Indexable drills are cutting tools used for drilling operations in machining. They consist of a drill body or holder that holds one or more indexable inserts or drill tips. These inserts can be easily replaced or indexed when they become dull or worn out, allowing for efficient tool changes and reduced downtime.
The main components of an indexable drill are:
Drill Body/Holder:
The drill body or holder provides the structural support and stability for the indexable inserts. It typically has flutes or channels for chip evacuation and may have coolant holes for effective lubrication and cooling during drilling.
Indexable Inserts:
The indexable inserts are the cutting elements of the drill. They are typically made from materials such as carbide, ceramic, or PCD (polycrystalline diamond). These inserts have multiple cutting edges, and when one edge becomes dull, they can be rotated or indexed to expose a fresh cutting edge.
The advantages of indexable drills include:
Cost Savings:
By using replaceable indexable inserts, the cost of tooling is reduced compared to solid drills since only the inserts need to be replaced, rather than the entire drill. This can result in significant cost savings over time, particularly in high-volume drilling operations.
Time Efficiency:
Indexable drills allow for quick and easy tool changes. When an insert becomes worn or damaged, it can be replaced or indexed without having to remove the entire drill from the machine, reducing downtime and increasing productivity.
Versatility:
Indexable drills are available in various sizes and configurations, allowing for a wide range of hole diameters and depths. They can be used for both roughing and finishing operations, providing versatility in drilling applications.
Chip Evacuation:
Many indexable drills have flute designs and chip breakers that facilitate efficient chip evacuation during drilling. This helps prevent chip clogging and promotes smoother drilling operations.
It is important to choose the appropriate indexable drill based on factors such as the material being drilled, the desired hole size, cutting conditions, and the specific requirements of the application. Manufacturers and suppliers can provide guidance on selecting the right indexable drill and inserts for your drilling needs.
