Busch Fig. 411CCC Clean Cut Concave Cup Kit of 20 Burs 1.00mm-2.30mm

Busch Fig. 411CCC Clean Cut Concave Cup burs are among the most precise jeweler's burs available, engineered to ultra-high tolerances from tungsten vanadium steel. This kit spans a full range of sizes from 1.00 mm to 2.30 mm, giving bench jewelers and stone setters a comprehensive selection of cup burs in a single, organized plastic container.

CCC stands for Clean Cut Concave. Clean Cut means the cutting edges are open, allowing metal shavings to be easily expelled from inside the bur without marring the surface being cut. Concave refers to the traditional cup bur shape that leaves a rounded, finished top on the prong—ideal for prong finishing and setting work. A Concave Cone shape is also available separately in the Busch 411C and Busch 411CT bur styles.

Features

• Tungsten vanadium steel construction machined to ultra-high precision tolerances
• Clean Cut geometry keeps cutting edges open for efficient chip expulsion
• Concave cup profile produces a smooth, rounded prong top
• Covers 10 sizes from 1.00 mm through 2.30 mm in a single kit
• 2 burs of each size included—20 burs total
• Stored and supplied in an organized plastic container

Specifications

What's Included

• B118.421 — Busch 411CCC 1.00 mm (qty 2)
• B118.421.5 — Busch 411CCC 1.10 mm (qty 2)
• B118.422 — Busch 411CCC 1.20 mm (qty 2)
• B118.422.5 — Busch 411CCC 1.30 mm (qty 2)
• B118.423 — Busch 411CCC 1.40 mm (qty 2)
• B118.423.5 — Busch 411CCC 1.50 mm (qty 2)
• B118.424 — Busch 411CCC 1.60 mm (qty 2)
• B118.425 — Busch 411CCC 1.80 mm (qty 2)
• B118.426 — Busch 411CCC 2.10 mm (qty 2)
• B118.426.5 — Busch 411CCC 2.30 mm (qty 2)

Notes

The Concave Cone cup bur shape is available separately in the Busch Fig. 411C and Busch Fig. 411CT styles. Individual 411CCC burs in these sizes are also available separately from OttoFrei.