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CoroDrill® 452

The hole

When hand drilling aerospace components the following characteristics are critical:

  • Hole diameter
  • Exit delamination or exit burr
  • Straightness
  • Perpendicularity

Aerospace fasteners typically require their own hole tolerance. These are different than universal IT standards. Be sure to ask what the hole tolerances are before starting a test.

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The component

To be successful you need to understand the entire application especially the component size, shape and material.

  • How is the component fixtured?
  • Machinability?
  • Material stacks?
  • Machine capabilities?

The machine

Hand drilling is unlike CNC, robotic and semiautomatic drilling in that the hole location, approach angle and feed are controlled by the operator.

Always consider

  • Air line pressure
  • Air volume at drill motor
  • Machine side clamping
  • Operator’s ergonomics


Coolant supply influences

  • Tool life
  • Hole quality
  • Chip evacuation

As portable hand motors do not have internal coolant, a lubrication paste is often used and recommended for stack with metallics. No lubricant is needed for CFRP only stacks.

Cutting data

Cutting data is the most significant impact on the machining outcome. Aerospace components often have multiple stack in one operation. Special consideration should be when selecting the correct parameters. Material with the highest hardness should set the parameters for the stack.

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The 452 drills and reamers should be used with teacup or jig bushings to help guide the location and straightness of the hole.

Our 452 countersink products must be used with a micro-stop common in the industry. These micro-stops control the countersink depth.

Application tips

Cutting data

CFRP - 60 smm (200 sfm) .08 mm/rev (.003 ipr)

Aluminium - 60 smm (200 sfm) .08 mm/rev (.003 ipr)

Titanium - 15 smm (50 sfm) .05 mm/rev (.002 ipr)

Stainless steel - 15 smm (50 sfm) .05 mm/rev (.002 ipr)

Learn more about reconditioning your older tools

Recondition your round tool up to 3 times for major cost savings with our reconditioning service.

Tailor Made

Sometimes that exact dimension you require might be missing. If so, simply turn to our Tailor Made service.

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