Page 3 - Aerospace & Defense

DRILLS MANUFACTURED TO NATIONAL AEROSPACE STANDARDS (NAS)

INTRODUCTION

Dormer Pramet offer a comprehensive range of drills
specifically designed for the aircraft industry, provided under
the Precision Twist Drill (PTD) brand.

Available in different styles to meet a variety of applications,
all products within the program are designed and
manufactured to NAS specifications (907/965) as published
by AIA (Aerospace Industries Association of America).
A summary of these specifications is provided at the back of
this brochure.

MATERIAL SURFACE FINISH GEOMETRY A COMPLETE RANGE

• Manufactured from premium grades of HSS and HSS-E • Standard tempered blue finish reduces oxidisation • Manufactured to NAS specifications (907/965) • Metric 1.00mm to 13.00mm
materials and helps prevent built up edge in general drilling • Split point geometry (118° or 135°) ensures the drill will • Fractional 1/64inch to 11/16inch
• These substrates provide good hot hardness and applications begin cutting instantly, reducing the chance of the tool • Gauge N1 to N60
therefore good tool life when drilling in areas with • Bronze finish also prevents oxidisation and built up edge skidding and causing damage to the component
restricted access where coolant cannot always be applied whilst being an indicator for drills manufactured from a • The point geometry combined with the flute construction • Letter A to Z
• HSS and HSS-E materials are strong, but will flex under cobalt based material reduces the forces required to penetrate the workpiece
pressure which is advantageous when being used in whilst providing excellent cross sectional strength, both
hand-held applications
beneficial for hand-held applications

DRILL STYLES

STANDARD LENGTH TOOLS ADAPTED SCREW SHANK DRILLS LONG SERIES AIRCRAFT EXTENSION DRILLS

for general hand-held drilling applications for use in right-angle drilling heads for increased for drilling in difficult to reach areas
accuracy when operating in confined spaces
• available in 6 and 12 inch lengths
• 1/4-28 UNF Thread with 5/16AF Hex

2 3