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CoroDrill® DS20

Select central insert grade

GC1344
  • First choice for ISO P, K, S and H materials
  • PVD coated with Zertivo® technology
  • Excellent wear resistance and toughness

GC1144
  • First-choice PVD-coated grade for all types of ISO M and titanium materials

H13A
  • Universal, tough and uncoated grade for low to moderate cutting speeds in ISO N materials
  • Complementary grade for ISO S

Select peripheral insert grade

GC4334
  • First-choice grade in steel and cast iron applications with good to average conditions
  • Inveio® insert coating technology provides a high level of wear resistance

GC2044
  • PVD-oxide coated grade for excellent wear resistance in all types of stainless steels and titanium

GC4344
  • PVD-coated grade with Zertivo® technology for tough and demanding operations
  • Provides good edge-line properties and reliable tool life in average to difficult conditions

GC4324
  • MT-CVD coated grade with Inveio® technology
  • Productive choice in stable conditions

H13A
  • Universal, tough and uncoated grade for low to moderate cutting speeds in ISO N materials
  • Complementary grade for HRSA and titanium​

Select central insert geometry

-M7
  • First choice in short-chipping materials such as ISO P and ISO K
  • Low to high feed
  • Strong reinforced edge

-L5
  • First choice in long-chipping materials such as ISO P, M, S, N and H
  • Low to medium feed
  • Light cutting

Select peripheral insert geometry

-M7W
  • First choice in short-chipping materials such as ISO P and ISO K
  • Low to high feed
  • Strong reinforced edge

-L5W
  • First choice in long-chipping materials such as ISO P and ISO M
  • Low to medium feed
  • Light cutting

-S5W
  • First choice in titanium and ISO N
  • Low feed
  • Sharp and extremely light cutting

-H5W
  • Complementary geometry for long-chipping materials such as ISO P and ISO M
  • Low to medium feed
  • Negative T-land
  • High cutting forces

-L6W
  • All-round geometry for mixed production
  • First choice in Inconel and hardened steel
  • Low to medium feed
  • Light cutting

Drilling strategy for deep holes, 6–7×DC

Apply soft entries and exits to maintain the hole tolerance. All recommendations can be found in CoroPlus® ToolGuide.

  1. fn at hole entry: fn × 75%. Length of entry: 1 mm (0.039 inch)
  2. fn at continuous drilling
  3. fn at hole exit: 0.05 mm/rev (0.002 in/rev) or even lower if high demands on hole quality. Length of exit: 3–5 mm (0.118–0.196 inch)

No vc change in the different sections of the hole.

Tool holding

For best possible tool performance, use the high precision drilling interface MDI. The good centring capabilities enables good run-out precision, increased stability and optimal repeatability.

MDI assembly

  1. Remove the nut from the adaptor
  2. Place the slots of the drill where the pins are located on the adaptor
  3. Close the nut and tighten it correctly with a torque wrench

Application tips

Chip control

Chip formation and chip evacuation are critical issues in drilling and depend on many different factors. See our best tips on how to achieve good chip control.

Achieving good hole quality

Achieving good hole quality may require some extra attention. Here you can find some useful tips to get you started.

MDI

The position of the locating pins provides exact cutting edge position and a 180° rotation is possible. This can be beneficial in poor machine conditions, for example in misaligned or unstable lathes.

Advanced operations

Advanced operations such as inclined or curved hole entries, crossing holes and irregular surfaces require extra attention before machining. We have collected useful information to make advanced holes easy.

Recommendations

First choice grades and geometries

First choice Complementary choice
Central insert Peripheral insert Central insert Peripheral insert
Low-carbon steel P -L5 1344 -L5W 4334 -L5 1344 -L5W 4324
-L5W 4344
-H5W 4334
-H5W 4344
Low-alloy steel P -M7 1344 -M7W 4334 -M7 1344 -M7W 4324
-M7W 4344
Stainless steel M -L5 1144 -L5W 2044 -L5 1144 -L5W 4344
-H5W 4344
-H5W 2044
Cast Iron K -M7 1344 -M7W 4334 -M7 1344 -M7W 4324
-M7W 4344
Non-ferrous metal N -L5 H13A -S5W H13A -L5 1344 -L5W 4344
HRSA S -L5 1344 -L6W 4344 (Inconel)
-S5W 4344 (titanium)
-L5 H13A -L5W H13A
-S5W H13A
Hardened steels H -L5 1344 -L6W 4344 -M7 1344 -M7W 4344


Tool holder recommendations

MDI ISO 9766 adaptor Hydraulic chuck
(CoroChuck® 930)
Shank type MDI shank ISO shank Cylindrical shank
(only available as Tailor Made®)
Clamping option
Centring
Size of assortment
Surface quality
Length of assembly
Tightening torque


Apps



Highlights

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CoroDrill® DS20 demo

See the CoroDrill DS20 in action.

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MDI

Achieve more stable hole tolerances with the high-precision drilling interface MDI. One size can be used for several drill diameters which means less tool inventory and lower costs.

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