For deburring angled openings, removing machining marks, and preparing recessed metal surfaces, the United Abrasives 38338 Tapered Cartridge Roll combines effective material removal with a pointed abrasive profile. Featuring a 3/4" base diameter, 1-1/2" length, and 60-grit premium aluminum oxide abrasive, this cartridge roll is suited to coarse-to-intermediate sanding, flash removal, and blending rough metal contours. Its full-taper design narrows toward the tip, helping operators reach internal corners, fillets, tapered cavities, and irregular recesses where a straight cylindrical cartridge roll may be difficult to position. The 60-grit abrasive provides useful cutting action for removing burrs and surface irregularities while leaving a finer sanding pattern than coarser abrasive grades.
The United Abrasives 38338 features a multi-layer, self-dressing construction that exposes fresh, sharp abrasive grain as successive layers wear away, helping maintain effective sanding action during use. Its 1/8" arbor opening corresponds to the manufacturer-listed 95104 cartridge roll mandrel for appropriately matched mounting on compatible rotary equipment. With a maximum operating speed of 18,000 RPM, this larger-diameter tapered roll requires careful attention to tool speed, particularly when compared with smaller cartridge rolls rated for 26,000 RPM. The 3/4" base diameter provides useful abrasive coverage on accessible recessed surfaces, while the 1-1/2" length allows contact along angled contours where sufficient clearance is available. Suitable workpiece materials include ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel. The 38338 is sold in a box of 100.
Type: Tapered Cartridge Roll | Part Number: 38338 | Abrasive Material: Premium Aluminum Oxide | Base Diameter: 3/4" | Length: 1-1/2" | Arbor: 1/8" | Grit: 60 | Max RPM: 18,000 | 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 sanding, deburring, and surface blending on ferrous and non-ferrous metal components.
- 60-grit abrasive provides coarse-to-intermediate cutting action for removing machining burrs, flash, and rough surface marks.
- Full-taper profile narrows toward the tip, helping reach angled recesses, internal corners, fillets, and irregular workpiece contours.
- 3/4" base diameter provides a broader abrasive working surface near the base while allowing more focused contact toward the tapered end.
- 1-1/2" abrasive length supports sanding along recessed contours and angled surfaces where adequate working clearance is available.
- Multi-layer, self-dressing construction exposes fresh cutting grain as successive abrasive layers wear away.
- 1/8" arbor opening corresponds to the manufacturer-listed 95104 cartridge roll mandrel for correctly matched mounting.
- Quick removal and installation help facilitate abrasive replacement, while the box quantity of 100 supports recurring metalworking operations.
Applications:
- Machining and CNC operations Removing burrs and blending tool marks around angled openings, recessed pockets, and machined internal contours.
- Tool and die manufacturing Sanding accessible tooling cavities, tapered features, and internal fillets requiring a narrowing abrasive shape.
- Metal fabrication Cleaning up localized cutting flash and smoothing rough edges inside contoured metal features before finer finishing.
- Stainless steel and alloy steel processing Performing localized deburring and surface preparation on stainless steel and high-tensile steel components.
- Industrial equipment maintenance Refining accessible recessed fittings, angled internal surfaces, and contoured metal repair areas.
FAQs:
- Q: What is the difference between United Abrasives 38338 and 38339 Tapered Cartridge Rolls?
A: Both models have a 3/4" base diameter, 1-1/2" length, 1/8" arbor opening, and 18,000 RPM maximum operating speed. The 38338 uses 60-grit abrasive for greater material removal, while the 38339 uses finer 80-grit abrasive for intermediate sanding and surface refinement. - Q: When should I choose a 3/4" tapered cartridge roll instead of a 1/2" version?
A: The 3/4" base diameter provides additional abrasive contact on wider recessed surfaces and contoured openings. A smaller 1/2" roll may be preferable where limited clearance makes the larger profile difficult to position. - Q: What advantage does the full-taper profile provide?
A: The roll narrows toward its tip, allowing the abrasive to reach angled corners, internal fillets, and irregular recesses. Straight cartridge rolls maintain a uniform cylindrical profile and may be more appropriate for sanding parallel side walls and straight channels. - Q: Can the United Abrasives 38338 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 cross-contamination from previous carbon steel work is important.
- Q: Which mandrel is recommended for part number 38338?
A: The United Abrasives 2025-2026 catalog table identifies mandrel part number 95104 for this 1/8" arbor, 1-1/2" long tapered cartridge roll. Confirm secure engagement, correct shank fit, and operating speed compatibility before use. - Q: Can the 38338 be used with a 25,000 RPM die grinder?
A: No. The 38338 has a maximum operating speed of 18,000 RPM. Do not mount it on a power tool whose maximum rated speed exceeds the cartridge roll's rating, even if the tool has adjustable speed. Select a suitably rated tool and mandrel. - Q: How many tapered cartridge rolls are supplied in a box?
A: United Abrasives part number 38338 is sold in a box of 100 tapered cartridge rolls. Confirm whether a mounting mandrel is supplied before assuming an accessory is included.
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.)
- 3/4
- Length (in.)
- 1-1/2
- Arbor Hole (in.)
- 1/8
- Grit
- 60
- RPM
- 18000
- Mandrel Part
- 95104
- Box of
- 100
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