3M™ Diamond Microfinishing Film Roll 675L

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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

Polyester film backing allows roll to be used dry or wet with surface lubricants

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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
  • 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 675L delivers fine finishes on hard metals like thermal spray coating, ceramics, carbides, chilled iron and granite.

LONG

3M™ Diamond Microfinishing Film Roll 675L
675L film allows target finishes to be achieved in fewer passes for greater productivity
High-quality Materials for Microfinishing
3M™ Diamond Microfinishing Film Roll 675L securely anchors micron-graded diamonds to a polyester film backing. Known for its strength and resilience, the polyester film backing makes it tough so that it can withstand heavy-duty finishing. The rolls 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 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 675L roll enables slow abrasive feed rates and requires fewer steps, because of its durability, which in turn can reduce costs.

Achieving the Desired Roughness Average
Many microfinished 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. 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.

<strong class="MMM--txt_bold" "="">Superfinishing with 3M™ Diamond Microfinishing Film 675L
Sequential Surface Finishes Obtained (Ra Micro Inch)
Roll Material 74μ 45μ 30μ 20μ
Tungsten Carbide Ra 12-16 8-12 5-8 2.5-5
Chrome Carbide Ra 15-20 10-14 6-10 4-6
Nickel Based Ra 20-55 14-19 6-10 4-6
Chrome Oxide Ra -55 -45
 
Operating Conditions Recommended Acceptable Range
Workpiece Speed 300 sfpm 150-350
Traverse Rate 0.07 inch/rev 0.03-0.1
Abrasive Support 65 Shore A Roller
Abrasive Speed 0.5-1.0 inch/min
Pressure 20 lbs/inch width 10-40
Oscillation Alternating Moderate/None
Coolant Water with 4-8% synthetic coolant

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Overall Width (Metric) 101.6 mm, 203.2 mm
Product Form Roll
Overall Width (Imperial) 4 in, 8 in
Overall Length (Metric) 15.24 m, 7.5 m, 15.25 m, 45.75 m
Overall Length (Imperial) 50 ft, 25 ft, 150 ft
Abrasive Material Diamond
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.