United Abrasives Tapered Cartridge Roll | 38319 | 1/2" Diameter | 60 Grit | Sold by Box of 100

For removing machining burrs, blending uneven edges, and preparing angled recesses on metal components, the United Abrasives 38319 Tapered Cartridge Roll provides coarse-to-intermediate sanding action with a narrow, pointed working profile. Featuring a 1/2" base diameter, 1-1/2" length, and 60-grit premium aluminum oxide abrasive, this roll is suited to localized deburring, flash removal, and surface preparation before finer finishing. Its full-taper shape narrows toward the tip, allowing operators to work along internal fillets, intersecting surfaces, tapered openings, and recessed contours where a straight cylindrical roll may be difficult to position. The 60-grit abrasive balances material removal with a finer scratch pattern than the coarser 50-grit alternative.

The United Abrasives 38319 uses a multi-layer, self-dressing construction, meaning fresh cutting abrasive is exposed as successive layers wear away to help maintain sanding effectiveness. Its 1/8" arbor opening corresponds to the manufacturer-listed 95104 cartridge roll mandrel for compatible mounting. The 26,000 RPM maximum operating speed establishes the upper speed limit for the abrasive and must be considered when selecting a die grinder and mounting accessory. Compared with the shorter 38312 model, its 1-1/2" abrasive length provides additional working contact along extended angled recesses where sufficient clearance is available. Suitable workpiece materials include ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel. The 38319 is supplied in a box of 100 for recurring machining, fabrication, and maintenance applications.

Type: Tapered Cartridge Roll | Part Number: 38319 | Abrasive Material: Premium Aluminum Oxide | Base Diameter: 1/2" | Length: 1-1/2" | Arbor: 1/8" | Grit: 60 | Max RPM: 26,000 | Recommended Mandrel: 95104 | Quantity: 100 per Box | Material Application: Ferrous Metals, Non-Ferrous Metals, Stainless Steel, High-Tensile Steel

Features:

• Premium aluminum oxide abrasive grain supports deburring, sanding, and surface blending on ferrous and non-ferrous metal components.
• 60-grit abrasive provides cutting action for removing machining burrs, localized flash, and rough surface marks before finer finishing operations.
• Full-taper configuration narrows toward the tip to help reach angled recesses, internal corners, fillets, and irregular metal contours.
• 1/2" base diameter provides useful abrasive contact near the wider end of the roll while allowing more focused sanding toward the tip.
• 1-1/2" abrasive length supports work along extended recessed contours where adequate clearance is available.
• Multi-layer, self-dressing construction exposes fresh abrasive grain as successive layers wear away, helping sustain cutting effectiveness.
• 1/8" arbor configuration corresponds to manufacturer-listed cartridge roll mandrel 95104 for appropriately matched mounting.
• Quick removal and installation facilitate abrasive replacement, while the box quantity of 100 supports routine replenishment.

Applications:

• Machining and CNC operations - Removing burrs and blending cutter marks around angled openings, recessed pockets, and internal fillets.
• Tool and die manufacturing - Sanding accessible tooling cavities, tapered features, and elongated recessed contours requiring localized abrasive contact.
• Metal fabrication - Cleaning up cutting flash and smoothing rough edges around contoured metal components before further finishing.
• Stainless steel and alloy steel processing - Performing localized deburring and initial surface preparation on stainless steel and high-tensile steel workpieces.
• Industrial equipment maintenance - Preparing recessed fittings, accessible internal corners, and irregular metal repair areas for refurbishment.

FAQs:

• Q: How does United Abrasives 38319 differ from 38318?
  A: Both tapered cartridge rolls have a 1/2" base diameter, 1-1/2" length, 1/8" arbor opening, and 26,000 RPM maximum operating speed. The 38319 uses 60-grit abrasive for coarse-to-intermediate sanding, while the 38318 uses coarser 50-grit abrasive for more aggressive material removal.
• Q: What is the difference between the 38319 and 38312?
  A: Both models feature a 1/2" base diameter, 60-grit abrasive, and 1/8" arbor opening. The 38319 is 1-1/2" long, compared with the 1" length of the 38312. The longer roll provides additional abrasive contact in accessible recessed features.
• Q: Should I choose the 60-grit 38319 or the 80-grit 38320?
  A: Choose the 38319 when burr removal and cutting action are the primary concerns. The finer 80-grit 38320 is better suited to intermediate sanding and reducing marks left by coarser surface preparation.
• Q: Why use a tapered cartridge roll instead of a straight cartridge roll?
  A: A tapered roll narrows toward its tip, helping the abrasive reach angled corners and irregular contours. Straight rolls maintain a uniform cylindrical surface and may provide more consistent contact along parallel side walls and straight grooves.
• Q: Is United Abrasives 38319 suitable for stainless steel?
  A: Yes. United Abrasives identifies stainless steel and high-tensile steel among its suitable workpiece materials, along with ferrous and non-ferrous metals. Use dedicated abrasives when preventing cross-contamination from previous carbon steel work is important.
• Q: Which mandrel and speed rating apply to SKU 38319?
  A: The United Abrasives 2025-2026 catalog lists mandrel part number 95104 for this 1/8" arbor, 1-1/2" long tapered cartridge roll. The maximum operating speed is 26,000 RPM. Confirm secure mounting, shank compatibility, and applicable speed ratings before operation.

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