Offset 90° Right Angle Heads & Milling Attachments

Offset 90° Right Angle Heads & Milling Attachments

Welcome to the BOD Offset Angle Head Series, engineered to resolve critical clearance and spatial interference challenges on standard vertical and horizontal CNC machining centers. Designed by Beijing BOD Technology Co., Ltd., our offset angle heads—such as the high-rigidity DK90-BT40-W13—position the cutting spindle axis off-center relative to the main machine spindle. This mechanical offset provides necessary physical clearance, allowing the housing to bypass tall workpiece walls, complex clamping fixtures, and narrow cavities. This series enables manufacturing workshops to perform stable side milling, drilling, and tapping in recessed areas where inline right-angle heads would risk physical collision.

Strategic Spindle Offset for Complex Cavity Access and Fixture Clearance

The primary engineering value of the BOD Offset Angle Head Series lies in its structural spatial layout. By shifting the cutting spindle centerline away from the input spindle axis, the housing design provides a physical relief zone. This layout allows workshops to route cutting tools into tight, deep channels, internal box ribs, and high-sided pockets. Operators can complete side milling and drilling processes without colliding with surrounding table clamps, high part flanges, or fixture brackets, eliminating the need to design overly long, unstable custom tooling setups.

Robust Metallurgy and Vibration Damping Under High Radial Loads

To prevent structural deflection and ensure long-term stability during medium-to-heavy side milling, our offset heads are manufactured to strict metallurgical standards:

  • Monoblock Castings: Main bodies are cast from premium QT500-7 Ductile Cast Iron or high-rigidity aluminum alloys, depending on the model’s weight constraints.

  • Stress Relief: Each casting is stabilized using artificial aging and cryogenic stress-relief cycles to minimize internal material tension.

  • Torque Support: This rigid casing configuration absorbs cutting vibration and radial torque, maintaining precise geometric alignment under continuous lateral loading.

Gleason Ground Gearing and Reliable Spindle Performance Metrics

Our offset milling attachments incorporate high-quality transmission components to ensure smooth, efficient power transfer:

  • Gleason Spiral Bevel Gears: Built with Gleason ground spiral bevel gears in 20CrMnTi Alloy Steel, carburized and quenched to a surface hardness of HRC 58-62, and ground to ISO Grade 4 precision. Gearing backlash is held to ≤ 15 arcmin, and operating noise is limited to ≤ 70 dB.

  • Performance Specifications (DK90-BT40-W13): As a representative model, this unit features a 1:1 transmission ratio, operates at speeds up to 4,500 RPM, and delivers up to 35.0 Nm of cutting torque. It supports a clamping range of Ø1.0 mm to Ø13.0 mm, has a tapping range of M6 to M10, and maintains a manageable weight of 5.85 kg for compatibility with standard automatic tool changers.

FAQ

Frequently Asked Questions

Common questions about our products and services.

A: An offset angle head features a cutting spindle that is physically set back or shifted from the centerline of the machine spindle, whereas an inline model has its cutting spindle aligned directly under the machine spindle axis. You should choose an offset model when machining narrow slots, deep pockets, or features located very close to tall vertical ribs or work-holding clamps. The offset design provides critical spatial clearance, allowing the tool to reach into confined zones where a standard, wider inline housing would collide with the workpiece or fixtures.
A: The DK90-BT40-W13 offset milling head has a maximum spindle speed of 4,500 RPM and transmits up to 35.0 Nm of cutting torque with a 1:1 drive ratio. It accommodates a standard clamping range of Ø1.0 mm to Ø13.0 mm and is capable of tapping threads from M6 to M10. Weighing approximately 5.85 kg, it is structurally optimized to balance rigidity with standard automatic tool changer (ATC) payload limits.
A: Spindle runout and rotational accuracy are maintained by combining high-precision P4 class preloaded angular contact bearings with carburized HRC 58-62 Gleason ground spiral bevel gears. The rigid QT500-7 ductile iron casing provides a stable environment for these rotating components, holding gear backlash to ≤ 15 arcmin and limiting spindle runout to standard tolerances under actual side-milling forces.