3M 7000044990 Microfinishing Film Roll 30 Micron 0.393 X 900 Ft

Product Description

The 3M 7000044990 is a precision microfinishing film roll engineered for tight-tolerance surface finishing on cylindrical workpieces. The abrasive layer uses aluminum oxide grains resin-bonded to a 5 MIL polyester film backing, delivering consistent cut and finish across long production runs. At 30 micron grade, this roll produces fine surface finishes suited to critical components where dimensional accuracy and surface texture directly affect performance. The polyester backing includes a friction grip coating on the reverse side to reduce slip during operation, keeping the film stable and predictable under load.

This roll is sized at 0.393 inches wide by 900 feet long with a 1 inch core, making it compatible with standard microfinishing equipment used in production and repair environments. Primary applications include precision finishing of automotive camshafts, crankshafts, and other hardened cylindrical shafts where surface finish specifications must be held to tight tolerances. Machinists, engine rebuilders, and precision grinding shops are the primary users. The roll format supports continuous feed setups on lapping and microfinishing machines common in automotive and industrial machine shops.

Key Features

• 30 micron aluminum oxide abrasive for fine, controlled material removal on hardened cylindrical surfaces
• Resin-bond construction keeps abrasive grains uniformly anchored to the 5 MIL polyester film backing
• Friction grip coating on the backing reduces slippage during machine-feed operations
• 900 foot roll length supports extended production runs without frequent changeovers
• 0.393 inch width and 1 inch core fit standard microfinishing and lapping machine tooling

Compatibility

Designed for use on microfinishing and lapping machines configured for cylindrical surface finishing, including applications on automotive camshafts and crankshafts. Confirm core diameter and film width compatibility with your specific machine before installation.

Installation Notes

Installation and operation of microfinishing film rolls should be performed by qualified machinists or toolroom personnel familiar with lapping and microfinishing equipment. Power down and de-energize the machine before threading or changing the film roll. Verify that the roll width, core size, and micron grade match the job specification and machine requirements before starting. Follow the equipment manufacturer's feed rate and pressure guidelines to avoid tearing the film or inducing chatter on the workpiece surface.

Technical Specifications

• Abrasive Mineral: Aluminum Oxide
• Grade: 30 Micron
• Backing Material: 5 MIL Polyester Film
• Roll Width: 0.393 inches
• Roll Length: 900 feet
• Core Diameter: 1 inch
• Bond Type: Resin
• Backing Feature: Friction Grip Coating
• Unit of Measure: Roll
• Minimum Order Quantity: 3
• UPC: 00051141206608

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000044990