Spiralock taps are furnished with ramp angles as shown here. This is referred to as style "BT" for bottom tapping. When tapping from the opposite end of a through hole, you must specify Spiralock style "TT" (top tapping), which has the ramp angle facing the opposite direction.
Designed for a wide variety of low-hardness materials that generate long chips. The spiral point pushes chips ahead of the tap in a through hole, while the spiral flute design provides good chip removal from a blind hole. Necked blanks allow better access for lubrication. These taps can be used for hand tapping.
T-10 Straight Flute
Specialized geometry for short-chipping materials such as cast iron and hardened alloy steels. The straight flutes do not provide chip transport, so these taps should not be used on deep blind holes unless tap is extracted mid-way to evacuate chips. TiN coating adds durability and lubricity. The T-10 tap range is intended for use on CNC machining centers.
Cold forming taps produce a thread by deforming material instead of removing it. The starting minor diameter is larger and must be held to a tighter tolerance than with standard taps to ensure the threads fill out properly. Forming taps are suitable for all ductile materials with an elongation value above 10%, such as aluminum, brass, copper, and mild steels. Lubrication with cutting oil is preferred.
An innovative line of cutting taps with cutting geometry tailored for cutting threads in traditionally difficult materials, including high nickel alloys and alloys of titanium. Every aspect of the tool is designed to provide good chip flow and to keep cutting edges sharp. Use of cutting oil for lubrication is essential.