For refining extended grooves, smoothing machining marks, and finishing recessed metal surfaces after initial deburring, the United Abrasives 38122 Straight Cartridge Roll provides fine abrasive cutting action with a broad cylindrical working surface. Featuring a 3/4" diameter, 2" length, and 120-grit premium aluminum oxide abrasive, this cartridge roll is designed for light deburring, scratch refinement, and localized surface blending. The straight profile allows operators to sand internal side walls, channels, fillets, recesses, and the bottoms of accessible dead-end holes. Its finer 120-grit abrasive produces a less aggressive scratch pattern than the 40-, 60-, and 80-grit alternatives, making it particularly useful during later stages of metal finishing.
The United Abrasives 38122 features a multi-layer, self-dressing construction that exposes fresh cutting abrasive as successive layers wear away, helping maintain effective sanding action. Its 3/16" arbor opening corresponds to the manufacturer-listed 95106 cartridge roll mandrel for appropriately matched mounting. The 18,000 RPM maximum operating speed establishes the abrasive's upper speed limit and must be considered when selecting a compatible rotary tool and mandrel. Compared with shorter 3/4" diameter cartridge rolls, the 2" abrasive length provides additional contact along elongated internal surfaces where working clearance permits. Suitable workpiece materials include ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel. The 38122 is supplied in a box of 100 for recurring machining, fabrication, and maintenance applications.
Type: Straight Cartridge Roll | Part Number: 38122 | Abrasive Material: Premium Aluminum Oxide | Diameter: 3/4" | Length: 2" | Arbor: 3/16" | Grit: 120 | 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 abrasive grain supports fine sanding, light deburring, and surface blending on metal components.
- 120-grit abrasive helps reduce residual machining marks and scratches left by coarser sanding operations.
- 3/4" diameter provides a wider cylindrical contact area for finishing accessible internal grooves and recessed metal surfaces.
- Extended 2" abrasive length offers additional working contact along elongated channels and side walls where sufficient clearance is available.
- Straight cylindrical design facilitates sanding of internal fillets, recesses, and the bottoms of accessible dead-end holes.
- Multi-layer, self-dressing construction exposes fresh cutting grain as successive abrasive layers wear away.
- 3/16" arbor opening corresponds to manufacturer-listed cartridge roll mandrel 95106 for compatible 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 minor tool marks and smoothing elongated internal grooves after initial deburring.
- Tool and die manufacturing - Finishing accessible tooling cavities, recessed contours, and internal fillets where a cylindrical abrasive provides useful contact.
- Metal fabrication - Reducing surface scratches and blending recessed metal areas following coarser sanding operations.
- Stainless steel and alloy steel finishing - Performing localized fine sanding on stainless steel and high-tensile steel components.
- Industrial equipment maintenance - Smoothing minor imperfections on accessible machinery recesses, metal fittings, and repair surfaces.
FAQs:
- Q: How does United Abrasives 38122 differ from 38121?
A: Both cartridge rolls have a 3/4" diameter, 2" length, 3/16" arbor opening, and 18,000 RPM maximum operating speed. The 38122 uses finer 120-grit abrasive for surface refinement, while the 38121 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 priority is reducing scratches and smoothing surfaces after initial deburring. A 60-grit roll, such as the United Abrasives 38120, is better suited to removing more noticeable burrs and rough machining marks. - Q: What advantage does the 2" length provide?
A: The extended abrasive length provides additional sanding contact along longer internal walls and grooves. A shorter cartridge roll may be easier to position in shallow recesses or areas with restricted working clearance. - Q: Can the United Abrasives 38122 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 dedicated abrasives for stainless steel when preventing contamination from previous carbon steel work is important. - Q: Which mandrel is recommended for SKU 38122?
A: The United Abrasives catalog identifies mandrel part number 95106 for this 3/16" arbor, 2" long cartridge roll. Confirm secure mounting, proper mandrel engagement, shank compatibility, and applicable speed limits before use. - Q: What are the maximum operating speed and packaging quantity?
A: The United Abrasives 38122 has a maximum operating speed of 18,000 RPM and is sold in a box of 100 straight cartridge rolls. Confirm mounting accessory requirements and package contents separately.
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
- 120
- RPM
- 18000
- Mandrel Part
- 95106
- Box of
- 100
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