Tool Coatings and Modifications

Rock River has been in business since 1986.

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.

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.

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.

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.

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

TiCN-Titanium Carbonitride

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