ID Rough 

Counter Rotational Drilling
Best method for drilling long holes one end only (OEO).

 

Ejector Drilling

Used for smaller holes. It does not leave a core in trepanning. May be used for blind hole applications.

 

Trepanning

Removes a core out of the solid bar providing an excellent trade-off between cost and precision.

 

Full Bore Drilling

Offers a more precise hole than trepanning, but has higher tooling costs.

 

 

Drilling Capability Chart      

 

 

DRILLING

Length

From less than 1 ft (.3m) to greater than 54 ft (16m)

ID Tolerance

To +/-0.15 in (3.8mm)

ID RMS

To 125 RMS

ID Range

From less than 1 in (25mm) to greater than 8 in (203mm)

Drift

0.002 in/linear in