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Description
Ruby Crystal Points are fast-cutting, tough abrasive points and cones engineered for accurate grinding across a wide range of materials — including steel, porcelain, glass, soft metals, and precious metals. Each shape is securely mounted on a 3/32" (2.4 mm) mandrel for reliable, centered rotation in standard rotary handpieces. With 18 shapes available, jewelers and metalsmiths can select the precise geometry needed for reaching tight areas, shaping prongs, cleaning up castings, or refining surfaces with control and efficiency.
Features
- Fast-cutting ruby crystal abrasive construction for aggressive material removal
- Suitable for steel, porcelain, glass, soft metals, and precious metals
- Shapes securely mounted on 3/32" (2.4 mm) mandrels
- 18 distinct shapes available — cylinders, cones, flames, knife edges, inverted cones, and rounds
- Sold in packs of 3 per shape
Specifications
| Mandrel Shank | 3/32" (2.4 mm) |
|---|---|
| Pack Quantity | 3 pieces per shape |
| Shapes Available | 18 |
| Material Compatibility | Steel, porcelain, glass, soft metals, precious metals |
Available Options
| Part # | Shape | Dimensions |
|---|---|---|
| 111.502 | #2 Cylinder | 2.55 mm x 6.9 mm |
| 111.503 | #3 Cone | 2.75 mm |
| 111.504 | #4 Cylinder | 2.4 mm x 7.5 mm |
| 111.507 | #7 Flame | 3.8 mm x 5.6 mm |
| 111.508 | #8 Knife Square End | 4.77 mm |
| 111.509 | #9 Cone | 3 mm |
| 111.510 | #10 Flame | 3.5 mm x 6.8 mm |
| 111.513 | #13 Knife Square End | 9.6 mm |
| 111.518 | #18 Round | 5.25 mm |
| 111.520 | #20 Knife Square Edge | 12.5 mm |
| 111.521 | #21 Knife Square Edge Flap Top | 7.2 mm |
| 111.522 | #22 Cylinder | 6.5 mm x 2.75 mm |
| 111.524 | #24 Cone | 5.4 mm x 9.5 mm |
| 111.525 | #25 Inverted Cone | 4.95 mm |
| 111.526 | #26 Cylinder | 5 mm x 12.2 mm |
| 111.527 | #27 Cylinder | 6.6 mm x 12.7 mm |
| 111.528 | #28 Cone w/ Flat Top | 3.6 mm x 10 mm |
| 111.530 | #30 Cylinder | 6.4 mm x 6.4 mm |
Specifications
- Brand
- Otto Frei
- Part #
- Varies by shape
- Type
- Polishing Wheels & Bobs
- Country of Origin
- United States
- Mandrel Shank
- 3/32" (2.4 mm)
- Pack Quantity
- 3 pieces per shape
- Shapes Available
- 18
- Material Compatibility
- Steel, porcelain, glass, soft metals, precious metals
California Prop 65 Warning:Cancer and Reproductive Harm. www.P65warnings.ca.gov.
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