Donau DR 23, DR 32 DR 50 Rapid radials

DONAU-Rapid-Radials DR 23, DR 32, DR 50

Everybody who faces progressive methods positively, working on most different workpieces, will understand that rationalization is possible, especially in drilling operations. DONAU-Rapid-Radials are predestined to do this. Therefore, our motto is positioning of the spindle head with minimal expenditure of force at stationary workpieces, simultaneously enabling one-hand operation of all operating elements, with an immediate and effective hydraulic clamping system that makes essential shorter positioning times. Our experiences in manufacturing the DONAU-Rapid-Radials are combined in this catalog, providing suggestions for rationalizing drilling operations.

Our further production line includes:

DONAU-Numerically Controlled Drilling Machine NC 40
Travel in x-axis: 1000 to 20,000 mm
Travel in y-axis: 1000 or 1200 mm

DONAU-Production Milling Machines Type FU, FW, FV
Worktables from 1200 to 1600 mm

DONAU-Precision-Rotary Tables 320 to 1000 mm diameter

Universal-Rack-Milling Machine Type UZFM-V up to Module 12 in steel

Rapid-Radial combines high force and a very rigid construction with nearly fingertip ease of movement.

Construction of the Machines

1. Spindle Head
Spindle head with gear for drive of drilling spindle by change-pole motor for high change-over frequency.
Speeds manually adjustable, motor protected against overloading by thermo-elements, gear by adjustable safety clutch.

Automatic feed adjustable by knurl button - at running drilling spindle too - and switching on by push button over electro-magnetic clutch.
Feed shut-off by lifting a tilting lever or by adjustable depth stop automatically.

DR 32
Most predestined for drilling as well as tapping.

Control Panel and Control Lever
All electric switches are mounted at the face of the spindle head in the control panel, conveniently arranged for operation with the left hand.
Since clamping for the column and arm can be released as well as the column travel for the spindle head, simultaneous movement in axial, radial, and vertical directions by pressing the switches on the control panel with the same hand is possible.
To operate deep holes, the column will be set deeper without releasing the clamping, and the position of the tool will be preserved exactly.

DR 23
Mostly used as an automatic tapping machine.

3. Axial Arm and Column
Adjustable column way bearing, carried in machine base and concentrically aligned. Raising and lowering by brake motor, using lead screw with trapezoidal threads, bearing nut, and safety nut. The spindle head is secured against radial twisting, so the tool position is maintained during tool changes or when drilling deeper holes.
Standard design with strong lifting below to protect the column. Axial arm with hardened and ground guideways, diagonally guided in the cross head on robust bearings.

Guide bearings are built in free of play and adjustable by eccentric pin.

Key Features:

Clamp System: The machines feature a clamping system that uses a hydraulic system for secure, consistent workpiece holding without requiring adjustment over time. This ensures precision and reliability even in case of hydraulic failure.

Electrical Equipment: Machines are ready for 380V, 3-phase power supply with a neutral wire. There is a complete electrical setup in the control cabinet, easily accessible for maintenance.

Machine Frame & Work Table: The machine frame is made of sturdy cast iron with adjustable column bearings and spindle mounts. The work table is customizable, allowing easy handling of various workpieces and setups.

Spindle Head: It features adjustable spindle speed controls and a guide system to hold the spindle, ensuring optimal performance.

Automatic Tapping Setup: For efficient threading without specialized threading chucks, the machine automatically switches to the left spindle direction when a set threading depth is reached.

Coolant System: Includes a large coolant reservoir with a submersible pump for cooling during drilling operations. This helps maintain tool life and workpiece quality.

T-slots and Fixtures: The machines come with vertical T-slots for adding custom fixtures or clamping devices to secure workpieces during operation.

Rotary Handle and Speed Adjustment: Rotary handles allow quick changes in spindle speed or direction, optimizing the machine for tapping and other tasks requiring precise control.

Worktable: The worktable can be customized for different workpiece sizes, including smaller or larger plates for diverse production needs.

Additional Equipment:

Revolving Head: For using multiple tools, reducing downtime.

Cooling Fluid System: With automatic control, useful for long or complex drilling operations.

Fixtures: Specialized fixtures are available for handling different workpieces like cylinder blocks, motor parts, and other large components.

Machine Variants:

Hanging and Movable Designs: These models are useful in setups where mobility and versatility are required, such as in production lines or for processing large parts.

Customizable Worktables: Depending on the model, worktables come in different sizes and configurations to accommodate various tasks.

Technical Specifications:

Drilling Capacity: The machines are capable of drilling through materials like cast iron, with different capacities depending on the model.

Column Size: The size varies with the model (e.g., DR 23, DR 32, DR 50), which affects the overall strength and precision of the machine.

Spindle Sizes: Depending on the model, spindles may have different Morse taper sizes for versatile tool compatibility (MK3, MK4, MK5).

Applications:

These radial drilling machines are suited for various tasks, including:

Drilling, tapping, and reaming motor blocks, cylinder heads, and other large, heavy components.

They are adaptable to production lines, making them suitable for high-volume, repeatable manufacturing processes.