Why is Precision Masking Important in Part Polishing?

Precision masking is used to protect delicate part features during centrifugal barrel finishing (CBF) processes such as polishing, deburring, descaling and deflashing.

Parts, features and finishing requirements are assessed prior to processing masked may be used for multiple reasons. Masking may be internal, external and/or a combination of both. Reasons for masking include:

• PART FEATURE PRESERVATION
  Threads, deep features and part radii need to be protected during certain phases of the part polishing process. Laser etching, serial/part numbers and unique identifiers also need to be protected with special products that meet the necessary temperature requirements.
• LIMIT EXCESS EDGE RADIUS
  CBF processing allows for a high volume of parts to be processed simultaneously while meeting defined metal radius corner specifications. Excessive edge radiusing can occur if parts are not protected.
• PREVENT MEDIA LODGING
  Temporary plugs are used to ensure holes are preserved and to prevent media from becoming lodged in blind holes. For example, on small motors, the oiler hole or lubrication cavity can plug. Using a plug mask, we ensure the holes in the part are protected to ensure proper fluid flow for hydraulic and lubrication applications.
• AVOID SHADOWING
  Shadowing occurs when lodged media, masking challenges or improper media selection during a previous processing step create inconsistencies across the surface of a part.

STANDARD MASKING PRODUCTS

• Caps
• Plugs
• Tape
• Netting
• Spiral Wrap
• Thread Protectors

CUSTOM MASKING SOLUTIONS

Custom masks are developed when standard plugs and caps do not properly fit parts with custom threads, unique part geometry, non-standard part features, or proprietary shapes. The ISO team is experienced in creating custom solutions when other options do not fit.

WHEN IS MASKING APPLIED?

Masking applications are unique to each project and are determined by the needs of the customer, a part’s material, and the specific areas that do/do not require finishing. A mask may be applied to the exterior first, then the interior or vice versa. There are instances when masking is used during the first phase of finishing and removed prior to subsequent phases.

ABOUT ISO FINISHING

ISO Finishing is an expert in creating micro-precision surface improvements that are documented and repeatable for parts in any material with unique part geometries, features and shapes.

Let us show you how our finish will become your finish by processing your sample. Let us show you what we can do. LET’S GET IT FINISHED.