Work Piece
All Applications |
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- What are the size and depth
of the hole?
- Will it be a through or blind
hole?
- Is the hole drilled to the correct
size?
- Is the work piece rigidly held
against rotation and upward movement?
- If tapping a bottom-hole, does
drilled depth allow for chamfer teeth of tap and
sufficient clearance to keep tap from bottoming
out in hole?
- What is material and hardness
of the work piece?
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Tap
All Applications |
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- Do you have the correct tap
design for the application?
- What are the tap sizes and styles?
- What material is the tap made
from?
- Is the tap sharp?
- Is the tap properly aligned
with the drilled hole?
- Is there sufficient clearance
between the tap and the hole to allow for retraction?
- Who is tap manufacturer? What
speed do they recommend for optimum performance
of their tap in this material?
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Machine Tool
Manual Applications |
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- Is machine stop set so the
tap releases in neutral to prevent bottoming?
- Is the machine retraction correct
for tapping attachment being used?
- Is the torque control set to
prevent tap breakage?
- Is depth control set to correspond
with machine stop to provide the total thread depth
required and prevent bottoming?
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| CNC Applications |
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- What type of machine is in
use?
- What is the horsepower?
- What is the spindle taper?
- What is the method of fixturing?
- Are machine feed and speed
set correctly?
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| All Applications |
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- Is the proper cutting fluid
or lubricant being used for lubricating the tap?
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Tapping Attachment
All Applications |
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- Is the correct Tapmatic tapping
attachment being used for the specific job requirements?
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| CNC Applications |
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- Is the machine retraction
correct for the tapping attachment being used?
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Tapping Head Installation
and Machine Set Up
All Applications |
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- Never perform any installation
or programming, before reading the operator
instructions accompanying the tapping attachment
and the machine as well as the tap manufacturers'
recommendations.
- With a self-reversing tap chuck
for manual or CNC operations, it is important to
make sure that stop arm is strong enough to prevent
torque bar from bending or deflecting. Machine
torque bar must be stronger than largest tap.
- Is clearance between the drilled
hole and tap sufficient at start position to allow
the tap to clear the hole upon retraction?
- If a bottom hole is being
tapped is there sufficient chip clearance?
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| Manual Applications |
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- If torque control attachment
is being used, is torque set correctly so that
tap will not break if accidentally bottomed?
- If depth control feature is
employed, is it set correctly to cooperate with
machine stop, provide total thread depth required
and prevent engagement with bottom?
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| CNC Applications |
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- The machine retraction must
be correct for the tapping attachment being used.
- What is the feed rate?
- What is the actual tapping speed?
- What is the clearance plane
height?
- Is the potentiometer canceled?
- Be sure to follow programming
instructions for the tool.
- When
using a self-reversing head, has the ramp, dwell
or exact stop been disabled?
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