Milling · Turning - Komet Group

Internal Cutting Tools
Grinding Instructions
Boring and Facing Tool
The cutting edge overhang shown above runs through the
centre point of the boring head. However, the top rake which
is to be measured at right angles to the direction of the
cutting edge (dotted line), should be ground off obliquely
between 10° and 20° acc. to material.
Internal threading tool 55° or 60°
The cutting edge must always run to the centrepoint (see illustration)
or the angle will be distorted. When resharpening
threading tools, use front edge of chamfered grinding wheel.
Threading Tools
Form A
R.H. thread (standard), for
forward running, cutting
direction from tailstock to
headstock.
Form D
R.H. thread, for reverse running,
cutting direction from headstock
to tailstock.
Form 1
R.H. thread, cutting direction for
forward running from tailstock
to headstock.
KOMET Internal Threading Tools, HSS design in particular, are
also supplied for L.H. thread cutting. Please note the details
given below and state form required.
Please note:
When ordering Form D, the required form must be stated.
For acme threads, round threads and buttress threads, the
required pitch must also be stated, a special threading tool
also being required for each pitch size.
When ordering buttress threading tools, please state whether
thread is stressed at compression or tension.
Forms 1 and 2 can also be produced as L.H. threading tools
with cutting direction from headstock to tailstock for forwards
operation.
A separate blade is required for each pitch for form threading
tools.
Round Edison threads are three different thread types. For
buttress saw threading tools, please state whether the thread
is stressed for compression or tension.
Form 2
R.H. thread, cutting direction for
forward running from tailstock
to headstock.
Form 5
Compression
Form 6
Tension
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