Hollow Cup Diamond Drill Bit

Hollow Cup Drill Bit

Diamond Hollow Cup Burs are specialized rotary tools designed for efficient material removal, hollowing, and shaping applications on hard surfaces such as gemstones, glass, ceramics, and metals. Their unique concave design allows for deep grinding and contouring, making them indispensable for lapidary artists, jewelers, and industrial craftsmen.

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100pcs 6mm Shank Tapered inverted cone hollow-Shaped diamond burs
100pcs 6mm Shank Tapered...
Tapered inverted cone hollow-Shaped diamond burs are perfect for carving, grinding and pre-forming both hard and soft material such as glass, stones, ceramics, bone and metals. Each bur has a 1-1/2" l…
$30.00
Tapered inverted cone hollow-Shaped diamond burs are perfect for carving, grinding and pre-forming both hard and soft material such as glass, stones, ceramics, bone and metals. Each bur has a 1-1/2" l…
20mm Head M10 Thread Spherical Concave Diamond Grinding Head
20mm Head M10 Thread...
Diamond Mounted Point 20-50Mm Head Diameter Spherical Concave Head Bead Coarse Grinding Bit for Jade Amber Stone Beeswax Electroplated Diamond Has High Hardness and Good Wear Resistance. Chamfered rou…
$6.00
Diamond Mounted Point 20-50Mm Head Diameter Spherical Concave Head Bead Coarse Grinding Bit for Jade Amber Stone Beeswax Electroplated Diamond Has High Hardness and Good Wear Resistance. Chamfered rou…
25mm Head M10 Thread Spherical Concave Diamond Grinding Head
25mm Head M10 Thread...
Diamond Mounted Point 20-50Mm Head Diameter Spherical Concave Head Bead Coarse Grinding Bit for Jade Amber Stone Beeswax Electroplated Diamond Has High Hardness and Good Wear Resistance. Chamfered rou…
$6.50
Diamond Mounted Point 20-50Mm Head Diameter Spherical Concave Head Bead Coarse Grinding Bit for Jade Amber Stone Beeswax Electroplated Diamond Has High Hardness and Good Wear Resistance. Chamfered rou…
30mm Head M10 Thread Spherical Concave Diamond Grinding Head
30mm Head M10 Thread...
Diamond Mounted Point 20-50Mm Head Diameter Spherical Concave Head Bead Coarse Grinding Bit for Jade Amber Stone Beeswax Electroplated Diamond Has High Hardness and Good Wear Resistance. Chamfered rou…
$7.00
Diamond Mounted Point 20-50Mm Head Diameter Spherical Concave Head Bead Coarse Grinding Bit for Jade Amber Stone Beeswax Electroplated Diamond Has High Hardness and Good Wear Resistance. Chamfered rou…
35mm Head M10 Thread Spherical Concave Diamond Grinding Head
35mm Head M10 Thread...
Diamond Mounted Point 20-50Mm Head Diameter Spherical Concave Head Bead Coarse Grinding Bit for Jade Amber Stone Beeswax Electroplated Diamond Has High Hardness and Good Wear Resistance. Chamfered rou…
$7.50
Diamond Mounted Point 20-50Mm Head Diameter Spherical Concave Head Bead Coarse Grinding Bit for Jade Amber Stone Beeswax Electroplated Diamond Has High Hardness and Good Wear Resistance. Chamfered rou…
40mm Head M10 Thread Spherical Concave Diamond Grinding Head
40mm Head M10 Thread...
Diamond Mounted Point 20-50Mm Head Diameter Spherical Concave Head Bead Coarse Grinding Bit for Jade Amber Stone Beeswax Electroplated Diamond Has High Hardness and Good Wear Resistance. Chamfered rou…
$8.00
Diamond Mounted Point 20-50Mm Head Diameter Spherical Concave Head Bead Coarse Grinding Bit for Jade Amber Stone Beeswax Electroplated Diamond Has High Hardness and Good Wear Resistance. Chamfered rou…
45mm Head M10 Thread Spherical Concave Diamond Grinding Head
45mm Head M10 Thread...
Diamond Mounted Point 20-50Mm Head Diameter Spherical Concave Head Bead Coarse Grinding Bit for Jade Amber Stone Beeswax Electroplated Diamond Has High Hardness and Good Wear Resistance. Chamfered rou…
$9.00
Diamond Mounted Point 20-50Mm Head Diameter Spherical Concave Head Bead Coarse Grinding Bit for Jade Amber Stone Beeswax Electroplated Diamond Has High Hardness and Good Wear Resistance. Chamfered rou…
50mm Head M10 Thread Spherical Concave Diamond Grinding Head
50mm Head M10 Thread...
Diamond Mounted Point 20-50Mm Head Diameter Spherical Concave Head Bead Coarse Grinding Bit for Jade Amber Stone Beeswax Electroplated Diamond Has High Hardness and Good Wear Resistance. Chamfered rou…
$9.50
Diamond Mounted Point 20-50Mm Head Diameter Spherical Concave Head Bead Coarse Grinding Bit for Jade Amber Stone Beeswax Electroplated Diamond Has High Hardness and Good Wear Resistance. Chamfered rou…
5pcs 10mm Head 6mm Shaft Spherical Concave Diamond Grinding Head
5pcs 10mm Head 6mm Shaft...
Ideal for polishing jade, amber, stone, beeswax, glass, and more. Specifically designed for shaping and grinding spherical beads. Produces clean and precise beads within minutes with minimal to no chi…
$12.00
Ideal for polishing jade, amber, stone, beeswax, glass, and more. Specifically designed for shaping and grinding spherical beads. Produces clean and precise beads within minutes with minimal to no chi…
5pcs 12mm Head 6mm Shaft Spherical Concave Diamond Grinding Head
5pcs 12mm Head 6mm Shaft...
Ideal for polishing jade, amber, stone, beeswax, glass, and more. Specifically designed for shaping and grinding spherical beads. Produces clean and precise beads within minutes with minimal to no chi…
$13.00
Ideal for polishing jade, amber, stone, beeswax, glass, and more. Specifically designed for shaping and grinding spherical beads. Produces clean and precise beads within minutes with minimal to no chi…
5pcs 14mm Head 6mm Shaft Spherical Concave Diamond Grinding Head
5pcs 14mm Head 6mm Shaft...
Ideal for polishing jade, amber, stone, beeswax, glass, and more. Specifically designed for shaping and grinding spherical beads. Produces clean and precise beads within minutes with minimal to no chi…
$15.00
Ideal for polishing jade, amber, stone, beeswax, glass, and more. Specifically designed for shaping and grinding spherical beads. Produces clean and precise beads within minutes with minimal to no chi…
5pcs 16mm Head 6mm Shaft Spherical Concave Diamond Grinding Head
5pcs 16mm Head 6mm Shaft...
Ideal for polishing jade, amber, stone, beeswax, glass, and more. Specifically designed for shaping and grinding spherical beads. Produces clean and precise beads within minutes with minimal to no chi…
$17.00
Ideal for polishing jade, amber, stone, beeswax, glass, and more. Specifically designed for shaping and grinding spherical beads. Produces clean and precise beads within minutes with minimal to no chi…