Sunmight 3" Quick Change Ceramic Locking Discs, R-Type

Product Overview Sunmight Ceramic 3" Quick Change Locking Discs (R-Type) are premium heavy‑duty surface conditioning and grinding discs engineered for fast stock removal, long life, and consistent cutting performance. Manufactured with high‑performance ceramic grain, these discs deliver superior durability, faster cut rate and longer working lifetime compared to competitor ceramics and traditional aluminum oxide and zirconia quick‑change discs. Designed for demanding applications in automotive, marine, aerospace, metal fabrication, and industrial repair, Sunmight Ceramic discs excel on tough materials including steel, stainless steel, aluminum, composites, and gelcoat. Sunmight’s R‑Type quick‑change system provides fast disc swaps, secure attachment, and smooth operation on both pneumatic and electric die grinders. Grits Available: 24, 36, 50, 80 Size: 3" diameter Packaging: 25 discs per box Key Features & Benefits Premium Ceramic grain for aggressive cutting and extended disc life Heavy‑duty polyester cloth backing for durability under high pressure Closed‑coat construction for maximum material removal R‑Type quick‑change locking system for fast disc swaps Excellent performance on steel, stainless steel, aluminum, composites, and gelcoat Ideal for weld grinding, beveling, shaping, deburring, and surface prep Consistent cutting action reduces operator fatigue and improves productivity Sunmight Ceramic vs. Standard Quick Change Discs Cut Rate: Ceramic cuts faster and stays sharper longer than AO or Zirconia Durability: Ceramic lasts significantly longer under heavy pressure Heat Resistance: Ceramic stays cool, reducing discoloration and loading Consistency: Ceramic maintains its cutting ability throughout its lifespan Cost Efficiency: Fewer disc changes and longer life reduce total abrasive cost SMSDistributors.com Expert Notes Sunmight Ceramic 3" Quick Change Discs are a top choice for technicians who need aggressive cutting power in a compact format. These discs outperform traditional A/O and Zirconia discs, especially on stainless steel, aluminum, and composite materials. Marine technicians appreciate the Ceramic grain for working hard metal, metal burrs and welding seams, old paint removal, and heavy material removal. Automotive and metal fabrication shops rely on these discs for weld grinding, rust removal, and shaping body filler. We recommend pairing these discs with a high‑quality pneumatic die grinder for best performance. Technical Specifications Disc Size: 3" diameter Grain: Ceramic Backing: Y‑weight 100% polyester cloth Bond: Phenolic resin Coating: Closed coat Attachment: R‑Type quick‑change locking system Grits Available: 24, 36, 50, 80 Packaging: 25 discs per box Grit Selection Guide 24 grit: Heavy grinding, weld removal, aggressive stock removal 36 grit: Shaping metal, beveling edges, fiberglass/gelcoat reduction 50 grit: Medium grinding, surface leveling, composite prep 80 grit: Blending, smoothing, pre‑finish metal prep Best For Weld grinding and metal shaping Old paint removal Automotive rust removal and bodywork Composite material shaping General industrial grinding and deburring Heavy‑duty surface preparation Compatible With 3" R‑Type quick‑change mandrels Pneumatic die grinders Electric die grinders Right‑angle grinders with quick‑change adapters 3" R-Type quick‑change disc holder Recommended Systems 3" R‑Type quick‑change disc holder High‑speed pneumatic die grinders (up to 20,000 RPM) High‑speed electric die grinders with (up to 20,000 RPM) Sunmight Ceramic and Zirc quick‑change disc families Frequently Asked Questions (FAQ) Are Sunmight Ceramic discs good for use on metal seams and weld burrs? Yes. The Ceramic grain consistently exposes sharp or uneven areas, cutting down on time and labor. Can these discs be used on stainless steel? Absolutely. Ceramic grain excels on stainless steel due to its heat resistance and fast cutting action. Do I need a special mandrel? Yes — these discs use an R‑Type quick‑change locking system. Any standard 3" R‑Type mandrel will work. What RPM should I use? For best performance, use a die grinder capable of 20,000 RPM. About Us SMSDistributors.com is an authorized Sunmight distributor supplying professional-grade abrasives for automotive, marine, metal fabrication, woodworking, and industrial applications. With over 15 years of experience, we provide fast shipping, expert support, and reliable products trusted by professionals nationwide. Category: Sunmight, Quick Change Grinding Discs, R-Type Locking Discs, Ceramic