Heavy-Duty 90° Right Angle Head (DK90-BT50 ER Series)

Key Technical Features and Material Standards

• Heavy-Wall QT500-7 Ductile Iron Casing: The outer housing is cast from high-grade QT500-7 Ductile Cast Iron. Treated with artificial aging and stress-relief annealing, the heavy-wall casting absorbs cutting vibrations during heavy feeds and maintains dimensional stability under continuous thermal loads.
• Gleason Precision Ground Gears: Features Gleason ground spiral bevel gears manufactured from 20CrMnTi Alloy Steel. Carburized and quenched to a surface hardness of HRC 58-62 and ground to ISO Grade 4 precision, the drive system maintains transmission backlash ≤ 15 arcmin and noise levels ≤ 70 dB under full load.
• High-Capacity Preloaded Bearing Assembly: The spindle is supported by preloaded, high-load P4 class angular contact ball bearings (NSK/FAG), arranged to absorb severe axial thrust and radial cutting forces encountered during heavy side milling.

2D/3D Technical Drawings and CAD Download Center

Technical Specifications

Quality Assurance and Testing Standards

Before packaging, every DK90-BT50 ER series angle head undergoes a 100% Quality Inspection Protocol:

• Static and Dynamic Runout Test: The maximum allowable runout of the spindle taper is checked with a high-precision dial indicator. It is strictly limited to ≤ 0.005 mm at the spindle mouth and ≤ 0.015 mm at 4D distance.
• 60-Minute Continuous Run-In: Each unit is tested at full rated operational speed for 60 minutes. Housing temperature rise must remain ≤ 25°C above ambient temperature.
• Anti-Backlash Calibration: Angular encoders are used to confirm transmission backlash remains ≤ 15 arcminutes under rated loads.

Target Industries and Industrial Applications

• Heavy Machinery and Energy Equipment: Machining internal features, side flanges, and mounting holes on large wind turbine housings, gearbox casings, and pump housings.
• Heavy Die and Mold Manufacturing: Roughing and finishing deep cavities, slider guides, and angled ejector pin channels in large forged steel mold blocks (S45C, H13, NAK80).
• Aerospace and Defense Structural Parts: High-feed side milling and drilling on large structural frames made of aerospace-grade aluminum alloys or titanium forgings.

CNC Machine Compatibility

Designed for large Vertical Machining Centers (VMC), Horizontal Machining Centers (HMC), and Gantry Milling Machines. Compatible spindle shanks include:

• Spindle Standards: BT50 / BBT50 (Double Contact) / SK50 / CAT50 / HSK100A.
• Typical Machine Brands: Compatible with Mazak, Haas, Okuma, Doosan / DN Solutions, Makino, and JTEKT / Toyoda 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 designed to isolate the heavy BT50 taper and housing from transport shock.
• Export Outer Casing: Due to the heavy unit weight (up to 17.454 kg), each unit is packed in an ISPM 15-compliant, Fumigation-Free Plywood Wooden Case with reinforced metal edge locks.
• 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 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 freight or ocean LCL/FCL containers depending on weight requirements.

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 to the front face of the VMC or HMC 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 80mm, 110mm, or 135mm on BT50 machines).
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 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 BT50 taper without physical interference.

Technical FAQ