Cutting Tool Technical Support
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For technical support, please describe your question in detail and complete the "Have a Question" form to the right. An RTS Technical Support Associate will respond back to you as quickly as possible.
The chart provided below will assist you with some common problems that arise in hole making applications.
Technical support is being provided by RTS Cutting Tools for you, the machine tool operator, in order to assist and apply the correct tool for CNC machining centers. RTS has been successful in assisting many of our customer’s with their special drilling and reaming applications.
Twist Drill Troubleshooting Guide
Problem
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Causes
|
Solutions
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Hole expansion
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- Run out of drill when attached to the machine
- Loose hold
|
- Check holder and/or select another one
- Check run out after fixing to the chuck
|
- Non-symmetric point angle
- Different lip height
- Run out of chisel edge
|
- Regrind correctly
- Check preciseness after reground
|
Problem
|
Causes
|
Solutions
|
Irregular hole size
|
- Non-symmetric point angle
- Large lip height
- Run out of chisel edge
- Margin wear is large
|
- Regrind correctly
- Check precision after regrind
|
- Large run out after attached to the machine
- Loose hold
- Low work holding rigidity
|
- Check holder and select another one
- Check run out after fixing to the chuck
|
|
|
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- Use drill with an oil hole
|
Problem
|
Causes
|
Solutions
|
Low position accuracy
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- Large run out when attached to the machine
- Large spindle run out
|
- Check holder and/or select another one
- Check run out after fixing to the chuck
|
- Run out when cutting material
|
- Select more rigid tool and machine
- Increase work clamping rigidity
- Select a low cutting resistance thinning
- Use centering
- Work piece should be horizontal
- Use a drill bush
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- Low alignment accuracy (for lathing)
|
|
Problem
|
Causes
|
Solutions
|
Hole perpendicularity
|
|
|
|
- Increase position accuracy
|
- Non-symmetric point angle
- Large lip height
- Run out of chisel edge
|
- Regrind correctly
- Check precision after regrinding
|
- Not enough drill rigidity
|
|
- Drilling surface is not horizontal
- Poor alignment (for lathing)
|
- Work piece must be horizontal
- Make a center hole. Check alignment
|
Problem
|
Causes
|
Solutions
|
Bad cylindrical accuracy
|
- Non-symmetric point angle
- Large lip height
- Run out of chisel edge
|
- Regrind correctly
- Check precision after regrinding
|
- Large run out after attached to machine
- Loose hold
- Low work holding rigidity
|
- Check hole and/or select another one
- Check run out after fixing to the chuck
|
- Relief angle is too large
|
|
|
- Use carbide drill or larger web drills
|
Problem
|
Causes
|
Solutions
|
Poor surface finish
|
|
|
- Not suitable coolant for the material
- Not enough coolant
|
- Change supply method; increase volume
- Select higher coolant quality
|
- Large run out after attached to machine
- Loose hold
|
- Check holder and/or select another one
- Check run out after fixing to the chuck
|
|
|
- Excessive tool wear
- Build up on margin is too large
|
- Regrind correctly
- Select a coated tool
|
|
- Select suitable drill (wide flute, high helix oil hole drill). Change cutting conditions (feed rate or adopt step drilling)
|
Problem
|
Causes
|
Solutions
|
Bad cylindrical shape
|
- Non-symmetric point angle
- Large lip height
- Run out of chisel edge
- Large margin wear
|
- Regrind correctly
- Check precision after regrinding
|
|
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