CoroDrill® 870
CoroDrill® 870 exchangeable-tip drill saves time, increases productivity, and reduces cost per hole. Tailored to suit your needs, CoroDrill® 870 is designed to optimize applications through diameter range, steps and length possibilities for the H9-H10 hole tolerance area.
Optimized for long, predictable tool life and high productivity
The CoroDrill® 870 drill body is designed for high penetration rates and excellent hole quality. Chip flutes have optimized shape, size, and helix angle for safe chip evacuation and tool stability.
Grades have predictable wear patterns for long and reliable tool life at high productivity rates.
Geometries showcase high process security, good chip control, high penetration rates and premium hole quality.
Tailored for your needs
CoroDrill® 870 comes in an extensive standard offering. However, when standard isn't enough, both drill body and tips can be further optimized using Tailor Made or engineered solutions.
Among others, the Tailor Made options available include:
Easy handling and productive tip changes
The high-precision interface between drill body and tip provides accuracy, security and stability in drilling applications.
Designed for productivity, the interface allows for changing tips while remaining in the machine, reducing downtime.
Application area
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| Conventional drilling | Inclined exits | Inclined surfaces | Chamfered holes |
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| Cross holes | Stack drilling | Convex surfaces | Step holes |
- Diameter range: 10–33 mm (0.394–1.299 inch)
- Depth capacity: 3 × D–12 × D
- Hole tolerance: H9–H10
- Capable of being used in a variety of drilling applications
Product variants
-PM 4334
First choice in ISO P, N and titanium.
-PM 4334 is considered to be an all-round tip. Although primarily intended for low-alloyed and carbon steels, it also shows good functionality and tool life in austenitic stainless steels, as well as cast irons.
The grade used in -PM 4334 shows an excellent combination of wear resistance and toughness.
-MM 2334
First choice in ISO M and Inconel.
-MM 2334 shares a similar geometry as -PM 4234, but has a reinforced chisel edge, which improves tool life, especially for duplex stainless steels.
The grade used in -MM 2334 is optimized for edge line security and resistance to adhesive forces in ISO M.
-KM 3334
First choice in ISO K.
The geometry for -KM 3334 utilizes a corner chamfer, allowing for reduced exit breakouts in the workpiece material.
The grade used in -KM 3334 is highly wear-resistant, optimized for ISO K.
-GP 4334
Functional in all ISO materials.
-GP 4334 is intended for piloting applications. The geometry has a larger point angle and different tolerance class compared to the other -PM/-MM/-KM geometries.
Highlights
Watch the CoroDrill® 870 in action
This video shows the CoroDrill® 870 taking on a wheel hub. Both a rotating and non-rotating operation is shown along with a piloting strategy that combines a chamfer in order to reduce cycle time.
Increased productivity with CoroDrill 870
When Sweden-based Gunnebo Industries started using CoroDrill 870, it improved operator security and increased productivity by 45%.
Tailor Made
Machining a unique component and need a special drill to suit your application type? Tailor your tools to get the best machining results with our Tailor Made service.
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Sandvik Coromant US - Mebane, NC
+1-800-Sandvik