United Abrasives Straight Cartridge Roll | 38056 | 3/8" Diameter | 80 Grit | Sold by Box of 100

For sanding deeper narrow channels and refining machining marks along recessed metal surfaces, the United Abrasives 38056 Straight Cartridge Roll combines a slim cylindrical profile with an extended abrasive working length. This model features a 3/8" diameter, 2" length, and 80-grit premium aluminum oxide abrasive, making it a practical choice for intermediate sanding, light deburring, and blending surfaces after initial material removal. The straight profile provides access to internal fillets, elongated grooves, side walls, and the bottoms of accessible dead-end holes. Its 80-grit grain offers a finer sanding pattern than the corresponding 60-grit roll, helping operators refine rough tool marks without moving immediately to a fine finishing abrasive.

United Abrasives uses a multi-layer, self-dressing construction, in which fresh cutting grain becomes exposed as the outer abrasive layers wear away. This helps maintain effective sanding action throughout the roll's use. The 1/8" arbor opening accommodates an appropriately matched cartridge roll mandrel, while the 26,000 RPM maximum operating speed provides a defined upper speed limit for tool selection. Compared with shorter 3/8" diameter cartridge rolls, the 2" abrasive length offers additional contact along extended internal walls where working clearance permits. Supplied in a box of 100, the 38056 is well suited to recurring sanding and surface preparation tasks in machine shops, fabrication facilities, and toolrooms.

Type: Straight Cartridge Roll | Part Number: 38056 | Abrasive Material: Premium Aluminum Oxide | Diameter: 3/8" | Length: 2" | Arbor: 1/8" | Grit: 80 | Max RPM: 26,000 | Recommended Mandrel: 95103 | Quantity: 100 per Box | Material Application: Ferrous Metals, Non-Ferrous Metals, Stainless Steel, High-Tensile Steel

Features:

• Premium aluminum oxide abrasive grain is suitable for sanding and blending ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel.
• 80-grit abrasive provides intermediate cutting action for reducing residual burrs, machining marks, and scratches left by coarser abrasives.
• 3/8" diameter fits relatively narrow grooves and recessed features while maintaining a useful cylindrical sanding surface.
• Extended 2" abrasive length allows contact along longer internal walls and channels when the workpiece provides adequate clearance.
• Straight construction enables sanding of fillets, side walls, recesses, and the bottoms of accessible dead-end holes.
• Multi-layer, self-dressing design exposes sharp, new abrasive as successive layers wear away.
• Quick removal and installation facilitate roll changes during repetitive finishing operations.
• Box quantity of 100 supports planned abrasive replenishment for regular metalworking applications.

Applications:

• Machining and CNC finishing - Blending cutter marks and light burrs along elongated internal grooves and machined channels.
• Tool and die work - Refining recessed contours, narrow tooling features, and accessible internal fillets.
• Metal fabrication - Smoothing localized rough edges and preparing recessed metal surfaces after initial cutting or deburring.
• Stainless steel component finishing - Performing intermediate sanding on stainless steel and high-tensile steel surfaces where the roll's diameter and length fit.
• Equipment repair - Refining small imperfections in accessible internal passages, metal fittings, and machinery recesses.

FAQs:

• Q: How does United Abrasives 38056 differ from 38055?
  A: Both have a 3/8" diameter, 2" length, 1/8" arbor, and 26,000 RPM maximum speed. The 38056 uses 80-grit abrasive for a finer sanding pattern, while the 38055 uses 60-grit for more aggressive material removal.
• Q: Why choose the 2" long 38056 instead of a shorter cartridge roll?
  A: The extended abrasive length provides additional contact along elongated internal surfaces. A shorter roll may be easier to position in shallow recesses or features with restricted working clearance.
• Q: Is the 38056 suitable for heavy stock removal?
  A: Its 80-grit abrasive is better suited to intermediate sanding, minor burr removal, and surface blending. For significant stock removal or pronounced burrs, a coarser grit may be preferable before finishing with the 38056.
• Q: Can this cartridge roll be used on stainless steel?
  A: Yes. United Abrasives identifies stainless steel and high-tensile steel as suitable applications. When cross-contamination is a concern, use a roll dedicated to stainless steel rather than one previously used on carbon steel.
• Q: Which mandrel is specified for SKU 38056?
  A: The United Abrasives 2025–2026 catalog lists mandrel part number 95103 for the 3/8" diameter, 2" long, 1/8" arbor configuration. Check the mandrel's shank fit, mounting engagement, and speed compatibility before use.
• Q: How is the 38056 packaged?
  A: Part number 38056 is sold in a box of 100 cartridge rolls. Whether a mandrel is included with the package has not been confirmed.

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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