WIDIA - vrtání | KL-TECH s.r.o. | www.klte.cz widia-vrtání | Page 127

Solid Carbide Drills Deep-Hole Drills Application Rules

6) Coolant

• For increased stability, the coolant channels of the TDD10 * are smaller than on typical WIDIA ™ drills.

• Steady supply of coolant delivered to the cutting edges necessary. If coolant supply is not steady or is unequal through both channels, check:

— Coolant filtering system.— Sealing of adaptor / spindle.— Chips blocking the coolant hole on the drill shank.

• Make sure that the coolant supply reaches the cutting edge before drilling begins.

• Pressure by diameter: < 5mm 40 – 50 bar maximum; > 5mm 25 bar minimum.

MQL back end according to DIN 69090-3

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 applications with enlarged 90 ° chamfer instead of 40 °.

8) Shanks

• Other than normal SC Drills, TDD10 * series have a“ Z” shank, increasing with 1mm-steps.

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

• The clamping force is better with increasing diameter.

• If required, DIN-shanks( even, 2mm steps) are available as custom solutions.

Achieve the best tool performance with hydraulic chucks. widia. com

12mm hydraulic reducer sleeve

20mm hydraulic reducer sleeve

25mm hydraulic reducer sleeve

32mm hydraulic reducer sleeve

. 500 " hydraulic reducer sleeve

. 750 " hydraulic reducer sleeve

T117

KL-TECH s. r. o. | www. klte. cz