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Item # N/A Category Rail Drills

Trak-Star Twister Bits™ are the standard tooling for drilling all types of rail. They are available in two different styles: Carbide Tipped and Black Coated M42 HSS.
Twister Black Bits are re-sharpenable, made in the USA and feature a Titanium Aluminum Nitride coating for extended tool life when cutting rail (up to 400 BHN).
Carbide Twister Bits feature brazed in carbide tips and offer up to 2-1/2 times the tool life in both standard and extremely hard rail when used with the RB35.
The unique annular (hollow) design and thicker cutter wall offers extended tool life and extra durability.
Twister Bits feature the quarter-turn style mounting for quick and easy installation with no tools required. When used with a Trak-Star Rail Drill, installation is simple; insert the bit into the arbor, and give it a turn.
Twister Bits can also be used with similar rail drilling systems with a 3/4″ arbor bore. The shank of the bit features a flat that easily adapts to the set-screw style mounting, offering a secure installation, and allowing Trak-Star cutting technology to be used in multiple systems.
Multiple cutting edge design, along with proper coolant flow, produces a cool cut raising the rail temperature in the hole no more than 35°F above ambient temperature. This prevents work hardening, stress cracking, service failures, and repeated repairs.

Black TiAIN Item #	Carbide Item #	Cutter Size	Decimal Equivalent
15324	18-15224	3/4"	.7500
15328	18-15228	7/8"	.8750
15330	18-15230	15/16"	.9375
15332	18-15232	1"	1.0000
15334	18-15234	1-1/16"	1.0625
15336	18-15236	1-1/8"	1.1250
15338	18-15238	1-3/16"	1.3125
15340	18-15240	1-1/4"	1.2500
15342	18-15242	1-5/16"	1.3125
15344	18-15244	1-3/8"	1.3750
15346	18-15246	1-7/16"	1.4375
15348	18-15248	1-1/2"	1.5000
15352	18-15252	1-5/8"	1.6250
15354	18-15254	1-11/16"	1.6875

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