🔧 Flat End Abrasive Sanding Caps – For Cylindrical Base & Recessed Area Finishing

CIBO Flat End Abrasive Caps are expertly designed for sanding the bases of cylinders, hollow recesses, and other flat-bottomed surfaces in tight or awkward spaces. Used with expanding rubber mandrels on die-grinders, drills, or rotary tools like Dremels, they provide reliable performance in a wide range of precision sanding and shaping tasks.

Crafted from durable aluminium oxide abrasive, these caps are effective on steel, cast iron, hardwood, and at lower speeds, also suitable for aluminium alloys. Their straight cylindrical shape with a flat end enables users to sand both the base and the sidewall of internal cavities — making them ideal for tool manufacturing, engine porting, sculpture, and mould finishing.

✅ Key Features:

• Flat end design ideal for sanding cylinder bases and deep recesses

• Suitable for ferrous metals, hardwoods, and aluminium alloys (at lower speeds)

• Use with expanding rubber mandrels for secure, stable rotation

• Ideal for both side-face and end-face sanding

• Compatible with rotary tools using 3mm or 6mm collet mandrels

• Used in automotive, toolmaking, casting cleanup, and fine detailing

🛠️ Common Applications:

• Engine casting finishing and cylinder prep

• Tool and die manufacturing

• Model making & sculpture detailing

• Mould and internal cavity sanding

• Smoothing welds or cast features in narrow areas

• General-purpose metal or wood finishing

📐 Specifications:

• Shape: Cylindrical with flat end

• Abrasive Type: Aluminium oxide blend – for general-purpose sanding

• Available Grades:

  • Grade 80 (Medium) – For effective material removal

  • Grade 150 (Fine) – For detailed and refined finishing

• Tool Compatibility:

  • Use with expanding rubber mandrels (sold separately)

  • Mandrels fit standard 3mm or 6mm collets depending on size

  • Compatible with Dremels, drills, rotary tools, and air die-grinders

• Usage Tip: Run at reduced speeds when working on aluminium to avoid clogging

• Pack Size: Sold in packs of 100 caps

💡 Pro Tips:

• Match cap size precisely to your expanding rubber mandrel for optimal grip

• Use Grade 80 for bulk smoothing and prep work

• Use Grade 150 for detail refinement and pre-polish finishing

• Always wear eye protection and dust control when using rotary abrasives

• For soft materials like plastic or aluminium, use low pressure and slow RPM

Finish internal bases, hollows, and hard-to-reach areas with precision using CIBO Flat End Abrasive Caps—perfect for clean, controlled sanding in tight spaces.

• Mandrels available here