Bloc de sertissage ovale au ratio de 80 %, petit — de 4 mm x 3,2 mm à 14 mm x 11,2 mm — 11 trous, 17 degrés

A bezel block turns a strip of annealed metal into a shaped bezel quickly and repeatably at the bench. This oval block from OMO carries an 80% ratio, meaning the width of each hole is 80% of its height, a proportion especially well suited to cabochon gemstones. Its 11 graduated hole sizes run from 4 mm × 3.2 mm to 14 mm × 11.2 mm, covering a broad range of bezel-setting work in one compact tool.

The block is Italian-made from specially hardened steel, every hole is cut at the 17° taper angle, and a matching oval 17° punch is included. Because punches can break under normal use, replacement punches are available for all blocks.

Features

• 80% ratio oval profile, width is 80% of height, ideal for cabochon gemstones
• 11 graduated hole sizes from 4 mm × 3.2 mm to 14 mm × 11.2 mm
• 17° taper angle for precise bezel forming
• Made from specially hardened steel
• Matching oval 17° punch included
• Italian-made construction

Notes

What you get:

• 1 oval 80% ratio bezel block
• 1 matching oval 17° punch
• Hole sizes: 4 × 3.2, 5 × 4, 6 × 4.8, 7 × 5.6, 8 × 6.4, 9 × 7.2, 10 × 8, 11 × 8.8, 12 × 9.6, 13 × 10.4, and 14 × 11.2 mm
• Punches may break under normal use, and replacement punches are available separately for all blocks
• Oval bezel blocks are also offered in 75% and 60% ratios. The 75% ratio is historically popular and more closely matches faceted gemstone shapes, while the 80% ratio has become the preferred choice for cabochon work