This document is an operating manual for the Virginia Abrasives Variable Speed Diamond Core Drill, Model 433-22000. It provides essential information regarding the safe operation, technical specifications, usage, and maintenance of the tool.
Function Description:
The Virginia Abrasives Variable Speed Diamond Core Drill is a portable diamond core drill designed for drilling bores in various materials, including reinforced concrete, brick, and stone. It can be used as a handheld tool or mounted onto a core drill stand. The drill is equipped with a safety friction clutch, making it easy, safe, and reliable to use. Its applications span construction, pipe installation, road and bridge construction, and engineering quality control and sampling.
Important Technical Specifications:
- Product Number: 433-22000
- Style: Variable Speed, Portable
- Max. Drilling Diameter: 159 mm (6 inches)
- Rated Voltage: 120V
- Rated Frequency: 50/60Hz
- Rated Input Power: 2000W
- No-load Speed: 0-1950 r/min
- Net Weight: 6.5kg
- Maximum Permitted Liquid Supply Pressure: 80 PSI
Usage Features:
The manual emphasizes several key aspects for safe and effective use:
- Work Area Safety: Keep the work area clean, well-lit, and free from flammable liquids, gases, or dust. Children and bystanders should be kept away to prevent distractions.
- Electrical Safety: Power tool plugs must match the outlet, and no adapters should be used with grounded power tools. Avoid body contact with grounded surfaces. Do not expose the tool to rain or wet conditions. The cord should not be abused or used for carrying, pulling, or unplugging. An extension cord suitable for outdoor use (minimum 14 gauge) should be used when operating outdoors. If operating in damp locations, a Ground Fault Circuit Interrupter (GFCI) protected power supply is required.
- Personal Safety: Users must stay alert, use common sense, and avoid operating the tool while tired or under the influence of drugs, alcohol, or medication. Personal protective equipment, including eye protection, dust masks, non-skid safety shoes, hard hats, and hearing protection, should always be worn. Prevent unintentional starting by ensuring the switch is in the off position before connecting to a power source or carrying the tool. All adjusting keys or wrenches must be removed before turning the tool on.
- Power Tool Use and Care: Do not force the power tool; use the correct tool for the application. Never use a malfunctioning tool. Disconnect the plug from the power source before making adjustments, changing accessories, or storing the tool. Store idle tools out of reach of children and ensure only trained persons operate them. Maintain power tools by checking for misalignment, binding, or damaged parts. Keep cutting tools sharp and clean. Use the tool, accessories, and bits according to instructions and working conditions.
- Diamond Core Drill Specific Warnings: Use auxiliary handles to maintain control. Do not use the drill in damp or wet locations, or expose it to rain. Ensure the work area is well-lit and free of flammable materials. Class I tools require proper grounding; do not connect the green/yellow wire to a live terminal. The power outlet must be properly grounded, and Class I tools should not be plugged into an ungrounded outlet. Use three-prong conductor cords with reliable grounding for extension cords. Verify proper grounding of the power source and check for hidden power lines, plumbing, or gas lines before drilling. When drilling ceilings, rope off areas above and below to prevent falling debris. Ensure no water leaks when connecting to a water source to prevent electrical hazards and motor damage.
- Handling Instructions:
- Core Rig Stand Use: When using with a core rig stand, securely fix the base to the workpiece with expansion bolts, then tighten the four bolts on the base uniformly with nuts.
- Core Bit Installation: Carefully install the diamond bit, ensuring the end thread matches the output shaft. Lightly grease the drill's thread.
- Water Supply: Connect the drill to a water supply and open the valve. Waterless operation is forbidden; sufficient water flow is needed to cool the core bit and remove slurry.
- Drilling Materials: When drilling reinforced concrete and encountering steel, the load and vibration may increase. Reduce working pressure to prevent overloading. If gravel or debris causes the clutch to slip, stop the drill and re-torque the clutch. If thermal overload trips, allow up to 3 minutes to reset. Drill slowly and uniformly when drilling thick asphalt or other materials.
- Removing Drill Core: Reduce drill speed when the bit is almost through the material to maintain control. Be careful when removing the core to avoid damage to the drill and bit.
- Ventilation: Keep the motor ventilated and do not block vents. Allow the drill to cool between uses.
- Vibration Adjustment: If the drill vibrates when using a core drill stand, adjust the gap between the elevating body, square pipe, and rack by tightening bolts on the track lining or idle wheel.
- GFCI: Never use the core drill without the provided GFCI. Test the GFCI before each use: the red light should illuminate after pressing "RESET" and turn off after pressing "TEST." The tool operates only when the GFCI is functioning correctly.
- Water Control: Keep water away from the tool's electrical compartment and use appropriate water collection/control.
Maintenance Features:
- Service: Malfunctioning drills should be taken to an authorized service center; do not attempt repairs or part replacements yourself.
- Electric Brush and Commutator: Periodically check the electric brush and commutator. Replace brushes when worn to about 7mm, using only original Virginia Abrasives equipment. Both brushes must be changed simultaneously. If heavy sparking occurs or the commutator is seriously worn/burned, the commutator may need replacement.
- Periodic Checks: The drill should be checked and repaired periodically. Inspect the power cord for wear and ensure reliable grounding. The switch and plug must function properly. Confirm that exterior bolts and screws are tightened.
- Sealing Washers: Replace the rubber sealing washer if water enters the top of the drill. If lubricating oil leaks into the mid-cover air vent, replace the rubber sealing oil ring on the rotor spindle.
- Lubrication: Use only #110 industrial gear oil; do not use common engine oil.
- Storage: Store the drill in a dry, clean place. Keep it clean and dry when not in use. Remove the drill bit from the main shaft and apply a small amount of grease to the threads.
- Safety Clutch: Adjust the safety clutch if it slips during use.
- Standard Accessories: The drill comes with 2 electric brushes.
Troubleshooting Guide:
The manual includes a troubleshooting table for common issues:
- Motor doesn't run: Check power supply, reset breaker, check/replace switch, replace electric brush, or check/replace stator & rotor circuit.
- Heavy sparks/ring sparks on commutator: Repair/replace rotor, adjust spring pressure, or replace with new motor.
- Drill vibrates (with core drill stand): Reassemble/fix frame, adjust gap, or check bolts.
- Drill speed is slow: Repair/replace drill bit, remove foreign materials, adjust/tighten fastening bolts, or re-torque clutch.
For support, users are directed to call Virginia Abrasives at 800.446.1805. The manual also includes environmental protection information, advising users to recycle waste electrical products and not dispose of them with household waste.
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