Каталог Iscar сверла со сменной режущей частью 2022 - страница 135

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  • DR-DH drills can be used with any type of adaptation. Double-ended Pad However, concentric adapters such as hydraulic chucks Worn support pads provide poor surface finish in a drilled are advantageous for better runout. When machining hole. In this case, pads should be rotated or replaced. high temperature alloys or applying very high machining loads, it is advisable to use strong gripping adapters Rotate when wear shows on the back side of the pad such as: side lock adapters, power / hydraulic chucks.
  • In case of chip formation or chip evacuation problems, the following sequence is recommended:

1 Reduce cutting speed by 10% 2 Increase internal coolant pressure 3 Apply a pecking cycle 4 Interrupted cut will have a direct influence on hole accuracy, quality and drill life. (Sometimes even tool breakage can occur).

DR-DH Machining Recommendations

ISO MaterialConditionTensile Strength Rm [N/mm2]Hardness HBMtl. No.Cutting Speed vc m/minFeed mm/rev
0.1 - 0.25 %CAnnealed42012511001500.10-0.25
0.25 - 0.25 %CAnnealed6501902-0.10-0.25
Non-alloy steel and cast steel, 0.25 - 0.25 %CQuenched and tempered85025030.15-0.30
free cutting steel 0.55 - 0.80 %CAnnealed7502204801500.15-0.30
P 0.55 - 0.80 %CQuenched and tempered10003005-0.15-0.30
Annealed60020060.15-0.30
Low alloy and cast steel (less93027570.15-0.30
than 5% of alloying elements)Quenched and temered1000300870-1200.15-0.30
p120035090.15-0.30
Annealed6802001080-1500.10-0.25
High alloyed steel, cast steel and tool steelQuenched and tempered11003251170-1200.10-0.25
Ferritic / pearlitic180150.18-0.35
Grey cast iron (GG)Pearlitic / martensitic26016180-3000.18-0.35
K Nl i GGGFerritic160170.15-0.30
oduar cast ron ()Pearlitic250181502500.15-0.30
Ferritic13019-0.15-0.35
Malleable cast ironPearlitic230200.15-0.35