When machinists need to create internal threads, they opt for cutting taps. Cutting a tap means using tools that remove material from the tapped hole, according to North American Tool. This process then leaves an internal thread that meets the machinist’s desires.

Cuttapdrill size

Crownloc™ is a range of exchangeable tip drills designed to offer high quality holes at a lower cost. Matching the quality of high precision drills, Crownloc uses replaceable crowns to eliminate the need for and cost of regrinding. This guarantees consistently higher performance and tool life while also reducing the number of drills required in inventory.Crownloc features a unique clamping design with a precision-ground interface of interlocking V-grooves to allow high cutting speeds and ensure rigidity and exact repeatability of positioning of each crown. Long land margins provide excellent guidance to ensure high hole quality and self-centering geometry eliminates the need for center drilling operations.Double coolant holes through the crown permit a high volume of coolant to reach the cutting edges. The result is safer chip evacuation and longer tool life.Crownloc is available in a large range of optimized tip geometries for different applications and workpiece materials. The P geometry is recommended for drilling in steel and replaces the need for regrindable tools such as solid carbide drills and brazed drills. The K geometry is designed for cast iron and features chamfered corners to reduce wear at high cutting speeds and eliminate “break out” at the exit of a hole. The M geometry is designed for stainless steel, hardened steel and superalloys. It reduces stress in the machined surface and minimizes burr creation at the hole’s exit by minimizing cutting forces, high heat generation and workpiece hardening.Diameter range 10 - 25.99 mm (.393 - 1.023 inch).Other dimensions are available on request.

Cutting taps are more versatile than forming taps and can be used with more materials. When machinists use forming taps, they can only use the process on aluminum, soft steel and nonferrous metals. But machinists aren’t limited to the materials when they decide to cut taps.

Cuttap vsrolltap

Cutting taps also have the upperhand regarding horsepower, as this threading method requires less power than forming taps.

Double coolant holes through the crown permit a high volume of coolant to reach the cutting edges. The result is safer chip evacuation and longer tool life.

The two threading methods tap holes differently, but they also have a handful of other differences, starting with the type of thread each method produces.

Formtap

Crownloc is available in a large range of optimized tip geometries for different applications and workpiece materials. The P geometry is recommended for drilling in steel and replaces the need for regrindable tools such as solid carbide drills and brazed drills. The K geometry is designed for cast iron and features chamfered corners to reduce wear at high cutting speeds and eliminate “break out” at the exit of a hole. The M geometry is designed for stainless steel, hardened steel and superalloys. It reduces stress in the machined surface and minimizes burr creation at the hole’s exit by minimizing cutting forces, high heat generation and workpiece hardening.

Cutting taps and forming taps produce threads that are interchangeable and gauge identically, but those are the only similarities between the two tapping styles.

Formed threads are stronger because the grain flow of materials is compressed at the crest and root of the thread form. Compare that to cut threads, which because of the tools used, cause grain structure to essentially fracture.

Crownloc features a unique clamping design with a precision-ground interface of interlocking V-grooves to allow high cutting speeds and ensure rigidity and exact repeatability of positioning of each crown. Long land margins provide excellent guidance to ensure high hole quality and self-centering geometry eliminates the need for center drilling operations.

How are taper pipe taps identified

Cutting tap vs forming tap vsthread

Cutting taps and forming taps both have benefits and limitations from stronger threads to greater compatibility. But it’s the machinist who decides which tapping style to use depending on the job at hand.

Unlike cutting taps, forming taps create external threads. Forming taps involves the displacement of a material (like metal) within a hole. Additionally, forming taps usually require a larger hole because this style causes a material to thread away and into the threads of the tap.

Matching the quality of high precision drills, Crownloc uses replaceable crowns to eliminate the need for and cost of regrinding. This guarantees consistently higher performance and tool life while also reducing the number of drills required in inventory.

A machinist achieves that geometric precision by using tools that come with a feature called the chamfer, which cuts a 90-degree angle or edge to make it more symmetrical. This gradual cutting motion allows a tap to smoothly enter a hole.