How do you drill hardened steel

Whilst it is possible to cut hardened steel easily using an abrasive disk in a angle grinder it is much more difficult to drill. Drilling hardened steel with a normal drill but will not work as the material you are drilling is tougher than the drill bit itself. These are profi-line drill bits made by Artu. These drill bits will drill virtually anything including hardened steel, tough porcelain, masonry and glass.

The drill bits look like masonry drill bits but they are much tougher. You can also drill hardened steel with solid carbide bits but they are very expensive and brittle.

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These cookies do not store any personal information. Non-necessary Non-necessary. Hope that helps … some rambling of a German toolmaker and mech. To do the drilling correctly you first must figure out exactly what you are drilling. Then you look in your machinists handbook noshop is complete without one for speeds and feeds. Then use a milling machine or high quality drill press. Use flood coolant. The coolant type is important for a good finish and keeping the drill bit cool.

You can also find what type of coolant to use in your machinists handbook. If your bit heats up then it loses it hardness which makes it dull extremely quickly. Drilling is a battle of hardness and sharpness the hardest and the sharpest wins. You want the drill bit to win. You can purchase carbide drill bits at Enco or from MSC industrial supply co. Because there is no way to BS machining hardened steel. Advice on drilling through hardened steel?

Technical Technical Discussion.