What is revolution?

Revolution means how many revolutions the tool makes in one minute. In the machining program that moves the machine tool, it is expressed by "S". In calcula... 詳細表示

What does drill feed rate (mm/rev) mean?

It indicates how many millimeters the drill advances per one revolution. In OSG’s drill catalog, recommended feed rates (mm/rev) are listed as ranges for ma... 詳細表示

What does cutting speed mean?

Cutting speed is the speed at which the outermost part of the tool moves in one minute. Symbols are denoted by Vc. The unit is (m/min). The cutting speed (... 詳細表示

What spindle speed should be used whe...

As a guideline, reduce the spindle speed to 500 min-1 or less when inserting a long drill (whether carbide or HSS) into a guide hole. For very long drills, s... 詳細表示

Is a centering process always necessa...

Centering is performed to improve hole position accuracy and to suppress unstable behavior at the hole entrance during machining. However, if there is no st... 詳細表示

Do you need to drill a pilot hole bef...

Do you need to Pilot hole for large drilling? If you have enough mechanical horsepower, you don't need Pilot hole. When machine horsepower is insufficient,... 詳細表示

Even though I perform centering, the ...

When the drill starts contacting the workpiece from its shoulder, you cannot achieve accurate hole positioning. Issue Example ・Using a starting drill with ... 詳細表示

Is there a formula for calculating th...

Experimental Formulas for Estimating Thrust Force, Torque, and Required Power When considering the clamping method or fixture design for a workpiece, it is ... 詳細表示

Why does a drilled hole become polygo...

It is likely caused by drill runout during machining. Possible Causes ① Runout when mounting the drill 　Countermeasure: Keep mounting runout within 20 μm ... 詳細表示

Is there a tool to remove a broken tap?

Yes. Please use the “EX-H-DRL” Tap Removal Drill (also known as the Hard Drill). This drill is designed to crush the core of the broken tap and remove it. M... 詳細表示