United Abrasives Straight Cartridge Roll | 38047 | 3/8" Diameter | 50 Grit | Sold by Box of 100

For removing pronounced burrs, machining marks, and surface irregularities from narrow metal recesses, the United Abrasives 38047 Straight Cartridge Roll combines coarse abrasive cutting action with an extended cylindrical sanding surface. Featuring a 3/8" diameter, 1-1/2" length, and 50-grit premium aluminum oxide abrasive, this cartridge roll is suited to initial material removal and surface preparation in areas where larger abrasive wheels cannot easily reach. Its straight profile allows sanding along channels, fillets, recesses, side walls, and the bottoms of dead-end holes. The coarse 50-grit grain is particularly useful for removing surface imperfections before progressing to finer abrasive grits. United Abrasives identifies ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel as suitable workpiece materials.

The United Abrasives 38047 uses a multi-layer, self-dressing construction that progressively exposes fresh cutting abrasive as successive layers wear away, helping maintain effective cutting action during use. Its 1/8" arbor opening corresponds to the manufacturer-listed 95104 cartridge roll mandrel for mounting on compatible rotary tools. The 26,000 maximum RPM rating establishes the abrasive's operating speed limit and is an important consideration when selecting a die grinder and mandrel. Compared with shorter 3/8" cartridge rolls, the 1-1/2" length offers additional abrasive working surface along extended grooves and internal walls. Supplied in a box of 100, the 38047 supports repeated coarse sanding and deburring operations in machine shops, metal fabrication facilities, toolrooms, and maintenance departments.

Type: Straight Cartridge Roll | Part Number: 38047 | Abrasive Material: Premium Aluminum Oxide | Diameter: 3/8" | Length: 1-1/2" | Arbor: 1/8" | Grit: 50 | Max RPM: 26,000 | Mandrel Part Number: 95104 | Quantity: 100 per Box | Material Application: Ferrous Metals, Non-Ferrous Metals, Stainless Steel, High-Tensile Steel

Features:

• Premium aluminum oxide grain provides effective cutting action for sanding, deburring, and removing surface imperfections from metal workpieces.
• Coarse 50-grit abrasive supports initial stock removal, flash cleanup, and preparation of rough surfaces before finer finishing operations.
• 3/8" diameter provides access to recessed features while offering a broader abrasive working surface than smaller 1/4" cartridge rolls.
• 1-1/2" straight cylindrical profile extends abrasive contact along grooves, internal side walls, fillets, and elongated recesses.
• Multi-layer, self-dressing construction exposes sharp, new cutting abrasive as successive layers wear away, helping sustain material removal.
• Suitable for high-speed deburring and flash removal when operated within the manufacturer's specified maximum operating speed.
• Quick removal and installation simplify abrasive changes during repetitive surface preparation operations.
• Box quantity of 100 provides a consistent supply of cartridge rolls for ongoing machining, fabrication, and maintenance work.

Applications:

• Machine shops and CNC operations - Removing machining burrs and rough tool marks from accessible internal grooves, openings, and recessed features.
• Metal fabrication and welding - Cleaning up flash, blending rough metal areas, and preparing narrow channels for subsequent finishing.
• Tool and die manufacturing - Coarse sanding along internal fillets, extended recesses, and tooling contours requiring localized abrasive contact.
• Stainless steel and alloy steel processing - Initial deburring and surface preparation on stainless steel and high-tensile steel components.
• Industrial equipment repair - Removing localized surface irregularities and preparing recessed metal components for repair, inspection, or further finishing.

FAQs:

• Q: When should I use a 50-grit straight cartridge roll?
  A: A 50-grit roll is appropriate for coarse sanding, removing noticeable burrs, and cleaning up rough machining marks. If a smoother surface is required, follow with a finer grit after the initial material removal step.
• Q: How does the United Abrasives 38047 compare with the 38048 cartridge roll?
  A: Both have a 3/8" diameter and 1-1/2" length. The 38047 uses coarser 50-grit abrasive for more aggressive cutting, while the 38048 uses 60-grit abrasive for a somewhat finer sanding pattern.
• Q: Why choose a 1-1/2" cartridge roll instead of a 1" version?
  A: The longer abrasive surface can cover more of an extended internal wall or groove during sanding. The correct length depends on the available clearance, workpiece geometry, and the area requiring material removal.
• Q: What mandrel is specified for United Abrasives part number 38047?
  A: The United Abrasives 2025–2026 catalog lists mandrel part number 95104 for the 38047, which has a 1/8" arbor opening. Confirm mandrel fit, secure mounting, and compatible tool speed before operation.
• Q: Can this roll be used on stainless steel, and how many are included per box?
  A: United Abrasives lists stainless steel and high-tensile steel among the suitable materials. The 38047 is supplied in a box quantity of 100, and each cartridge roll has a maximum operating speed of 26,000 RPM. Keep abrasives used on stainless steel separate from those used on carbon steel when preventing cross-contamination is important.

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For help choosing the correct United Abrasives Straight Cartridge Rolls for your application, please call (800) 608-5210 or email info@intlairtool.com