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CoroDrill® DS20

4–7×DC insert drill that offers reliability, predictability and outstanding penetration rates.

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
  • Low cutting forces


-L5S

  • Optimized insert for stack drilling applications
  • Low to medium feed
  • Low cutting forces
  • Recommended to be applied up to 5xD drill length

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 materials and titanium


H13A

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

Select peripheral insert geometry

-M7W

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


-L5W

  • First choice in long-chipping ISO P and ISO M materials
  • Low to medium feed
  • Low cutting forces


-S5W

  • First choice in titanium and ISO N
  • Low feed
  • Sharp and extremely low cutting forces


-H5W

  • First choice for more challenging long-chipping ISO P and ISO M materials
  • Low to medium feed
  • Negative T-land
  • High cutting forces


-L6W

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

Select peripheral insert grade

GC4334

  • First-choice grade in ISO P and ISO K 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 ISO M materials 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

View more instructions

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 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

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

MDI

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

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 P1.1–1.2: -L5 1344
P1.3–1.5: -M7 1344		 P1.1: -H5W 4334
P1.2: -L5W 4334
P1.3–1.5: -M7W 4334		 -L5 1344 -L5W 4324
-L5W 4334
-L5W 4344
-H5W 4344
-M7W 4324
-M7W 4344
Low-alloy steel P -M7 1344 -M7W 4334 -M7 1344 -M7W 4324
-M7W 4344
Stainless steel M -L5 1144 -H5W 2044 -L5 1144 -L5W 2044
-L5W 4344
-H5W 4344
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 ✔ ✔ ✔


Insert seat, screw key information

Drill dimension, mm (inch) Insert size Screw size Screw article code (SCCOD) Keygrip TORXPLUS® Torque, Nm (lbf-ft) Bits TORXPLUS® Torque screwdriver for bits (adjustable torque) Torque screwdriver (preset torque) Fixed screwdriver
15.00–18.00 (0.591–0.708) 01 M2.0 5513 020-27 6IP 0.6 (0.44) 5680 084-17 5680 105-01 5680 100-01 5680 046-08
18.01–22.00 (0.709–0.866) 02 M2.2 5513 020-88 7IP 0.9 (0.66) 5680 084-18 5680 105-01 5680 100-02 5680 046-03
22.01–27.00 (0.867–1.06) 03 M2.5 5513 020-58 7IP 0.9 (0.66) 5680 084-18 5680 105-01 5680 100-02 5680 046-03
27.01–33.00 (1.06–1.30) 04 M3.0 5513 020-57 9IP 1.4 (1.03) 5680 084-20 5680 105-02 5680 100-04 5680 046-04
33.01–40.00 (1.30–1.57) 05 M3.5 416.1-833 10IP 2.0 (1.48) 5680 084-21 5680 105-02 5680 100-05 5680 046-05
40.01–52.00 (1.58–2.05) 06 M4.0 416.1-834 15IP 3.0 (2.21) 5680 084-15 5680 105-02 5680 100-06 5680 046-02
52.01–65.00 (2.05–2.56) 07 M4.0 416.1-834 15IP 3.0 (2.21) 5680 084-15 5680 105-02 5680 100-06 5680 046-02

Note:

  • It is recommended to use a torque screwdriver to avoid unexpected screw issues
  • Screws and bit provided in the toolbox
  • Bits TORXPLUS® to be used with adjustable torque


Apps

Start values

Start values

Start Values will give you recommended cutting data (speed, feed and depth of cut) for your machining operations.

Ifind

Ifind

The app will help you find tools, solutions or the information you need for your activities. You can get tool recommendations, you can make purchases, track your order, and even educate yourself. What do you want to do today?

Machining calculator

Machining calculator

The Machining Calculator App is designed to help engineers and machinists optimize the performance of their turning, milling and drilling applications by calculating optimal cut settings based on job parameters.


Highlights​

CoroDrill® DS20 demo

See the CoroDrill DS20 in action.

    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.

      CoroDrill® DS20 wallchart

      CoroDrill® DS20 wallchart

      Download the wallchart to get to most important CoroDrill® DS20 features at your fingertips.

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