3M 7000044888 Microfinishing Film Roll 30 Micron 7-7/8x328ft

Product Description

The 3M 7000044888 is a microfinishing film roll designed for precision finishing of cylindrical surfaces in automotive and industrial applications. It features aluminum oxide abrasive grain resin-bonded to a 5 mil polyester film backing, delivering consistent cut and finish control across the full length of the roll. A friction grip coating on the backing reduces slippage during use, which is critical when working on rotating workpieces. At 30 micron grade, this roll is suited for fine stock removal and surface refinement where tight tolerances are required. The roll measures 7-7/8 inches wide by 328 feet long on a 3-inch core and weighs 15 pounds.

This microfinishing film roll is used in precision cylindrical grinding and superfinishing operations. Common applications include finishing automotive camshafts and crankshafts, where consistent surface finish and dimensional accuracy are essential. It is typically used on lapping machines, microfinishing machines, or fixture-mounted setups in production and rebuild shops. The polyester film backing provides dimensional stability under the tension and speed conditions typical in these operations.

Key Features

• Aluminum oxide abrasive resin-bonded to a 5 mil polyester film backing for dimensional stability
• 30 micron grade for fine stock removal and precision surface finishing
• Friction grip coating on backing reduces slippage on rotating workpieces
• 328-foot roll length reduces changeover frequency in production environments
• 3-inch core fits standard microfinishing machine spindles
• 7-7/8 inch width accommodates a range of cylindrical workpiece widths

Compatibility

Designed for use on microfinishing and lapping machines that accept 3-inch core rolls. Typical applications include precision finishing of automotive camshafts and crankshafts as stated by the manufacturer.

Installation Notes

Installation is performed by qualified machine operators or toolroom technicians familiar with microfinishing equipment. Ensure the machine is powered down and de-energized before loading or changing the film roll. Verify that the core diameter and roll width match the machine specifications before mounting. Follow the equipment manufacturer's guidelines for tension settings and feed rate to avoid film tearing or premature wear.

Technical Specifications

• Abrasive Mineral: Aluminum Oxide
• Backing Material: 5 mil Polyester Film
• Backing Coating: Friction Grip
• Grade: 30 Micron
• Roll Width: 7-7/8 inches
• Roll Length: 328 feet
• Core Size: 3 inches
• Unit of Measure: Roll
• Weight: 15 pounds

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000044888