Diamond Lapping Film Discs

Diamond Lapping Film – PSA Discs, Rolls & Sheets for Precision Metal, Glass, Ceramic & Gemstone Finishing

Professional diamond lapping film in PSA-backed disc packs, precision sheet packs, and roll formats for precision surface finishing of metal, glass, ceramic, fiber optics, and gemstone. Available in 6" and 8" PSA disc packs (10pcs), 280×220mm sheet packs (5pcs), and rolls in 30mm, 55mm, and 101.6mm widths from 5M to 45M length. Micron grades from 0.3µm (ultra-fine optical polish) through 80µm (coarse lapping) — covering every diamond lapping application from bench polishing through automated precision lapping and fiber optic connector polishing.

🔥 Shop Diamond Lapping Film – From $16.00

Available Sizes & Pricing

Format Size Pack / Length Micron Range Price
PSA Disc Pack 6" diameter 10pcs 0.3 – 80 µm $20.00
PSA Disc Pack 8" diameter 10pcs 0.3 – 80 µm $34.00
Sheet Pack 280×220mm 5pcs 0.5 – 80 µm $16.00 – $20.00
Lapping Film Roll 30mm × 10M — 0.5 – 80 µm $100.00
Lapping Film Roll 55mm × 20M — 0.5 – 80 µm $160.00
Lapping Film Roll 101.6mm × 5M — 0.5 – 80 µm $150.00
Lapping Film Roll 101.6mm × 10M — 0.5 – 80 µm $200.00
Lapping Film Roll 101.6mm × 45M — 0.5 – 80 µm $1,200.00

Micron Grade Selection Guide

Micron Grade Equivalent Grit Stage Application
60 – 80 µm ~220 grit Coarse lapping Initial scratch removal, surface leveling
30 – 40 µm ~400 grit Medium lapping Surface refinement, coarse scratch removal
9 – 15 µm ~1200 grit Fine lapping Pre-polish surface preparation
3 – 5 µm ~3000 grit Fine pre-polish Near-scratch-free surface
0.5 – 1 µm ~14000 grit Mirror polish Final optical-quality surface finish
0.3 µm ~50000 grit Ultra-fine polish Optical components, fiber optic connectors

Compatible Applications

  • Flat lap machine polishing — PSA discs mount directly on backing plates
  • Precision metal surface finishing — carbide, tool steel, hardened components
  • Fiber optic connector end-face polishing (PC, UPC, APC)
  • Optical component surface finishing — lenses, prisms, windows
  • Gemstone pre-polish and final polish on flat lap machines
  • Ceramic and porcelain precision surface finishing
  • Automated lapping machine film feed (roll format)

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Frequently Asked Questions

  • Q: What is the difference between diamond lapping film discs and diamond lapping film rolls?
    A: PSA-backed disc packs (6" and 8") are designed for flat lap machines and bench polishing — peel and stick directly to a backing plate for quick setup. Roll format is used in automated lapping machines, fiber optic connector polishing fixtures, and precision lapping jigs where continuous film feed is required. Sheet packs (280×220mm) are ideal for hand lapping flat surfaces and fixture-based precision lapping of optical components.
  • Q: What micron grade diamond lapping film should I use for gemstone polishing on a flat lap?
    A: For gemstone pre-polish on a flat lap, start with 9–15 µm diamond lapping film, progress to 3–5 µm for fine pre-polish, and finish with 0.5–1 µm for mirror polish on hard gems (Mohs 7+). The PSA-backed 6" or 8" disc packs mount directly on magnetic or PSA backing plates for easy stage-by-stage disc changes.
  • Q: Can diamond lapping film be used for fiber optic connector polishing?
    A: Yes — diamond lapping film rolls (30mm and 55mm widths) are widely used for fiber optic connector end-face polishing (PC, UPC, APC). Use progressively finer grits from 30 µm through 1 µm diamond film, then finish with 0.3 µm diamond or 0.2 µm cerium oxide lapping film for the final optical-quality surface finish.
  • Q: What is the PSA backing option on lapping film discs?
    A: PSA (Pressure Sensitive Adhesive) backing adds a peel-and-stick adhesive layer to the back of the lapping film disc, allowing direct mounting on flat lap platens, backing plates, or glass surfaces without separate adhesive. The non-PSA option is used in wet lapping fixtures where the film is held by surface tension or mechanical clamping.
  • Q: What micron grade should I use for precision metal surface finishing?
    A: For precision metal surface finishing, start with 30–45 µm for initial scratch removal, progress through 15, 9, 6, 3 µm for surface refinement, then 1 µm and 0.5 µm for near-mirror finish. Diamond lapping film produces significantly better surface finish consistency than conventional abrasive papers for precision metal, carbide, and ceramic component finishing.