United Abrasives Straight Cartridge Roll | 38019 | 1/4" Diameter | 240 Grit | Sold by Box of 100

When fine surface finishing is required along narrow grooves, internal walls, and recessed metal features, the United Abrasives 38019 Straight Cartridge Roll provides a compact abrasive solution for detailed sanding and surface refinement. Featuring a 1/4" diameter, 1-1/2" length, and 240-grit premium aluminum oxide abrasive, this cartridge roll is suited to smoothing light machining marks, reducing scratches left by coarser abrasives, and blending previously prepared metal surfaces. Its straight cylindrical profile allows controlled abrasive contact along channels, fillets, recesses, side walls, and the bottoms of dead-end holes. The fine 240-grit abrasive produces a more refined sanding pattern than 80- or 120-grit alternatives, making it particularly useful when surface finish is more important than aggressive stock removal.

The United Abrasives 38019 incorporates a multi-layer, self-dressing construction, which exposes sharp, fresh cutting abrasive as successive layers wear away to help maintain sanding effectiveness. Its 1/8" arbor opening accommodates a properly matched cartridge roll mandrel for installation on compatible rotary tools. The 26,000 maximum RPM rating establishes the abrasive's operating speed limit and must be considered when selecting equipment. Compared with shorter 1" cartridge rolls, the 1-1/2" length offers additional abrasive contact along elongated recesses without increasing the working diameter. Suitable for ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel, the 38019 is supplied in a box of 100 for recurring fine-finishing requirements in machining, fabrication, and maintenance operations.

Type: Straight Cartridge Roll | Part Number: 38019 | Abrasive Material: Premium Aluminum Oxide | Diameter: 1/4" | Length: 1-1/2" | Arbor: 1/8" | Grit: 240 | Max RPM: 26,000 | Quantity: 100 per Box | Material Application: Ferrous Metals, Non-Ferrous Metals, Stainless Steel, High-Tensile Steel

Features:

• Premium aluminum oxide abrasive grain supports detailed sanding, blending, and surface finishing on ferrous and non-ferrous metals.
• Fine 240-grit abrasive helps refine machining marks and reduce scratches remaining after intermediate sanding operations.
• 1/4" diameter allows access to narrow openings, internal grooves, and recessed workpiece features where larger abrasive accessories may not fit.
• 1-1/2" straight cylindrical configuration provides extended abrasive contact along channels, fillets, side walls, and elongated recesses.
• Multi-layer, self-dressing construction exposes fresh cutting abrasive as successive layers wear away, helping maintain effective sanding action.
• Suitable for light deburring and fine surface blending where controlled abrasive removal takes priority over aggressive cutting.
• Quick removal and installation facilitate abrasive changes during multi-stage metal finishing processes.
• Supplied in boxes of 100 to support scheduled abrasive replenishment and repeated finishing operations.

Applications:

• Precision machining and CNC finishing - Refining small machining marks and smoothing elongated internal grooves after initial deburring.
• Tool and die manufacturing - Finishing recessed contours, narrow fillets, and detailed tooling surfaces where controlled abrasive contact is necessary.
• Stainless steel fabrication - Performing fine sanding and scratch refinement on stainless steel and high-tensile steel components.
• Metal component production - Improving localized surface texture and reducing marks left by coarser abrasives before subsequent finishing steps.
• Industrial maintenance and repair - Cleaning up minor surface imperfections on metal fittings, machine components, and accessible recessed areas.

FAQs:

• Q: What is the difference between United Abrasives 38019 and 38017 Straight Cartridge Rolls?
  A: Both models feature a 1/4" diameter, 1-1/2" length, 1/8" arbor opening, and 26,000 RPM maximum operating speed. The 38019 uses finer 240-grit abrasive for surface refinement, while the 38017 uses 120-grit abrasive for more substantial sanding and light deburring.
• Q: Is 240 grit suitable for removing heavy burrs?
  A: The 240-grit configuration is primarily suited to fine sanding, scratch reduction, and light surface blending. For heavy burrs or deeper machining marks, use a coarser abrasive first and progress to the 38019 when a finer finish is required.
• Q: Can this cartridge roll be used on stainless steel?
  A: Yes. United Abrasives identifies stainless steel and high-tensile steel as suitable materials, along with ferrous and non-ferrous metals. For contamination-sensitive work, reserve separate abrasives for stainless steel rather than using rolls previously applied to carbon steel.
• Q: What type of mandrel is needed for the United Abrasives 38019?
  A: The cartridge roll has a 1/8" arbor opening and requires a compatible cartridge roll mandrel. Verify the manufacturer-recommended mandrel part number, mounting engagement, and rotary tool compatibility before ordering.
• Q: What is the maximum operating speed, and how many cartridge rolls are supplied?
  A: United Abrasives part number 38019 has a maximum operating speed of 26,000 RPM and is supplied in a box of 100 cartridge rolls. The power tool must not exceed the abrasive's rated speed, and the selected mandrel must also be suitable for the operating conditions.

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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