What is a Bud bur used for? (text only) )

 This particular essay was co-authored by my close friend Charles Wechsler from Brooklyn, New York. USA.

=>His office business is for handpiece repairs & sales:

1420 KINGS HIGHWAY

BROOKLYN, 11229. USA

telephone number: 718 - 339 - 2640

cell phone: 718 - 339 - 7901

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Bud-shaped diamond setter's burs (often named as 'Bud Burs' in setting tools) are mainly used in stone-setting to cut or refine seats and contours for round burs. These are used especially when you need a 'curved, tapered cavity' rather than a flat seat.

                                  MAIN APPLICATIONS:

A) => BEZEL SETTINGS

1) Bud burs are used to open and shape the inner wall of the bezel.

2) They help to create a smooth curved seat where the girdle of the diamond will eventually sit.

3) The tapered bud shape allows controlled cutting without widening the bezel too much.

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B) => FLUSH / GYPSY SETTING

1) These burs are used to refine the curved cavity inside the drilled

hole before the stone is inserted into the metal.

2) This helps the girdle curve of the diamond to sit properly.

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C) => BURNISH / TUBE SETTING 

1) The Bud shaped burs greatly shape the inside of the tube before setting of the stone.

2) This is very useful for creating a rounded seat that supports the pavilion of the selected stone.

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D) => GENERAL SEAT REFINING

  After drilling or using a round as well as a "156C" bearing bur, stone setters usually use a bud bur to do the following steps:

1) Contour the seat!

2) Slightly taper the cavity!

3) Adjust the fitting of the stone!

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E) => WHY DO STONE SETTERS USE BUD BURS?

 1) A tapered shape gives a better control in tight areas.

2) It creates a more natural curved seat for round stones.

3) A Bud bur assists in avoiding over-cutting the setting wall.

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F: => COMPARISONS WITH OTHER SETTING BURS.

1) 156C burs => Gives a precise girdle seat for Faceted stones.

2) Hart, (HSS) shaped burs => Prepares the seat for claw setting.

3) Bud burs => these are excellent in shaping curved or tapered cavities and Bezel interiors.

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IN CONCLUSION: 

Bud shaped burs are mostly used with the following techniques:

1) Bezel Settings.

2) Gypsy / Flush Setting.

3) Tube Settings.

 These burs are used to shape or refine the seat for the stone. These burs are primarily excellent for round gemstones.