3M™ Microfinishing Film Roll 372L

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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

Frequently viewed resources

Safety Data Sheet (PDF)

Overall Length (Imperial)

Overall Length (Metric)

Overall Width (Imperial)

Overall Width (Metric)

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Details

Highlights

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

The 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)

100

125

372L

Aluminum
Oxide

Type S

•

372L Type 2*
(colored)

Aluminum
Oxide

Type S

•

373L

Aluminum
Oxide

Type Q

•

373L Type 2*
(colored)

Aluminum
Oxide

Type Q

•

382L Type 2
(colored)

Aluminum
Oxide

Type S

•

362L

Aluminum
Oxide

Type S

•

272L**

Aluminum
Oxide

Type S

•

472L

Silicon
Carbide

Type S

•

675L

Diamond

Type S

•

Diamond

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.

Typical properties

Details

Abrasive Material	Aluminum Oxide
Application	Polishing, Finishing
Backing Material	Polyester Film, Film
Backing Thickness (Imperial)	5 mil
Bond Type	Resin
Brands	3M™
Core Size (Imperial)	0.625 in, 1 in, 1.5 in, 1.75 in, 3 in
Core Size (Metric)	15.875 mm, 25.4 mm, 38.1 mm, 44.45 mm, 76.2 mm
Core Type	Coreless, Cardboard, Plastic, Keyed
Equipment - Machines	Microfinishing Machines, Superfinishing Machines, Wide Belt Sanders, Centerless Grinders, Manual Backstand, Cylindrical Grinders
Industries	Composite, AOEM, Precision Grinding & Finishing, Transportation & Heavy Equipment, Primary Metal, Aerospace, General Industrial, Marine
Micron Grade	9 μm, 15 μm, 20 μm, 30 μm, 40 μm, 50 μm, 60 μm, 80 μm, 100 μm
Product Color	Green, Red, Orange, Black, Blue, Purple, Light Blue
Product Form	Roll
Roll Wind	ASO, ASI
Sub Applications	Plate Polishing, Superfinishing, Powertrain Microfinishing, Fine Finishing

Dimensions and Classifications

Overall Length (Imperial)	150 ft, 164 ft, 226 ft, 300 in, 328 ft, 330 ft, 560 ft, 590 ft, 623 ft, 650 ft, 656 ft, 900 ft, 900 ft
Overall Length (Metric)	45.72 m, 45.75 m, 50 m, 69 mm, 91.44 m, 91.5 m, 100 m, 100.5 m, 170.69 m, 179.832 m, 189.8904 m, 198 m, 199.949 m, 274.25 m, 22860 m
Overall Width (Imperial)	0.3 in, 0.394 in, 0.453 in, 0.472 in, 0.5118 in, 0.512 in, 0.571 in, 0.59 in, 0.63 in, 0.689 in, 0.7087 in, 0.709 in, 0.71 in, 0.728 in, 0.748 in, 0.787 in, 0.807 in, 0.906 in, 1.043 in, 1.142 in, 1.24 in, 1.73 in, 1.732 in, 1.85 in, 2.75 in, 4 in, 7.12 in, 8 in
Overall Width (Metric)	7.62 mm, 10 mm, 11.506 mm, 11.9888 mm, 12 mm, 12.99972 mm, 13 mm, 14.503 mm, 14.5034 mm, 14.986 mm, 16 mm, 16.002 mm, 17.5 mm, 18.00098 mm, 18.01 mm, 18.034 mm, 18.491 mm, 18.4912 mm, 19 mm, 19.9898 mm, 19.99 mm, 20 mm, 20.5 mm, 23.0124 mm, 26.49 mm, 29 mm, 31.5 mm, 43.942 mm, 43.9928 mm, 47 mm, 69.85 mm, 101.6 mm, 180.848 mm, 203.2 mm

Resources

3M™ Abrasive Products, 362L, 372L; Grades 9 Mic - 60 Mic

Safety Data Sheets

Document Number: MSDS_2371730_US_EN

(PDF)

Reviews

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Similar products

	Current product 3M™ Microfinishing Film Roll 372L	3M™ Microfinishing Film Roll 362L	3M™ Microfinishing Film Roll 373L	3M™ Microfinishing Film Roll 382L
Overall Width (Metric)	7.62 mm, 10 mm, 11.506 mm, 11.989 mm, 12 mm, 13 mm, 13 mm, 14.503 mm, 14.503 mm, 14.986 mm, 16 mm, 16.002 mm, 17.5 mm, 18.001 mm, 18.01 mm, 18.034 mm, 18.491 mm, 18.491 mm, 19 mm, 19.99 mm, 19.99 mm, 20 mm, 20.5 mm, 23.012 mm, 26.49 mm, 29 mm, 31.5 mm, 43.942 mm, 43.993 mm, 47 mm, 69.85 mm, 101.6 mm, 180.848 mm, 203.2 mm
Product Form	Roll
Overall Width (Imperial)	0.3 in, 0.394 in, 0.453 in, 0.472 in, 0.512 in, 0.512 in, 0.571 in, 0.59 in, 0.63 in, 0.689 in, 0.709 in, 0.709 in, 0.71 in, 0.728 in, 0.748 in, 0.787 in, 0.807 in, 0.906 in, 1.043 in, 1.142 in, 1.24 in, 1.73 in, 1.732 in, 1.85 in, 2.75 in, 4 in, 7.12 in, 8 in
Overall Length (Metric)	45.72 m, 45.75 m, 50 m, 69 mm, 91.44 m, 91.5 m, 100 m, 100.5 m, 170.69 m, 179.832 m, 189.89 m, 198 m, 199.949 m, 274.25 m, 22,860 m
Overall Length (Imperial)	150 ft, 164 ft, 226 ft, 300 in, 328 ft, 330 ft, 560 ft, 590 ft, 623 ft, 650 ft, 656 ft, 900 ft, 900 ft
Abrasive Material	Aluminum Oxide

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3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use. Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice. Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage. For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.