SWISS PRECISION - ROBOTICS & AUTOMATION

Micro Gear Cutting Tools for Robotics

DIAMETAL engineers and manufactures the precision cutting tools behind humanoid joints, collaborative arms, and surgical actuators.  From module 0.03, with resharpening support for the life of your part.
Robotics application gear cutting
OUR PARTNER
DIAMETAL ×

Two Swiss precision manufacturers.
One solution

Every micro gear on this AF160 is cut with DIAMETAL tooling.
Where Swiss cutting-edge design meet Swiss machine-building.

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Hobbing & power skiving to module 2
External and internal gearing on one machine - DIAMETAL solid-carbide hobs and DIAskiving cutters run natively on the AF160 platform.
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Built for the same tolerance class
Affolter's Swiss-made gear centers are engineered around the fine-pitch, sub-0.05mm accuracy DIAMETAL's tools are ground to.
AF160-2025-1920px

How we work

From your drawing to serial production

1

NDA & Brief

Share your geometry, material, tolerances, and volume requirements under NDA.

2

Feasibility study

DIAMETAL Application Center assesses process route, tool concept, and lead time.

3

Tool proposal

Detailed offer with tool design, delivery schedule, and resharpening plan.

4

Application Center

First-cut tests, parameter optimisation, and gear quality validation on your part.

5

Serial ramp-up

Ongoing supply with resharpening cycles, continuous improvement, and process support.

ONE TOOL PARTNER

Every gearbox type
in a robot

From head to fingertip. Diametal cuts the tools behind every joint.

Planetary

Planetary

Sun & planet pinions, DIAskiving for internal ring gears.

Strain Wave

Strain Wave

Special-profile tools for flexspline & circular-spline.

Cycloidal

Cycloidal

Disc cutters for cycloidal discs and pin rings.

Roller Screw

Roller Screw

Thread-milling for screws, rollers and nuts.

25 - 40
Reductors per humanoid
30%
Of robot cost is in the gears

Gear Cutting Tools

The complete micro gear tool range
from module 0.03

Fine-pitch hobs

Fine-pitch hobs

m 0.03 – 1 · involute & epicycloidal · NIHS, DIN, AGMA, ISO or to your drawing · roughing, finishing, skiving

Classical & multi-thread hobs

Classical & multi-thread hobs

m 0.03 – 2.5 for larger joint stages · straight or helical flutes · shifting for long tool life

Disc-type gear milling cutters

Disc-type gear milling cutters

m 0.03 – 2.5 · tooth-by-tooth cutting of all profile types · one-position (no shifting)

Fraise-mère arbrée

Fly cutters

m 0.03 – 1 · frontal & conical toothings, Breguet, sliding pinions · chamfer hobbing

Bevel & face gear hobs

Bevel & face gear hobs

m 0.03 – 1 · hobbing of bevel and face gears · standard or special profiles

Rack milling cutters

Rack milling cutters

m 0.03 – 2.5 · complete or segmented rack cutting · straight or helical flutes

Thread-milling & worm tools

Thread-milling & worm tools

Micro lead screws, worms and roller-screw components for linear actuators

Setting & chamfering tools

Setting & chamfering tools

Setting hobs for special profiles m 0.03 – 1 · cutting, chamfering, deburring in one set-up

Logarithmic relief on every tool: solid carbide, ground with logarithmic undercut - the exact tooth profile is guaranteed after every resharpening. Coatings matched to your gear material.
DIAskiving

Power skiving down to module 0.050

diaskiving_cutter

 

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Solution for micro gears
Internal, external and face gears, straight or helical - from module ≥ 0.050.
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No limitation in profile design
Standard basic profiles (DIN, AGMA, NIHS…) or special profiles - grooves, Harmonic-Drive-type flanks.
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Quality to DIN 1829
Executions topping / semi-topping / no-topping, cutting angles adapted to each material.
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Resharpenable and recoatable
With standard carbide blanks in stock for short lead times.
Why it matters for humanoid joints
The internal ring gears of miniature planetary joint stages are power-skived productively and precisely - no broaching, no EDM, series-capable.
Applications

Where DIAMETAL tools operate
inside robotic systems

Every joint, actuator, and transmission in a precision robotic system depends on gears machined to micron-level tolerances. DIAMETAL tools make that possible.
 
Humanoid Joint Actuators
Shoulder, hip, elbow, and wrist joints requiring high torque density in minimal volume. Cycloidal and planetary stages.
CycloidalPlanetarym 0.1 – 0.5
 
Dexterous Grippers
Finger joints and tendon-drive gear trains demanding zero-backlash, ultra-low noise, and extended fatigue life.
Zero-backlashm 0.03 – 0.15
 
Surgical & Medical Robots
Sterile, compact, and biocompatible gear systems for laparoscopic, orthopaedic, and ophthalmological instruments.
BiocompatibleTi / SS / PEEK
 
Collaborative Robot Arms
6-axis cobot joints with harmonic drive and spur gear stages. High-repeatability positioning over millions of cycles.
Harmonic driveSpur / Helical
 
Aerospace & Space Mechanisms
Reaction wheel drives, antenna positioning, and deployment mechanisms requiring certified materials and traceability.
Inconel / TiFull traceability
 
EV & Power Train Gearing
High-speed, high-efficiency gear stages for electric drives. Tight pitch deviation and surface finish for NVH reduction.
NVH optimisedHigh-volume