Skip to content
Contact Us Jewelry School Partners Frequently Asked Questions Submit Tax Exemption
Swiss Fig. 77B Cup Burs 4.00mm-10.00mm - Otto Frei

Swiss Fig. 77B Cup Burs 4.00mm-10.00mm

Part # 118.386

Single unit weight: -- lbs / -- kg

$14.65
Availability:
9 in stock, ready to be shipped
Availability:
18 in stock, ready to be shipped
Availability:
6 in stock, ready to be shipped
Availability:
Only 2 left!
Availability:
Only 4 left!
Availability:
14 in stock, ready to be shipped
Availability:
7 in stock, ready to be shipped
Availability:
7 in stock, ready to be shipped
Availability:
11 in stock, ready to be shipped
Availability:
10 in stock, ready to be shipped
Availability:
14 in stock, ready to be shipped
Availability:
38 in stock, ready to be shipped
Availability:
6 in stock, ready to be shipped
by Otto Frei Swiss Burs
Bur Size: 8.50mm

Product Details

Swiss Fig. 77B cup burs are designed for rounding, shaping, and smoothing metal edges and prongs with precision control. The cup-shaped cutting head allows you to refine contours and create clean, uniform finishes in precious metals with balanced, consistent performance.

Features

  • Fig. 77B cup bur profile for rounding and smoothing prongs and edges
  • Manufactured from tungsten vanadium steel for strength and durability
  • Precision-made to tight tolerances for consistent cutting performance
  • Large diameter sizes ideal for heavier stock and bold settings
  • Preferred by many jewelers for everyday bench use
  • Sold individually

Specifications

Bur Type Fig. 77B Cup
Material Tungsten Vanadium Steel
Size Range 4.00 mm (0.157 in.) – 10.00 mm (0.394 in.)
Manufactured In Switzerland
Brand Otto Frei Swiss Burs

Available Options

Part # Bur Size
118.386 8.50 mm (0.335 in.)
118.387 9.00 mm (0.354 in.)
118.388 9.50 mm (0.374 in.)
118.389 10.00 mm (0.394 in.)
118.391 4.00 mm (0.157 in.)
118.392 4.50 mm (0.177 in.)
118.393 5.00 mm (0.197 in.)
118.394 5.50 mm (0.217 in.)
118.395 6.00 mm (0.236 in.)
118.396 6.50 mm (0.256 in.)
118.397 7.00 mm (0.276 in.)
118.398 7.50 mm (0.295 in.)
118.399 8.00 mm (0.315 in.)
California Prop 65 Warning California Prop 65 Warning:
Cancer and Reproductive Harm. www.P65warnings.ca.gov.