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End Mill Series – HSAM1. Material. Recommended Cutting Values – Side Cutting ... Finish cuts typically require reduced feed rates and/or higher spindle speed ...

The various points are standardized in DIN 1412 shapes. The most common form for step drills is the split point (shape C).

Our step drills have a small point angle of 118° and requires less pressure when centering in the material. The larger the point angle, the higher the contact pressure and the centering in the material requires more pressure.

CBN stands for cubic crystalline boron nitride. Boron nitride is a chemical compound of boron and nitrogen. The addition "cubic" describes the crystal structure of the chemical compound. CBN is much harder than conventional abrasive materials such as silicon carbide or corundum and is used for grinding hardened high-speed steels (HSS).

The step angle is 90° and determines the transition from one step to the next. The transitions are used for chamfering or deburring the hole.

If you read texts about step drills on the Internet, you will always stumble across the abbreviation CBN. But what does it mean when step drills are produced using the CBN process?

Use coolants and lubricants for cutting metals. By using them you can considerably extend the service life of the step drill.

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The head of step drills can be compared to the head of twist drills. Centering in the workpiece should be as easy as possible with both drills. The point angle is responsible for this.

Step drills can have spiral and straight grooves. With the spiral groove, chip removal is much better than with the straight groove. The service life can be significantly extended by good chip removal.

Step drills with shape C center perfectly in thin sheet metal and are suitable for drilling in solid and high-alloy steel. The point cut is also ground using the CBN grinding process.

Step drills have, as the name suggests, different steps that cut the desired diameter. Before we take a closer look at the characteristics, we would like to briefly go into the term "CBN process".

Step drills are ideal for sheet metal working and are suitable for cutting non-ferrous metals, stainless steel sheets up to a thickness of 1.5 mm, thermoplastic and thermosetting plastics and all current steel sheets up to a thickness of 4.0 mm. You can tap, drill and deburr in one step with the step drill.

The drawing shows the point cut of a twist drill from the side and from above. The point cut of step drills and twist drills is the same.

Step drills are available in various variants in the tool steels HSS and HSSE-Co 5 and the coatings TiN and TiAlN. You can find our complete product range of step drills under Products > Step drills.

The groove profile serves as a channel system for collection and for chip removal. It is important that the chips are removed quickly, as otherwise high heat will develop and the drill will burn out. Non-breaking chips in particular are transported easily, as with a twist drill.

M2 x 0.4, 0.4, 6g, 1.981, 1.886, 1.721, 1.654, 1.548, 1.408. M2 x 0.4, 0.4, 6h, 2.000, 1.905, 1.740, 1.673, 1.567, 1.427. M2 x 0.4, 0.4, 4g6g, 1.981, 1.886 ...

The point angle is located at the head of the step drill. The angle between the two cutting edges is measured at the point. As already mentioned, a point angle is required so that the step drill can center itself in the material.

Most twist drills have a point angle of 118 degrees. Ninety degrees are used for hard plastics subject to wear, 130 degrees for soft and tough materials and 140 ...

We carry step drills with tool steels HSS and HSSE-Co 5 and with coatings TiN and TiAlN. Depending on the tool steel and coating, harder or softer materials can be cut.

Step drills usually have two cutting edges and profile of flutes. The cutting edges cut the material. We have step drills with even three cutting edges with straight flutes in our product range.

The production of step drills by using the CBN process enables measuring and shear cutting edges due to the higher hardness during the grinding process. The material structure is cut through smoothly by the much harder abrasive material.

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The step angle of step drills is 90° and defines the transition from step to step. The transitions between the individual steps should be as easy as possible and hardly noticeable.

Due to the CBN-deep-ground spiral grooves, the blades, in contrast to the conventionally milled flutes, are burr-free and sharp. This reduces the formation of built-up edges and cold welds on the cutting edges, resulting in a significantly higher cutting performance.

The point angle and the point thinning ensure easy centering and a easier tapping into the workpiece. As soon as the step drill has been drilled through, the two or three cutting edges are already in place. The burr-free and sharp cutting edges cut the workpiece and guide the chip over the groove profile.

Feb 4, 2022 — Changing the tool holder, holding the shank deeper, and using a shorter tool will often solve these issues. Machinists should also check their ...

Further information about the different forms can be found in our blog post " Point cuts and point thinnings of twist drills for metal cutting".

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This calculator gives guideline cutting speeds for a specified diameter. Slide the diameter back and forth and the table will update for the various materials.

A variety of drills can be used to cut circular holes in workpieces. In this article you will find out in which applications step drills are used and what features they have.

202346 — It can keep a screw from walking when trying to be inserted into a material with a slick surface like melamine or MDF. When drilling into hard ...