Steep Taper
Large manual machines and CNC machines use toolholders that have been precisely
ground with a male taper that mates with the machine’s specifi c female taper.
There is also a way to secure the toolholder in place with a pull stud or a draw bar
thread. With CNC machines, the pull stud is more popular because it allows for
easier automatic tool changing.
A toolholder consists of fi ve basic components:
Pull Stud
Tapered Shank
Gripper groove: circular groove
Adapter
Opposed Slot
The standard defi nes six basic taper shank sizes including SK 30, SK 35,
SK 40, SK 45, SK 50, and SK 60.
The proper Taper Shank for the Type of Machine
ISO 60
ISO 50
ISO 40
ISO 30
Very large machines
Medium size machines
Small size machines
Very small machines
Coolant supply form AD/B
13 Toolholders form AD/B have internal coolant supply. To use form B (coolant
supply through the collar) the two headless screws must be removed and a
sealed pull stud must be inserted. To use form AD (central coolant supply)
the two headless screws must remain at the collar and a pull stud with drill
through must be inserted.
13. 29 KEMMLER
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Tapered shank