts are produced by a modern, automated machine fleet consisting of eleven CNC lathes and eight CNC milling machines, some of which are equipped with robots.

Working together to find the perfect solution (from left to right): Karsten Raßbach (Gühring), Kevin Schippers and Daniel Schultes (both Recker Technik).

The material for the components depends on the customers’ requirements, but stainless steel materials play a major role, as production manager Daniel Schultes explains: “We specialise in highly heat-resistant steels and stainless steels. This is our core business, and we have a huge amount of expertise in this area.”

But one material proving to be difficult, even for the experienced metalworkers: For a check valve in a gas pipeline, a customer wanted a particularly stable material and opted for an extremely heat-resistant steel (1.4825). A material that was pushing the previous drills to their limits.

Universal drills are blunt after drilling one hole

Nahaufnahme eines InoxPro-Vollhartmetallbohrers

In the field of drilling, Recker relied on universal drills made by one of Gühring’s competitors for 25 years. But in the highly heat-resistant material, they quickly reached their limit: “We simply couldn’t break through with the universal drills,” recalls Schultes. “After every single hole, the drill tip was blunt.” Even with different cutting values and cooling techniques, the machining experts could not get a grip on this material – after a very short time, the drills began to show typical signs of wear and became unusable. Schultes realised: A material specialist is what we need.

The production manager contacted his Gühring sales representative, Karsten Raßbach, who had already been successfully advising the company in the field of thread milling. After looking at the component, material and machining conditions, Raßbach identified the tool that was needed here: “With this highly heat-resistant material, I immediately opted for the RT 100 InoxPro because I had already achieved very good results with this tool with other customers. There was no need for long tests here, we only discussed the cutting values and then the tool began being used straight away.”

RT 100 InoxPro delivers double the tool life

The plan works: The RT 100 InoxPro shows much less chipping on the cutting edges and the coating lasts much longer. 64 holes with a depth of 30 millimeters can be drilled with just one tool. After that, the first signs of wear on the coating become noticeable, but the limit has not yet been reached.

“The InoxPro did its job in this material and worked fantastically well where other drills simply failed.”

Daniel Schultes
Production Manager, Recker Technik

Daniel Schultes is enthusiastic: “The success of the Gühring drill bit is significant: We have never used material specialists before. But the InoxPro did its job in this material and worked fantastically well where other drills simply failed.” Recker Technik now also uses the RT 100 InoxPro for other components. For example, the drill has machined a series of 110 bronze parts (2.0965) without becoming blunt. “In general, we achieve at least twice the tool life with the InoxPro compared to competitor products and at a better price-performance ratio”, summarises Daniel Schultes.

Thanks to this success, the production manager now wants to switch to Gühring tools in other areas such as milling and reaming. What convinces him about Gühring? “I’ve been working in metalworking for 16 years and, like every manufacturer in this field, I know that when it comes to drilling and thread cutting, Gühring is number one. Gühring has grown up through drilling and is therefore an absolute specialist in this field.”

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Tool life miracle RT 100 InoxPro achieves a breakthrough in high-temperature-resistant steel