切削工具の基礎 | オーエスジー

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The effect of the twist angle of the drill

What is the effect of the torsion angle of a drill?

As for the effect of the helix angle, the standard twist is 30°.
For weak twisting, the sharpness is reduced, but the cutting edge strength is high.
The stronger the torsion angle, the sharper the edge, but the lower the cutting edge strength.
The stiffness of the drill is higher with weak torsion.

No : 7618

公開日時 : 更新日時 : 2024/11/04 14:49

カテゴリー： Cutting tool fundamentals

What is flute length ?

What is flute length ?

flute length is the length from the tip of the drill to the end of the groove.
The drill must have space to drain the chips that arise during machining.
Make sure you have enough flute length of the drill to be used for the depth of the hole to be machine

No : 7622

公開日時 : 更新日時 : 2024/08/28 02:29

カテゴリー： Cutting tool fundamentals

What is a back taper?

What is a back taper?

The outer diameter of the drill is tapered from the tip to the shank, and it is attached to avoid friction with the inner surface of the hole during cutting.

No back taper

With back taper

No : 7623

公開日時 : 更新日時 : 2024/08/28 02:29

カテゴリー： Cutting tool fundamentals

What is Lip Height?

What is Lip Height?

Lip height is the difference in the height of the cutting edge when the drill is rotated. If the lip height increases, it will be cut only with one blade, which will result in unstable processing. As a result, it is more likely to cause hole enlargement and breakage.

No : 7627

公開日時 : 更新日時 : 2024/11/04 14:49

カテゴリー： Cutting tool fundamentals

What is a shank with a tongue?

What is a shank with a tongue?

It is a shank with two flat sides at the end of the shank.

The tongue is mainly used for detenting.

For our drills, EX-GDXL is the applicable specification.

No : 7631

公開日時 : 更新日時 : 2024/08/28 02:29

カテゴリー： Cutting tool fundamentals

What is internal refueling? What is external coolant supply ?

What is internal refueling? What is external coolant supply ?

Internal lubrication refers to tools such as Tap , drills, end mills, etc.

A hole (oil hole) is drilled from the shank to the cutting edge, and an oil agent is passed through the hole.

No : 8556

公開日時 : 2024/10/22 00:00 更新日時 : 2024/11/04 14:49

カテゴリー： Cutting tool fundamentals

What is a Cutting Tap?　What is forming tap ?

A cutting tap is a tap that processes internal thread by scraping the workpiece material.
straight fluted tap , spiral fluted tap and spiral pointed tap correspond to cutting taps.

forming tap is a tap that processes

No : 10684

公開日時 : 2022/02/02 10:32 更新日時 : 2022/05/07 11:05

カテゴリー： Cutting tool fundamentals

Hardness Conversion Table

Hardness Conversion Table

OSG's general catalogue has an approximate hardness conversion table for the Rockwell C hardness (HRC) of steel.

Please use it when you want to convert hardness Shore (Hs) or tensile strength (N/㎟) to HRC.

No : 958

公開日時 : 2019/02/28 12:59 更新日時 : 2024/08/28 02:29

カテゴリー： Cutting tool fundamentals

Coating performance of tools < coating >

Coating performance of tools < coating >

There is a list by coating type.

You can refer to it from the website of OSG Coating Service Co., Ltd., a group company of OSG Co., Ltd.

Please refer to the "Coating Lineup List" at the link below.

No : 923

公開日時 : 2019/02/28 12:58 更新日時 : 2024/08/28 02:29

カテゴリー： Cutting tool fundamentals

What is a coating on a cutting tool? < Cutting Fundamentals (8) >

Not only the base material of tools, but also various things have a relationship between "hardness" and "toughness".

The harder it is, the less likely it is to wear out, but it is easier to chipping .

The tougher it is, the more difficul

No : 332

公開日時 : 2019/02/25 16:43 更新日時 : 2024/08/28 02:29

カテゴリー： Cutting tool fundamentals

切削工具の基礎 | オーエスジー

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