For finishing angled metal recesses, smoothing residual machining marks, and refining internal contours after initial deburring, the United Abrasives 38340 Tapered Cartridge Roll provides fine abrasive cutting action with a wider base and a narrowing working profile. Featuring a 3/4" base diameter, 1-1/2" length, and 120-grit premium aluminum oxide abrasive, this cartridge roll is suited to light deburring, scratch refinement, and localized surface blending. Its full-taper design gradually narrows toward the tip, helping operators reach recessed corners, internal fillets, angled openings, and contoured surfaces where a straight cylindrical cartridge roll may be difficult to position. The 120-grit abrasive produces a finer sanding pattern than the 60- and 80-grit alternatives, making it particularly useful during later stages of metal finishing.
The United Abrasives 38340 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 95104 cartridge roll mandrel for appropriately matched mounting on compatible rotary tools. The 18,000 RPM maximum operating speed establishes the abrasive's upper speed limit and is important when selecting equipment capable of operating at higher speeds. The 3/4" base provides useful contact on accessible recessed surfaces, while the tapered tip allows more focused sanding around angled features. Suitable workpiece materials include ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel. The 38340 is supplied in a box of 100 for recurring machining, fabrication, and metal finishing applications.
Type: Tapered Cartridge Roll | Part Number: 38340 | Abrasive Material: Premium Aluminum Oxide | Base Diameter: 3/4" | Length: 1-1/2" | Arbor: 1/8" | Grit: 120 | 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 fine sanding, light deburring, and surface blending on ferrous and non-ferrous metal components.
- 120-grit abrasive helps reduce residual machining marks and scratches left by earlier coarse or intermediate sanding operations.
- Full-taper profile narrows toward the tip to provide access to angled recesses, internal corners, fillets, and irregular metal contours.
- 3/4" base diameter offers a wider abrasive contact area near the base for accessible recessed surfaces while supporting focused work toward the tapered tip.
- 1-1/2" abrasive length provides useful contact along angled channels and internal contours where sufficient 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 properly matched mounting.
- Quick removal and installation facilitate abrasive changes, while the box quantity of 100 supports regular inventory replenishment.
Applications:
- Precision machining and CNC finishing Refining light machining marks around angled openings, recessed pockets, and contoured internal surfaces.
- Tool and die manufacturing Finishing accessible tooling cavities, tapered surfaces, and internal fillets that benefit from a narrowing abrasive profile.
- Metal fabrication Reducing residual sanding scratches and blending localized surface imperfections after initial deburring.
- Stainless steel and alloy steel finishing Performing fine abrasive sanding on recessed stainless steel and high-tensile steel components.
- Industrial equipment maintenance Smoothing minor imperfections on accessible recessed fittings, angled corners, and contoured metal repair areas.
FAQs:
- Q: What is the difference between United Abrasives 38340 and 38339 Tapered Cartridge Rolls? A: Both models feature a 3/4" base diameter, 1-1/2" length, 1/8" arbor opening, and 18,000 RPM maximum operating speed. The 38340 uses finer 120-grit abrasive for surface refinement, while the 38339 uses 80-grit abrasive for intermediate sanding and greater material removal.
- Q: When should I choose 120 grit instead of 60 grit? A: Choose 120 grit when the goal is smoothing residual marks and refining previously prepared surfaces. The coarser 60-grit United Abrasives 38338 is better suited to removing noticeable burrs, flash, and rough machining marks during initial surface preparation.
- Q: Is the United Abrasives 38340 suitable for final polishing? A: The 120-grit abrasive is intended for fine sanding and surface refinement rather than producing a polished or mirror finish. Additional finishing steps may be required depending on the specified surface finish.
- Q: Why choose a tapered cartridge roll instead of a straight cartridge roll? A: A tapered cartridge roll narrows toward its tip, helping operators reach angled recesses, internal corners, and irregular contours. A straight cartridge roll maintains a uniform cylindrical profile and may be preferable for sanding parallel side walls or straight grooves.
- Q: Can the United Abrasives 38340 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 avoiding cross-contamination from previous carbon steel work is important.
- Q: Which mandrel is recommended for SKU 38340? A: The United Abrasives 20252026 catalog identifies mandrel part number 95104 for this 1/8" arbor, 1-1/2" long tapered cartridge roll. Verify secure mounting engagement, tool shank compatibility, and applicable speed limits before use.
- Q: What are the maximum operating speed and box quantity? A: The United Abrasives 38340 has a maximum operating speed of 18,000 RPM and is sold in a box of 100 tapered cartridge rolls. Confirm the required mounting accessories and package contents 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.)
- 3/4
- Length (in.)
- 1-1/2
- Arbor Hole (in.)
- 1/8
- Grit
- 120
- RPM
- 18000
- Mandrel Part
- 95104
- Box of
- 100
This product hasn't received any reviews yet. Be the first to review this product!