Coolant-Through 90° Right Angle Heads (BOD NL / Z80 Series)

Coolant-Through 90° Right Angle Heads (BOD NL / Z80 Series)

Welcome to the BOD NL Series, featuring our heavy-duty, internal coolant-through-spindle (CTS) 90-degree right angle heads. Engineered by Beijing BOD Technology Co., Ltd., this series includes the DK90-BT40-ER25-Z80 and DK90-BT50-ER25-Z80 models, designed specifically to expand the capabilities of BT40 and BT50 machining centers. These tools allow manufacturing workshops to perform side drilling, deep-hole processing, and heavy side milling on challenging materials like stainless steel, titanium alloys, and forged mold steels without thermal tool degradation. By routing high-pressure cutting fluid directly through the cutting centerline, these heads ensure active chip evacuation and temperature control during enclosed, multi-face machining cycles.

High-Pressure 20 bar (290 PSI) Coolant-Through-Spindle (CTS) Technology

Deep lateral cavities and pocket milling often cause severe heat buildup and chip nesting. To address this, the BOD NL Series incorporates specialized high-pressure rotary joint seals and dual-lip fluororubber (FKM) sealing technology. This arrangement allows the angle head to continuously withstand internal coolant pressures of up to 20 bar (290 PSI). Delivering cutting fluid directly through the ER25 spindle and tool centerline suppresses thermal shock at the tool’s carbide cutting edges, extends tool insert life, and flushes chips out of blind holes to protect machined surface finishes.

Monoblock QT500-7 Cast Iron Housing Built for Heavy Hydraulic Pressure

Sustaining high-pressure fluid flow while maintaining cutting rigidity requires a highly robust structural casing. The bodies of the NL Series are cast as a single monoblock from heavy-wall QT500-7 Ductile Cast Iron. After casting, each housing undergoes a complete sequence of artificial aging and cryogenic stress-relief treatments. This structural stabilization ensures that the angle head housing resists deformation or deflection when subjected to high internal hydraulic pressures and external radial cutting forces, minimizing tool chatter during heavy side milling.

Gleason Precision Gearing and High-Speed Spindle Performance

For reliable torque delivery and low operational noise under load, the NL Series is built with high-quality internal mechanical components:

  • Gleason Spiral Bevel Gears: Made of 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 full-load operating noise is limited to ≤ 70 dB.

  • Performance Metrics: The DK90-BT40-ER25-Z80 model features a compact 80 mm gage length and handles up to 46.0 Nm of cutting torque at speeds up to 6,800 RPM.

  • P4 Spindle Bearings: High-precision, preloaded P4 class spindle bearings ensure low rotational runout and stable tool rotation over extended duty cycles.

FAQ

Frequently Asked Questions

Common questions about our products and services.

A: The BOD NL (Z80) coolant-through right-angle heads are engineered to withstand internal coolant-through-spindle (CTS) pressures up to 20 bar (290 PSI). The internal spindle is fitted with high-pressure rotary joints and dual-lip fluororubber (FKM) sealing technology, allowing high-pressure cutting fluid to flow directly through the centerline of the ER25 tool holder without leakage.
A: The DK90-BT40-ER25-Z80 model features an ER25 output spindle, an 80 mm gage length, and is designed to interface with standard BT40 machine spindles. It is capable of transmitting up to 46.0 Nm of torque at rotational speeds up to 6,800 RPM. These specifications make it suitable for executing medium side milling, tapping, and side drilling operations.
A: The casing is cast from heavy-wall QT500-7 Ductile Cast Iron and undergoes both artificial aging and cryogenic stress-relief treatments. This dense, monoblock structural design prevents the housing from deflecting under the dual stresses of high radial cutting forces and up to 20 bar of internal fluid pressure, helping to maintain processing accuracy and spindle alignment.