The Unibor CR35 is a magnetic drilling machine designed for industrial use, capable of drilling holes in ferrous metals, construction, railway, petrochemical, and other applications where drilling ferrous metal is performed. It is intended for professional use and requires adherence to safety guidelines to prevent injury and ensure proper operation.
Function Description
The Unibor CR35 is a magnetic drilling machine that utilizes a powerful electromagnet to secure itself to ferrous metal surfaces, allowing for precise and stable drilling operations. It is designed to create holes with an arbor bore of 3/4" diameter and a maximum hole cutting capacity of 2.3/3C steel at 35mm diameter and 50mm deep. The machine is equipped with a motor that can operate on either 110V 50-60 Hz or 230V 50-60 Hz, delivering a normal full load of 1050W and 10A (for 110V) or 5A (for 230V). The electric magnet provides a holding force of 8000N at 20°C with 25mm minimum plate thickness, ensuring a strong grip during operation.
Important Technical Specifications
- Arbor Bore: 3/4" diameter
- Maximum Hole Cutting Capacity: 35mm diameter, 50mm deep (in 2.3/3C steel)
- Motor Unit:
- Voltage Options: 110V 50-60 Hz or 230V 50-60 Hz
- Normal Full Load: 1050W
- Current: 10A (110V) / 5A (230V)
- Electric Magnet:
- Size: 160 mm long
- Holding Force: 8000N (at 20°C with 25mm minimum plate thickness)
- Current: 0.53A
- Overall Dimensions:
- Height: 435 mm
- Width: 155 mm
- Length Overall: 245 mm
- Net Weight: 12 kgs
- Vibration Total Values (triax vector sum) in accordance with EN50144:
- Vibration Emission Value (ah, D): a W= 1.95 m/s²
- Uncertainty (K): 1.5 m/s²
- Level of Sound Pressure in accordance with EN50144:
- LpA: 85 dB(A)
- LwA: 97 dB(A)
- Uncertainty (K): 3dB(A)
- Extension Cable Selection:
- 3-meter cable: 2.08mm² (LIVE, NEUTRAL, EARTH)
- Recommended for 110V supply: 3.5 metres of 3 core x 1.5mm²
- Recommended for 230V supply: 6 metres of 3 core x 1.5mm²
Usage Features
The Unibor CR35 is designed for ease of use while prioritizing safety. It comes with a control panel that includes a drill stop/start switch and a magnet switch. The machine is equipped with a coolant bottle assembly to ensure proper cooling during drilling, extending cutter life and improving performance.
- Operation: Before starting, ensure the machine is securely clamped to the workpiece using the magnet. Always check that the magnet is fully engaged and holding the machine firmly. The control panel allows for easy activation of the drill motor and magnet.
- Cutter Mounting: The machine is designed to accept cutters having 19.05mm diameter Weldon shanks. To mount cutters, lay the machine on its side with the feed handles uppermost, insert the arbor into the spindle, and secure it with socket screws.
- Workpiece Requirements: The workpiece material should be at least 25mm thick for the magnet to achieve its full holding force. If the material is thinner, additional measures such as clamping or using a suitable material thickness underneath the workpiece are necessary to ensure a secure method of restraining the machine.
- Safety Features: The machine incorporates safety features such as a 13A fuse for protection against electrical overload. It is crucial to always wear appropriate personal protective equipment (PPE) including eye protection, ear defenders, and recommended PPE when operating the machine.
- Troubleshooting: The manual provides a comprehensive troubleshooting guide for common issues such as the magnet or motor not functioning, holes breaking quickly, or excessive drilling pressure. This helps users diagnose and resolve problems efficiently.
Maintenance Features
Regular maintenance is essential to ensure the longevity and optimal performance of the Unibor CR35. The manual outlines a maintenance schedule and procedures for various components.
- Maintenance Schedule:
- Every Operation: Visual check of the machine for damage, operation of the machine.
- 1 Week: Check brush wear.
- 1 Month: Check magnetic base, check grease, check armature.
- Visual Check for Damage: Inspect the machine for any signs of damage, particularly to the mains cable. Any damage should be addressed immediately to prevent injury or further damage.
- Operation Check: Ensure all components are working correctly.
- Machine Brushes: Check brush wear at least once a week. Brushes should be replaced when worn more than 2/3 of their original length.
- Magnetic Base: Inspect the magnetic base monthly to ensure it is flat and free from damage. An uneven magnet base can cause the magnet not to hold efficiently.
- Gearbox Grease: Check gearbox grease monthly. Grease should be changed at least once a year to prevent wear.
- Armature: Check the armature monthly for any visual signs of damage to the body or commutator. Signs of wear or damage to the commutator or brushes should prompt replacement of the part.
- General Maintenance: Keep the machine clean and free from debris. Regularly check and tighten all fasteners. Ensure the coolant bottle is filled with the correct coolant.
- Service and Repair: Service and maintenance should only be performed by qualified repair personnel. Unauthorized parts or repairs can lead to electric shock or injury.
The Unibor CR35 is a robust and reliable tool designed for demanding industrial drilling tasks, emphasizing both performance and user safety through its design and comprehensive maintenance guidelines.
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