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GM Series Micro Long Reach Carbide Flat End Mill

Ultra-precision D0.3-D0.9mm micro long reach flat end mills with TiSiN coating for deep cavity steel machining. Extended flute length (2-10mm) enables deep pocket milling in stainless steel, alloy steel ≤38HRC. 2-flute design ensures optimal chip evacuation in deep cavities.

D0.3mm - D0.9mm Diameter 2-Flute Long Reach TiSiN Coated Extended Flute 2-10mm ≤38 HRC
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GM Series Micro Long Reach Carbide Flat End Mill
GM Series Micro Long Reach Carbide Flat End Mill

Procurement & Commercial Terms for Micro Long Reach Tools

MOQ5 pcs (micro long reach minimum) | 50 pcs (bulk pricing)
Lead Time3–5 days (standard micro long reach) | 10–15 days (custom lengths)
InventoryD0.3mm–D0.9mm with various flute lengths in stock. Extended lengths require careful handling
Special HandlingIndividual protective tubes + anti-static packaging for micro long reach tools
Quality Guarantee100% inspection under microscope. Replacement for any deflection or precision defects
ShippingDHL/FedEx Express with tracking | Anti-vibration packaging mandatory

Why Choose GM Micro Long Reach Flat End Mills for Deep Cavity Steel Machining?

 
Extended Reach Capability

Flute lengths from 2mm to 10mm enable deep cavity and deep slot machining impossible with standard end mills. Ideal for deep micro mold cavities, deep pockets in steel components with superior rigidity.

 
TiSiN Heat Resistance

TiSiN coating provides superior heat resistance in deep cavity operations where heat concentration is critical. Prevents premature tool wear in micro long reach steel machining.

 
Deep Cavity Chip Evacuation

2-flute design provides maximum chip evacuation space in deep cavities. Prevents chip packing and breakage in stainless steel and alloy steel deep pocket milling.

 
Optimized Rigidity

Optimized core diameter maximizes tool rigidity at extended lengths. Reduces deflection and vibration in deep cavity steel machining for consistent precision.

GM Micro Long Reach Flat End Mill Specifications (D0.3-D0.9mm)

GM Micro Long Reach Flat End Mill Specifications (D0.3-D0.9mm)

ModelD (mm)H(h1+h2) (mm)d (mm)L (mm)Stock
GM-2FS-0.3-2-4-500.32(0.6+1.4)450● In Stock
GM-2FS-0.3-3-4-500.33(0.6+2.4)450● In Stock
GM-2FS-0.3-4-4-500.34(0.6+3.4)450● In Stock
GM-2FS-0.4-2-4-500.42(0.8+1.2)450● In Stock
GM-2FS-0.4-3-4-500.43(0.8+2.2)450● In Stock
GM-2FS-0.4-4-4-500.44(0.8+3.2)450● In Stock
GM-2FS-0.4-5-4-500.45(0.8+4.2)450● In Stock
GM-2FS-0.4-6-4-500.46(0.8+5.2)450● In Stock
GM-2FS-0.5-2-4-500.52(1+1)450● In Stock
GM-2FS-0.5-3-4-500.53(1+2)450● In Stock
GM-2FS-0.5-4-4-500.54(1+3)450● In Stock
GM-2FS-0.5-6-4-500.56(1+5)450● In Stock
GM-2FS-0.5-8-4-500.58(1+7)450● In Stock
GM-2FS-0.5-10-4-500.510(1+9)450● In Stock
GM-2FS-0.6-2-4-500.62(1.2+0.8)450● In Stock
GM-2FS-0.6-3-4-500.63(1.2+1.8)450● In Stock
GM-2FS-0.6-4-4-500.64(1.2+2.8)450● In Stock
GM-2FS-0.6-6-4-500.66(1.2+4.8)450● In Stock
GM-2FS-0.6-8-4-500.68(1.2+6.8)450● In Stock
GM-2FS-0.7-3-4-500.73(1.4+1.6)450● In Stock
GM-2FS-0.7-4-4-500.74(1.4+2.6)450● In Stock
GM-2FS-0.7-6-4-500.76(1.4+4.6)450● In Stock
GM-2FS-0.7-8-4-500.78(1.4+6.6)450● In Stock
GM-2FS-0.7-10-4-500.710(1.4+8.6)450● In Stock
GM-2FS-0.8-3-4-500.83(1.6+1.4)450● In Stock
GM-2FS-0.8-4-4-500.84(1.6+2.4)450● In Stock
GM-2FS-0.8-6-4-500.86(1.6+4.4)450● In Stock
GM-2FS-0.8-8-4-500.88(1.6+6.4)450● In Stock
GM-2FS-0.8-10-4-500.810(1.6+8.4)450● In Stock
GM-2FS-0.9-3-4-500.93(1.8+1.2)450● In Stock
GM-2FS-0.9-4-4-500.94(1.8+2.2)450● In Stock
GM-2FS-0.9-6-4-500.96(1.8+4.2)450● In Stock
GM-2FS-0.9-8-4-500.98(1.8+6.2)450● In Stock
GM-2FS-0.9-10-4-500.910(1.8+8.2)450● In Stock

All sizes in stock | Diameter tolerance: ±0.005mm | Runout: <0.005mm | Surface finish: Ra≤0.2μm | Custom flute lengths available upon request

Micro Long Reach Tool Handling: Extended flute lengths require rigid setup and reduced cutting parameters. Use precision collets (ER11/ER16), minimize overhang beyond flute length, and operate at recommended speeds to prevent deflection. Always use climb milling for deep cavity operations.

Material Compatibility for Micro Deep Cavity Steel Machining

Workpiece MaterialSuitabilityDeep Cavity Machining Notes
Stainless Steel (304, 316)◎ ExcellentTiSiN coating prevents work hardening in deep cavities. Use low speeds (15-35 m/min) with flood coolant
Alloy Steel (42CrMo, S45C)◎ ExcellentExcellent for pre-hardened steels ≤38HRC. Maintain constant chip load in deep pockets
Tool Steel (SKD11, SKD61)◎ ExcellentUse conservative parameters for deep cavity profiling. TiSiN provides heat resistance
Pre-hardened Steel (NAK80)◎ ExcellentIdeal for deep micro mold cavities. Use climb milling and peck drilling strategy
Carbon Steel (A36, 1045)◎ ExcellentGood machinability for deep features. Can use higher feeds than stainless
Aluminum / Copper✗ Not RecommendedUse ALC Series for non-ferrous deep cavities. GM Series optimized for steel

◎ = Excellent for Micro Deep Cavity Steel | ✗ = Not Recommended | GM Micro Long Reach Series is optimized for steel ≤40HRC. For aluminum or copper deep cavity machining, use our ALC Micro Long Reach Series.

Precision Deep Cavity Applications for GM Micro Long Reach Flat End Mills

Deep Micro Mold Cavities

Deep cavity profiling of micro mold cavities, inserts, and cores in pre-hardened steels. Extended flute length reaches deep features impossible with standard tools.

Medical Device Deep Pockets

Deep pocket milling of surgical instruments, implant components, and diagnostic device parts in stainless steel. ±0.005mm precision meets strict medical tolerances.

Deep Steel Features

Deep slotting, pocketing, and profiling in alloy steels and tool steels. 2-flute design ensures chip evacuation in deep cavity features.

Micro Deep Cavity Machining Parameters & Best Practices

Recommended Deep Cavity Parameters (Steel ≤40HRC)
  • ✅ D0.3-D0.5mm tools: Vc=15-25 m/min, fz=0.003-0.006 mm/tooth, Depth ≤0.015mm
  • ✅ D0.6-D0.7mm tools: Vc=20-30 m/min, fz=0.005-0.008 mm/tooth, Depth ≤0.02mm
  • ✅ D0.8-D0.9mm tools: Vc=25-35 m/min, fz=0.006-0.01 mm/tooth, Depth ≤0.025mm
  • ✅ Use peck drilling strategy for deep cavities - retract periodically for chip evacuation
Critical Deep Cavity Machining Tips
  • ⚠️ Use precision collets (ER11/ER16) with <0.003mm runout
  • ⚠️ Minimize overhang - keep tool stickout ≤3× diameter for rigidity
  • ⚠️ Climb milling only - reduces cutting forces and prevents deflection in deep cavities
  • ⚠️ Use compressed air or mist for chip evacuation - flood coolant may cause chip packing
  • ⚠️ Reduce feed rates for flute lengths >5× diameter to prevent breakage

Factory Production & Quality Control

Micro long reach carbide grinding and quality inspection line

Manufacturing Process & QA Steps

  • 🔹 Substrate: Ultra-fine grain carbide optimized for micro long reach rigidity and TiSiN coating adhesion
  • 🔹 Long Reach Grinding: 5-axis CNC micro grinding maintains diameter accuracy ±0.005mm and extended flute quality
  • 🔹 TiSiN Coating: PVD coating applied for heat resistance and wear resistance in deep cavity steel machining
  • 🔹 Inspection: 100% inspection under microscope. Diameter, runout, and coating thickness verified
  • 🔹 Packaging: Individual protective tubes with anti-static packaging for micro long reach tool protection

Frequently Asked Questions

GM Series micro long reach end mills feature extended flute lengths (2-10mm) for deep cavity and deep slot machining. The 2-flute design provides superior chip evacuation in deep pockets, while solid carbide construction maintains rigidity even at extended lengths.

Yes. GM Series micro long reach end mills with TiSiN coating are specifically designed for stainless steel, alloy steel and pre-hardened steels up to 38HRC. The coating provides heat resistance critical for deep cavity steel machining.

For micro long reach steel machining: Use Vc=15-35 m/min, fz=0.003-0.01 mm/tooth, depth of cut ≤0.02mm. Maintain rigid setup with runout <0.003mm. Use climb milling and minimize overhang to prevent deflection.

Use precision collets with <0.003mm runout, minimize tool overhang (≤3× diameter), use climb milling only, reduce feed rates for extended flute lengths, ensure rigid machine setup, and use peck drilling strategy for deep cavities. For flute lengths >5× diameter, reduce cutting parameters by 30-40%.

Request Quote for GM Series Micro Long Reach Carbide Flat End Mill

Specify your diameter range, material, and monthly volume. We respond with pricing, stock status within 24 hours.

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