Slim 90° Right Angle Heads (DK90-DC & ER Mini Nut Deep-Reach Series)

Slim 90° Right Angle Heads (DK90-DC & ER Mini Nut Deep-Reach Series)

Welcome to the BOD Slim Angle Head Series, engineered specifically to address narrow clearance and deep-reach machining challenges on vertical and horizontal CNC machining centers. Designed by Beijing BOD Technology Co., Ltd., this series comprises the high-precision DK90-BT40 DC Collet Series and the heavy-duty, deep-reach DK90-BT50 ER Mini Nut Series. Standard right-angle heads often collide with adjacent walls when processing internal ribs, deep-seated pockets, or narrow slots. By integrating ultra-slim housings with low-profile clamping systems, our slim right-angle heads minimize the external cutting-edge diameter, allowing workshops in the aerospace, automotive mold, and precision machinery sectors to access deep, restricted work zones safely.

Ultra-Slim Profiles for Deep-Reach Cavities and Narrow Slots

The primary mechanical advantage of the BOD Slim Angle Head Series is its highly compact housing geometry. The DK90-BT40 DC Collet Series (comprising the DC5M, DC6, DC7, DC8, and DC10 models) and the DK90-BT50 DC Collet Series (extending up to DC16) feature minimized structural cross-sections. This design allows the tool head to descend deep into complex workpiece profiles, narrow internal slots, and thin-walled box structures where standard-width milling heads cannot clear, eliminating the need to execute complicated multi-setup part rotations.

Optimized Tool Clamping: Draw-in DC Collets and ER Mini Nut Spindles

To maintain a small radial profile without compromising tool-holding security, this series utilizes two distinct clamping standards:

  • Draw-in DC Collet System: Employed in the BT40 and BT50 DC series, this system utilizes high-precision draw-in collets to achieve a highly compact external diameter directly at the tool holder tip, providing excellent clearance.

  • ER Mini Nut Spindle Interface: Featured in the DK90-BT50 ER Mini Nut Series (comprising the ER11M, ER16M, ER20M, and ER25M models). This series utilizes specialized M-style mini clamping nuts, which substantially reduce the overall head width while maintaining compatibility with standard, widely available ER collets for high operational flexibility.

Uncompromising Rigidity and Gleason Gear Internals in Slim Housings

Minimizing the size of a right-angle attachment housing usually risks reducing its mechanical strength. To prevent this, BOD slim angle heads maintain rigid manufacturing standards:

  • Precision Gearing: The internal drive trains utilize 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, these gears keep transmission backlash to ≤ 15 arcmin and noise below 70 dB under full load.

  • High-Rigidity Casings: The housings are cast from high-strength alloys or aged QT500-7 Ductile Cast Iron, which undergo rigorous artificial aging and cryogenic stress-relief treatments.

  • Spindle Bearings: Supported by high-precision, preloaded P4 class angular contact bearings, these heads maintain low rotational runout and stable cutting performance under lateral side-milling forces.

FAQ

Frequently Asked Questions

Common questions about our products and services.

A: The difference lies in the tool clamping mechanism and resulting clearance envelope. The Slim DC Collet series (such as the DK90-BT40 DC series) utilizes specialized draw-in collets that pull directly into the spindle taper, achieving the absolute slimmest possible radial profile at the cutting tip. The Slim ER Mini Nut series (such as the DK90-BT50 ER Mini series) utilizes standard ER collets secured with compact M-style mini nuts, providing a highly narrow head width while allowing operators to use standard, off-the-shelf ER tooling.
A: Our slim-profile product family includes: DK90-BT40 DC Collet Series: Comprising the DC5M, DC6, DC7, DC8, and DC10 models. DK90-BT50 DC Collet Series: Comprising the DC5M, DC6, DC7, DC8, DC10, DC13, and DC16 models. DK90-BT50 ER Mini Nut Series: Comprising the ER11M, ER16M, ER20M, and ER25M deep-reach models.
A: Despite their reduced cross-sections, these heads utilize carburized and quenched Gleason spiral bevel gears (HRC 58-62) ground to ISO Grade 4 precision, which prevents drive slip and minimizes backlash (≤ 15 arcmin). Additionally, the compact bodies are cast from premium stress-relieved ductile iron or high-strength alloys, which house high-precision preloaded P4 class angular contact bearings to support the cutting spindle and prevent tool deflection under radial loads.