Precision Redefined: Diamond Lapping Film Technology
Engineered for professionals demanding flawless surface finishes, our diamond lapping films combine micron-graded synthetic diamond particles with durable 3 mil polyester backing. This synergy delivers unmatched cutting consistency across metals, ceramics, and composites.
Core Advantages
- Predictable Performance: Uniform diamond distribution eliminates uneven wear
- Adaptive Backing: 75μm polyester balances flexibility with tear resistance
- Configuration Options: PSA adhesive, magnetic, or plain backing for diverse tooling
- Extended Lifespan: 3-5x longer service life than conventional abrasives
Technical Specifications
| Form |
Standard Sizes |
Backing Options |
| Discs |
Ø 3" / 5" / 6" / 8" / 12" |
Plain, PSA, Magnetic |
| Sheets |
8.5" × 11" / 9" × 11" / Custom cut |
Plain, PSA |
| Rolls |
Width: 4"–12", Length: up to 50 m |
Plain, PSA |
Micron-to-Grit Conversion Chart
| Micron |
Approx. Grit (FEPA) |
Application Stage |
| 45 μm |
320 grit |
Heavy stock removal |
| 30 μm |
600 grit |
Ferrule shaping / pre-polish |
| 15 μm |
1000 grit |
Mid-stage finishing |
| 9 μm |
1800 grit |
Geometry correction |
| 6 μm |
2500 grit |
Fine finishing |
| 3 μm |
5000 grit |
Pre-final polish |
| 1 μm |
12000 grit |
Final polishing |
| 0.5 μm |
> 20000 grit |
Optical-grade finish |
Mastering Lapping Film Applications
Industry-Specific Solutions
Medical Device Manufacturing: Achieve Ra <0.1μm finishes on surgical tools using 1μm diamond film sheets with PSA backing for secure mounting on flat laps.
Optics Production: Our 0.5μm diamond polishing film eliminates subsurface damage in fused silica when used with colloidal silica lubricant at 50-70 RPM.
Step-by-Step Usage Guide
- Surface Preparation: Degrease substrate with isopropyl alcohol before initial coarse grinding (45-30μm)
- Progressive Polishing: Advance through 3-4 grit stages, reducing pressure by 30% with each transition
- Optimal Parameters: Maintain 0.5-1.5 lbs/in² pressure and 100-300 SFPM speed for most metals
- Cleaning Protocol: Use ultrasonic cleaner with DI water between grit changes
Troubleshooting Common Issues
Problem: Uneven Wear Patterns
Solution: Verify lapping plate flatness (≤0.0005"/in) and redistribute pressure points. Rotate workpiece 90° every 2 minutes when using diamond film discs.
Problem: Premature Clogging
Solution: Apply 2-3 drops of diamond extender fluid per square inch when processing soft materials like copper. Increase lubricant viscosity for sub-micron work.
Selecting Your Ideal Diamond Film
Material Considerations: Harder alloys (HRC >50) require 6-9μm films for initial smoothing, while softer metals benefit from 15-30μm diamond particles.
Backing Selection: Magnetic-backed diamond film discs excel in automated systems, while PSA sheets provide quick changeovers for manual operations.
Economic Factors: For high-volume production, consider 12" diamond lapping film rolls - they offer 40% lower cost per square inch versus precut discs.