Slim 90° Right Angle Head (DK90-BT40 DC Collet Series)

Key Technical Features and Material Standards

• Ultra-Compact DC Pull-Back Collet System: Employs an internal draw-in DC collet mechanism that eliminates wide external clamping nuts. This slims the maximum head swing diameter down to D35 mm (DC6) and D40 mm (DC5M), providing clearance in narrow spaces.
• High-Rigidity Casing: Cast from high-strength structural material and treated with stress-relief heat treatment. The monoblock casting absorbs cutting vibration during deep-reach side milling while maintaining thermal stability under continuous operation.
• Gleason Ground Spiral Bevel Gears: Manufactured from 20CrMnTi Alloy Steel, gas-carburized and quenched to HRC 58-62, and ground to ISO Grade 4 precision on Gleason CNC grinders. Ensures transmission backlash ≤ 15 arcmin and running noise ≤ 70 dB under full operational load.
• P4 Class Preloaded Spindle Bearings: Supported by preloaded, high-precision P4 grade angular contact ball bearings (NSK/FAG), maintaining spindle nose runout ≤ 0.005 mm and rotational concentricity up to 6,000 RPM.

2D/3D Technical Drawings and CAD Download Center

BT40-DC6-66

BT40-DC7

BT40-DC8

BT40-DC10

Technical Specifications

Quality Assurance and Testing Standards

Before dispatch, every DK90-BT40 DC series angle head undergoes a 100% Quality Inspection Protocol:

• Static and Dynamic Runout Test: Spindle taper and DC collet cone runout are measured with a high-precision dial indicator, held to ≤ 0.005 mm at the spindle nose and ≤ 0.015 mm at 4D distance.
• 60-Minute Continuous Run-In: Tested continuously at rated operating speed for 60 minutes. Housing temperature rise must remain ≤ 25°C above ambient temperature.
• Anti-Backlash Calibration: Verified with angular encoders to confirm transmission backlash remains ≤ 15 arcminutes under rated load.

Target Industries and Industrial Applications

• Precision Mold and Die Cavities: Machining internal side-walls, slider tracks, and narrow ejector pin channels in hardened steel mold bases where standard nuts collide.
• Hydraulic and Pneumatic Valve Blocks: Finishing internal ring grooves, seal seats, and cross-drilled passages inside compact manifold enclosures.
• Automotive Transmission and Engine Housings: Side drilling, slotting, and thread milling inside deep internal bores of cast aluminum and iron housings.

CNC Machine Compatibility

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

• Spindle Standards: BT40 / BBT40 (Face & Taper double contact) / SK40 / HSK63A.
• Typical Machine Brands: Compatible with Haas, Mazak, Okuma, Doosan / DN Solutions, Makino, and Hurco machine tools.

B2B Industrial Packing and Shipping Standards

• Anti-Rust Protection: Coated with heavy-duty anti-rust oil and vacuum-sealed in a high-barrier VCI (Vapor Corrosion Inhibitor) bag accompanied by industrial desiccant packs.
• Shock Absorption: Cradled inside custom-contoured, high-density polyurethane protective foam inserts to isolate the BT40 taper and long housing from transport shock.
• Export Outer Casing: 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 (G-distance) are completed and shipped within 15-20 working days.
• Shipment Ports: Shanghai / Ningbo / Tianjin Port, China.
• Incoterms Supported: FOB, CIF, EXW, FCA, DDU, DDP.
• Express Delivery: Shipped via international air couriers (DHL, FedEx, UPS) 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 dedicated 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 the machine spindle and positioning pin socket matches your ordered G-Distance (commonly 65mm, 80mm, or 110mm).
3. Indicate Side Runout: Chuck a ground test arbor into the DC collet. Sweeping a dial indicator along the arbor horizontally, adjust the stop block’s locking bolts until parallelism is aligned within 0.015 mm per 100mm.
4. Confirm ATC Clearances: Run a manual tool changer (ATC) test cycle at low speed to verify the automatic arm smoothly grabs, seats, and releases the BT40 taper without physical interference.

Technical FAQ