4 Flute Coolant Through Step Drill for 304 316L Steel AlTiN Coated
Carbide Reamer with Internal Cooling Channels
Introduction:
Our premium 4-flute coolant-through step reamer is specifically engineered for high-performance machining of austenitic stainless steels (304/316L). Featuring advanced AlTiN coating and optimized internal coolant channels, this carbide tool delivers superior hole quality and extended
tool life in these notoriously gummy, work-hardening materials.
The unique step drill design combines drilling and reaming operations into one efficient
process, significantly reducing cycle times while maintaining IT6-IT7 grade tolerances. Ideal for medical, food processing, and marine applications where
304/316L stainless steels' corrosion resistance is critical.
Features:
1. Specialized Tool Geometry
4-flute design with 35° helix angle for optimal chip evacuation
Polished flute surfaces prevent material adhesion in gummy steels
Step configuration enables combined roughing/finishing in one pass
2. Advanced Material Technology
Sub-micron tungsten carbide (0.5μm) for maximum edge stability
AlTiN nano-coating with enhanced lubricity for stainless steels
Through-tool coolant (2-4 ports) for effective heat management
3. Documented Performance Advantages
✓ 4× longer life vs standard HSS reamers in 316L
✓ Ra 0.8μm surface finish achievable
✓ 30% higher feed rates through optimized chip breakers
✓ Eliminates built-up edge (BUE) common with stainless
4. Customization Options
Diameter range: 3-20mm (0.118"-0.787")
Step configurations: 2-3 steps per tool
Shank options: Straight, Weldon, hydraulic
Special features: Left-hand spiral, reduced neck
Applications:
Medical Device Manufacturing
Food Processing Equipment
Marine & Chemical Systems
General Precision Engineering
Detailed Pictures:
Our workshop:
Promotion policy:
To help you experience our premium products, we’re excited to offer
the following exclusive promotions for first-time buyers:
1.Free Test Samples
Get free samples (total value ≤ $20 USD) when you cover the international shipping cost.
Perfect for evaluating our product quality and performance
risk-free.
2.$50 USD Discount on First Order
New customers can enjoy a $50 discount on the first order of $500 or more.
A great way to start our partnership with extra value!
Other products:
FAQ:
1. Are you a manufacturer or trading company?
We are a professional manufacturer of carbide tools which
established in 2017.
2. Which CNC grinding machine do you use?
All of our carbide tools are produced by imported WALTER grinding machines.
3. Which shipping method do you usually use?
We usually send goods by express like FedEx, UPS, DHL, TNT, EMS,
ETC.
We also can send products to your shipping agent in China.
