For removing machining burrs, blending rough edges, and preparing elongated recessed metal surfaces, the United Abrasives 38120 Straight Cartridge Roll delivers effective abrasive cutting action with a wider cylindrical working profile. Featuring a 3/4" diameter, 2" length, and 60-grit premium aluminum oxide abrasive, this cartridge roll is designed for coarse-to-intermediate sanding, flash removal, and localized surface preparation. Its straight configuration allows operators to work along internal channels, fillets, side walls, recesses, and the bottoms of accessible dead-end holes. The 60-grit abrasive provides useful material removal while leaving a finer sanding pattern than the coarser 40-grit version, making it suitable for deburring and blending before progressing to finer finishing grades.
The United Abrasives 38120 incorporates a multi-layer, self-dressing construction, meaning sharp, new abrasive grain is exposed as successive layers wear away to help maintain cutting action during use. Its 3/16" arbor opening corresponds to the manufacturer-listed 95106 cartridge roll mandrel for properly matched mounting. The 18,000 RPM maximum operating speed establishes the abrasive's upper speed limit, making rotary tool and mandrel compatibility essential. Compared with the shorter 38113 model, its 2" length offers additional abrasive contact along extended internal walls where working clearance permits. Suitable for ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel, the 38120 is supplied in a box of 100 for recurring metalworking applications.
Type: Straight Cartridge Roll | Part Number: 38120 | Abrasive Material: Premium Aluminum Oxide | Diameter: 3/4" | Length: 2" | Arbor: 3/16" | Grit: 60 | Max RPM: 18,000 | Recommended Mandrel: 95106 | Quantity: 100 per Box | Material Application: Ferrous Metals, Non-Ferrous Metals, Stainless Steel, High-Tensile Steel
Features:
- Premium aluminum oxide grain provides abrasive cutting action for deburring, sanding, and blending ferrous and non-ferrous metal surfaces.
- 60-grit abrasive supports removal of machining burrs, localized flash, and rough surface marks before subsequent finishing operations.
- 3/4" diameter offers a broad cylindrical contact surface for wider internal grooves, channels, and accessible recessed areas.
- Extended 2" abrasive length provides additional working contact along elongated side walls and internal surfaces compared with shorter cartridge rolls.
- Straight cylindrical configuration is suitable for sanding internal fillets, recesses, and the bottoms of accessible dead-end holes.
- Multi-layer, self-dressing construction exposes fresh cutting abrasive as the outer layers wear away, helping sustain sanding effectiveness.
- 3/16" arbor opening matches the manufacturer-listed 95106 cartridge roll mandrel for correctly sized mounting.
- Quick removal and installation help simplify abrasive replacement, while boxes of 100 support routine inventory replenishment.
Applications:
- Machining and CNC operations - Removing burrs and blending machining marks along wider, elongated internal grooves and recessed features.
- Metal fabrication - Cleaning up localized flash, smoothing rough edges, and preparing accessible metal channels for additional finishing.
- Tool and die manufacturing - Sanding internal fillets, elongated tooling cavities, and recessed contours where a larger cylindrical abrasive can fit.
- Stainless steel and alloy steel processing - Performing initial deburring and surface blending on stainless steel and high-tensile steel components.
- Industrial equipment maintenance - Smoothing localized imperfections on accessible machinery recesses, metal fittings, and repair surfaces.
FAQs:
- Q: What is the difference between United Abrasives 38120 and 38119?
A: Both models feature a 3/4" diameter, 2" length, 3/16" arbor opening, and 18,000 RPM maximum operating speed. The 38120 uses 60-grit abrasive for coarse-to-intermediate sanding, while the 38119 uses coarser 40-grit abrasive for more aggressive material removal. - Q: How does the 38120 compare with the shorter 38113 cartridge roll?
A: Both models have a 3/4" diameter, 60-grit abrasive, and 3/16" arbor opening. The 38120 is 2" long and uses the manufacturer-listed 95106 mandrel, while the 38113 is 1-1/2" long and lists mandrel 95107. The longer roll provides additional abrasive contact where adequate clearance is available. - Q: Should I choose 60 grit or 80 grit for surface blending?
A: The 60-grit 38120 is useful when machining burrs and rough surface marks still require material removal. The finer 80-grit 38121 is better suited to intermediate sanding and refining scratches left by coarser abrasive operations. - Q: Can the United Abrasives 38120 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 abrasives dedicated to stainless steel when avoiding cross-contamination from previous carbon steel work is important. - Q: Which mandrel is recommended for United Abrasives part number 38120?
A: The United Abrasives 20252026 catalog identifies mandrel part number 95106 for this 3/16" arbor, 2" long cartridge roll. Verify proper mounting engagement, secure installation, shank compatibility, and operating speed before use. - Q: What is the maximum operating speed, and how many rolls are supplied?
A: The 38120 has a maximum operating speed of 18,000 RPM and is sold in a box of 100 straight cartridge rolls. Select a power tool and mandrel that comply with the abrasive manufacturer's mounting and speed requirements.
Available Variations and Specifications
| SKU (Qty 100) |
Base Dia | Length | Arbor | Grit | Max RPM | Mandrel Part # |
|---|---|---|---|---|---|---|
| 38070 | 1/2" | 1-1/2" | 3/16" | 36 | 26,000 | 95107 |
| 38071 | 1/2" | 1-1/2" | 1/8" | 40 | 26,000 | 95104 |
| 38072 | 1/2" | 1-1/2" | 1/8" | 50 | 26,000 | 95104 |
| 38073 | 1/2" | 1-1/2" | 1/8" | 60 | 26,000 | 95104 |
| 38074 | 1/2" | 1-1/2" | 1/8" | 80 | 26,000 | 95104 |
| 38076 | 1/2" | 1-1/2" | 1/8" | 120 | 26,000 | 95104 |
| 38080 | 1/2" | 2" | 1/8" | 60 | 26,000 | 95103 |
| 38081 | 1/2" | 2" | 1/8" | 80 | 26,000 | 95103 |
| 38083 | 1/2" | 2" | 1/8" | 120 | 26,000 | 95103 |
| 38087 | 1/2" | 2" | 3/16" | 60 | 26,000 | 95106 |
| 38088 | 1/2" | 2" | 3/16" | 80 | 26,000 | 95106 |
| 38089 | 1/2" | 2" | 3/16" | 120 | 26,000 | 95106 |
| 38093 | 5/8" | 1-1/2" | 1/8" | 60 | 18,000 | 95104 |
| 38094 | 5/8" | 1-1/2" | 1/8" | 80 | 18,000 | 95104 |
| 38095 | 5/8" | 1-1/2" | 1/8" | 120 | 18,000 | 95104 |
| 38112 | 3/4" | 1-1/2" | 3/16" | 40 | 18,000 | 95107 |
| 38113 | 3/4" | 1-1/2" | 3/16" | 60 | 18,000 | 95107 |
| 38114 | 3/4" | 1-1/2" | 3/16" | 80 | 18,000 | 95107 |
| 38119 | 3/4" | 2" | 3/16" | 40 | 18,000 | 95106 |
| 38120 | 3/4" | 2" | 3/16" | 60 | 18,000 | 95106 |
| 38121 | 3/4" | 2" | 3/16" | 80 | 18,000 | 95106 |
| 38122 | 3/4" | 2" | 3/16" | 120 | 18,000 | 95106 |
| 38126 | 1" | 1-1/2" | 1/4" | 60 | 18,000 | 95102 |
| 38127 | 1" | 1-1/2" | 1/4" | 80 | 18,000 | 95102 |
| 38128 | 1" | 1-1/2" | 1/4" | 120 | 18,000 | 95102 |
| 38132 | 1" | 2" | 1/4" | 60 | 18,000 | 95101 |
| 38133 | 1" | 2" | 1/4" | 80 | 18,000 | 95101 |
| 38134 | 1" | 2" | 1/4" | 120 | 18,000 | 95101 |
Looking for more information about United Abrasives Straight Cartridge Roll? For help choosing the correct United Abrasives Straight Cartridge Rolls for your application, please call (800) 608-5210 or email info@intlairtool.com
- Type
- Straight Cartridge Roll
- Diameter (in.)
- 3/4
- Length (in.)
- 2
- Arbor Hole (in.)
- 3/16
- Grit
- 60
- RPM
- 18000
- Mandrel Part
- 95106
- Box of
- 100
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