Rocky Mountain Twist Drill
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Rocky Mountain Twist manufactures premium high-speed steel (HSS) drills engineered for performance, consistency, and extended tool life.
With manufacturing rooted in Montana and vertical integration across design, heat treatment, and finishing, RMT drills are trusted for use in general machining, fabrication, construction, and MRO applications. Their product line includes jobber drills, mechanics-length drills, screw machine drills, and specialty geometry options for stainless steel, aluminum, and alloy materials. Factory Tooling Solutions provides local sales and technical support for Rocky Mountain Twist in Oklahoma, Arkansas, Iowa, Nebraska, Kansas, Missouri, Illinois, and Indiana—ensuring fast access to product knowledge, inventory options, and application guidance tailored to regional manufacturing needs. |
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Featured Products
Threaded Shank Drills
Secure, Precision Drilling Solutions
Rocky Mountain Twist’s Threaded Shank Drills are designed for secure, accurate drilling in aerospace, automotive, and precision manufacturing applications. Featuring a standard ¼-28 threaded shank configuration, these drills are engineered for use in portable drill motors and precision fixturing systems.
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Available in a range of diameters typically from #40 (0.098") up to 0.500", and in fractional, wire, letter, and metric sizes, RMT’s threaded drills ensure rigid, slip-free engagement, minimizing runout and improving hole position accuracy.
Manufactured from premium high-speed steel (HSS) or cobalt alloys depending on the series, and available with TiN or TiAlN coatings, these drills offer excellent wear resistance, thermal stability, and extended tool life in materials like titanium, stainless steel, and Inconel. |
- Read our article about this: Threaded Shank Drills from Rocky Mountain Twist – Secure, Precise, Repeatable
Micro Stop Countersinks
Controlled Depth, Perfect Finish
Rocky Mountain Twist’s Micro Stop Countersinks are precision depth-control tools engineered to create clean, accurately chamfered holes with repeatable depth settings. Designed for use with standard micro stop cages (aviation industry standard), RMT’s countersinks are manufactured from high-speed steel or cobalt, providing superior durability and consistent edge sharpness.
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Available in both single-flute and three-flute designs, these countersinks cover diameters from 0.090" to over 1.000" and are offered in common included angles such as 82°, 90°, and 100°.
Whether you're performing rivet hole preparation, deburring, or countersinking for aerospace fasteners, RMT’s Micro Stop Countersinks deliver chatter-free cutting action and precise depth control, resulting in high-quality surface finishes critical for structural applications. |
Cobalt Drills
High-Performance Drilling for Tough Materials
Rocky Mountain Twist’s Cobalt Drills are built for high-performance drilling in tough, heat-resistant materials such as stainless steels, tool steels, and high-temperature alloys. Made from M42 or M35 cobalt-rich high-speed steel, these drills offer increased hot hardness and wear resistance compared to conventional HSS drills, enabling higher cutting speeds and longer tool life.
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Available in jobber length, screw machine (stub) length, and aircraft extension series, RMT’s cobalt drills come in fractional, letter, wire, and metric sizes to suit a broad range of applications.
Standard options include 118° and 135° split point geometries for easier centering, reduced walking, and lower thrust requirements. Whether in aerospace assembly, maintenance operations, or general industrial manufacturing, RMT cobalt drills deliver reliable, repeatable drilling performance even in the most demanding materials. |
