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Deep hole drilling inserts and grades

High metal removal rates and accuracy are common requirements when selecting insert grades for deep hole machining applications. Find the right insert grade for your operations here.

GC4235

​This CVD-coated carbide grade has excellent edge line security and is recommended for roughing of steel, steel castings and ferritic stainless steel at high metal removal rates in unfavourable conditions such as interrupted cuts.​

Benefits and f​eatures​

  • Excellent edge line security
  • Good toughness and wear resistance
  • High metal removal rates

Deep hole machining product catalogue and application guide

Whether your machining system of choice is STS, ejector drills or gun drills, this application guide is full of useful information on deep hole machining.

Download here

Skiving and roller burnishing

Discover more about manufacturing hydraulic cylinders with the skiving and roller brushing method.

From gun barrels to landing gear

Read more about how to efficiently machine accurate holes in demanding components with the latest deep hole machining methods.

Avoiding vibration with a dampener

Find out more about the various ways to avoid vibration in your metal cutting operations with this damped tools application guide.

Find your grade

CoroDrill® 800.20 CoroDrill® 800.24 CoroDrill® 801 T-Max® 424.10 CoroDrill® 818 T-Max® 424.31
Steel PGC1025GC1025GC1025GC1025GC1025GC1025
Stainless steel MGC4235GC4235GC4235GC4235GC4235GC4235
Cast iron KGC1025GC1025GC1025GC1025GC1025GC1025
Non-ferrous metals NGC1025GC1025GC1025GC1025GC1025GC1025
HRSA and titanium SGC1115GC1115GC1115GC1115GC1115GC1115

GC1025

PVD-coated​​ grade perfect for ISO P, K, ​H and N materials and provides excellent wear resistance and toughness.

CoroDrill® 800 (.20 and .24): For both ejector drill and single tube system (STS).

CoroDrill® ​801: Process security and chip control in large hole diameters. (For assortment, click on tool of your choice. Then click on ”View product details” and the tab ”Matching inserts.”​)

See complete assortment

GC4235

CVD-coated carbide grade with excellent edge line security for roughing of steel and stainless steel under unfavourable conditions.

CoroDrill® 800 (.20 and .24): For both ejector drill and single tube system (STS).

CoroDrill® 801: Process security and chip control in large hole diameters.​ ​(For assortment, click on the tool of your choice. Then click on ”View product details” and the tab ”Matching inserts​.”​​)​

See complete assortment

GC1115

​First peripheral grade choice in HRSA applications with good to average conditions. Inveio™ technology provides a high level of wear resistance, making this the best peripheral grade choice in HRSA applications with good to average conditions.

CoroDrill® 818: Secure counter boring.

See complete assortment

Complementary grades

GC1525

PVD-coated cermet with good wear resistance and edge-line toughness for finishing and semi-finishing operations in low-carbon and low-allow steels.​ ​Only for skiving.

View complete ​assortment

GC1125

​This PVD-coated grade is an excellent all-round grade for ISO P, M, K and S. Speeds and feeds from low to medium.

View complete ​assortment

GC235

​Combines good wear resistance at low to moderate cutting speeds with excellent toughness​ (P25-P50).

View complete ​assortment

H13A

​Universal, tough, uncoated grade for low to moderate cutting speeds in ISO N material. Complementary for HRSA and titanium.

View complete ​assortment

P1

​First-choice grade for support pads with excellent wear resistance in ISO P (P15-P50) and ISO K applications (K15-K50).

View complete ​assortment

M1

First-choice grade for support pads with excellent wear resistance in ISO M and N applications.

View complete ​assortment

PM1

​First-choice for support pads for crater wear resistance in ISO S and titanium. Complementary for ISO P and M.

View complete ​assortment

Highlights

Avoid vibration in deep hole machining

Use dampeners to control vibration in ejector drills and single tube system (STS) for longer tool life and higher productivity.

Struggling to find the right tool?

Let CoroPlus™ ToolGuide help you get quick and accurate tool recommendations – on all your devices!

Ejector system

Learn more about this easy to apply and cost efficient operation in machines with a horizontal spindle.

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