Hercules HE66 User Manual (English)

Questions and Answers:

B
Brittney SimpsonAug 4, 2025
What to do if my Hercules HE66 does not grind effectively?
- N
  Nicole ThompsonAug 4, 2025
  If your Hercules Grinder does not grind, sand, or brush effectively, check the following: 1. The disc accessory might be loose on the spindle. Ensure the disc accessory is the correct dimension and that the Flange Arbor Nut is tight. 2. The disc accessory might be damaged, worn, or the wrong type for the material. Check the condition and type of disc accessory, and only use the proper type of disc accessory in good condition.
B
bbrownAug 9, 2025
What to do if my Hercules HE66 Grinder will not start?
- A
  Amanda CoxAug 9, 2025
  If your Hercules Grinder won't start, there are several potential causes: 1. Ensure the power cord is securely plugged in. 2. Check the power outlet. If there's no power, inspect the circuit breaker. If tripped, verify the circuit's capacity and ensure no other devices are overloading it. Turn off the grinder before checking the breaker. 3. If equipped, the tool's thermal reset breaker might have tripped. Turn off the grinder, let it cool down, and then press the reset button on the tool. 4. Internal damage or wear might be the issue. In this case, have a qualified technician service the tool.
K
Kathleen RoweAug 14, 2025
Why is my Hercules HE66 Grinder overheating?
- F
  fulleranthonyAug 15, 2025
  If your Hercules Grinder is overheating, consider these factors: 1. Avoid forcing the tool to work too quickly; allow it to operate at its own pace. 2. The motor housing vents might be blocked. Clear any dust from the motor using compressed air while wearing ANSI-approved safety goggles and a NIOSH-approved dust mask/respirator. 3. A long or small diameter extension cord could be straining the motor. Try eliminating the extension cord. If one is necessary, use a cord with the correct diameter for its length and load.
M
Misty WiseAug 19, 2025
Why does my Hercules Grinder operate slowly?
- G
  Gabriel JohnsAug 19, 2025
  If your Hercules Grinder operates slowly, it might be due to: 1. Applying too much pressure to the workpiece. Reduce the pressure and allow the tool to work at its own pace. 2. Using a long or small diameter extension cord, which can reduce power. Try using no extension cord. If you need one, make sure it has the right diameter for its length and load.
M
Mary HernandezAug 25, 2025
Why is my Hercules Grinder making excessive noise?
- D
  David ObrienAug 25, 2025
  If your Hercules Grinder is making excessive noise or rattling, it might be due to internal damage or wear. Have a technician service the tool.
C
cookpatriciaAug 29, 2025
Why does my Hercules HE66's performance decrease over time?
- C
  Colin MaloneAug 29, 2025
  If the performance of your Hercules Grinder decreases over time, it is likely due to worn or damaged carbon brushes. Have a qualified technician replace the brushes.

Hercules HE66 Specifications

General

Brand	Hercules
Model	HE66
Category	Grinder
Language	English

Summary

Hercules Angle Grinder Owner's Manual

Model HE66 Identification

Identifies the specific model number of the angle grinder.

Product Description: 7"-9" Angle Grinder

States the product type, size range, and power rating of the angle grinder.

Important Safety Information

General Power Tool Safety Warnings

Provides overarching safety guidelines applicable to all power tools.

Work Area Safety Guidelines

Covers safe practices for maintaining the work environment.

Electrical Safety Precautions

Details essential precautions related to electrical hazards and tools.

Personal Safety Measures

Outlines necessary personal protective measures and conduct during operation.

Power Tool Use and Care

General Use and Maintenance

Offers advice on how to properly use, maintain, and care for the power tool.

Service and Repair Procedures

Specifies requirements for servicing and repairing the power tool.

Common Safety Warnings for Specific Operations

Introduces safety warnings for grinding, sanding, wire brushing, and cutting.

Kickback and Related Warnings

Understanding and Preventing Kickback

Explains kickback phenomena and provides warnings to prevent it.

Specific Safety Warnings for Operations

Grinding and Abrasive Cutting-off Safety

Details safety precautions for grinding and abrasive cutting-off operations.

Abrasive Cutting-off Operations Safety

Provides specific safety instructions for abrasive cutting-off tasks.

Sanding Operations Safety

Outlines safety measures specific to sanding operations.

Wire Brushing Operations Safety

Covers safety guidelines for using wire brushes with the tool.

Vibration Safety

Reducing Vibration-Related Injury

Advises on reducing risks associated with tool vibration during use.

Electrical Grounding and Plug Types

Grounded Tools with Three Prong Plugs

Explains the use and importance of three-prong plugs for grounded tools.

Double Insulated Tools with Two Prong Plugs

Describes the features and use of double insulated tools with two-prong plugs.

Extension Cord Usage

Selecting and Using Extension Cords

Provides guidelines and recommendations for selecting and using extension cords.

Symbology and Warning Definitions

Tool Symbology Explanation

Explains the meaning of various symbols used on the tool and in the manual.

Warning Symbols and Definitions

Defines safety alert symbols (Danger, Warning, Caution, Notice) and their implications.

Tool Specifications and Description

Specifications Overview

Lists the electrical rating, rated speed, spindle thread, and accessory diameters.

Functional Description of Components

Identifies and labels the main components of the angle grinder.

Operation and Tool Setup

General Operation Instructions

Guides on how to safely operate the tool, including starting and stopping.

Tool Setup Procedures

Details essential setup steps before using the tool.

Adjusting the Wheel Guard

Explains how to properly adjust and secure the wheel guard for safety.

Installing Auxiliary Side Handle

Provides instructions for attaching the auxiliary handle for better control.

Accessory Installation

Installing Non-threaded Grinding/Cut-Off Wheels

Instructions for fitting non-threaded grinding or cut-off wheels.

Installing Threaded Accessories

Guidance for attaching threaded accessories like wire brushes or flap discs.

Workpiece and Work Area Setup

Preparing the Work Area and Workpiece

Covers preparing the work area and securing the workpiece for safe operation.

General Operation Procedures

Tool Starting and Stopping

Details how to start, stop, and use continuous operation features of the tool.

Trigger Lock and Controls

Explains the function of the trigger lock and how to operate the trigger.

Wheel/Disc Application Techniques

Provides guidance on applying wheels or discs for grinding, sanding, and cutting.

Maintenance and Servicing

Pre-Use Inspection Checklist

Lists items to check before each use to ensure tool safety and condition.

Cleaning and Lubrication Instructions

Instructions for cleaning the tool and maintaining its parts and lubrication.

Troubleshooting Guide

Common Problems and Solutions

Lists common problems, their possible causes, and suggested solutions.

Important Disclaimer for Service

Professional Repair Recommendation

States that repairs should be performed by qualified technicians.

Parts List and Diagram Information

Detailed Parts List

Provides a comprehensive list of all parts with their descriptions and quantities.

Assembly Diagram

Exploded View of Tool Components

Illustrates the exploded view of the tool with numbered parts for assembly reference.

Limited 90 Day Warranty

Warranty Terms and Conditions

Outlines the terms, conditions, and limitations of the product warranty.

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