United Abrasives Straight Cartridge Roll | 38089 | 1/2" Diameter | 120 Grit | Sold by Box of 100

When fine surface refinement is required along extended grooves, internal channels, and recessed metal features, the United Abrasives 38089 Straight Cartridge Roll offers controlled sanding in a compact, elongated cylindrical design. Featuring a 1/2" diameter, 2" length, and 120-grit premium aluminum oxide abrasive, this roll is suited to light deburring, reducing machining marks, and smoothing surfaces after coarser abrasive operations. Its straight profile allows operators to work along fillets, internal side walls, recesses, and the bottoms of accessible dead-end holes where conventional sanding discs may not provide suitable access. The finer 120-grit abrasive helps reduce visible sanding scratches without requiring a larger abrasive contact area.

The United Abrasives 38089 features a multi-layer, self-dressing construction, which exposes sharp, fresh abrasive grain as successive layers wear away to help maintain cutting action. An important distinction is its 3/16" arbor opening, compared with the 1/8" arbor on the similarly sized 38083 model. This larger opening requires a correspondingly sized cartridge roll mandrel for secure installation. The 26,000 RPM maximum operating speed establishes the abrasive's upper speed limit, while the extended 2" length provides contact along longer internal surfaces where sufficient clearance is available. Suitable for ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel, the 38089 is supplied in a box of 100 for recurring precision sanding and metal finishing operations.

Type: Straight Cartridge Roll | Part Number: 38089 | Abrasive Material: Premium Aluminum Oxide | Diameter: 1/2" | Length: 2" | Arbor: 3/16" | Grit: 120 | Max RPM: 26,000 | Quantity: 100 per Box | Material Application: Ferrous Metals, Non-Ferrous Metals, Stainless Steel, High-Tensile Steel

Features:

• Premium aluminum oxide grain provides fine abrasive cutting action for surface refinement, light deburring, and blending metal components.
• 120-grit abrasive helps reduce minor machining marks and scratches left by earlier coarse or intermediate sanding operations.
• 1/2" diameter permits access to relatively narrow channels while providing a useful cylindrical sanding surface.
• Extended 2" abrasive length allows contact along elongated internal walls and grooves when sufficient working clearance is available.
• Straight cartridge roll design is suited to sanding internal fillets, recesses, side walls, and the bottoms of accessible dead-end holes.
• Multi-layer, self-dressing construction exposes fresh cutting abrasive as successive outer layers wear away.
• 3/16" arbor opening provides a mounting configuration distinct from similar rolls with 1/8" openings, making mandrel selection important.
• Quick removal and installation support efficient abrasive changes, while the box quantity of 100 facilitates regular inventory replenishment.

Applications:

• Precision machining and CNC finishing - Refining cutter marks and lightly deburring extended internal grooves after initial machining.
• Tool and die manufacturing - Smoothing accessible tooling recesses, internal fillets, and elongated contours requiring localized abrasive contact.
• Metal fabrication - Reducing residual scratches and blending recessed metal surfaces following coarser sanding operations.
• Stainless steel and alloy steel finishing - Performing fine sanding on stainless steel and high-tensile steel components where the roll's dimensions provide suitable access.
• Industrial equipment maintenance - Refining minor imperfections inside accessible metal fittings, machinery channels, and recessed repair areas.

FAQs:

• Q: How does United Abrasives 38089 compare with 38083?
  A: Both models have a 1/2" diameter, 2" length, 120-grit aluminum oxide abrasive, and a maximum operating speed of 26,000 RPM. The key difference is the arbor opening: the 38089 uses a 3/16" arbor, while the 38083 uses a 1/8" arbor. Choose the configuration that matches the appropriate mandrel.
• Q: What is the difference between the 38089 and 38088 cartridge rolls?
  A: Both models have the same diameter, length, arbor opening, and maximum RPM. The 38089 uses finer 120-grit abrasive for surface refinement, whereas the 38088 uses 80-grit abrasive for intermediate sanding and greater material removal.
• Q: Is the 38089 intended for heavy burr removal?
  A: The 120-grit abrasive is better suited to removing minor burrs, refining machining marks, and improving surfaces after coarser sanding. For pronounced burrs or substantial stock removal, begin with a coarser abrasive.
• Q: Can the United Abrasives 38089 be used on stainless steel?
  A: Yes. United Abrasives lists stainless steel and high-tensile steel among the suitable materials, along with ferrous and non-ferrous metals. When preventing cross-contamination is important, use abrasives reserved for stainless steel rather than rolls previously used on carbon steel.
• Q: What mandrel does the 38089 require?
  A: The 38089 has a 3/16" arbor opening and requires a correctly matched cartridge roll mandrel. Verify the manufacturer's recommended mandrel part number, engagement for the 2" abrasive length, shank fit, and speed compatibility before ordering.
• Q: How many cartridge rolls are supplied, and what is their speed rating?
  A: SKU 38089 is sold in a box of 100 straight cartridge rolls. The manufacturer specifies a maximum operating speed of 26,000 RPM, and both the tool and mandrel must be appropriate for the abrasive's operating requirements.

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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