For refining small internal corners, smoothing residual machining marks, and finishing contoured metal recesses, the United Abrasives 38302 Tapered Cartridge Roll provides fine abrasive cutting action in a compact, pointed configuration. Featuring a 3/8" base diameter, 1" length, and 120-grit premium aluminum oxide abrasive, this cartridge roll is suited to light deburring, scratch refinement, and localized surface blending after coarser sanding operations. Its full-taper design narrows toward the tip, helping operators reach angled channels, internal fillets, recessed corners, and irregularly shaped metal features where a straight cylindrical cartridge roll may offer limited access. The finer grit makes it particularly useful when surface refinement takes priority over aggressive material removal.
The United Abrasives 38302 incorporates a multi-layer, self-dressing construction, meaning successive abrasive layers expose fresh cutting grain as they wear away, helping maintain effective sanding action. 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 operating speed limit and must be considered when selecting a die grinder and mounting accessory. Its compact dimensions make it useful for controlled sanding in accessible confined features, while the tapered profile concentrates abrasive contact toward narrower workpiece areas. United Abrasives identifies ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel as suitable materials. The 38302 is supplied in a box of 100 for recurring metal finishing operations.
Type: Tapered Cartridge Roll | Part Number: 38302 | Abrasive Material: Premium Aluminum Oxide | Base Diameter: 3/8" | Length: 1" | Arbor: 1/8" | Grit: 120 | 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 abrasive grain supports fine sanding, light deburring, and surface blending on ferrous and non-ferrous metals.
- 120-grit abrasive helps reduce small machining marks and scratches left by earlier coarse or intermediate sanding operations.
- Full-taper design narrows toward the tip, providing access to angled recesses, internal corners, and contoured workpiece features.
- 3/8" base diameter offers a compact abrasive profile for finishing smaller openings and localized metal surfaces.
- 1" abrasive length helps operators position the roll within short recesses and confined areas where longer abrasives may restrict access.
- Multi-layer, self-dressing construction exposes fresh cutting abrasive as successive layers wear away, helping sustain sanding effectiveness.
- 1/8" arbor opening corresponds to manufacturer-listed cartridge roll mandrel 95105 for properly matched mounting.
- Quick removal and installation facilitate abrasive replacement, while the box quantity of 100 supports regular shop inventory replenishment.
Applications:
- Precision machining - Refining minor tool marks and lightly deburring angled openings, internal corners, and recessed machined features.
- Tool and die manufacturing - Finishing accessible tooling cavities, tapered contours, and small internal fillets requiring localized abrasive contact.
- Metal fabrication - Reducing residual scratches and smoothing contoured metal edges after initial cutting and deburring.
- Stainless steel and alloy steel finishing - Performing fine sanding on recessed stainless steel and high-tensile steel surfaces.
- Industrial maintenance and repair - Blending small surface imperfections on accessible machinery recesses, metal fittings, and contoured repair areas.
FAQs:
- Q: What is the difference between United Abrasives 38302 and 38301 Tapered Cartridge Rolls?
A: Both models have a 3/8" base diameter, 1" length, 1/8" arbor opening, and 26,000 RPM maximum operating speed. The 38302 uses finer 120-grit abrasive for surface refinement, while the 38301 uses 80-grit abrasive for intermediate sanding and greater material removal. - Q: When should I choose the 120-grit 38302 instead of the 60-grit 38300?
A: Choose the 38302 when smoothing scratches, refining small machining marks, and improving the finish of previously prepared surfaces. The 60-grit 38300 is better suited to removing more noticeable burrs, flash, and rough surface material. - Q: What advantage does the tapered profile provide?
A: The tapered shape narrows toward its tip, helping reach angled recesses, internal corners, and irregular contours. A straight cartridge roll maintains a cylindrical abrasive profile and is often more suitable for consistent sanding contact along parallel side walls. - Q: Can the United Abrasives 38302 be used on stainless steel?
A: Yes. United Abrasives identifies stainless steel and high-tensile steel as suitable workpiece materials, along with ferrous and non-ferrous metals. Use separate abrasives for stainless steel when preventing contamination from previous carbon steel work is important. - Q: Which mandrel is recommended for United Abrasives part number 38302?
A: The United Abrasives 20252026 catalog identifies mandrel part number 95105 for this tapered cartridge roll. The roll has a 1/8" arbor opening. Verify correct mounting engagement, secure installation, shank compatibility, and applicable speed limits before use. - Q: How many tapered cartridge rolls are supplied, and what is their maximum operating speed?
A: United Abrasives 38302 is sold in a box of 100 tapered cartridge rolls. The manufacturer specifies a maximum operating speed of 26,000 RPM. Both the rotary tool and the selected mandrel must meet the applicable operating and mounting 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
- 120
- RPM
- 26000
- Mandrel Part
- 95105
- Box of
- 100
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