The portion following the thread portion. Shank is the portion which the chuck and holder grasp when they holInformationp.
The hole against which the tightening bolt strikes to fasten a die to its holder.
The hole where chips are stocked or are ejected.
A tap has cutting edges to cut threads. The chamfer is the cutting edges where the top of threads are ground off in an inclined manner. The inclination angle is called the chamfer angle.
A part following the shank is prepared in a square. When a tap is used by attached to machines, the square prevents the tap from turning.
At the face vertical to the axis, the cutting angle is the angle at which the cutting face of OD’s cutting edge crosses with its radial line.
Cutting face is flute face following chamfer and plays the role of main cutting. Chips run on this face.
Put on adjustable dies, slit is used to minutely adjust the screw threads.
A screw used to adjust the slit to adjust the screw threads.
Common name for the threaded portion. Thread portion is very important in specifying the accuracy of internal screw threads.
Relief is a relieved face prepared to avoid unnecessary contact to finished face. When the relief consists of plural faces, from the face near the cutting edges, they are called the first relief and the second relief respectively.
The inclination angle of relief face against the finished face.
The portion between thread portion and shank being applied by manufacturing reason or by using reason.
The portion connecting relief face with flutes.
At the face vertical to the axis, heel angle is the angle between a central line crossing heel anInformationngent line of chip hole face crossing the heel.
Distance between the top of thread and that of next thread
shape of a slit. Screw size is adjusted by either bolts or wedge.
Face connecting thread top with thread bottom. At cross section including the axis line, frank is generally straight.
Portion connecting with the cutting edge on land, and not having relief.
Flutes applied to eject chips. Depending on tap sizes and application, the number of the flutes will be 2 to 4.
Diameter of the imaginary cylinder or cone where the width of thread groove and that of thread become equal.
Portion having the shape like bank between the cutting edge and heel.
Width of the portion having the shape like bank between the cutting edge and heel.