Medical cutting tools
Implants and instruments are machined in stainless, titanium, and cobalt-chrome — with features measured in thousandths and finishes that can't be polished by hand. RobbJack's SS and SR miniature lines start at 0.005" cutting diameter and hold tolerances in microns, ground in the USA on the same machines as our production tooling.
The challenges — and how we cut them
1Features smaller than most shops can even measure
The SS (stub) and SR (reach) miniature series run from 0.005" cutting diameter with tolerances held in microns (0.000039"), with CVD diamond coating available for abrasive work — the same tooling used in medical, electronics, and MEMS work.
2Stainless and titanium implants work-harden and tear
Sharp, honed edges and steady feeds beat speed. SPS Super Python handles the aggressive roughing in stainless and titanium up to 40 HRc; XG variable-helix geometry controls chatter in the finish passes where surface integrity decides whether the implant passes inspection.
3Instrument slots and fine kerfs
RobbJack grinds 200,000+ standard slitting saw options — thin kerfs for instrument slotting with ultra-precision arbors (15× gripping force) that hold runout down where a wandering saw would scrap the part.
The medical toolset
SS / SR
Miniature End Mills
From 0.005" diameter, micron tolerances, CVD diamond option — stub and reach.
ExploreSPS
SPS Super Python
Stainless, titanium, and cobalt alloys to 40 HRc — variable helix, all center cutting.
ExploreSaws
Slitting Saws
200,000+ standard options for instrument slotting and fine kerfs.
ExploreThe proof — documented results
- 0.005"
- smallest cutting diameter — SS miniatures
- microns
- tolerance class on miniature tools
- 200,000+
- standard slitting saw options
Medical machining questions
How small do RobbJack end mills go?
The SS miniature series starts at 0.005" cutting diameter — with tolerances held in microns and a CVD diamond coating option. The SR series adds reach for deeper micro features.
What tooling works for titanium and cobalt-chrome implants?
Tough, sharp, variable-helix carbide: SPS for roughing, XG for finishing. Keep feeds steady so the alloy never work-hardens under a dwelling edge, and confirm your numbers on RobbJack's speeds & feeds calculator for the exact grade.
Can you make a custom micro tool for our instrument?
Yes — specials and altered standards are RobbJack's core business. Send the print through the special-tool quote and application engineering will spec the geometry and grade.
From the machining lab & case files
Put it on your machine
Send us your toughest medical part. Application engineering will spec the tool and the numbers — or quote a special from your print.