Oregon 520-120 User Manual (English)

Questions and Answers:

D
David AndersonJul 27, 2025
What to do if my Oregon 520-120 Grinder vibrates abnormally?
- B
  bennettjeremyJul 28, 2025
  If your Oregon Grinder vibrates abnormally, stop using it immediately. The issue might stem from several causes: * The grinder isn't secured correctly, so check its attachment and tighten the securing screws. * The motor unit might not be correctly secured to the base unit; tighten the locking handle. * The vise assembly could be loose; tighten the vise adjustment knob. * The grinding wheel may not be correctly fitted; dismantle it, check its condition, and refit it correctly.
A
April HamiltonAug 7, 2025
Why won't my Oregon 520-120 start?
- J
  Jerome SteeleAug 7, 2025
  If your Oregon Grinder fails to start, it could be due to a tripped safety device (fuse, circuit breaker). Try resetting the safety device. If it trips again, stop using the grinder and contact a qualified technician. Alternatively, the machine might not be plugged in properly; unplug it and plug it in again correctly.
J
Jessica StevensAug 17, 2025
What to do if the lamp on my Oregon 520-120 fails to switch on?
- J
  John WilliamsAug 17, 2025
  If the lamp on your Oregon Grinder doesn't switch on, first ensure the lamp is screwed in properly. If it still doesn't work, the lamp may have blown and needs replacement.

Oregon 520-120 Specifications

General

Power Source	Electric
Power	1200 W
Disc Diameter	125 mm
No Load Speed	11000 RPM
Spindle Thread	M14

Summary

Product Identification and Safety Symbols

Names and Terms

Defines key terms used in the manual, such as 'Skilled Technician'.

Symbols and Labels

Explains the meaning of symbols and labels found on the tool and in the manual.

Safety Information and Precautions

General Safety Rules and Warnings

Essential safety guidelines and precautions for operating the grinder.

Safe Operation Practices and Environment

Covers safe use, environment, accessories, and avoiding specific hazards.

Electrical Safety, Grounding, and Extension Cords

Details electrical connection, grounding, and extension cord usage.

General Information and Technical Specifications

Operator's Manual and Safety Devices

Guidelines for manual usage and overview of safety devices.

Intended Use and Technical Data

Defines proper applications and lists detailed technical specifications.

Grinder Components Overview

Illustrated Part Identification

Lists and describes the grinder's main components and numbered parts.

Sharpening Angles and Measurements

Grinding Angles Chart

Details specific angles for sharpening different types of saw chains.

Instrumental Measurements for Sharpening

Instructions on measuring chain components for sharpening.

Preparing the Grinder for Operation

Mounting the Grinder Unit

Steps for securely mounting the grinder's base unit onto a bench or wall.

Assembly and Grinding Wheel Installation

Instructions for assembling parts and fitting the grinding wheel.

Wheel Maintenance and Initial Checks

Procedures for testing, removing, and reinstalling the grinding wheel and arbor shield.

Start-Up and Wheel Assembly Verification

Steps for starting the grinder and verifying the grinding wheel assembly.

Grinding Wheel Alignment and Dressing

Centering the Grinding Wheel

Detailed steps to align the grinding wheel precisely with the vise.

Checking and Dressing the Grinding Wheel

How to check and restore the grinding wheel's profile and shape.

Setting Saw Chain Sharpening Angles

General Sharpening Angle Warnings

Crucial safety warnings related to angle adjustments and sparks.

Right Hand Cutter Angle Settings

Instructions for setting angles for right-hand cutters (with and without down angle).

Left Hand Cutter Angle Settings

Instructions for setting angles for left-hand cutters (with and without down angle).

Chain Placement and Sharpening Preparation

Securing the Chain in the Vise

Guide on securing the saw chain in the grinder's vise.

Cutter Positioning and Depth Adjustment

Steps for adjusting the grinding depth and positioning the cutter.

Chain Sharpening Operation

Sharpening the Chain Procedure

Detailed steps for sharpening the saw chain cutters.

Sharpening Subsequent Cutters

Steps for sharpening subsequent cutters and advancing the chain.

Depth Gauge Setting Procedures

Grinding Wheel Dressing for Depth Gauge Setting

Instructions for dressing the grinding wheel to set the depth gauge.

Setting the Depth Gauge Correctly

Instructions on how to set the depth gauge for consistent cutter sharpening.

End of Use Procedures

Stopping, Shutting Down, and Cleaning

Procedures for safely stopping, shutting down, and cleaning the grinder.

Machine Disposal Information

Information on proper disposal methods for the machine.

Warranty and Customer Support

Warranty Validity and Claims Process

Details regarding warranty terms and how to make claims.

Oregon Customer Satisfaction Policy

Information about the manufacturer's warranty policy and customer satisfaction.

Troubleshooting Common Issues

Diagnosing and Resolving Common Problems

A guide to diagnose and resolve common problems encountered with the grinder.

Illustrated Parts List

Grinder Component Identification and Numbers

A detailed list of grinder parts with their corresponding numbers and descriptions.

Related product manuals

Oregon 520-120 User Manual

Table of Contents