When coarse sanding and burr removal are needed inside wider grooves, cavities, and recessed metal components, the United Abrasives 38112 Straight Cartridge Roll delivers concentrated abrasive cutting action with a practical cylindrical working surface. Featuring a 3/4" diameter, 1-1/2" length, and 40-grit premium aluminum oxide abrasive, this cartridge roll supports aggressive material removal, flash cleanup, and initial surface preparation. Its straight profile helps operators reach internal fillets, channels, side walls, and the bottoms of dead-end holes where larger abrasive discs may be difficult to position. The coarse 40-grit grain is particularly useful for removing pronounced machining marks and surface irregularities before progressing to finer abrasive grades. Suitable workpiece materials include ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel.
The United Abrasives 38112 incorporates a multi-layer, self-dressing construction that exposes fresh, sharp abrasive grain as successive layers wear away, helping maintain cutting effectiveness during use. Its 3/16" arbor opening corresponds to the manufacturer-specified 95107 cartridge roll mandrel for use with compatible rotary tools. The 18,000 maximum RPM rating establishes the abrasive's upper operating speed limit, making speed compatibility an important consideration when selecting a die grinder and mounting accessory. Its 3/4" diameter provides a broader abrasive contact area than smaller cartridge rolls when sufficient clearance is available, while the 1-1/2" length accommodates sanding along extended internal surfaces. Supplied in a box of 100, this configuration supports recurring deburring and surface preparation requirements in metal fabrication shops, machining facilities, and maintenance departments.
Type: Straight Cartridge Roll | Part Number: 38112 | Abrasive Material: Premium Aluminum Oxide | Diameter: 3/4" | Length: 1-1/2" | Arbor: 3/16" | Grit: 40 | Max RPM: 18,000 | Mandrel Part Number: 95107 | Quantity: 100 per Box | Material Application: Ferrous Metals, Non-Ferrous Metals, Stainless Steel, High-Tensile Steel
Features:
- Premium aluminum oxide grain supports coarse sanding, deburring, and removal of unwanted surface material from ferrous and non-ferrous metals.
- 40-grit abrasive provides aggressive cutting action for removing pronounced burrs, flash, and machining marks before finer finishing.
- 3/4" diameter offers increased abrasive contact area for wider channels, accessible cavities, and recessed metal surfaces.
- 1-1/2" straight cylindrical configuration allows abrasive contact along internal side walls, fillets, elongated grooves, and the bottoms of dead-end holes.
- Multi-layer, self-dressing construction exposes sharp, new cutting abrasive as each layer wears away, helping sustain material removal performance.
- 3/16" arbor configuration corresponds to the manufacturer-listed 95107 cartridge roll mandrel for properly matched mounting.
- Quick removal and installation help reduce interruptions during abrasive replacement in repetitive sanding operations.
- Supplied in boxes of 100 for planned abrasive replenishment and recurring metalworking applications.
Applications:
- Machining and CNC workshops - Removing machining burrs, rough tool marks, and excess material from accessible internal grooves and recessed metal features.
- Metal fabrication and welding - Cleaning up flash, blending rough edges, and preparing recessed metal surfaces for subsequent finishing operations.
- Tool and die manufacturing - Coarse sanding of tooling cavities, internal fillets, and contours where localized abrasive contact is required.
- Stainless steel and alloy steel processing - Performing initial surface preparation and deburring on stainless steel and high-tensile steel components.
- Industrial maintenance and repair - Removing localized surface irregularities and preparing accessible metal fittings and machinery components for refurbishment.
FAQs:
- Q: What is the United Abrasives 38112 Straight Cartridge Roll used for?
A: The 38112 is used for coarse sanding, deburring, flash removal, and initial surface preparation. Its 40-grit abrasive is particularly useful when substantial material removal is needed before switching to finer finishing grits. - Q: How does the United Abrasives 38112 differ from the 38113?
A: Both models have a 3/4" diameter, 1-1/2" length, 3/16" arbor opening, and 18,000 RPM maximum operating speed. The 38112 uses coarser 40-grit abrasive for more aggressive cutting, while the 38113 features 60-grit abrasive for a somewhat finer sanding pattern. - Q: Why choose a 3/4" diameter cartridge roll instead of a smaller size?
A: The larger diameter provides broader abrasive contact on accessible internal surfaces and wider grooves. Smaller cartridge rolls may be preferable when working in tighter openings where a 3/4" abrasive cannot fit. - Q: Which mandrel is recommended for United Abrasives part number 38112?
A: The United Abrasives 2025-2026 catalog identifies mandrel part number 95107. The cartridge roll has a 3/16" arbor opening, so verify correct mandrel engagement, rotary tool compatibility, and operating speed before use. - Q: Can the United Abrasives 38112 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 dedicated abrasives when avoiding contamination from previous carbon steel work is important. - Q: How many cartridge rolls are supplied, and what is their maximum operating speed?
A: The 38112 is sold in a box of 100 cartridge rolls, each rated for a maximum operating speed of 18,000 RPM. The selected power tool must not exceed this rating, and the mandrel must also be suitable for the intended operating conditions.
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.)
- 1-1/2
- Arbor Hole (in.)
- 3/16
- Grit
- 40
- RPM
- 18000
- Mandrel Part
- 95107
- Box of
- 100
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