Overview
The 3M 366L PSA film abrasive disc features micron-graded aluminum oxide abrasive bonded to a durable polyester film backing to produce a fast cut-rate and uniform finish on wood, solid surface composites, plastic, fiberglass, paint prep, coating and corrosion removal, primer, e-coat, or metal. The 40-micron grade is ideal for intermediate finishing and sanding operations where balance between cut-rate and surface quality is required. The open coat construction provides aggressive cut and reduced loading, while a load-resistant coating prevents dust and debris from clogging the disc.
Key Features
- Premium, micron-graded aluminum oxide abrasive bonded to durable polyester film backing produces fast cut-rate and uniform finish
- Pressure sensitive adhesive (PSA) provides easy attachment, holds disc securely in place during use, and removes cleanly from backup pad
- Abrasive is resin-bonded and supports disc flexibility without sacrificing durability under high heat and pressure
- Polyester film backing flexes to achieve consistent finish over contours and offers greater tear-resistance than comparable paper products
- Load-resistant coating prevents dust and debris clogging, increasing efficiency and product life
- Film-backed discs provide superior tear resistance and consistency of finish
Technical Specifications
Grit Grade: 40 micron
Diameter: 5 inches
Hole Pattern: Non-Holed (NH)
Backing: Polyester Film
Abrasive Material: Aluminum Oxide, Micron-Graded
Adhesive System: Pressure Sensitive Adhesive (PSA)
Thickness: 3 mil polyester film
Coating: Anti-load / Open Coat
Quantity per Box: 50 discs
Part Number: 3M 05114 / 3M 366L 40 Mic
Type: Type D PSA Film Disc
Die Size: 500X
Typical Applications
- Fine sanding and finishing on ferrous and non-ferrous metals
- Paint prep and primer finishing
- Composite and fiberglass surface finishing
- Wood furniture and cabinetry finishing
- Coating and corrosion removal
- E-coat finish polishing
- Use with orbital and random orbital sanders
Compatibility & Replacements
Compatible With
- Orbital sanders with 5″ pad diameter
- Random orbital sanders with 5″ backing pad
- Standard 5″ sanding pads with PSA attachment
- Industrial finishing equipment using PSA film discs
Replaces / Drop-In Replacement For
The 3M 366L 40 micron PSA film disc serves as a direct replacement for discontinued or equivalent coated abrasive discs in the 40-micron finishing grade category. Verify exact compatibility with your existing equipment before ordering.
Works With
- PSA-compatible 5″ orbital sander backup pads
- Standard random orbital sanding equipment
- Industrial manufacturing and finishing systems requiring micron-graded abrasives
- Multi-step finishing processes combining various micron grades
