Milling Angle Head (DK90-BT40 W13 & YW16 Series)

The DK90-BT40 W13 & YW16 Series comprises high-rigidity 90-degree milling angle heads engineered for medium-to-heavy side milling, drilling, and tapping operations on BT40 vertical machining centers (VMC) and horizontal machining centers (HMC). Designed for high cutting torque and multi-face machining in a single clamping setup, these attachments eliminate workpiece repositioning errors and maximize spindle productivity.

Configured with high-precision collet spindles (ER20 for W13 and ER25 for YW16), this series handles tool shank diameters up to Ø16.0 mm and delivers maximum cutting torque up to 46.0 Nm at speeds up to 6,000 RPM.

Key Technical Features and Material Standards

High-Rigidity Casing Construction: Cast from high-strength alloy structural iron and treated with artificial aging and stress-relief heat treatment. The solid housing absorbs heavy cutting vibration during side milling, slotting, and thread processing.
Gleason Precision Ground Bevel Gears: Driven by Gleason ground spiral bevel gears in 20CrMnTi Alloy Steel. Carburized and quenched to HRC 58-62 and ground to ISO Grade 4 precision on Gleason CNC grinders, delivering 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 concentricity up to 6,000 RPM.
Modular ER Collet Output: Supports ER20 (clamping Ø1.0–Ø13.0 mm) and ER25 (clamping Ø1.0–Ø16.0 mm) precision collet systems, enabling rigid clamping of solid carbide end mills, drills, and taps.

2D/3D Technical Drawings and CAD Download Center

Technical Specifications

Model	Input Shank	Spindle Output	Max. Speed	Gear Ratio	Spindle Rotation	Passing Dia. (D)	Clamping Range	Tapping Capacity	Max. Torque	Net Weight	Stock Status
DK90-BT40-W13	BT40	ER20	6,000 RPM	1:1	CW-CW	D130 mm	Ø1.0 – Ø13.0 mm	M6 – M10	35.0 Nm	5.850 kg	Always in Stock
DK90-BT40-YW16	BT40	ER25	6,000 RPM	1:1	CW-CW	D118 mm	Ø1.0 – Ø16.0 mm	M6 – M14	46.0 Nm	6.900 kg	Always in Stock

Quality Assurance and Testing Standards

Before dispatch, every DK90-BT40 W13 & YW16 series angle head undergoes a 100% Quality Inspection Protocol:

Static and Dynamic Runout Test: Spindle taper and collet cone runout are measured with a high-precision dial indicator, strictly held to ≤ 0.005 mm at the spindle nose and ≤ 0.015 mm at 4D distance.
60-Minute Continuous Run-In: Tested continuously at 6,000 RPM 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

Automotive Powertrain & Casings: High-torque side milling, drilling, and M6-M14 thread tapping on aluminum and iron cylinder blocks, oil pans, and transmission covers.
Die and Mold Manufacturing: Heavy shoulder milling, pocketing, and deep slotting in hardened steel mold plates (S45C, H13, NAK80).
General Machinery & Hydraulic Manifolds: Precision lateral machining of valve ports, seal seats, and internal mounting faces on structural castings.

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 housing from transport shock.
Export Outer Casing: Packed 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 │          └───────────────┘
                     └─────────┘

Stop Block Mounting: Securely bolt the dedicated stop block (retaining block) to the front face of the VMC machine spindle.
Verify Center Distance (G-Dimension): Confirm that the center-to-center distance between your machine spindle and positioning pin socket matches your ordered G-Distance (commonly 65mm, 80mm, or 110mm).
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.
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

A: The DK90-BT40-W13 features an ER20 spindle output (clamping up to Ø13.0 mm, max torque 35.0 Nm, swing diameter D130 mm). The DK90-BT40-YW16 features a larger ER25 spindle output (clamping up to Ø16.0 mm, max torque 46.0 Nm, compact passing diameter D118 mm), providing higher cutting capacity for larger end mills and taps.

A: Yes. The DK90-BT40-YW16 supports rigid tapping up to M14 threads (and M10 on the W13 model). Ensure the machine CNC controller’s feed rate and rotational speed are synchronized during rigid tapping cycles.

A: No. Because stop block mounting coordinates vary across CNC machine builders (Haas, Mazak, Doosan, etc.), stop blocks are custom-machined to match your specific machine’s G-distance. Please submit our Technical Worksheet with your spindle face measurements when ordering.