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4 Flute Coolant Through Step Drill for 304 316L Steel AlTiN Coated Carbide Reamer with Internal Cooling Channels
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Carbide Drill Bit

Through Coolant Drill

Carbide Deep Hole Drill

Carbide Step Drill

Heavy Duty Drill Bit

Tungsten Carbide Tools

Carbide End Mill

Custom End Mill

Carbide Thread Milling Cutter

Solid Carbide Tap

PCD Milling Cutter

Carbide End Mill Cutter

Solid Carbide Reamer

Carbide Boring Tool
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4 Flute Coolant Through Step Drill for 304 316L Steel AlTiN Coated Carbide Reamer with Internal Cooling Channels

Brand Name: AMG
MOQ: 3-10PCS
Packaging Details: Plastic tube
Payment Terms: T/T/Credit Card
Detail Information
Product Description
Detail Information
Place of Origin:
CHINA
Certification:
ISO9001
Name:
4 Flute Coolant Through Step Reamer
Inch Or Millimeter:
All Can Be Customized
Type:
Inner Coolant Reamer
Diameter:
1-20mm
Overall Length:
50-330mm
Suitable For:
304 316L Steel
Supply Ability:
30000-100000pcs per month
Highlight:

4 Flute Step Drill

,

AlTiN Coated Step Drill

,

Carbide Reamer

Product Description
4 Flute Coolant Through Step Drill for 304 316L Steel AlTiN Coated Carbide Reamer
Attribute Value
Name 4 Flute Coolant Through Step Reamer
Inch Or Millimeter All can be customized
Type Inner coolant reamer
Diameter 1-20mm
Overall length 50-330mm
Suitable for 304 316L Steel
Premium Performance for Stainless Steel Machining

Our 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.

Key Features
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
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
Documented Performance Advantages
  • 4 × longer life vs standard HSS reamers in 316L
  • Ra 0.8 μm surface finish achievable
  • 30% higher feed rates through optimized chip breakers
  • Eliminates built-up edge (BUE) common with stainless
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
Industrial Applications
  • Medical Device Manufacturing: Surgical instrument precision holes, implant component through-holes
  • Food Processing Equipment: Valve body machining, mixing shaft bearing seats
  • Marine & Chemical Systems: Pump housing bores, heat exchanger tube plates
  • General Precision Engineering: Hydraulic component finishing, bearing housing precision bores
Product Images
4 Flute Coolant Through Step Drill for 304 316L Steel AlTiN Coated Carbide Reamer with Internal Cooling Channels 0 4 Flute Coolant Through Step Drill for 304 316L Steel AlTiN Coated Carbide Reamer with Internal Cooling Channels 1
Manufacturing Facility
4 Flute Coolant Through Step Drill for 304 316L Steel AlTiN Coated Carbide Reamer with Internal Cooling Channels 2 4 Flute Coolant Through Step Drill for 304 316L Steel AlTiN Coated Carbide Reamer with Internal Cooling Channels 3 4 Flute Coolant Through Step Drill for 304 316L Steel AlTiN Coated Carbide Reamer with Internal Cooling Channels 4
Special Offers for New Customers
  • 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.
  • $50 USD Discount: 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!
4 Flute Coolant Through Step Drill for 304 316L Steel AlTiN Coated Carbide Reamer with Internal Cooling Channels 5
Frequently Asked Questions
Are you a manufacturer or trading company?

We are a professional manufacturer of carbide tools which established in 2017.

Which CNC grinding machine do you use?

All of our carbide tools are produced by imported WALTER grinding machines.

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.

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