Общий каталог Widia 2017 - страница 1485

Deep-Hole Drills Application Rules

6) Coolant

• For increased stability, the coolant channels of the
• Make sure that the coolant supply reaches the cutting

TDD10* are smaller than on typical WIDIA™ drills. edge before drilling begins.

• Steady supply of coolant delivered to the cutting edges
• Pressure by diameter: <5mm 40–50 bar maximum;

necessary. If coolant supply is not steady or is unequal >5mm 25 bar minimum.

through both channels, check: — Coolant fi ltering system. — Sealing of adaptor/spindle. — Chips blocking the coolant

hole on the drill shank.

7) Minimal Quantity Lubrication

• On MQL applications, make sure that the coolant is directly supplied from the chuck into the back end of the drill shank (without gap) to avoid leakage.
• Pressure should be between 1–10 bar depending on coolant hole size.
• Spray contains an amount of oil less than 50 ml/h.
• If required, the shank can be evenly optimised for MQL

MQL back end according to DIN 69090-3 applications with enlarged 90° chamfer instead of 40°.

8) Shanks

• Other than normal SC Drills, TDD10* series have a “Z”
• The clamping force is better with increasing diameter.

shank, increasing with 1mm-steps. If required, DIN-shanks (even, 2mm steps) are available

• For drills with uneven shank size, use reduction sleeves as custom solutions. to adapt the shank to the customer´s toolholder.

Achieve the best tool performance with hydraulic chucks.

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