Tap Testing & Cut Testing
Stop guessing whether your spindle, holder, and tool can run harder. RobbJack measures your machine and validates the numbers — then hands your team a playbook to run them every time.
Optimized cutting parameters are tested, documented, and compiled to standardize your NC programming on a per-tool basis. The result enhances surface finish, reduces cycle times, and increases tool life on every assembly — using leading-edge techniques recognized by universities and major machine shops worldwide. It's one of the services run out of the RobbJack Machining Lab.
What it does for you
Eliminates chatter
Scientifically predicts the best spindle speeds, depths of cut, and feed rates for each tool assembly.
30% minimum productivity gain
Optimized, validated parameters that raise metal-removal rate while protecting tool life.
Ends the finger-pointing
Objectively identifies the weak link — tool, holder, spindle, fixture — instead of guessing.
Monitors spindle health
Tap testing a monument tool records your spindle's static frequency, so you can plan a replacement on your terms.
How it works
- 1
Scope
A meeting with RobbJack and your shop and NC-programming management defines the project, timeline, and deliverables — before any work at a machine.
- 2
Tap test
We measure your machine spindle's static frequency to find its stable speeds and depths.
- 3
Cut test
We validate the optimized parameters of each cutting-tool assembly with real cuts in a test plate.
- 4
Playbook
Your team receives a documented playbook of optimized, repeatable cutting parameters per tool.
What you'll need
- RobbJack cutting tools on site at your facility
- Assembled tool/holder assemblies balanced to G2.5 @ 33,000 RPM (TIR under .0005")
- A 2.0"-thick aluminum plate, securely fastened to the machine table for the cut test
- About 1 hour of machine time per cutting-tool assembly
- A dedicated, experienced machine operator for the duration of the event
- NC-programming support to create, modify, and post the cut-test programs
Ready to find the time hiding in your spindle?
Tell us the machines and parts you want to optimize, and we'll scope a tap- and cut-testing event with your team.