Tool Coatings and Modifications

Rock River has been in business since 1986.

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Optional Modifications

Solve Problems Economically —
  • 30% of standard tools ordered include one or more simple modifications.
  • Standard tool optional modifications eliminate need for costly special tools.
  • Optional modifications are available with very short lead times.
  • Improve standard cutting geometries for difficult machining materials-abrasive or extra tough.
  • Incorporates cutting form to eliminate need for additional machining.
  • Improve tool holding or driving.
 

Drill Optional Modifications

  • Intermediate cutting diameters to eliminate reaming operation.
  • Special point types and point angles:
    – 135º split point for drilling abrasive and tough materials
    – 90º point for drilling soft materials.
    – Double point angles to reduce drill breakout bur and reduce corner wear.
  • Coating to increase cutting speeds and feeds and reduce wear.
  • Flat or tang on shank for positive drive.
  • Short shanks to reduce run out due to set-up
  • Extra long shanks to solve reach problems.
  • Reduced shank diameter or undersized Morse taper to accommodate tool holding limitations.

 

Reamer Optional Modifications

  • Intermediate cutting diameters-priced on each reamer type data page.
  • Closer tolerances-instead of plus .0003
    For plus .0002 – add $1.00 per tool.
    For plus .0001 – add $3.00 per tool
  • Sharpen finish 30 micro inch or better.
  • End chamfer other than 45º.
    – Less than 45º tend to straighten hole
       31º to match 118º drill point at bottom of drilled hole.
       22-1/2º to match 135º drill point at bottom of drilled hole.
    – Greater than 45º tend to thin out chips that resist breaking.
    – Greater than 45º will produce better finishes and will follow drilled hole.
    – End Cutting – 180º chamfer (flat end-no chamfer)
  • Corner radius – for better finish.
    – for stronger corner in abrasive and tough materials.

 

  • Special O.D. relief depending on material being reamed.
  • Reduce circular margins for some steels.
  • Increase circular margins for some non-ferrous.
  • Grind steel head below carbide-usually .008-.020 to improve finish-normally much better to use full length carbide design.
  • “Rose” Grind – Twice the normal back taper and full circle on the margin (not relieved). To improve finish but this reduces tool life.
  • Cutting diameter partially reduced for non-cutting pilot.
  • Cutting diameter partially reduced for cutting step.
  • Coatings to increase cutting speeds and reduce wear.
  • Shortened shank reduces runout due to set-up.
  • Reduced shank diameter or undersize morse taper shank to accommodate tool holder limitations.
  • Flat or tang on shank for positive drive.

 

Counterbore Optional Modifications

  • Intermediate cutting diameter – priced on each counterbore type data page.
  • Closer tolerance than .001 on cutting diameter.
  • End chamfer other than 180º when used as a piloted countersink or hole bottom form operation.
  • Corner radius for improved finish.
  • Cutting diameter ground down for small cutting step.
  • Drive flat or tang on shank for positive drive.
  • Shortened shank reduces runout due to set-up.
  • Reduce shank diameter or undersize morse taper shank to accommodate tool holder limitations.

End Mill Optional Modifications

  • Intermediate decimal cutting diameter.
  • Closer tolerance.
  • Radius corners to improve finish.
  • Coating to increase cutting speeds and reduce wear.
  • Undersize shank to accommodate tool holding limitations.

Keyseat Cutter Optional Modifications

  • Intermediate width or diameters.
  • Radius corners to improve finish.
  • Reduce neck diameter.
  • Drive flats on shanks for positive drive.

Slitting Saw & Side Milling Cutter Optional Modifications

  • Closer tolerance for cutting face width and cutting diameter.
  • Alternate chamfer every other tooth.
  • Full radius.
  • Chamfer both sides.
  • Radius both sides.
  • Coatings to increase cutting speeds and reduce wear
  • Matched sets.

Rock River Tool Recommended Coatings

Cost Justified

  • Tool life dramatically extended.
  • Part finish significantly improved.
  • Reduced tool wear stabilizes tolerances.
  • Faster cutting speeds and feeds.
  • Utilize the physical deposition (PVD) process so the hardened tool steel body is not softened and retains its toughness.

TiN-Titanium Nitride

  • Most popular for steels and cast irons.
  • Hard – (86 Rc.)
  • Thermally stable to 1000º F.
  • Very good lubricity-0.4 coefficient.

TiCN-Titanium Carbonitride

  • Excellent for steel
  • Gaining market share.
  • Harder – (94 Rc) than TIN or TiAlN.
  • Only thermally stable to 750º F.
  • Better lubricity- 0.25 coefficient.

TiAlN-Titanium Aluminum Nitride

  • Excellent for aluminum, aluminum alloys, plastics, and titanium. (Not recommended for copper and brass).
  • Gaining market share rapidly.
  • Intermediate lubricity-0.3 coefficient.
  • Hard (89 Rc) – Best edge strength.
  • Lowest thermal conductivity.
  • Best thermal stability. (1350º F)

AITiN – Aluminum Titanium Nitride

  • Black in color.
  • Harder, smoother variation of TiAlN.
  • Created for abrasive and high temperature applications (> 800ºC).
  • Creates an aluminum oxide layer during the cutting process.
  • Popular for drilling, counterboring and milling.
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