Correa A20/18 Bed type milling machine

CORREA BED TYPE MILLING MACHINES model A-20

STARSETT - FRASMACHINEN modell A-20

THE STANDARD MACHINE FEATURES
5peed Ьox gears and shafts of carburized, hardened and ground molybdenum-chrome steel.
Spiral spur gear driven spindle to eliminate vibrations.
Electromagnetic main spindle brake.
Hydraulic speed change.
The longitudinal, verticaI and cross slideways feature steel band inserts hardened to 60 Rc.
Automatic slideway lubrication via oil flow metering units located at the lubrication points.
feed motor.
EIectromagnetic clutches for the feed selection.
Longitudinal, cross and verticaI screws, the latter being hydraulically counterbalanced.
Longitudinal, vertical and cross electromagnetic brakes.
Complete machine operation from the pendant panel.
Dual controls for manual machine operation.
Automatic bed shaft enabling the possibility of automating, dividing heads, rotary index tables, etc.
Main spindle with a twist-on type tool-holder.
Precision scales on all three movements.
Model: A 20Γ15
Model A-10/15
MACHINING CAPACITY  
DIMENSIONS

A = 2600
B = 2900 A-20/25
c = 4400 i L
A = 2600 M 2200
B = 3600 1
c = 5800 

TECHNICAL CHARACTERISTICS 
MACHINES  CHARACTERISTICS 

Machine Technical Specifications

Model Specifications:

Surface Dimensions: 100 x 700 mm (varies by model)

T-Slot Dimensions (T-Slots): 6 x 22 H8

Distance between T-Slots: 112 mm

Distance between T-Slots for T-Nuten: 112 mm

Automatic Longitudinal Movement: Available

Automatic Cross Movement: Available

Automatic Vertical Movement: Available

Spindle and Motor Specifications:

Spindle Nose: ISO 50

Number of Spindle Speeds: 18

Spindle Speed Range: 40 - 4000 RPM (varies per model)

Feed Speed Range: 5 mm/min – 5000 mm/min

Rapid Traverse Speed: Available (specific values not mentioned)

Spindle Motor Power: 15 kW

Feed Motor Power: 3.5 kW

Weight:

Weight: 9,500 kg (approx.)

Standard Equipment:

Complete Electrical Equipment: Included

Coolant Equipment: Included

Cutter Arbor: Included

Set of Wrenches: Included

Grease Gun: Included

Service and Spare Parts Manual: Included

Main Standard Machine Components:

Speed Box:

Gears and Shafts: Over-sized, carburized, hardened, and ground.

Lubrication: Automatic mist lubrication system.

Spindle Braking: Includes brake for quick main spindle stop.

Vibration Reduction: Spindle spur feeding gears designed to eliminate vibrations during milling.

Hydraulic Speed Change:

Shifting Mechanism: Double action hydraulic piston-operated shift gearing for smooth speed changes.

Machine Pendant Control:

Controls: All machine operations, such as start-up, stop, slide movements, brakes, and feeds, are controlled from the pendant panel, improving operational efficiency by eliminating unnecessary movements.

Slideways:

Surface: The slide flange surface that mates with the column unit is equipped with plastic liners to improve sliding action.

Vertical Adjustment: Facilitates easier vertical adjustment for precise positioning.

Longitudinal, Cross, and Vertical Movements:

Ball Leadscrews: These movements are powered by 10 mm pitch ball leadscrews, providing accurate motion.

Vertical Adjustment: The vertical movement is counterbalanced by a hydraulic cylinder, which helps reduce stress on the leadscrew and prolong its life. The pressure of this hydraulic system is maintained through an accumulator, compensating for the weight of the carrier and overarm.

These features and specifications highlight the advanced functionality, precision, and efficiency of the machine, making it suitable for heavy-duty milling and machining tasks. The hydraulic and automated systems help in maintaining the machine's performance while reducing operator fatigue and wear on components.

Optional Accessories and Equipment

Twist-On Tool Holder

Enables quick tool changing with minimal operator effort.

Horizontal Milling Attachment

Recommended for use with train cutters on shafts.

Vertical Milling Head

Rotates 360° in one plane for enhanced rigidity during rough-cut operations.

Quill Vertical Head

Rotates 360° in one plane, with a down-feed quill for drilling, boring, and facing operations.

Features a 125 mm automatic stroke quill with three feed speeds: 0.063 mm, 0.125 mm, and 0.250 mm per spindle revolution.

Rapid return incorporated, and a mechanical twist-on tool-holder is provided.

Maximum power: 11 kW.

Twin Spindle Milling Head

Features two spindles arranged at a square angle, improving productivity and quality.

Allows square-angle plane milling on the same setup.

Horizontal Milling Head (for Rotary Index Tables)

Recommended for use with rotary index tables, enabling milling, boring, and drilling on different planes.

Ideal for numerical control (NC) machines.

Digital Positioner

Three-axis positioning control unit.

Data can be input manually or via cassette, with unlimited repetition through internal memory.

Other Optional Arrangements and Accessories:

Hydraulic Clamps: Hydraulic locking systems for secure workholding.

Pendulum, Square, and Cubic Cycles: Support for specific cycle types.

Numerical Control: Advanced control systems for automated operations.

Hydraulic Tracers: Hydraulic tracing systems for copying profiles.

Electronic Tracers: Electronic systems for precision copying.

Digital Read-Outs: Digital display systems for real-time measurement.

Optical Readers: Optical systems for reading data from workpieces.

Longitudinal Travel (up to 6 m): Extended travel capability.

Slotting Attachment: Attachment for slotting operations.

Spiral Milling Device: For milling spiral shapes.

Universal Dividing Head: Essential for dividing operations.

Mechanical and Hydraulic Vises: Vises for precise clamping.

BERG Power Drawbar: Automatic tool clamping device.

Manual and Automatic Rotary Index Tables: Tables for rotational work.

Long and Short Cutter Arbors: Adjustable arbors for cutting tools.

Collet Holder and Complete Set of Collets: For securing tools with high precision.

Reduction Sleeves: Sleeves for adjusting tool holder sizes.

Key Features:

These accessories and optional setups greatly enhance the flexibility, precision, and productivity of the machine, making it adaptable to a variety of milling, drilling, and machining tasks.

The wide range of attachments and control options provides users with solutions for both simple and complex machining processes, ensuring versatility and high-performance operations.