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3M™ Microfinishing Film Roll 372L

10  Products
  • Micron-graded aluminum oxide abrasive cuts fast and provides a consistent, fine finish
  • Durable polyester film backing provides flexibility for consistent finishing on contoured surfaces
  • Polyester film backing can be run wet
  • Available in a range of grades to help operators achieve goal tolerances
 More...
Width
Micron Grade
10 Products Available
Available options:
 Width and Micron Grade
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Specifications
Attribute Name
Value
Application
Finishing
Application Category
Finishing/Polishing
Backing Material
Polyester Film
Backing Weight
5MIL
Brand
3M™
Color
Black, Blue, Green, Orange, Purple, Black, Green, Light Blue, Orange, Purple
Core Size
3 in
Core Size (metric)
76.2 mm
Equipment - Machines
Microfinishing Machines, Superfinishing Machines
For Use On
All Metals, Hard-Filled Rubber, Plastics, Soft Rubber
Industries
Aerospace, AOEM, General Industrial, Marine, Precision Grinding & Finishing, Primary Metal, Transportation & Heavy Equipment
Length
150 Foot
Length (Metric)
45.72 m
Micron Grade
100 μm, 15 μm, 30 μm, 50 μm, 60 μm, 80 μm, 9 μm
Mineral Type
Aluminum Oxide
Primary Application
Metalworking
Product Form
Roll
Substrate
All Metals, Hard-Filled Rubber, Plastics, Soft Rubber
Width
4 in, 8 in
Width (Metric)
101.6 mm, 203.2 mm
Product Details
  • Micron-graded aluminum oxide abrasive cuts fast and provides a consistent, fine finish
  • Durable polyester film backing provides flexibility for consistent finishing on contoured surfaces
  • Polyester film backing can be run wet
  • Available in a range of grades to help operators achieve goal tolerances
  • Color-coded by grade for error proofing

Our 3M™ Microfinishing Film Roll 372L features micron-graded premium aluminum oxide bonded to a 5 mil polyester film backing to deliver uniform results and meet stringent surface requirements. A friction grip coating provides slip resistance for microfinishing machines where film slippage is an issue, and close tolerance work on cylindrical surfaces, such as automotive camshafts and crankshafts.

Predictable, Consistent, Repeatable Performance
In order to achieve an extremely consistent scratch for microfinishing, we use micron-graded mineral, measured at a very tight size tolerances for 3M™ Microfinishing Film Roll 372L. The resin bond ensures reliable, consistent performance. With a durable film backing, the abrasive helps achieve tight geometry and finish tolerances.

This microfinishing roll comes in a broad range of micron grades to achieve reproducible surface characteristics and geometric values that adhere to specification. In some applications, numerous grades are run simultaneously to achieve finishes that differ across the surface of a single complex part. To reduce risk of operator error, we designed Type 2 film in a range of colors — reflective of each grade. The color coding is a useful visual cue, as is sorting width by core size and side and end of roll printing and marking.

3M™ Microfinishing Films
Product Mineral Backing Caliper
(0.001")
Backside Grades (Microns)
9 15 20 30 40 45 50 60 74 80 100 125
372L Aluminum
Oxide
5 Type S      
372L Type 2*
(colored)
Aluminum
Oxide
5 Type S          
373L Aluminum
Oxide
5 Type Q      
373L Type 2*
(colored)
Aluminum
Oxide
5 Type Q          
382L Type 2
(colored)
Aluminum
Oxide
6 Type S              
362L Aluminum
Oxide
3 Type S          
272L** Aluminum
Oxide
5 Type S      
472L Silicon
Carbide
5 Type S              
675L Diamond 5 Type S                
Diamond 6 Type S                    

*Suggest to specify the 372L or 373L type 2 (colored) film whenever possible to assist with Error-proofing.
**European Lead Product. Plus wide rolls and belts globally.

Film Backing Provides Uniformly Flat Vehicle for Finer Finish
Film backings provide a superior, uniformly flat surface to hold abrasive particles — abrasive grains don't compress or become pressed into the backing. Highly conformable and tear-resistant, the polyester film backing flexes to help achieve a consistent finish over contours and is stronger than comparable paper products, making it ideal for high-production environments.

For Flawless Geometries
Manufacturers of critical automotive components have little room for error in producing parts to specification. Power generation, life, noise, vibration and friction, fuel efficiency and emissions are all tied to the finishes of crankshafts and camshafts that rotate on increasingly thinner films of oil.

Engine component surfaces and geometry can be improved by using microfinishing which removes variations in the surface, minimizes friction and manipulates metal behavior in other ways.

Learn about 3M™ Microfinishing Film Products. (PDF, 373.73 Kb)

Recommended Applications
3M™ Microfinishing Films are used in the production of industrial components such as custom flanges and fittings for the oil and gas industry, as well as superfinishing of automotive parts, like crankshafts, camshafts and transmission parts.

Learn more about Metalworking solutions. (PDF, 12.95 Mb)

A Portfolio of Abrasive Systems Solutions
From specialty abrasives designed for a highly specific purpose to versatile, jack-of-all-trades sheets, you can find an abrasive tool to accomplish your task or perfect your system. At 3M, we draw from a wealth of original technologies and breakthrough inventions to provide a broad portfolio of abrasives that shape, finish and polish with ease and precision.

Customer Reviews
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Large Volume Order

If you are considering a large purchase of this or other 3M Abrasive products our inside sales team is ready to help by providing additional information and options that our industrial customers typically seek when making abrasive procurement decisions. Our technical expertise, customer support, and global capabilities put us in a unique position to address your biggest challenges, and we’ll do our best to prove that we should be your abrasive supplier of choice.


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