Oregon 620-120 Chainsaw Sharpener Review (5 Pro Tips)

Flooring, in its myriad forms, is more than just a surface we walk on; it’s a canvas upon which we build our lives. The selection, preparation, and maintenance of wood, whether for flooring or firewood, shares a common ancestor: the tree. And the chainsaw, in particular the Oregon 620-120, becomes our brush, shaping the raw material into something useful and beautiful.

Oregon 620-120 Chainsaw Sharpener Review (5 Pro Tips)

As someone who’s spent countless hours felling trees, bucking logs, and splitting wood, I understand the critical importance of a sharp chainsaw. A dull chain isn’t just inefficient; it’s dangerous. It can lead to kickback, requiring more effort and increasing the risk of accidents. That’s why a reliable chainsaw sharpener is an indispensable tool. I’ve used various sharpeners over the years, from manual files to electric grinders, and the Oregon 620-120 has consistently impressed me with its ease of use and precision. This review will delve into my experiences with this sharpener, sharing five pro tips to get the most out of it.

Why a Chainsaw Sharpener Matters

Before diving into the specifics of the Oregon 620-120, let’s address why sharpening your chainsaw is so crucial. The sharpness of your chain directly impacts:

• Cutting Efficiency: A sharp chain cuts faster and cleaner, reducing the time and effort required for each task.
• Safety: A dull chain is more likely to bind, kick back, or require excessive force, increasing the risk of injury.
• Chainsaw Longevity: Using a sharp chain reduces strain on the chainsaw engine, extending its lifespan.
• Wood Quality: A sharp chain produces cleaner cuts, which is particularly important for woodworking projects or firewood preparation.

I remember one instance where I was cutting firewood with a noticeably dull chain. I struggled to get through even small logs, and the saw kept jumping and vibrating. After finally sharpening the chain, the difference was night and day. The saw sliced through the wood effortlessly, and I finished the job in a fraction of the time. This experience reinforced the importance of regular sharpening.

Unboxing and Setup: First Impressions

The Oregon 620-120 Chainsaw Sharpener typically comes in a sturdy box containing the sharpener unit, grinding wheels of various sizes, dressing stone, guide bushings and detailed instruction manual. My initial impression was that it was a well-built, robust piece of equipment. The cast aluminum base provides stability, and the adjustable grinding head allows for precise sharpening angles.

Technical Specifications:

• Motor: 120V, 60Hz, 85W
• Grinding Wheel Size: Typically includes 5/32″, 3/16″, and 7/32″ wheels
• Sharpening Angles: Adjustable from 0 to 35 degrees
• Lighting: Integrated work light
• Weight: Approximately 14 lbs

Setup Steps:

1. Mounting: Secure the sharpener to a workbench or stable surface using the pre-drilled mounting holes.
2. Wheel Installation: Select the appropriate grinding wheel size for your chain and install it according to the manual’s instructions. Ensure the wheel is properly secured.
3. Angle Adjustment: Adjust the sharpening angle to match the manufacturer’s specifications for your chainsaw chain. This information is usually found in the chainsaw’s owner’s manual.
4. Depth Adjustment: Set the depth of the grinding wheel to ensure consistent sharpening of each tooth.
5. Lighting: Turn on the integrated work light to improve visibility during the sharpening process.

Important Note: Always wear safety glasses and gloves when using a chainsaw sharpener.

Pro Tip #1: Mastering the Angle Adjustment

The angle adjustment on the Oregon 620-120 is crucial for achieving a precise and effective sharpening job. Incorrect angles can lead to dull edges, uneven tooth wear, and even chain damage.

Understanding Angles:

• Top Plate Angle: The angle of the top cutting edge of the tooth. This angle typically ranges from 55 to 65 degrees, depending on the chain type.
• Side Plate Angle: The angle of the side cutting edge of the tooth. This angle is usually around 10 degrees.
• Depth Gauge Setting: The height difference between the cutting edge and the depth gauge (raker). This setting determines how much wood the chain removes with each pass.

Practical Steps:

1. Consult the Manual: Refer to your chainsaw’s owner’s manual for the recommended sharpening angles for your specific chain.
2. Use a Protractor: Use a protractor to accurately measure the sharpening angles on a new chain. Record these measurements for future reference.
3. Adjust the Sharpener: Loosen the angle adjustment knobs on the sharpener and set the angles according to your measurements. Tighten the knobs securely.
4. Test the Angle: After sharpening a few teeth, visually inspect the cutting edges. The edges should be sharp and uniform.
5. Fine-Tune: If the edges are not sharp or uniform, make small adjustments to the angle settings and repeat the process.

Data Point: A study by Oregon Tool found that using the correct sharpening angles can increase chain lifespan by up to 25%.

Personal Experience: I once sharpened a chain with the wrong top plate angle, resulting in a chain that cut very aggressively but dulled quickly. After correcting the angle, the chain cut smoothly and held its edge much longer.

Pro Tip #2: Choosing the Right Grinding Wheel

The Oregon 620-120 comes with a selection of grinding wheels, each designed for different chain sizes and tooth profiles. Using the wrong wheel can damage the chain or result in a poor sharpening job.

Wheel Selection Guide:

• 5/32″ Wheel: For smaller chains with narrow teeth, typically found on smaller chainsaws.
• 3/16″ Wheel: For medium-sized chains with standard teeth, commonly used on mid-range chainsaws.
• 7/32″ Wheel: For larger chains with wider teeth, often found on professional-grade chainsaws.

Material Considerations:

• Aluminum Oxide Wheels: Suitable for general-purpose sharpening of most chainsaw chains.
• Diamond Wheels: Ideal for sharpening carbide-tipped chains, which are more durable but require specialized sharpening tools.

Best Practices:

1. Consult the Manual: Refer to the sharpener’s manual for guidance on selecting the appropriate grinding wheel for your chain.
2. Match the Wheel to the Chain: Visually compare the grinding wheel to the chain teeth. The wheel should fit comfortably within the tooth gullet without being too large or too small.
3. Use a Dressing Stone: Regularly dress the grinding wheel with a dressing stone to remove any buildup and maintain a clean, sharp cutting surface.
4. Replace Worn Wheels: Replace grinding wheels when they become worn or damaged. Using a worn wheel can result in uneven sharpening and increased risk of damage.

Technical Limitation: Using a grinding wheel that is too large for the chain can damage the tooth gullet and weaken the chain.

Pro Tip #3: Mastering the Sharpening Technique

The actual sharpening process requires a steady hand and a consistent technique. Rushing through the process or applying too much pressure can damage the chain and reduce its lifespan.

Step-by-Step Guide:

1. Secure the Chain: Place the chain in the sharpener’s vise and secure it tightly.
2. Position the Grinding Wheel: Lower the grinding wheel into the tooth gullet until it makes contact with the cutting edge.
3. Sharpening Stroke: Gently move the grinding wheel back and forth along the cutting edge, following the contour of the tooth. Apply light pressure and avoid overheating the metal.
4. Consistent Strokes: Use the same number of strokes and the same amount of pressure for each tooth to ensure consistent sharpening.
5. Advance the Chain: After sharpening a tooth, advance the chain to the next tooth and repeat the process.
6. Check for Sharpness: After sharpening all the teeth, check the cutting edges for sharpness. The edges should be clean, sharp, and uniform.

Important Considerations:

• Coolant: Some sharpeners use coolant to prevent overheating the chain. If your sharpener uses coolant, ensure it is properly filled and maintained.
• Overheating: Avoid overheating the chain during sharpening. Overheating can weaken the metal and reduce its lifespan.
• Burrs: After sharpening, remove any burrs from the cutting edges using a fine file or honing stone.

Data Point: A study by Stihl found that using a consistent sharpening technique can improve cutting performance by up to 15%.

Personal Experience: I once overheated a chain while sharpening, causing the metal to turn blue. The chain became brittle and broke after only a few cuts. This experience taught me the importance of using light pressure and avoiding overheating.

Pro Tip #4: Depth Gauge (Raker) Maintenance

The depth gauges, also known as rakers, play a crucial role in controlling the amount of wood the chain removes with each pass. If the depth gauges are too high, the chain will not cut effectively. If they are too low, the chain will grab and kick back.

Understanding Depth Gauges:

• Function: Depth gauges limit the depth of cut, preventing the chain from digging too deeply into the wood.
• Height: The height of the depth gauges should be slightly lower than the cutting edges of the teeth.
• Adjustment: The depth gauges can be adjusted using a depth gauge tool and a flat file.

Adjustment Procedure:

1. Inspect the Depth Gauges: Visually inspect the depth gauges to ensure they are uniform in height.
2. Use a Depth Gauge Tool: Place a depth gauge tool over the chain, aligning it with the depth gauges.
3. File Down High Gauges: Use a flat file to file down any depth gauges that protrude above the tool.
4. Maintain Uniformity: Ensure that all depth gauges are filed down to the same height.
5. Round the Edges: Use a rounding file to round the edges of the depth gauges, preventing them from catching on the wood.

Technical Requirement: The depth gauge setting should be adjusted according to the manufacturer’s specifications for your chainsaw chain.

Practical Tip: After filing down the depth gauges, use a piece of sandpaper to smooth the surfaces and remove any sharp edges.

Case Study: In a project involving felling large oak trees, I found that adjusting the depth gauges properly significantly improved the chain’s cutting efficiency. The chain cut more smoothly and required less effort, reducing fatigue and increasing productivity.

Pro Tip #5: Proper Chainsaw Maintenance

Sharpening is only one aspect of chainsaw maintenance. To keep your chainsaw running smoothly and safely, it’s essential to perform regular maintenance tasks.

Maintenance Checklist:

• Chain Lubrication: Ensure the chain is properly lubricated at all times. Use a high-quality bar and chain oil.
• Air Filter Cleaning: Clean the air filter regularly to prevent dust and debris from entering the engine.
• Spark Plug Inspection: Inspect the spark plug regularly and replace it if necessary.
• Fuel System Maintenance: Use fresh fuel and stabilize it if storing the chainsaw for extended periods.
• Bar Maintenance: Clean the bar regularly and check for wear or damage.
• Chain Tension: Maintain proper chain tension to prevent the chain from derailing or binding.

Safety Precautions:

• Personal Protective Equipment (PPE): Always wear appropriate PPE, including safety glasses, gloves, hearing protection, and chaps.
• Kickback Awareness: Be aware of the risk of kickback and use proper cutting techniques to avoid it.
• Safe Cutting Practices: Follow safe cutting practices, including maintaining a firm grip on the chainsaw and keeping your feet firmly planted.
• Emergency Preparedness: Be prepared for emergencies by having a first-aid kit and knowing how to contact emergency services.

Industry Standard: OSHA regulations require employers to provide training and PPE to employees who operate chainsaws.

Personal Experience: I once neglected to clean the air filter on my chainsaw, causing the engine to overheat and lose power. After cleaning the filter, the chainsaw ran like new. This experience highlighted the importance of regular maintenance.

Troubleshooting Common Issues

Even with proper sharpening and maintenance, you may encounter issues with your chainsaw. Here are some common problems and their solutions:

• Chain Dullness: If the chain dulls quickly, check the sharpening angles and technique. Ensure you are using the correct grinding wheel and applying light pressure.
• Chain Slippage: If the chain slips off the bar, check the chain tension and bar condition. Adjust the tension and replace the bar if it is worn or damaged.
• Engine Problems: If the engine is difficult to start or runs poorly, check the spark plug, air filter, and fuel system. Clean or replace these components as needed.
• Vibration: Excessive vibration can indicate a loose chain, damaged bar, or engine problem. Tighten the chain, inspect the bar, and address any engine issues.
• Kickback: If the chainsaw kicks back, stop cutting immediately and assess the situation. Ensure you are using proper cutting techniques and wearing appropriate PPE.

Data Point: A survey of chainsaw users found that poor maintenance is the leading cause of chainsaw failure.

Alternatives to the Oregon 620-120

While I’m a fan of the Oregon 620-120, it’s not the only chainsaw sharpener on the market. Here are a few alternatives to consider:

• Stihl USG Universal Chainsaw Sharpener: A high-end option known for its precision and durability.
• Granberg Bar-Mount Chain Sharpener: A portable option that attaches directly to the chainsaw bar.
• Manual Filing Kits: A more affordable option that requires more skill and effort.

Comparison Table:

Advanced Techniques: Beyond the Basics

For those looking to take their chainsaw sharpening skills to the next level, here are some advanced techniques to consider:

• Custom Grinding: Experiment with different grinding wheel shapes and angles to optimize the chain for specific cutting tasks.
• Carbide Chain Sharpening: Learn how to sharpen carbide-tipped chains using specialized diamond wheels.
• Chain Repair: Learn how to repair damaged chains by replacing broken or worn teeth.
• Chain Optimization: Optimize the chain for different types of wood, such as hardwoods, softwoods, or frozen wood.

Technical Detail: Custom grinding can improve cutting performance by up to 20%, but it requires a deep understanding of chain dynamics and cutting mechanics.

Safety Codes and Regulations

Operating a chainsaw involves inherent risks, and it’s essential to be aware of and comply with relevant safety codes and regulations.

• OSHA Standards: The Occupational Safety and Health Administration (OSHA) sets standards for chainsaw safety in the workplace.
• ANSI Standards: The American National Standards Institute (ANSI) develops voluntary standards for chainsaw safety.
• Local Regulations: Check with your local authorities for any specific regulations regarding chainsaw use in your area.

Key Safety Requirements:

• Training: Operators must be properly trained in safe chainsaw operation.
• PPE: Operators must wear appropriate PPE, including safety glasses, gloves, hearing protection, and chaps.
• Safe Work Practices: Operators must follow safe work practices, including maintaining a safe distance from others and avoiding overhead hazards.

Legal Implication: Failure to comply with safety codes and regulations can result in fines, penalties, and legal liability.

Sourcing Materials and Tools Globally

Sourcing high-quality materials and tools can be a challenge, especially in certain regions. Here are some tips for sourcing materials and tools globally:

• Online Retailers: Use reputable online retailers to purchase chainsaws, sharpeners, and accessories.
• Local Dealers: Support local dealers who can provide expert advice and service.
• International Shipping: Be aware of import duties, taxes, and shipping costs when ordering from international suppliers.
• Quality Control: Inspect all materials and tools carefully upon arrival to ensure they meet your standards.

Common Challenges:

• Availability: Certain materials and tools may be difficult to find in some regions.
• Cost: Prices can vary significantly depending on the supplier and location.
• Quality: Quality can vary, so it’s essential to choose reputable suppliers.
• Shipping: Shipping can be expensive and time-consuming, especially for international orders.

Practical Solution: Consider forming a cooperative with other woodworkers or loggers to pool resources and purchase materials and tools in bulk.

Conclusion: Sharpening Your Skills and Your Chainsaw

The Oregon 620-120 Chainsaw Sharpener is a valuable tool for anyone who uses a chainsaw regularly. By mastering the angle adjustment, choosing the right grinding wheel, perfecting your sharpening technique, maintaining the depth gauges, and performing regular chainsaw maintenance, you can keep your chain sharp, your chainsaw running smoothly, and your work safe and efficient. Remember, a sharp chainsaw is not only more productive but also safer. So, invest the time and effort to sharpen your skills and your chainsaw, and you’ll reap the rewards for years to come. Just like a skilled artist meticulously sharpens their tools, we too must hone our equipment and knowledge to create our own masterpieces from the forest’s bounty.

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