
our aerospace line is growing
For quotes or more information please contact us at (866) 433-4768 or sales@rockymountaintwist.com
Expanded Aerospace Line:
- Countersinks in HSS, M42, solid carbide & carbide tipped HSS removable pilot, carbide tipped removable pilot and M42 removable pilot
- Aircraft counterbores in HSS, M42, and carbide tipped
- Carbide tip rivet shavers
- Countersink pilots
- Reverse spotfacers and reverse countersinks in HSS, M42, carbide tipped and solid carbide
- Hollow cutters in HSS and M42
- 6" Arbor pilot for reverse spotfacer, countersinks
TRI-CAM microstop countersink
- Tri-cam design for true concentric fastener interface
- Precision, CNC diamond machined ensures exact specifications and consistency
- Premium M2 High Speed Tool Steel
- Premium M42 Cobalt HSS
- A countersink is used to cut and form a hole so that a flush fastener can be installed
- The main features of this countersink is the threaded shank, body cutting angle, and pilot


6" & 12" Aircraft extension
- One piece construction for long lasting durability and strength
- 135° Split point is self centering to help reduce the thrust requirements
- Split point penetrates on contact and prevents "walking" of the bit
- Industrial-Grade NAS construction (HSS and Cobalt)
- Heavy duty jobber flute length drills that are used for drilling holes in hard to reach places
Double Margin Core
- Four equally spaced CNC ground flutes for rounder holes
- Heavy Duty core construction
- Industrial-Grade NAS construction (HSS and Cobalt)
- Pilot/Major O.D. combinations to suit customer needs
- Double margin drills have an additional margin ground behind the leading margin, providing twice the number of contact points
- The trailing margin burnishes the cavity, making a true hole and smoother finish, helping to provide a more concentric drilled hole
- A reamer finish can be achieved with double margin drills, eliminating a second operation


Threaded shank
- Constructed from Industrial-Grade NAS Steel
- Able to screw into a threaded adapter on a handheld drill to enable drilling in tight areas where standard bits that install in a chuck can't fit
- Commonly used for angle and offset drilling
- Split point penetrates on contact and prevents "walking" of the bit
- Very stub configurations available
- Built to NAS 965
Nutplate drills
- One piece construction
- Oversized cross-hole for easy removal
- Tempered shank prevents breakage
- Premium M42 Cobalt HSS
- These machine specific drills are used with nutplate jigs in order to produce a high volume of holes that are to size with consistent hole spacing
