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40Cr Alloy Steel Indexable Face Milling Cutter Body
This round indexable face mill cutter holder is precision CNC machined for CNC machining center plane roughing and finishing operations, equipped with multi-sided insert seats, clamping screw fixing holes, central spindle mounting bore and drive key positioning groove. It is the base carrier for carbide milling inserts, widely used in metal plate, mold blank and structural part surface milling.
- Material: 40Cr Alloy Steel
- Hardness: HRC 24–30 after tempering
- Tolerance: ±0.003 mm
- Surface Finish: Matte Black Anti-Wear Nitride Outer Surface + Precision Ground Inner Mounting Hole
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=Multi-Insert Face Milling Cutter Body Engineering
Uniform circumferential multi-station insert pockets are evenly distributed around the cutter body to realize multi-blade synchronous cutting, greatly improving milling processing efficiency. Each insert seat adopts accurate positioning step structure, matched with hexagon locking screws to firmly fix carbide inserts without shifting under high-speed cutting vibration. Central stepped mounting bore with drive key slot realizes precise clamping on machine tool spindle, ensuring high concentricity during high-speed rotation. Spiral chip grooves between each insert seat smoothly discharge cutting chips, avoiding chip accumulation scratch on machined workpiece surface. Integrated thick solid disc structure improves impact resistance, resisting bending and vibration deformation under heavy cutting load.
High Toughness 40Cr Alloy Steel Construction
40Cr alloy steel is the mainstream material for standard milling cutter bodies with balanced comprehensive performance:
- Moderate hardness and excellent impact toughness, not easy to crack under heavy cutting impact load
- Good cutting machinability for complex insert pockets, chip grooves and keyway integrated forming
- Stable dimensional consistency under long-term high-speed rotation temperature rise, no thermal deformation runout
- Gas nitriding surface treatment improves surface hardness and anti-rust performance, resisting cutting fluid corrosion Suitable for medium-load plane milling of steel, aluminum alloy, copper and cast iron workpieces in mold, automotive and mechanical processing industries.
Custom Milling Cutter Body Machining Support
- Custom outer diameter, number of insert stations, inner spindle hole size, insert pocket angle and chip groove depth based on customer CNC processing parameters
- Optional surface upgrades: Black Oxide Anti-Rust Coating, Hard Chrome Plating, DLC Anti-Friction Coating
- DFM cutting consultation: multi-blade balance optimization, chip removal groove flow design, heavy-load reinforcement structural design
- Fast single-piece prototype sampling and mass batch standard cutter body delivery
Key Features & Advantages
- Multi-Station Evenly Distributed Insert Seats: Multi-blade synchronous cutting greatly improves metal removal efficiency for plane machining.
- Step Positioning Insert Pocket + Screw Locking: Effectively prevents insert displacement during high-speed heavy cutting, guarantees processing dimensional stability.
- Smooth Spiral Chip Discharge Grooves: Rapidly discharge cutting chips to avoid workpiece surface scratch defects.
- Central Keyway Spindle Mounting Hole: High concentricity clamping reduces cutting vibration and surface roughness of finished parts.
- Nitrided Anti-Corrosion & Wear-Resistant Surface: Adapt to long-term contact with cutting fluid, extend cutter body service life.
Technical Specifications
| Parameter | Specification |
|---|---|
| Base Material | 40Cr Alloy Steel |
| Alternative Materials | 42CrMo Alloy Steel, Cr12MoV Wear-Resistant Steel |
| Hardness | HRC 24–30 (40Cr tempered); HRC 48–52 (post nitriding surface) |
| Dimensional Tolerance | ±0.003mm for inner mounting bore, insert pocket positioning surface & outer circular runout |
| Rotational Concentricity | ≤0.003mm at maximum outer diameter |
| Surface Roughness | Ra ≤1.6μm nitrided black outer surface; Ra ≤0.4μm ground inner mounting hole |
| Manufacturing Processes | 5-Axis CNC Milling, Precision Boring, Tempering Heat Treatment, Gas Nitriding, Deburring |
| Surface Treatments | Gas Nitriding, Black Oxide Anti-Rust Coating, Hard Chrome Plating |
| Customization | 100% Fully Customized via CAD Drawings & Cutting Process Requirements |
Applications
Mold Base Plane Milling
Multi-blade face milling cutter bodies for mold blank rough and finish plane processing, multi-station inserts improve mold opening efficiency, nitrided surface resists cutting fluid corrosion.
Automotive Structural Parts Machining
Large plane milling of automotive aluminum alloy brackets and steel chassis parts, high-toughness alloy steel cutter body withstands heavy-load high-speed cutting impact.
Aluminum Alloy Shell CNC Processing
High-efficiency face milling equipment for consumer electronic aluminum frame shells, smooth chip grooves avoid aluminum chip adhesion scratching workpiece appearance surface.
General Machinery Casting Parts Finishing
Cast iron, cast steel workpiece surface finishing milling cutter holders, stable rotation precision reduces product surface roughness.
Hardware Stamping Die Plane Processing
Roughing and semi-finishing face mill cutter bodies for stamping die steel plates, multi-blade synchronous cutting shortens single piece processing cycle.
