3M 7000027557 Lapping Film Roll 40.0 Micron 4x150ft

Product Description

The 3M 7000027557 is a precision lapping film roll engineered for controlled material removal and surface finishing in demanding applications. It features aluminum oxide mineral uniformly coated onto a 3 mil polyester film backing using a durable resin bond system. The film measures 4 inches wide by 150 feet long and fits a 3-inch core. At 40.0 micron grade, this roll delivers consistent scratch patterns suited to intermediate finishing steps where dimensional accuracy and surface uniformity are critical. Technicians and finishing specialists rely on this product where repeatable, grade-specific abrasion is required.

This lapping film is commonly used in fiber optic connector end-face finishing and roll superfinishing operations. Fiber optic technicians use it during polishing sequences to prepare ferrule end faces to low-reflectance specifications. It also sees use in precision roll finishing environments where tight surface finish tolerances are maintained on cylindrical components. The roll format supports both manual and machine-driven finishing setups, making it adaptable across bench and production-line contexts.

Key Features

• Aluminum oxide mineral provides consistent, controlled cut rate at 40.0 micron grade
• 3 mil polyester film backing resists tearing and conforms to precision finishing fixtures
• Durable resin bond system maintains mineral adhesion through extended finishing cycles
• Roll format supports continuous feed in automated or semi-automated finishing equipment
• Available across 7 grades from 0.05 to 60.0 micron for multi-step finishing sequences

Compatibility

Designed for use in fiber optic finishing polishing sequences and roll superfinishing operations requiring a 40.0 micron aluminum oxide lapping film on a 3-inch core roll.

Installation Notes

This product is handled and installed by fiber optic technicians, precision grinding specialists, or equipment maintenance personnel. Before loading film onto polishing or lapping equipment, ensure the machine is powered down and all rotating components have come to a full stop. Secure the roll onto the core mandrel per equipment manufacturer guidelines and verify film tension settings before resuming operation. Avoid contact between the abrasive surface and any unintended workpiece or fixture to prevent premature wear or surface contamination.

Technical Specifications

• Mineral Type: Aluminum Oxide
• Film Backing Thickness: 3 mil polyester
• Grade: 40.0 micron
• Roll Width: 4 inches
• Roll Length: 150 feet
• Core Size: 3 inches
• Unit of Measure: Roll
• Minimum Order Quantity: 4
• Weight: 0.95 pounds
• UPC: 00051111496954

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000027557