Description
Ball-shaped corundum grinding bits for precision sharpening, deburring, and general-purpose grinding with Proxxon Micromot rotary tools. Made from high-quality base materials of consistent hardness, these bits deliver reliable performance across a wide range of hard materials. The ball profile is ideal for grinding concave surfaces, internal radii, and curved contours where flat or cylindrical bits can't conform to the workpiece geometry.
Specifications:
- Shape: ball
- Abrasive: corundum (aluminum oxide)
- Shank diameter: 2.35mm (3/32") or 3.0mm (7/64") — accurately dimensioned for highest concentricity
- Quantity: 3 pieces per pack
Ideal for:
- Grinding concave surfaces and internal radii
- Sharpening and deburring
- Cast iron and unhardened steels
- Non-ferrous metals and hard metal alloys
- Welded joints, rivets, and rust removal
Proxxon No. 28782
Works Well With:
- Professional Rotary Tool IBS/E — primary compatible Micromot rotary tool
- Proxxon AC Adapter NG 5/E with Electronic Speed Control (No. 38704) — variable speed bench power for controlled grinding
- Proxxon AC Adapter NG 2/S (No. 38706) — basic bench power supply for Micromot tools
- Corundum Grinding Bits — Cylinder Shape, 3-Pack — cylinder-shaped companion for straight surface grinding
- Corundum Grinding Bits — Wheel Shape, 3-Pack — wheel-shaped companion for flat surface and edge grinding
- Aluminum-Oxide Mounted Points — Round Shape, 5-Pack (No. 28772) — larger round grinding points for similar curved surface work
Returns can only be accepted for unused product in its original packaging. In addition to the returned item/items, a copy of the original packing slip or invoice is required. If proper paperwork is missing, PROXXON Inc. will not issue a credit. For warranty claims please call 1-877-776-9966. Please see our return and refund policy here.
California Residents Prop 65 Information
WARNING: This product can expose you to chemicals including lead, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.