Product Knowledge

STONE Unveils LXD3-CNC-300E CNC End-milling Machine, Setting New Standards for Aluminum Mullion Proc

26 Nov, 2025

STONE introduces the LXD3-CNC-300E CNC End-milling Machine, a specialized solution engineered for the high-precision forming of aluminum door and window mullion profiles. Integrating global insights and advanced technology, this new model delivers exceptional performance in end facing, step facing, edge trimming, and rectangular slot drilling—all without the need for frequent tool changes.

Designed for versatility and ease of use, the LXD3-CNC-300E enables manufacturers to process a wide range of profile types simply by adjusting the tool position via CNC. Its compact structure, wide processing range, and operator-friendly design make it an ideal choice for workshops seeking to enhance productivity while maintaining consistent output quality.

Key Features Enhancing Performance & Safety:

  • High-Precision CNC with 3-Axis Linkage: Ensures accurate milling and fast adaptation to profiles of varying shapes and sizes.

  • Servo-Driven Feeding System: Equipped with a rack-and-pinion mechanism for adjustable feed rates, supporting smooth cutting and rapid retraction to optimize cycle times.

  • 90° Flip Milling Cutter: A dedicated horizontal spindle with pneumatic flipping allows efficient milling of reinforced mullion profiles.

  • System-Controlled Tool Travel: Maximizes processing efficiency with programmable stroke control.

  • Reinforced Clamping & Enclosed Design: A thickened pressing plate minimizes profile deformation during operation, while the fully enclosed cover ensures a safer, cleaner, and more environmentally friendly workspace.

The LXD3-CNC-300E reflects STONE’s ongoing commitment to developing intelligent and reliable equipment for the door and window industry. This machine is set to help manufacturers reduce downtime, increase flexibility, and achieve new levels of machining consistency.