When coarse deburring requires access to angled recesses, internal corners, and narrow metal contours, the United Abrasives 38318 Tapered Cartridge Roll provides aggressive abrasive cutting action in a compact, pointed configuration. Featuring a 1/2" base diameter, 1-1/2" length, and 50-grit premium aluminum oxide abrasive, this roll is designed for removing machining burrs, flash, and rough surface marks before finer finishing operations. Its full-taper profile narrows toward the tip, helping operators sand internal fillets, intersecting surfaces, tapered cavities, and recessed edges where a straight cylindrical roll may not reach effectively. The 50-grit abrasive offers greater material removal than finer 60-, 80-, and 120-grit versions, making it especially useful for initial surface preparation.
The United Abrasives 38318 uses a multi-layer, self-dressing construction, meaning fresh cutting abrasive is exposed 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 a rotary tool. The 26,000 RPM maximum operating speed establishes the abrasive's upper speed limit and must be considered when selecting a die grinder and mounting accessory. The 1-1/2" length provides additional abrasive contact along extended angled features compared with shorter tapered rolls, provided sufficient working clearance is available. Suitable workpiece materials include ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel. The 38318 is supplied in a box of 100 for recurring deburring and metal surface preparation.
Type: Tapered Cartridge Roll | Part Number: 38318 | Abrasive Material: Premium Aluminum Oxide | Base Diameter: 1/2" | Length: 1-1/2" | Arbor: 1/8" | Grit: 50 | Max RPM: 26,000 | Recommended Mandrel: 95104 | Quantity: 100 per Box | Material Application: Ferrous Metals, Non-Ferrous Metals, Stainless Steel, High-Tensile Steel
Features:
- Premium aluminum oxide grain supports deburring, flash removal, and abrasive surface preparation on ferrous and non-ferrous metals.
- 50-grit abrasive provides coarse cutting action for removing pronounced machining marks and preparing rough surfaces for subsequent finishing.
- Full-taper configuration narrows toward the tip to improve access to angled recesses, internal corners, and contoured metal features.
- 1/2" base diameter offers a useful abrasive contact area near the wider end of the roll while allowing more focused sanding toward the tip.
- 1-1/2" abrasive length provides additional working contact along elongated internal fillets and recessed contours.
- Multi-layer, self-dressing construction exposes sharp, new cutting abrasive as successive layers wear away.
- 1/8" arbor configuration corresponds to manufacturer-referenced cartridge roll mandrel 95104 for properly matched mounting.
- Quick removal and installation facilitate abrasive replacement, while boxes of 100 support regular inventory replenishment.
Applications:
- Machining and CNC operations - Removing pronounced burrs and rough cutter marks from angled openings, recessed contours, and internal fillets.
- Tool and die manufacturing - Performing initial sanding inside accessible tooling cavities, tapered features, and corners requiring a narrowing abrasive profile.
- Metal fabrication - Cleaning up localized flash and uneven edges around contoured metal openings before finer surface blending.
- Stainless steel and alloy steel processing - Carrying out coarse deburring and preliminary surface preparation on recessed stainless steel and high-tensile steel components.
- Industrial equipment maintenance - Preparing accessible internal corners, recessed fittings, and irregular metal repair areas for subsequent finishing.
FAQs:
- Q: What makes United Abrasives 38318 different from 38319?
A: Both tapered cartridge rolls have a 1/2" base diameter, 1-1/2" length, 1/8" arbor opening, and 26,000 RPM maximum operating speed. The 38318 uses coarser 50-grit abrasive for greater material removal, while the 38319 uses 60 grit for a somewhat finer sanding pattern. - Q: When should I choose a 50-grit tapered cartridge roll?
A: Choose 50 grit when pronounced burrs, flash, or rough machining marks need to be reduced before finer sanding. It is better suited to initial material removal than producing a smooth final finish. - Q: How does a tapered cartridge roll compare with a straight cartridge roll?
A: A tapered cartridge roll narrows toward its tip, helping operators reach angled corners and irregular contours. A straight roll maintains a cylindrical working profile and may provide more consistent abrasive contact along parallel side walls and uniform grooves. - Q: Can United Abrasives 38318 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 abrasives dedicated to stainless steel when preventing cross-contamination from prior carbon steel work is important. - Q: Which mandrel is recommended for SKU 38318?
A: The United Abrasives 2025-2026 catalog identifies mandrel part number 95104 for this 1/8" arbor, 1-1/2" long tapered cartridge roll. Confirm secure mounting, mandrel engagement, tool shank compatibility, and operating speed before use. - Q: What is the maximum operating speed and packaging quantity?
A: United Abrasives 38318 has a maximum operating speed of 26,000 RPM and is sold in a box of 100 tapered cartridge rolls. Mounting accessories and their inclusion should be confirmed separately.
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.)
- 1-1/2
- Arbor Hole (in.)
- 1/8
- Grit
- 50
- RPM
- 26000
- Mandrel Part
- 95104
- Box of
- 100
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