3M™ Diamond Microfinishing Film Roll 669L
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Details
Highlights
- Micron-graded diamond mineral delivers close tolerance precision finishes for medium stock removal
- Enables slow abrasive feed rates and fewer steps which reduces abrasive costs
- Durable 4mil Polyester film backing allows roll to be used dry or wet with surface lubricants
- An exceptional roll for thermal spray finishing of contour / complex shapes
- Color coded to reduce the risk of error and mixing up abrasive grades
Designed with a strong polyester film backing and sharp diamond mineral, the 3M™ Diamond Microfinishing Film Roll 669L delivers fine finishes on hard metals like thermal spray coating, ceramics, carbides, chilled iron and granite.
High-quality Materials for Micro-finishing 3M™ Diamond Microfinishing Film Roll 669L securely anchors micron-graded diamonds to a polyester film backing. Known for its strength and resilience, the polyester film backing keeps the abrasive from skidding or deflecting when run. The belts are also color coded by grade to help you reduce the risk of selecting the wrong grade. Waterproof Backing Polyester film backings are also water resistant, so the abrasive may be run with a wet surface lubricant, which helps wash away unwanted swarf and debris and keeps the abrasive running cool. When used in roll form for a process like superfinishing, our 669L roll enables slow abrasive feed rates and requires fewer steps, because of its durability, which in turn can reduce costs. Tips for Achieving Desired Roughness Average Many micro-finished products require a specific Ra, or roughness average. To obtain the desired Ra when applying thermal spray coatings, we recommend following a unique sequence of steps tailored to the substrate. A Ra of 2.5 to 5 on Tungsten Carbide, for example, will likely require a film with grade 60µ followed by films 45µ, 30µ and 15µ. It is important for operators to consider these factors – Ra and substrate – when selecting the grade of film for this belt. Overall, this micron-graded diamond abrasive delivers the desired finish without compromising the integrity of the substrate. Its strength and versatility make it a suitable abrasive for your finishing needs.
Typical properties
For industrial/occupational use only. Not for consumer sale or use.
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.
