Consolidated Toledo Drill
Since 1951, Consolidated Toledo Drill — presents our current tools in the product catalog in downloadable sections, along with troubleshooting of high speed steel drill bits and high speed steel taps, feed and speed for both drills and taps and drill bit terminology and information on our growing company.
Premium High Speed Steel
High speed steel (HSS) is a form of tool steel; high speed steel bits are hard, and much more resistant to heat than high carbon steel.
They can be used to drill metal, hardwood, and most other materials at greater cutting speeds than carbon steel bits, and have largely replaced carbon steels.
HSS Magnum™ Super Premium Drill Bits - Consolidated Toledo Drill a drill with its thin web will penetrate the work hardening stainless fast enough to continually cut beneath the chip which is hardening from deformation. This means the drill is cutting softer steel. The cobalt drill, with its thick web, cannot be fed at a fast enough rate to cut beneath the area which is hardening. As a result the cobalt drill is continually drilling into hardened steel.
Stainless Steel Work Hardening vs. Free Machining — Work hardening grades of stainless are the 300 series with the exception of 303, which is free machining. Free machining grades include the 400 series in addition to type 303. A quick way to identify work hardening vs free machining stainless is to observe the chip formation. Work hardening chips break up during the drilling process, while free machining chips are long and stringy.