How to Read a Saw Blade - Part II

A Practical Guide to Circular Saw Blade Design

With the fundamentals covered, we can now look at the advanced design features that shape how a saw blade performs. From position holes to slots, these elements explain why some blades cut quieter, last longer, and run more smoothly.

Additional Blade Features

Pin Holes / Mounting Holes / Keyway

These features provide machine-specific positioning, locking, and stability.

• Pin holes: Small holes around the bore used for secure fastening
• Mounting holes: Countersunk holes for bolts or screws that improve clamping stability
• Keyway: A square or shaped slot inside the bore that prevents slippage under high torque

How we make it better:
All positioning holes and keyways are laser-cut with high precision to ensure accurate alignment and repeatability.

How to Read Position Hole Information
．2/7/42 → 2 pin holes, Ø7 mm, on a 42 mm pitch circle
．12/16/310 (M16) → 12 countersunk holes, Ø16 mm, on a 310 mm circle, designed for M16 screws
．NL01 → Combination pattern: 2/7/42 + 2/9/46.4 + 2/10/60

Expansion Slots (with Copper Plugs)

Expansion slots allow thermal expansion during cutting, helping the blade dissipate heat. Copper plugs further absorb vibration and reduce the risk of blade warping or deformation.

How we make it better:
With more than 20 years of expertise, our engineers place expansion slots in the ideal locations and reinforce them with well-designed copper plugs for superior cutting stability.

Tensioning Ring

A tensioning ring strengthens the blade and keeps it flat and concentric during operation, minimizing vibration and preventing bending or warping in high-speed or heavy-duty applications.

How we make it better:
Golden Eagle’s experienced engineers precisely adjust each tensioning ring to ensure optimal dynamic balance. In addition to the visible surface ring, internal tension rings are added when required to achieve the best structural configuration.

Anti-Vibration Slots (with Damping Resin)

Laser-cut anti-vibration slots filled with high-quality damping resin reduce noise, suppress resonance, and ensure smoother cutting performance.

How we make it better:
Golden Eagle designs application-specific anti-vibration slots for each saw blade, enhancing rotational stability and reducing the risk of high-frequency vibration.