Aluminium Lapping Film Discs

Professional aluminium oxide (AlOx) precision lapping film discs for fine lapping and polishing of glass, optical components, gemstones, semiconductor dies, and fiber optics. Alumina abrasive (gamma phase Mohs 8, alpha phase Mohs 9 / 2000 HV) resin-bonded on rigid 3-mil polyester film delivers consistent abrasive distribution, stable cutting action, and predictable material removal rates. Available in 6" and 8" diameters with PSA or plain backing, in 11 micron grades from 0.3μm to 60μm. Sold in 10-pack sets.

Available Sizes & Pricing

Diameter Micron Range Backing Pack Price
6" 0.3, 0.5, 1, 2, 3, 5, 9, 15, 30, 40μm PSA Sticker 10 pcs $20.00
6" 0.3, 0.5, 1, 2, 3, 5, 9, 15, 30, 40μm Plain (no backing) 10 pcs $18.00
8" 0.3, 0.5, 1, 2, 3, 5, 9, 15, 30, 45, 60μm PSA Sticker 10 pcs $30.00
8" 0.3, 0.5, 1, 2, 3, 5, 9, 15, 30, 45, 60μm Plain (no backing) 10 pcs $30.00

Micron Grade Selection Guide

Micron Grade Stage Typical Application
30 – 60μm Coarse Lapping Stock removal, planarization, rough scratch elimination
9 – 15μm Intermediate Lapping Surface smoothing, stepping down from coarse abrasive
1 – 5μm Fine Lapping Pre-polish finish, preparing substrates for sub-micron stage
0.3 – 0.5μm Final Polishing High-gloss optical finish, mirror polishing on glass and gems

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Frequently Asked Questions

  • Q: What materials are aluminium oxide lapping film discs best suited for?
    A: Aluminium oxide lapping films are ideal for optical glass, laser crystals, medium-hardness gemstones (such as quartz, beryl, and tourmaline), metallographic specimens, semiconductor substrates, and fiber optic connector polishing.
  • Q: What is the difference between PSA and Plain backing?
    A: PSA (Pressure Sensitive Adhesive) discs feature a peel-and-stick backing that adheres securely to flat lap master plates or acrylic backing discs. Plain discs have no adhesive and can be held in place with a thin water film, spray adhesive, or a retaining ring.
  • Q: Can these discs be used wet or dry?
    A: While they can run dry in certain controlled fiber optic setups, wet lapping with clean water or specialized lapping fluid is highly recommended for lapidary and glass work to prevent clogging, control temperature, and maximize abrasive life.
  • Q: How do aluminium oxide discs compare to diamond lapping films?
    A: Aluminium oxide is slightly softer and more friable than diamond, providing a very gentle, controlled cutting action that minimizes subsurface micro-fracturing on delicate optical glass and softer lapidary materials.