Tool Resource / Category name

Hi Tim

It depends on the amount of work you are doing, material etc...

• If you are doing a range of diameters close to one another i'd suggest the Allied Maxcut style of drill where one body can do a range of sizes (limited by the body size).  You can also have flat bottom inserts and vary the material of the insert itself HSCO in preference to Carbide etc...
• If you are doing large diameters 20mm+ but more holes of a specific size i'd suggest a Sandvik 880 drill.  The productivity will show substantial improvements over most other brands.
• If you are doing one size of hole 20mm and below i'd recommend the Dormer Hydra Drill.  It's uses a solid carbide drilling head, which can be replaced without removing the tool from the machine and have impressive cutting data as this video illustrates.

Material Type: Alloy Steel, Hardened and tempered steel (AMG 1.5)

Tool Diameter: 20.0 mm

Hole Depth: 52 mm (2 inch)

Cutting Speed: 70 m/min (230 feet/min)

Revolutions: 1,115 rpm

Feed: 0.24 mm/rev (0.0094 inch/rev)

Table Feed: 268 mm/min (11 inch/min)