For refining machining marks along deeper angled recesses, smoothing internal fillets, and finishing contoured metal surfaces, the United Abrasives 38328 Tapered Cartridge Roll combines fine abrasive cutting action with an extended, narrowing profile. Featuring a 1/2" base diameter, 2" length, and 120-grit premium aluminum oxide abrasive, this roll is suited to light deburring, scratch reduction, and localized surface blending after coarser abrasive operations. Its full-taper design narrows toward the tip, helping operators reach angled channels, recessed corners, and irregular contours where straight cylindrical cartridge rolls may not provide suitable contact. The finer 120-grit abrasive is particularly useful when improving surface finish takes priority over aggressive material removal.
The United Abrasives 38328 incorporates a multi-layer, self-dressing construction, meaning fresh cutting abrasive is exposed as successive layers wear away, helping maintain effective sanding action. Its 1/8" arbor opening corresponds to the manufacturer-listed 95103 cartridge roll mandrel for appropriately matched mounting. The 26,000 RPM maximum operating speed establishes the abrasive's upper speed limit and must be considered when selecting a rotary tool and mounting accessory. Compared with the shorter 38322 model, the 2" abrasive length provides additional working contact along extended angled surfaces where clearance permits. Suitable workpiece materials include ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel. The 38328 is supplied in a box of 100 for recurring machining, toolroom, fabrication, and maintenance applications.
Type: Tapered Cartridge Roll | Part Number: 38328 | Abrasive Material: Premium Aluminum Oxide | Base Diameter: 1/2" | Length: 2" | Arbor: 1/8" | Grit: 120 | 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 supports fine sanding, light deburring, and surface blending on ferrous and non-ferrous metals.
- 120-grit abrasive helps reduce minor machining marks and scratches remaining after coarse or intermediate sanding operations.
- Full-taper design narrows toward the tip for more focused abrasive contact inside angled recesses, internal corners, and contoured metal features.
- 1/2" base diameter provides abrasive coverage on accessible surfaces while the tapered end reaches narrower areas.
- Extended 2" abrasive length provides additional contact along elongated fillets and recessed contours where sufficient working clearance is available.
- Multi-layer, self-dressing construction reveals fresh cutting grain as successive abrasive layers wear away.
- 1/8" arbor opening corresponds to the manufacturer-listed 95103 cartridge roll mandrel for correctly matched mounting.
- Quick removal and installation facilitate abrasive replacement, while boxes of 100 support recurring finishing operations and planned inventory replenishment.
Applications:
- Precision machining and CNC finishing Refining residual tool marks around angled pockets, internal fillets, and extended recessed contours.
- Tool and die manufacturing Finishing accessible tapered cavities, tooling corners, and elongated internal features following initial deburring.
- Metal fabrication Reducing scratches and blending localized surface imperfections around irregularly shaped metal openings.
- Stainless steel and alloy steel finishing Performing fine sanding on recessed stainless steel and high-tensile steel components.
- Equipment maintenance and repair Smoothing minor imperfections inside accessible contoured fittings, machinery recesses, and metal repair areas.
FAQs:
- Q: How does United Abrasives 38328 differ from 38327? A: Both models have a 1/2" base diameter, 2" length, 1/8" arbor opening, and 26,000 RPM maximum operating speed. The 38328 uses finer 120-grit abrasive for surface refinement, while the 38327 uses 80-grit abrasive for intermediate sanding and greater material removal.
- Q: What is the difference between the 38328 and shorter 38322? A: Both models feature a 1/2" base diameter and 120-grit aluminum oxide abrasive. The 38328 measures 2" long and uses the manufacturer-listed 95103 mandrel, while the 38322 is 1-1/2" long and lists mandrel 95104. Select the length based on workpiece geometry and available clearance.
- Q: Is the 38328 appropriate for removing heavy machining burrs? A: Its 120-grit abrasive is better suited to light deburring and refining surfaces after initial material removal. For pronounced burrs or rough machining marks, a coarser option such as the 60-grit 38326 may be more suitable before progressing to the 38328.
- Q: Why select a tapered cartridge roll instead of a straight roll? A: The tapered profile narrows toward its tip, helping the abrasive reach angled corners, internal fillets, and irregular recesses. Straight cartridge rolls maintain a uniform cylindrical profile and may be preferable when sanding parallel side walls or straight channels.
- Q: Can United Abrasives 38328 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 dedicated abrasives when preventing contamination from previous carbon steel work is important.
- Q: Which mandrel is recommended for United Abrasives part number 38328? A: The United Abrasives 20252026 catalog lists mandrel part number 95103 for the 1/8" arbor, 2" long tapered cartridge roll. Check secure engagement, tool shank compatibility, and operating speed requirements before mounting.
- Q: How many cartridge rolls are supplied, and what is the maximum operating speed? A: United Abrasives 38328 is sold in a box of 100 tapered cartridge rolls. Its maximum operating speed is 26,000 RPM, and the selected power tool and mandrel must comply with the manufacturer's speed and mounting instructions.
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.)
- 1/2
- Length (in.)
- 2
- Arbor Hole (in.)
- 1/8
- Grit
- 120
- RPM
- 26000
- Mandrel Part
- 95103
- Box of
- 100
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