CTD SD-3 Ball Shape Carbide Burr

CTD SD-3 Ball Shape Carbide Burr

The 18089 CTD SD-3 Ball Shape Carbide Burr is a tungsten carbide die grinder burr built for deburring, contouring, rounded edge work, and weld-prep cleanup on a wide range of materials. With a double-cut (cross-cut) grind for smoother results and controlled chip removal, it’s a go-to option for medium stock removal, finishing, and cleaning—especially when HSS just isn’t tough enough for the job.

Country of Origin
Varies by production batch

Key Features / Specifications

• Part Number: 18089
• Brand / Series: CTD SD-3
• Product Type: Ball shape tungsten carbide burr / die grinder bit
• Quantity: 1 piece
• Head Shape: Ball
• Head Diameter: 3/8"
• Length of Cut: 5/16"
• Shank Diameter: 1/4"
• Overall Length: 2-1/2"
• Cut Style: Double cut (cross cut)
• Max RPM: 70,000 RPM (often uncommon to need more than 35,000 RPM)
• Performance Note: Tungsten carbide is extremely hard for demanding jobs; carbide is preferred for long-term performance (as stated)

Ideal For

• Hole/bore deburring, interior contouring, and rounded-edge processing
• Removing build-up before welding preparations and general cleanup work
• Use on die grinders and hand-held pneumatic grinders
• Working materials including:
  • Ferrous: Cast iron, steel, stainless steel, titanium, nickel, wrought iron
  • Non-ferrous: Copper
  • Other: Fiberglass, plastic, hard rubber, wood, stone
• Users who want a smoother finish from a double-cut burr (and fewer “why is it chewing like that?” moments)

Safety Tips / Best Practices

• Start slower and increase speed as needed—chipping usually means you’re too fast for the material
• Use light pressure and let the burr cut; forcing it shortens tool life
• Wear proper PPE: eye protection, hearing protection, respirator, and hand protection, and keep machine guards in place
• Avoid use on electric power drills; slower speeds can increase the chance of chipping the workpiece