Hoffman CBM Glazing Bar Scribing Machine

Hoffmann CB-M is a professional level, bench-top end coping machine for precise end trimming of applied window and door mullions. Manual bench-top routing machine for end coping of applied window and door mullions and designed to produce an exact counter-profile on the ends of glazing bars when manufacturing Georgian style windows, door manufacturing and furniture.

Hoffmann have developed a bench-top machine to solve this difficult manufacturing process. The Hoffmann CB-M is an adaptable bench-top model for counter-profile routing the ends of profiled glazing bars. Using opposing direction router motors it produces a counter profile cut without breakout to one side of the profile.

The two router motors have variable speed control and counter-rotation (left / right). They can be adjusted for the optimum speed to suit various wood species and profile shape and therefore produce the best possible finish.

Plant-on Georgian Glazing Bars
Since the introduction of sealed double glazing units to the window industry, the aesthetic appearance of multi paned wooden windows has been compromised. One option was to install numerous individual sealed units into a traditionally constructed multi paned Georgian-style window. But the alternative was to fabricate a window with a full size double glazed unit, then construct a grid to represent the numerous small panes in the Georgian-style and plant this grid on the glass with a dedicated type of adhesive tape.

Details
Although labour intensive, this alternative method is still cost effective compared with installing individual sealed units. This grid can be created with interlocking half-lap joints but then the ends need to have a counter profile to fit the detail shape on the window frame. Alternatively all joints can be made with counter profiled ends.

The machine is supplied without tooling, due to the variation of glazig bars on the market. Fitted with variable speed motors so the design enables the optimum working speed for each wood species and therefore the quality of cut.