HRC60+ Hardened Steel
The Mold Master
Specialized for hardened steel and die components. AlTiN coating and a reinforced core hold the edge above HRC60 where others burn out.
Why QT Tools?
- Premium Chinese Carbide Rods
- ±0.005mm Tolerance
- Ships in 48 Hours
The Agony
Why Your Current Tools Are Costing You More Than Just Money
If you run a machine shop, you already know these headaches. We built QT Tools specifically to remove them.
Inconsistent Quality
Tired of the first batch being great and the second batch breaking? Most low-cost mills hide recycled carbide. The grain structure swings from lot to lot — so your tool life becomes a gamble you can't quote a job around.
Coating Peeling
Why do "premium" coatings fail after minutes? When pre-treatment is skipped, the coating never truly bonds. It peels, welds chips to the edge, ruins your finish, and wrecks your cycle time.
Supply Chain Lag
Why wait 8 weeks for big brands while your machines sit idle? Factory-direct supply means fast response and stable lead times — so your spindle keeps turning and your competitor doesn't ship first.
The Science · The QT Standard
German quality, engineered in China
We don't just sell tools — we manage every micron of precision. Here is exactly what goes into a QT Tools end mill.
Module A — The Substrate
Ultra-micro grain carbide rod
We grind only from ultra-micro grain carbide rods, with a grain size of just 0.2μm–0.4μm. Finer grain means a sharper, stronger edge that resists chipping under heavy radial load — so your tool life stops being a gamble.
- 0.2μm – 0.4μm ultra-micro grain
- Premium imported rods
- Higher transverse rupture strength
Module B — The Coating
Nano-composite coating, stable to 900°C
Our nano-composite AlTiN / TiSiN coating forms a protective oxide layer at high temperature, exactly when your tool needs it most. The result: no chip welding, a cleaner finish, and heat resistance up to 900°C in dry, high-speed cutting.
- Nano-composite AlTiN / TiSiN
- Heat resistant up to 900°C
- Anti-welding on hardened steel
Module C — The Geometry
Unequal pitch helix kills chatter
Our unequal pitch (variable helix angle) design breaks up harmonic vibration like a silencer — suppressing chatter at high spindle speeds, protecting your machine, and letting you push higher feeds with confidence.
- Unequal pitch / variable helix
- Vibration suppression at high RPM
- Mirror-quality surface finish
Module D — The Inspection
100% Zoller Precision Verification
We don't leave quality to chance. Every single QT Tools end mill undergoes a rigorous 100% inspection process using the German Zoller Genius 3 measuring center. Our production base operates strictly under ISO 9001:2015 standards to guarantee micron-level consistency in every batch.
- German Zoller Genius 3 technology
- ISO 9001:2015 Certified Quality System
- Micron-level edge & geometry control
The Solution
One series engineered for each job
No 500-page catalog to wade through. Pick your material, and we match you to the line built to dominate it.
3-Flute · Large Helix
The Aluminum King
3-flute large-helix design for fast chip evacuation and mirror-finish aluminum machining in 3C and consumer-electronics parts.
SUS304 / 316
The Stainless Specialist
Optimized geometry to overcome work hardening in SUS304/316. Tough edge prep keeps cutting where stainless usually grabs and tears.
Titanium · Inconel · Exotic Alloys
The Titanium Specialist
Optimized for titanium, Inconel and exotic alloys. Advanced heat-resistant coatings and a heavy-duty core survive the extreme temperatures these superalloys generate.
Ø from 0.04mm
Micro-Precision Series
Ultra-small diameters from 0.04mm to 1.0mm for medical, electronics and watchmaking components. Ground to ±0.001mm tolerance where every micron counts.
Fractional Sizes · 1/8" · 1/4"
Imperial / Inch Series
A full range of fractional inch sizes (1/8", 1/4" and up) built specifically for the North American market — no metric-to-inch guesswork.
Custom Solutions & OEM Available
We produce non-standard geometries and imperial sizes to your exact drawings. Send us a print — we'll engineer the tool.
Popular Sizes Quick Reference
Our fastest-moving standard geometries, in stock and ready to ship. Need a size or coating that isn't listed? We hold 5,000+ SKUs — just ask.
| Diameter | Flute | Coating | Application |
|---|---|---|---|
| Ø2 mm | 2-Flute | AlTiN (Ultra-Fine) | Micro slotting & fine detail |
| Ø4 mm | 4-Flute | nACo-Blue (Nano) | Hardened steel HRC55-65 |
| Ø6 mm | 3-Flute | DLC (Diamond-Like) | Aluminum & non-ferrous |
| Ø8 mm | 4-Flute | AlCrN (Nano-Composite) | Stainless SUS304 / 316 |
| Ø10 mm | 4-Flute | nACo-Blue (Nano) | Mold & die roughing |
| Ø12 mm | 4-Flute | AlCrN (Heat-Resistant) | Titanium & Inconel |
| Ø16 mm | 5-Flute | AlCrN (Nano-Composite) | High-feed finishing |
The Proof
Flank wear that tracks the A-brands
Milling P20 mold steel at HRC52, identical speeds and feeds. We measured how many parts each tool produced before reaching 0.2mm flank wear. QT Tools tracks right alongside the leading international brand — at a fraction of the cost.
“We don't just sell tools; we manage precision down to the micron.”
- 0.18mm
- Flank wear after 1,000 parts
- +162%
- Tool life vs. generic mills
- ≤ 2 wk
- Typical production lead time
Internal benchmark, P20 @ HRC52. Actual results vary by machine, setup, and parameters.
The Authority
We manage precision down to the micron
Switching suppliers is a real risk. Here is the hard proof that QT Tools is a genuine Chinese manufacturer with German-grade production — not a reseller.
Grinding floor · Changzhou, China
QC lab · Micron-level inspection100% Walter 5-axis grinding
Every tool is produced on Walter (Germany) 5-axis CNC grinding machines. You buy direct from the people who make the chips — not a trading desk reselling someone else's lots.
100% Zoller inspection
Every tool is verified on Zoller (Germany) measuring centers to micron tolerance. Diameter, runout, and edge prep are checked before it ever ships.
Exporting to 30+ countries
We supply mold makers and CNC shops across Europe, North America, and Southeast Asia, with full export documentation and stable QC.
Equipment & capabilities
- Walter (Germany) 5-axis CNC tool grinding
- Zoller (Germany) optical measurement & inspection reports
- PVD coating line — AlTiN / TiSiN / nACo
- Full material traceability per batch
Global Success Stories
Trusted by 500+ Machining Partners Worldwide
We switched our hardened-steel mold cavities from a premium German brand to QT Tools and cut our tooling spend by nearly 40% — with no measurable drop in surface finish. Same Zoller-verified precision, factory-direct pricing.
Carlos HerreraProduction Manager, Precision Mold & DieMonterrey, MexicoFor medical-device components the tolerance window is unforgiving. QT Tools holds ±0.005mm run-to-run, so our micro end mills stay predictable across the whole batch. Precision we can certify, delivered on a two-week lead time.
Anna KowalskiQuality Lead, Medical Device ManufacturingWrocław, PolandConsistent tool life is what won us over — well over 150% more parts per cutter than the generic mills we used before. The cost saving per part is real, and their engineers actually answer technical questions fast.
Nguyen Van MinhCNC Workshop Owner, Contract MachiningHo Chi Minh City, Vietnam
Ask the Engineers
Technical FAQ: Everything You Need to Know
Straight answers on precision, hardened-steel performance, cost, and lead times—written by the people who grind the tools.
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