HiKOKI G 13BYEQ2 Disc Grinder

Product Overview

This document provides handling instructions, safety warnings, specifications, and maintenance information for the HiKOKI G 13BYEQ2 Disc Grinder.

Key Features and Specifications

Electronic Control Features

• Soft start: Manages startup rotations to reduce recoil.
• 0 Voltage Re-start Protection: Prevents unexpected restart after power interruption.
• Constant speed: Maintains speed under load.
• Overload protection: Protects the motor by cutting power during overload.
• Rotation recovery control function: Automatically resumes operation after overload if the cause is eliminated.
• Overheat protection: Stops the motor if it overheats.
• Brake function: Activates when the trigger is released.
• Brake system works even in power outage.

Applications

• Removal of casting fin and finishing of various types of steel, bronze, and aluminum materials and castings.
• Grinding of welded sections or sections cut by means of a cutting torch.
• Grinding of synthetic resins, slate, brick, marble, etc.
• Cutting of synthetic concrete, stone, brick, marble, and similar materials.

Safety Warnings

General Power Tool Safety Warnings

WARNING: Read all safety warnings, instructions, illustrations, and specifications. Failure to follow may result in electric shock, fire, or serious injury.

• Work Area Safety: Keep clean and well-lit. Do not operate in explosive atmospheres. Keep children and bystanders away.
• Electrical Safety: Use correct plugs and outlets. Avoid body contact with grounded surfaces. Do not expose to rain or wet conditions. Do not abuse the cord. Use outdoor-rated extension cords if applicable. Use RCD for damp locations.
• Personal Safety: Stay alert. Use common sense. Do not operate when tired or under the influence of drugs/alcohol. Wear personal protective equipment (eye protection, dust mask, safety shoes, hard hat, hearing protection, gloves). Prevent unintentional starting by ensuring the switch is OFF. Remove adjusting keys/wrenches. Do not overreach. Dress properly; avoid loose clothing and jewelry. Use dust extraction if provided. Do not become complacent.
• Power Tool Use and Care: Do not force the tool. Use the correct tool for the application. Do not use if the switch is faulty. Disconnect power before adjustments or accessory changes. Store out of reach of children. Maintain tools and accessories; repair if damaged. Keep cutting tools sharp and clean. Use tools according to instructions. Keep handles dry and clean.

Safety Warnings Common for Grinding or Abrasive Cutting-Off Operations

• This tool is intended as a grinder or cut-off tool.
• Operations like sanding, wire brushing, polishing, or hole cutting are not recommended.
• Do not convert the tool.
• Use only accessories specifically designed for the tool and guard.
• Accessory rated speed must be at least equal to the tool's maximum speed.
• Accessory diameter and thickness must be within the tool's capacity.
• Accessory mounting dimensions must fit the tool's hardware.
• Do not use damaged accessories. Inspect before use. Run at no-load speed for one minute after installing an accessory.
• Wear appropriate PPE (face shield, goggles, safety glasses, dust mask, hearing protectors, gloves, apron).
• Keep bystanders at a safe distance.
• Hold by insulated gripping surfaces when contacting hidden wiring.
• Position cord clear of the spinning accessory.
• Never lay the tool down until the accessory stops.
• Do not run the tool while carrying it at your side.
• Regularly clean air vents.
• Do not operate near flammable materials.
• Do not use accessories requiring liquid coolants.

Kickback and Related Warnings

Kickback is a sudden reaction to a pinched or snagged accessory, causing the tool to be forced in the opposite direction of rotation. Avoid by:

• Maintaining a firm grip with both hands and positioning body to resist kickback.
• Never placing hands near the rotating accessory.
• Not positioning body in the tool's potential kickback path.
• Using special care on corners, sharp edges, and avoiding bouncing.
• Not attaching saw chain blades, segmented diamond wheels with gaps >10 mm, or toothed saw blades.

Additional Safety Warnings Specific for Abrasive Cutting-Off Operations

• Do not "jam" the cut-off wheel or apply excessive pressure.
• Do not position body in line with and behind the rotating wheel.
• If the wheel binds, switch off and wait for it to stop completely. Investigate the cause.
• Do not restart cutting in the workpiece; let the wheel reach full speed.
• Support oversized workpieces to minimize pinching and kickback.
• Use extra caution for "pocket cuts" into existing walls.
• Do not attempt curved cutting.

General Safety Instructions for Grinders

• Attach side handle firmly, hold with both hands.
• Ensure wheel speed is equal to or greater than the grinder's rated speed.
• Ensure wheel dimensions are compatible.
• Inspect grinding wheels before use.
• Ensure mounted wheels/points are fitted correctly.
• Use blotters if provided.
• Mount and tighten abrasive products correctly; run at no-load for 30 seconds to check for vibration.
• Never use the tool without a guard if equipped.
• Do not use reducing bushings/adapters for large hole wheels.
• Ensure threaded hole wheels have sufficient spindle length.
• Do not use cut-off wheels for side grinding.
• Ensure sparks do not create hazards.
• Keep ventilation openings clear.
• Always use eye and ear protection.
• Be aware of the wheel continuing to rotate after switch-off.
• Use appropriate wheel guard (Type A for cutting-off, Type B for grinding).

Mounting and Operation

Refer to figures for specific actions. Key operations include:

• Attaching and removing guard clip.
• Fitting and adjusting the wheel guard.
• Fixing the side handle.
• Assembling depressed center wheels, cutting wheels, and diamond wheels.
• Switch operation.
• Grinding angle and method (rough grinding at 15°-30°).
• Cutting work (work against the run of the disc).
• Selecting accessories.

WARNING: Ensure wheel nut is tightened securely. The wheel washer (C) is specific to this product.

NOTE: For 0 voltage re-start protection, return switch to OFF for 1 second before restarting.

Grinding Method: For new wheels, pull back when pushing forward. Once worn, grind in both directions. For cutting, always work against the run of the disc to avoid kickback.

WARNING: Do not use specific dust collection guards for diamond cutting discs (Code No. 377085, 377086) as they may prevent correct switch operation.

Maintenance and Inspection

WARNING: Switch OFF and disconnect plug before maintenance. Using damaged wheels can lead to breakage.

• Inspect depressed center wheels for cracks and defects.
• Inspect and tighten all mounting screws.
• Supply cord replacement must be done by authorized service center.
• Clean filter regularly using a soft brush or air gun (wear PPE). Replace if damaged.
• Exchanging filter set: Be careful not to let debris enter the tool body.
• Motor maintenance: Protect winding from damage, oil, or water. Periodically run motor with no load to expel dust.
• Cleaning: Wipe exterior with a soft dry cloth or soapy water. Avoid solvents.
• Storage: Store in a place with temperature below 40°C, out of reach of children.

Parts Identification

Standard Accessories

• Wheel guard
• Guard clip
• Side handle
• Wrench

Standard accessories are subject to change without notice.

Symbols

WARNING: Understand the meaning of the following symbols:

• ? G13BYEQ2: Disc Grinder
• ? To reduce the risk of injury, user must read instruction manual.
• ? Always wear eye protection.
• ? Always operate the power tool with two hands.
• ? Not for cut-off operations. When using a cutting-off wheel, be sure to attach the Type A wheel guard. When using a type B wheel guard for cutting-off operations with bonded cut-off wheels, there is an increased risk of exposure to emitted sparks and particles, as well as exposure to wheel fragments in the event of a wheel burst.
• ⚡ V: Rated voltage
• 〰️ ~: Alternating current
• ⚙️ n: Rated speed
• ? /min: Revolution or reciprocations per minute
• ▶️ I: Switching ON
• ⏹️ O: Switching OFF
• ? Lock
• ? Unlock
• ? Disconnect mains plug from electrical outlet
• ⚠️ Warning
• [Class II Tool] Class II tool

Diagram Descriptions

The document contains numerous diagrams illustrating:

• Parts identification (Figure 1).
• Correct handling and grip (Figure 2).
• Assembly and attachment of guards, handles, and wheels (Figures 3-8, 12).
• Operation techniques such as grinding angles and cutting methods (Figures 9-10).
• Maintenance procedures like filter cleaning and replacement (Figures 11-12).
• Accessory types and their compatibility with guards (Page 12).
• Individual accessories with part numbers (Page 13).