For deburring tight metal contours, blending machining marks, and sanding hard-to-reach recesses, the United Abrasives 38300 Tapered Cartridge Roll offers concentrated abrasive cutting action in a compact, pointed profile. Featuring a 3/8" base diameter, 1" length, and 60-grit premium aluminum oxide abrasive, this cartridge roll is suited to coarse-to-intermediate sanding, flash removal, and localized surface preparation. Unlike straight cartridge rolls, its tapered shape narrows toward the tip, allowing operators to work more effectively in angled recesses, internal fillets, corners, and contoured metal features. The 60-grit abrasive provides useful material removal for addressing burrs and rough machining marks before progressing to finer finishing grades.
The United Abrasives 38300 features a multi-layer, self-dressing construction that exposes fresh cutting abrasive as successive layers wear away, helping 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. With a maximum operating speed of 26,000 RPM, the roll must be paired with appropriately rated equipment and securely mounted before operation. The compact 1" length provides control in localized sanding applications, while the tapered design helps reach areas where a full-diameter cylindrical roll may not fit. Suitable workpiece materials include ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel. The 38300 is supplied in a box of 100 for recurring deburring and finishing operations.
Type: Tapered Cartridge Roll | Part Number: 38300 | Abrasive Material: Premium Aluminum Oxide | Base Diameter: 3/8" | Length: 1" | Arbor: 1/8" | Grit: 60 | 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 deburring, sanding, and surface blending on ferrous and non-ferrous metal components.
- 60-grit abrasive provides coarse-to-intermediate cutting action for removing burrs, flash, and rough machining marks.
- Full-taper profile narrows toward the tip, helping operators reach angled recesses, corners, and contoured surfaces.
- 3/8" base diameter provides compact abrasive coverage for localized finishing in relatively narrow metal features.
- 1" length allows sanding within short channels, internal fillets, and confined recesses where a longer roll may restrict positioning.
- Multi-layer, self-dressing construction exposes fresh abrasive grain as successive layers wear away, helping maintain cutting effectiveness.
- 1/8" arbor configuration corresponds to the manufacturer-listed 95105 cartridge roll mandrel for properly matched mounting.
- Quick removal and installation facilitate abrasive replacement, while the box quantity of 100 supports routine inventory replenishment.
Applications:
- Precision machining - Removing burrs and blending machining marks in angled recesses, internal corners, and contoured metal openings.
- Tool and die manufacturing - Sanding accessible tooling cavities, tapered features, and internal fillets that benefit from a narrowing abrasive profile.
- Metal fabrication - Cleaning up localized cutting flash and smoothing rough edges in recessed or irregularly shaped metal features.
- Stainless steel and alloy steel processing - Performing localized deburring and preliminary surface preparation on stainless steel and high-tensile steel components.
- Industrial equipment maintenance - Refining accessible corners, recessed fittings, and small contoured areas on machinery components during repair.
FAQs:
- Q: What is the difference between a tapered and a straight cartridge roll?
A: A tapered cartridge roll narrows toward its tip, making it useful for angled recesses, corners, and contoured features. A straight cartridge roll maintains a cylindrical profile along its abrasive length and may provide more consistent contact on parallel side walls and straight grooves. - Q: How does United Abrasives 38300 compare with 38301?
A: Both have a 3/8" base diameter, 1" length, 1/8" arbor opening, and 26,000 RPM maximum speed. The 38300 uses 60-grit abrasive for greater material removal, while the 38301 uses finer 80-grit abrasive for intermediate sanding and surface refinement. - Q: Is the 38300 suitable for fine polishing?
A: Its 60-grit abrasive is intended primarily for deburring and initial surface preparation rather than producing a polished finish. For a smoother surface, progress through finer grit options according to the finishing requirements. - Q: Can United Abrasives 38300 be used on stainless steel?
A: Yes. United Abrasives identifies stainless steel and high-tensile steel as suitable materials, along with ferrous and non-ferrous metals. Use dedicated abrasives when preventing cross-contamination from carbon steel is important. - Q: Which mandrel is specified for United Abrasives part number 38300?
A: The United Abrasives 2025-2026 catalog lists mandrel part number 95105 for the 38300. The cartridge roll has a 1/8" arbor opening. Verify proper engagement, secure installation, shank compatibility, and applicable speed limits before use. - Q: What is the maximum operating speed and box quantity?
A: United Abrasives 38300 has a maximum operating speed of 26,000 RPM and is sold in a box of 100 tapered cartridge rolls. The selected rotary tool and mandrel must meet the manufacturer's speed 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
- 60
- RPM
- 26000
- Mandrel Part
- 95105
- Box of
- 100
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