{"id":403,"date":"2026-01-30T02:26:00","date_gmt":"2026-01-30T02:26:00","guid":{"rendered":"https:\/\/www.jccncmachining.com\/?post_type=process&p=403"},"modified":"2026-01-30T02:26:00","modified_gmt":"2026-01-30T02:26:00","slug":"polishing","status":"publish","type":"process","link":"https:\/\/www.jccncmachining.com\/de\/capabilities\/polishing\/","title":{"rendered":"Polishing"},"content":{"rendered":"

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Key Specifications<\/h3>\n<\/div>\n
\n\n\n\n\n\n\n\n\n\n\n
Specification<\/th>\nTechnical Range<\/th>\nNote<\/th>\n<\/tr>\n<\/thead>\n
Surface Roughness (Ra)<\/strong><\/td>\nDown to 0.05 \u00b5m (2 micro-inch)<\/td>\nMirror finish level<\/td>\n<\/tr>\n
Max Part Size<\/strong><\/td>\n1000 mm x 600 mm x 500 mm<\/td>\nManual buffing capacity<\/td>\n<\/tr>\n
Dimensional Change<\/strong><\/td>\n-0.005mm to -0.05mm<\/td>\nDepends on starting roughness<\/td>\n<\/tr>\n
Materialien<\/strong><\/td>\nStainless, Al, Brass, Ti, Plastics<\/td>\nHard metals take longer<\/td>\n<\/tr>\n
Gloss Level<\/strong><\/td>\nSatin to Mirror (No. 8 Finish)<\/td>\nCustomizable<\/td>\n<\/tr>\n
Standard Lead Time<\/strong><\/td>\n2 – 5 Days<\/td>\nLabor intensive process<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

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Polishing Methods<\/h3>\n\n\n\n\n\n\n\n\n
Method<\/th>\nDescription<\/th>\nKey Benefits & Applications<\/th>\n<\/tr>\n<\/thead>\n
Mechanical Buffing<\/strong><\/td>\nUsing polishing wheels with abrasive compounds (rouges) to physically smooth the metal surface progressively.<\/td>\nBenefit:<\/strong> Creates a true mirror reflection (No. 8 finish).
\nApp:<\/strong> Decorative trim, luxury goods, mold cavities.<\/td>\n<\/tr>\n
Electropolishing<\/strong><\/td>\nAn electrochemical process that removes surface ions. “Reverse plating.” Preferentially attacks peaks to smooth the surface.<\/td>\nBenefit:<\/strong> Microsmooth surface, deburrs edges, improves corrosion resistance.
\nApp:<\/strong> Medical instruments, food processing, vacuum chambers.<\/td>\n<\/tr>\n
Vapor Polishing<\/strong><\/td>\nExposing plastics (PC, Ultem, Acrylic) to chemical vapors that melt the surface layer to transparency.<\/td>\nBenefit:<\/strong> Clarifies internal channels that cannot be reached by hand.
\nApp:<\/strong> Optical lenses, fluid manifolds, medical reservoirs.<\/td>\n<\/tr>\n
Brushing \/ Satin<\/strong><\/td>\nUsing abrasive belts (Scotch-Brite) to create a directional grain pattern (like hairline finish).<\/td>\nBenefit:<\/strong> Hides fingerprints and scratches.
\nApp:<\/strong> Appliance panels, architectural fittings.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

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Design Guidelines for Polishing<\/h3>\n

Edge Rounding:<\/strong>
\nAggressive buffing will naturally round off sharp edges and corners. Tip:<\/strong> If you need a crisp, sharp edge (e.g., a sealing face), specify “Mask during polishing” or allow for a small radius.<\/p>\n

Material Removal:<\/strong>
\nTo remove deep CNC tool marks, we must remove material down to the bottom of the deepest scratch. This can affect dimensional tolerances by 0.01-0.03mm. Tip:<\/strong> Machine critical features slightly oversize to account for this.<\/p>\n

Access Restrictions:<\/strong>
\nMechanical wheels cannot reach into sharp internal corners or deep, narrow slots. These areas will remain “as-machined” or require expensive manual hand-working. Tip:<\/strong> Design with large internal radii.<\/p>\n

Surface Consistency:<\/strong>
\nLarge flat surfaces are the most difficult to polish perfectly without waviness or “orange peel.” Tip:<\/strong> A brushed or matte finish is more forgiving for large flat areas than a mirror finish.<\/p>\n<\/div>\n

<\/p>\n

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Industry Applications<\/h3>\n

Mold Making<\/strong>
\nPlastic injection molds require SPI A-1 diamond polishing to ensure the plastic part releases easily and has a glossy finish.<\/p>\n

Medical (ISO 13485)<\/strong>
\nSurgical implants and tools are electropolished to remove microscopic crevices where bacteria could hide, making them easier to sterilize.<\/p>\n

Automobilindustrie<\/strong>
\nExhaust tips, rim details, and interior aluminum trim are buffed to a high gloss for showroom appeal.<\/p>\n

Semiconductor<\/strong>
\nVacuum chambers and gas lines are electropolished to minimize surface area and outgassing, ensuring an ultra-high vacuum environment.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Polishing is a subtractive finishing process used to smooth a part’s surface, remove tool marks, and enhance its aesthetic appeal or functional performance (such as reducing friction or sealing capabilities). At Jucheng Precision, we offer everything from basic brushing to Ra 0.05\u00b5m Mirror Polishing.<\/p>\n

We combine skilled manual craftsmanship for complex geometries with automated vibratory finishing for high-volume orders. Our capabilities extend beyond metals; we also specialize in Vapor Polishing for optical plastics (PC\/Acrylic) and Electropolishing for medical and semiconductor components requiring ultra-clean surfaces.<\/p>","protected":false},"featured_media":404,"template":"","process_category":[38],"class_list":["post-403","process","type-process","status-publish","has-post-thumbnail","hentry","process_category-surface-finishes"],"_links":{"self":[{"href":"https:\/\/www.jccncmachining.com\/de\/wp-json\/wp\/v2\/process\/403","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jccncmachining.com\/de\/wp-json\/wp\/v2\/process"}],"about":[{"href":"https:\/\/www.jccncmachining.com\/de\/wp-json\/wp\/v2\/types\/process"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jccncmachining.com\/de\/wp-json\/wp\/v2\/media\/404"}],"wp:attachment":[{"href":"https:\/\/www.jccncmachining.com\/de\/wp-json\/wp\/v2\/media?parent=403"}],"wp:term":[{"taxonomy":"process_category","embeddable":true,"href":"https:\/\/www.jccncmachining.com\/de\/wp-json\/wp\/v2\/process_category?post=403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}