TAYLOR TOOL TAP TROUBLE SHOOTER

Thread Possible Causes Solution

produced is Incorrect tap, tap geometry not Apply correct tap material to be machined
too large suitable for the application Observe tapping size hole table in the
Tapping size hole is too small technical solutions. Note different tapping
size whole diameters for fluteless taps.

- Check for correct tool clamping

Alignment error of tapping size hole -Apply floating tap holder
or position - Check core drill

-Use mechanical feed

Machine spindle axially restricted - Apply tension/compression tap chuck
* Apply new tap
Cold welding at the flank of the tap
-

-Apply coated tap

-Optimize lubrication
Lead of tap unsatisfactory due to
- Tap with forced feed
insufficientthread depth
-Apply tap with modified lead
- Reduce cutting speed
Cutting speed too high - Improve lubrication
Ensure sufficient and suitable coolant supply
Lubrication or coolant supply
and check concentration
insufficient

Tolerance specification on tap does

Apply correct tap for required tolerances
not correspond to specifications on
Thread
drawing and/or thread gauge.
With spiral fluted taps only light pressure
axially
Spiral fluted taps, corresponding to required for initial tapping.
miscut our design are applied with too much The tap should immediately be applied
pressure for initial tapping within the tension/compression range.

Initial tapping pressure too low for Taps with spiral point or lefthand spiral
taps with spiral point corresponding require higher axial pressure.

to our form "E" Ensure tap operates with the

tension/compression range
Thread
*
Tolerance specifications on tap do not
produced is Apply correct tap forrequired tolerance
correspond to specifications on
too small drawing and/or thread gauge Apply correct tap for the material to be
machined
Incorrect tap
수 Tap does not cut accurately (thread Avoid strong axial forces during the cutting
plug gauge) process

Machine spindle is axially too rigid Apply tension/compression chuck

 Possible Causes Solution

Cutting edge geometry not Apply "correct" tap for the material to
Problem be machined
suitable for the application

→Cutting speed too high - reduce cutting speed

- optimize lubrication
Thread
Insufficient coolant Ensure suitable coolant and sufficient
surface not
(concentration and supply) volume
according to
Chip congestion Apply suitable tap type
requirements
Tapping size hole too small Observe tapping size hole diameter
specifications to DIN 336 or respective
standards. Observe table for fluteless
taps
수 With tough, hard materials
loading on tool too much or

pitch too steep Apply hand taps sets

Built up edge
Tool life Apply coated taps
Cold welding
insufficient Improve coolant supply
Surface hardening oftapping -check drill (cutting edge) for wear
size hole -Heat or surface treatment following
thread production

수 Reasons listed under "thread Reasons listed under thread surface

surface not according to "not according to requirements"

requirements"
Apply correct tap
→Chip congestion
Observe tapping size hole dia. Acс. Тo
Tool Tapping size hole too small
DIN 336 or respective standards
breakage -longer chamfer lead (blind or through hole)
of teeth of chamfer lead by
during Teeth of chamfer lead overload - increase no.

increasing no. of flutes

advance or
-apply tap sets
return Tap hits bottom of tapping size
hole -check hole depth
-apply tension/compression tap chuck

- Lack of or incorrect chamfer of - Correct chamfer angle of tapping size

hole
tapping size hole
-ensure correct tool clamping
Positional or angle error of tapping
-apply floating tap holder
-

size hole
-check core drill
- Tool hardness not suitable for the
application Apply suitable tap for individual
- Cutting edge geometry not suitable
application
for the application