For smoothing machining marks, removing small burrs, and blending metal surfaces inside angled recesses, the United Abrasives 38301 Tapered Cartridge Roll combines a compact abrasive profile with intermediate-grit cutting action. Featuring a 3/8" base diameter, 1" length, and 80-grit premium aluminum oxide abrasive, this roll is designed for deburring, sanding, and surface refinement in confined metalworking areas. Its full-taper shape narrows toward the tip, helping operators reach internal corners, fillets, channels, and contoured recesses that may be difficult to approach with a straight cylindrical roll. The 80-grit abrasive produces a finer sanding pattern than the coarser 60-grit alternative while retaining useful cutting action for reducing residual machining marks.
The United Abrasives 38301 incorporates a multi-layer, self-dressing construction, meaning fresh, sharp cutting abrasive is exposed as successive layers wear away. This helps maintain effective sanding action throughout use. Its 1/8" arbor opening corresponds to the manufacturer-listed 95105 cartridge roll mandrel for mounting on compatible rotary tools. The 26,000 RPM maximum operating speed establishes the abrasive's upper speed limit, while the short 1" profile supports localized sanding in accessible confined features. United Abrasives identifies ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel as suitable workpiece materials. The 38301 is supplied in a box of 100 for recurring machining, fabrication, and toolroom finishing operations.
Type: Tapered Cartridge Roll | Part Number: 38301 | Abrasive Material: Premium Aluminum Oxide | Base Diameter: 3/8" | Length: 1" | Arbor: 1/8" | Grit: 80 | Max RPM: 26,000 | Recommended Mandrel: 95105 | Quantity: 100 per Box | Material Application: Ferrous Metals, Non-Ferrous Metals, Stainless Steel, High-Tensile Steel
Features:
- Premium aluminum oxide grain provides abrasive cutting action for deburring, sanding, and blending ferrous and non-ferrous metal surfaces.
- 80-grit abrasive helps reduce minor burrs and machining marks while leaving a finer scratch pattern than 60-grit alternatives.
- Full-taper profile narrows toward the tip for access to angled recesses, internal corners, fillets, and contoured metal features.
- 3/8" base diameter provides a compact abrasive working area for localized finishing in smaller openings.
- 1" abrasive length suits short recesses and confined features where a longer cartridge roll may limit positioning.
- Multi-layer, self-dressing construction exposes fresh abrasive grain as successive layers wear away, helping maintain cutting effectiveness.
- 1/8" arbor opening corresponds to the manufacturer-listed 95105 cartridge roll mandrel for appropriately matched mounting.
- Quick removal and installation facilitate abrasive changes, while the box quantity of 100 supports regular inventory replenishment.
Applications:
- Precision machining - Blending cutter marks and removing minor burrs from angled openings, internal corners, and recessed machined features.
- Tool and die manufacturing - Refining accessible tooling cavities, tapered contours, and internal fillets that benefit from a narrowing abrasive shape.
- Metal fabrication - Smoothing localized edges and reducing surface irregularities after initial cutting or coarse deburring.
- Stainless steel and alloy steel finishing - Performing intermediate sanding on recessed stainless steel and high-tensile steel components.
- Equipment repair and maintenance - Refining small contoured areas and accessible recesses on metal fittings and machinery components.
FAQs:
- Q: How does United Abrasives 38301 differ from 38300?
A: Both models have a 3/8" base diameter, 1" length, 1/8" arbor opening, and 26,000 RPM maximum operating speed. The 38301 uses 80-grit abrasive for intermediate sanding and surface refinement, while the 38300 uses coarser 60-grit abrasive for greater material removal. - Q: When should I choose a tapered cartridge roll instead of a straight cartridge roll?
A: A tapered cartridge roll narrows toward the tip, making it useful for sanding angled recesses, internal corners, and irregular contours. Straight cartridge rolls maintain a cylindrical abrasive profile and are often better suited to consistent contact along parallel side walls and straight grooves. - Q: Is the United Abrasives 38301 suitable for heavy burr removal?
A: Its 80-grit abrasive is better suited to light deburring, intermediate sanding, and blending marks left by previous machining or coarser sanding. For pronounced burrs or heavier material removal, a coarser grade may be more appropriate. - Q: Can the 38301 tapered cartridge roll 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. Use abrasives dedicated to stainless steel when preventing contamination from earlier carbon steel work is important. - Q: Which mandrel is specified for United Abrasives part number 38301?
A: The United Abrasives 2025-2026 catalog identifies mandrel part number 95105 for this configuration. The roll has a 1/8" arbor opening. Verify correct mounting engagement, shank fit, and applicable speed limits before use. - Q: What are the packaging quantity and maximum operating speed?
A: The United Abrasives 38301 is sold in a box of 100 tapered cartridge rolls. Each roll has a maximum operating speed of 26,000 RPM, and the selected rotary tool and mandrel must meet the manufacturer's mounting and speed requirements.
Available Variations and Specifications
| SKU (Qty 100) |
Base Dia | Length | Arbor | Grit | Max RPM | Mandrel Part # |
|---|---|---|---|---|---|---|
| 38300 | 3/8" | 1" | 1/8" | 60 | 26,000 | 95105 |
| 38301 | 3/8" | 1" | 1/8" | 80 | 26,000 | 95105 |
| 38302 | 3/8" | 1" | 1/8" | 120 | 26,000 | 95105 |
| 38306 | 3/8" | 1-1/2" | 1/8" | 60 | 26,000 | 95104 |
| 38307 | 3/8" | 1-1/2" | 1/8" | 80 | 26,000 | 95104 |
| 38308 | 3/8" | 1-1/2" | 1/8" | 120 | 26,000 | 95104 |
| 38312 | 1/2" | 1" | 1/8" | 60 | 26,000 | 95105 |
| 38313 | 1/2" | 1" | 1/8" | 80 | 26,000 | 95105 |
| 38314 | 1/2" | 1" | 1/8" | 120 | 26,000 | 95105 |
| 38318 | 1/2" | 1-1/2" | 1/8" | 50 | 26,000 | 95104 |
| 38319 | 1/2" | 1-1/2" | 1/8" | 60 | 26,000 | 95104 |
| 38320 | 1/2" | 1-1/2" | 1/8" | 80 | 26,000 | 95104 |
| 38322 | 1/2" | 1-1/2" | 1/8" | 120 | 26,000 | 95104 |
| 38326 | 1/2" | 2" | 1/8" | 60 | 26,000 | 95103 |
| 38327 | 1/2" | 2" | 1/8" | 80 | 26,000 | 95103 |
| 38328 | 1/2" | 2" | 1/8" | 120 | 26,000 | 95103 |
| 38332 | 5/8" | 2" | 1/8" | 60 | 18,000 | 95103 |
| 38333 | 5/8" | 2" | 1/8" | 80 | 18,000 | 95103 |
| 38338 | 3/4" | 1-1/2" | 1/8" | 60 | 18,000 | 95104 |
| 38339 | 3/4" | 1-1/2" | 1/8" | 80 | 18,000 | 95104 |
| 38340 | 3/4" | 1-1/2" | 1/8" | 120 | 18,000 | 95104 |
| 38344 | 3/4" | 2" | 3/16" | 60 | 18,000 | 95106 |
| 38345 | 3/4" | 2" | 3/16" | 80 | 18,000 | 95106 |
| 38346 | 3/4" | 2" | 3/16" | 120 | 18,000 | 95106 |
Looking for more information about United Abrasives Tapered Cartridge Roll? For help choosing the correct United Abrasives Tapered Cartridge Rolls for your application, please call (800) 608-5210 or email info@intlairtool.com
- Type
- Tapered Cartridge Roll
- Diameter (in.)
- 3/8
- Length (in.)
- 1
- Arbor Hole (in.)
- 1/8
- Grit
- 80
- RPM
- 26000
- Mandrel Part
- 95105
- Box of
- 100
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