The HOLZSTAR MDB 21 mortising machine with dowel drilling device is a professional machine designed for multiple and precise drilling for wooden dowel insertion. It is particularly suitable for panel furniture construction, cabinets, carcasses, frames, doors, shelves and components requiring repetitive drilling with constant spacing and accurate alignment.

The drilling unit is equipped with 21 spindles, with 32 mm spacing and 640 mm distance from the first to the last spindle. This configuration allows rows of holes to be produced in a single operation, reducing machining time and improving repeatability compared with manual drilling or single-spindle machines. The maximum drilling width of 640 mm makes it suitable for panels and larger components typically used in furniture and interior production.

The drilling unit can be pneumatically swivelled from 0° to 90°, allowing the operator to switch from horizontal to vertical drilling according to the workpiece configuration and joint type. This makes the machine suitable for both edge drilling and drilling on flat surfaces, increasing flexibility in the production of furniture components, frames and structures assembled with wooden dowels.

The maximum drilling depth at 90° is 50 mm, while drilling depth and drilling height are displayed by counters. This allows the operator to control the working position more accurately and repeat the same setting on multiple workpieces. The adjustable drill feed allows the process to be adapted to the material type, drill diameter and required finish.

The two adjustable pneumatic workpiece holders secure the workpiece before drilling. Pneumatic clamping is especially useful for repetitive operations, as it speeds up the work cycle and keeps the panel stable while the drills enter the material. Operation of the main functions, clamping, drilling and releasing, via foot pedal allows the operator to work quickly while keeping both hands free to position and control the workpiece.

The 890x625 mm work table provides a large and stable support surface. Sturdy side stop profiles on the right and left, with scale and flip stop, allow workpieces to be positioned quickly and drilling dimensions to be repeated. The 3 metre aluminium rear stop with scale and 2 flip stops facilitates machining of long panels and serial components, improving precision, alignment and productivity.

The standard equipment includes six quick-change drill chucks for 10 mm shanks, allowing tools to be changed quickly and the machine to be adapted to different drilling configurations. Quick-change tooling reduces setup times and makes switching between different operations more efficient. The two parallel guides with flip stop help keep the workpiece correctly positioned during drilling.

The 1.5 kW input motor, 1.1 kW output power and 2800 min⁻¹ spindle speed provide performance suitable for professional drilling of wood and panels. The 400 V three-phase power supply and 6–8 bar working pressure indicate a machine designed for structured production environments where continuous operation, precision and repeatable cycles are required.

In practical use, before machining it is advisable to check stop settings, drilling depth, drilling unit orientation and correct pneumatic clamping of the workpiece. For series production, a test on a sample panel is recommended to check spacing, depth, edge distance and dowel alignment before proceeding with the final batch.

The HOLZSTAR MDB 21 is therefore a professional solution for multiple drilling of panels and wooden components. The combination of 21 spindles, 32 mm spacing, 0° to 90° swivelling unit, foot pedal control, pneumatic clamps, scaled guides, flip stops and 3 metre rear stop makes it suitable for woodworking shops and furniture manufacturers that need precise, repeatable and fast drilling for wooden dowel joints.