TS 420 STIHL 14" Cutquik Saw

STIHL TS cut-off saw

The STIHL TS 420 is a versatile, professional-grade gas-powered cut-off saw widely used for cutting concrete, asphalt, masonry, and even some metals, with a maximum blade diameter of 14 inches that allows for a cutting depth of roughly five inches per pass depending on the material; concrete, asphalt, and brick typically allow near the full depth, whereas steel or other metals may require multiple passes due to blade limitations. To ensure optimal performance, the saw must be maintained properly, including regular inspection and replacement of the air filter, spark plug, and blade, as well as using the correct 50:1 gas-to-oil fuel mix, because neglecting these can lead to engine starting issues, stalling, poor cutting performance, or overheating. Common troubleshooting tips include checking the spark plug if the engine fails to start, cleaning or replacing a clogged air filter if it dies after starting, ensuring the blade is correctly mounted and sharp to avoid vibration and poor cutting, and adjusting the carburetor or cleaning the muffler if smoke appears from the exhaust. For efficient use, operators should hold the saw with both hands, let the engine reach full RPM before beginning a cut, and perform slow, steady passes rather than forcing the blade through material, using wet cutting when possible to reduce dust and extend blade life. Regular maintenance such as cleaning the cooling fins, monitoring blade wear, and inspecting guards not only ensures safety but also maximizes efficiency and longevity of the saw, making it a reliable tool for demanding construction or demolition tasks.

Thickness Capabilities

The STIHL TS 420 is a gas-powered cut-off saw, commonly used for construction, concrete, asphalt, and metal cutting. Its cutting capacity depends on the blade/disc you attach:

• Max blade diameter: 14 inches (350 mm)
• Typical cutting depth: ~5 inches (125 mm) per pass with a standard 14” blade
• Material-specific guidance:
  • Concrete/asphalt: 4–5 inches per pass
  • Steel/metal: depends on blade type; usually 1–2 inches per cut, often in multiple passes
  • Masonry/brick: up to ~5 inches

Pro tip: Never force the saw through the material; let the blade do the work. Overloading reduces lifespan and can be dangerous.

Easy Troubleshooting Tips

Here are common issues with the TS 420 and quick fixes:

Pro tip: Regular maintenance (air filter, spark plug, carburetor cleaning, fuel mix) prevents most issues.

How to Use for Best Efficiency

a. Setup

• Inspect blade: no cracks, proper seating
• Check fuel and oil: 50:1 gas-to-oil ratio
• Ensure guards and water supply (if wet cutting) are working

b. Cutting Technique

• Use both hands and maintain a firm stance
• Start the saw and let it reach full RPM before cutting
• Do slow, steady passes; don’t push aggressively
• For deep cuts, make multiple passes instead of forcing one cut

c. Maintenance for Efficiency

• Clean air filter every 5–10 hours of use
• Sharpen or replace blades when dull
• Check spark plug periodically; replace if worn
• Clean cooling fins to prevent overheating

d. Safety and Efficiency Tips

• Always wear PPE: goggles, gloves, hearing protection
• Use wet cutting whenever possible: reduces dust, extends blade life
• Avoid cutting too deep in one pass, this prevents engine strain

Summary for Optimal Use :

• Max thickness: ~5 inches with a 14” blade
• Keep the saw clean and well-maintained
• Use steady, controlled cutting technique
• Choose the right blade for material
• Troubleshoot with the simple steps above to keep downtime minimal