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

List of pipe screw sizes and pitches How is it different from Unifi?

The reference dimensions (outer diameters) of R, Rp, Rc, PT, G, and PF for pipe screws are shown in the following table.

Reference dimensions and pitch of pipe screws

Tube size Direction(A)

Size (B)

Reference dimension (outer diameter

No : 368

公開日時 : 2025/03/21 00:00 更新日時 : 2025/04/17 07:24

カテゴリー： Cutting tool fundamentals

Cutting Tool Handling

Cutting tools are made of very hard materials.

If the tools hit each other, they will chipping , so please store them in a case.

Cutting tool storage
・ Add a partition to each storage box.
・ Attach a cap, net, etc. to the cutting edge.
・Use a plastic case.

No : 334

公開日時 : 2025/03/07 00:00 更新日時 : 2025/04/17 07:24

カテゴリー： Cutting tool fundamentals

What is metal cutting? < Cutting Basics (1) >

Why does iron cut with iron?
"Metal on the cutting side" is more than "metal on the side to be cut"
・Stiff
・ Sharpness
・ Because it builds momentum and cuts.

How does cutting work?
If the rake angle is large, the resistance is low and the sharpness is improved, but the cutting edge is sharp and

No : 340

公開日時 : 2025/03/07 00:00 更新日時 : 2025/04/17 07:24

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

切削工具の基礎 | オーエスジー

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