Collection: Silicon Carbide Lapping Film Discs

Professional silicon carbide (SiC) precision lapping film discs for fine lapping and polishing of glass, non-ferrous metals, polymers, and brittle substrates. SiC abrasive resin-bonded on Mylar film backing — color-coded by grit for rapid identification, consistent cutting action, and controlled material removal. Available in 6" and 8" diameters with PSA or plain backing, in 7 micron grades from 1μm to 30μm. Sold in 10-pack sets. Not recommended for power head systems.

🔥 Shop Silicon Carbide Lapping Film Discs – From $30.00

Available Sizes & Pricing

Micron Grade Guide

Compatible Applications

• Non-ferrous metals: aluminum, copper, brass, titanium
• Polymers and composite materials
• Brittle substrates: glass, ceramics, crystal
• Optical components and precision glass surfaces
• Not recommended for power head systems or hard gemstones (Mohs 7+) — use diamond lapping film instead

Related Tools

• Diamond Lapping Film Discs — Diamond abrasive film for hard gemstones (Mohs 7+) and harder materials
• Aluminium Oxide Lapping Film Discs — AlOx film for optical components and semiconductor applications
• Cerium Oxide Lapping Film Discs — CeO₂ pads for final mirror polish after SiC lapping sequence
• Master Support Laps — Precision flat support laps for mounting lapping film discs
• Magnetic Backed Plates — Quick-change magnetic plates for PSA-backed disc systems
• Flexible Sanding Discs — Diamond sanding discs for curved surfaces and wet grinding before lapping

Frequently Asked Questions

• Q: What is silicon carbide lapping film best suited for compared to diamond or aluminium oxide film?
  A: Silicon carbide lapping film excels on non-ferrous metals (aluminum, copper, brass), polymers, and brittle substrates like glass and ceramics where its sharp, friable cutting action produces clean, consistent surfaces. For hard gemstones (Mohs 7+) or semiconductor-grade precision work, diamond lapping film is preferred for its superior hardness and longer disc life. For optical-quality final polishing, aluminium oxide or cerium oxide film delivers finer, more controlled results.
• Q: Why are silicon carbide lapping film discs color-coded?
  A: Color-coding allows rapid visual identification of grit grades during multi-stage lapping sequences, eliminating the risk of using the wrong grit and cross-contaminating surfaces. Each micron grade has a distinct color, making it easy to organize discs and maintain a clean, systematic lapping workflow.
• Q: What is the difference between PSA and plain-backed silicon carbide lapping film?
  A: PSA-backed discs have a self-adhesive backing for direct, secure mounting on flat lap platens or backing plates — ideal for machine use. Plain (non-PSA) discs can be mounted with water tension on glass plates or with spray adhesive, offering more flexibility for hand lapping and custom setups. Note: plain 8" discs are not currently available — only PSA-backed 8" discs are stocked.
• Q: Can silicon carbide lapping film be used on gemstones?
  A: SiC lapping film is suitable for softer gemstones (Mohs below 7) such as fluorite, calcite, and soft minerals. For harder lapidary stones like agate, quartz, jasper, and sapphire (Mohs 7+), diamond lapping film or diamond flat lap discs are required — SiC abrasive wears too quickly on hard gem materials to be cost-effective.
• Q: Why are silicon carbide lapping film discs not recommended for power head systems?
  A: Power head systems generate higher rotational speeds and pressures than standard flat lap machines. At these speeds, SiC lapping film on Mylar backing can delaminate or tear, creating safety hazards and inconsistent surface finishes. For power head applications, use diamond lapping film or diamond flat lap discs rated for higher-speed use.