Standard 90° Right Angle Head (DK90-BT40 ER Series)

Key Technical Features and Material Standards

• High-Rigidity Monoblock Casing (QT500-7 Ductile Iron): The body shell of the BT40 ER series is cast from premium QT500-7 Ductile Cast Iron. After undergoing artificial aging and stress-relief heat treatment, the monoblock casting exhibits superior damping capacity, exceptional torsional rigidity, and minimized thermal expansion under heavy loads.
• Gleason Ground Spiral Bevel Gears: The drive system features Gleason ground spiral bevel gears manufactured from 20CrMnTi Alloy Steel. Carburized, quenched, and ground to ISO Grade 4 precision, the gear set guarantees a transmission backlash ≤ 15 arcmin and running noise ≤ 70 dB under maximum RPM.
• Preloaded Spindle Bearings: The output spindle is supported by high-load, preloaded angular contact ball bearings (P4 grade from NSK/FAG), calculated to handle combined heavy radial cutting forces and axial thrust forces.

2D/3D Technical Drawings and CAD Download Center

Technical Specifications

Quality Assurance and Testing Standards

Before packaging, every single DK90-BT40 ER series angle head is subjected to a 100% Quality Inspection Protocol at our manufacturing facility:

• Static and Dynamic Runout Test: The maximum allowable runout of the spindle taper is checked with a high-precision dial indicator. It is limited to ≤ 0.005 mm at the spindle nose and ≤ 0.015 mm at 4D distance.
• 60-Minute Continuous Run-In: Each unit runs at its rated speed for 1 hour. The housing temperature rise must remain ≤ 25°C above ambient temperature to guarantee no gear misalignments or lubricant breakdown.
• Anti-Backlash Calibration: Verified with angular encoders to keep the backlash at or below 15 arcminutes.

Target Industries and Industrial Applications

• Automotive Powertrain and Casings: Ideal for machining complex internal surfaces and lateral mounting faces on lightweight aluminum/alloy engine blocks, cylinder heads, and transmission casings.
• Large Die and Mold Manufacturing: Used for finish milling on slider tracks, side walls, and deep ejector-pin angled holes in hardened steel mold bases.
• Aerospace Structural Frames: Used for side slot milling on lightweight, high-strength structural profiles made of aerospace-grade aluminum or titanium components.

CNC Machine Compatibility

Optimized for medium-to-large Vertical Machining Centers (VMC) and Horizontal Machining Centers (HMC). Compatible spindle shanks include:

• Spindle Standards: BT40 / BBT40 / SK40 / HSK63A.
• Typical Machine Brands: Compatible with Haas, Mazak, Okuma, Doosan / DN Solutions, and Hurco.

B2B Industrial Packing and Shipping Standards

• Anti-Rust Protection: Coated with high-performance anti-rust oil and vacuum-sealed in a heavy-duty VCI (Vapor Corrosion Inhibitor) bag with moisture desiccant packs.
• Shock Absorption: Nestled inside custom-contoured, high-density polyurethane protective foam blocks to prevent shifting or drop impact during courier transport.
• Heavy-Duty Outer Casing: Due to the net weight, each unit is securely crated in an ISPM 15-compliant, Fumigation-Free Plywood Wooden Case equipped with quick-locking metal clasps.
• HS Code: 8466.10.10.00 or 8466.30.00.90.
• Lead Time: Standard models are shipped within 5-7 working days. Custom positioning blocks are completed and shipped within 15-20 working days.
• Shipment Ports: Shanghai / Ningbo / Shenzhen Port, China.
• Incoterms Supported: FOB, CIF, EXW, FCA, DDU, DDP.
• Express Delivery: Shipped via international couriers with delivery to Europe and North America within 3-5 business days.

Technical Setup and Stop Block Alignment Guide

codeText

       ┌──────────────────────────────────────┐
       │     MACHINE TOOL SPINDLE FACE        │
       └──────────────────┬───────────────────┘
                          │ (Spindle Centerline)
                          │ 
                          ▼◄──────  G  ──────►[STOP BLOCK]
                       ┌─────┐                    │
                       │Taper│                    │ (Locking Bore)
                       └─────┘                    ▼
                          │               ┌───────────────┐
                     ┌────┴────┐          │ Positioning   │
                     │  Body   ├──────────┤ Pin (D18/D20) │
                     │  Casing │          └───────────────┘
                     └─────────┘

1. Stop Block Mounting: Securely bolt the heavy-duty stop block (retaining block) to the front face of the VMC machine spindle.
2. Verify Center Distance (G-Dimension): Confirm that the center-to-center distance between your machine spindle and the positioning pin socket corresponds precisely to your ordered G-Distance.
3. Indicate Side Runout: Chuck a ground test arbor into the ER collet. Sweeping a dial indicator along the arbor horizontally, adjust the stop block’s locking bolts until the parallelism is aligned within 0.015 mm per 100mm.
4. Confirm ATC Clearances: Run a slow-speed manual tool changer (ATC) test cycle to ensure the automatic arm smoothly grabs, inserts, and releases the BT40 taper without physical interference.

Technical FAQ