Cutting Tool Technical Support

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

Causes

Solutions

Hole expansion

  • 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
  • Feed rate to high
  • Decrease feed rate
  • Not enough lubrication
  • Use drill with an oil hole

Problem

Causes

Solutions

Low position accuracy

  • 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
  • Low alignment accuracy (for lathing)
  • Check alignment

Problem

Causes

Solutions

Hole perpendicularity

  • Excessive tool wear
  • Regrind
  • Low position accuracy
  • 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
  • Increase 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
  • Regrind correctly
  • Low drill rigidity
  • Use carbide drill or larger web drills

Problem

Causes

Solutions

Poor surface finish

  • Poor regrinding
  • Take off all the wear
  • 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
  • Feed rate is too high
  • Reduce feed rate
  • Excessive tool wear
  • Build up on margin is too large
  • Regrind correctly
  • Select a coated tool
  • Chip packing
  • 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
  • Feed rate is too low
  • Increase the feed rate

Click here to Request a Quote or call us at 586-954-1900

sun hydraulics iso 9001 michigan manufacturers association global tooling alliance national fluid power association tooling, manufacturing, and technologies association