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How To Choose Summa T Series 390-534 390-550 390-551 390-560 Carbide Tangential Blades And Usage Tip

When choosing a Summa T Series Carbide Tangential Blade (like the 390-534, 390-550, 390-551, or 390-560), the key is to match the blade to your material type, thickness, and desired cutting precision. Each blade has specific characteristics in terms of angle and application.

Overview of Each Blade
| Blade Model | Angle | Ideal For | Key Features |
|------------|--------|-----------------------------------------------|-------------------------------------------------------------|
| 390-534 | 36° | Standard vinyl, thin films | General-purpose blade for common cutting tasks |
| 390-550 | 45° | Thicker vinyl, reflective materials | Steeper angle for tougher materials |
| 390-551 | 60° | Sandblast stencil, thick media | Very steep angle for hard/thick materials |
| 390-560 | 36° | Textiles, window tint | Specialized for softer or delicate materials |
How to Choose the Right Blade
1. Material Type:
-Standard Vinyl, Fluorescents → Use 390-534 (36°)
-Reflective or Metallic Film → Use 390-550(45°)
-Sandblast Stencil, Cardboard, Rubber → Use 390-551 (60°)
-Textiles, Tint Film, Delicate Media → Use 390-560 (36° but optimized for soft)
2. Material Thickness:
- < 0.25 mm (0.01") → 36° blade
- 0.25 mm – 0.5 mm (0.01–0.02") → 45° blade
- > 0.5 mm (0.02")** or rigid → 60° blade
3. Cutting Detail Required:
- More intricate cuts = shallower angle (36°)
- Stronger cuts (less detail) = steeper angle (45° or 60°)
Usage Tips
- Blade Depth: Set the blade so it just barely scores the backing paper. Too deep = fast wear & poor cuts.
- Cutting Strip: Keep it clean and undamaged—this affects cut quality!
- Blade Holder Maintenance: Clean regularly and ensure bearings move smoothly.
- Speed & Force Settings:
- Start with manufacturer’s recommended settings.
- Do a test cut first.
- Adjust force if corners lift or lines aren’t clean.
Maintenance Tips
- Clean the blade tip regularly (especially after cutting adhesives).
- Rotate or replace the cutting strip if you notice inconsistent cut depths.
- Store unused blades in a dry, dust-free place to avoid corrosion.