For fine sanding along recessed metal surfaces, elongated grooves, and internal contours, the United Abrasives 38051 Straight Cartridge Roll provides precise abrasive contact where larger sanding accessories have limited access. Featuring a 3/8" diameter, 1-1/2" length, and 120-grit premium aluminum oxide abrasive, this cartridge roll is suited to light deburring, smoothing machining marks, and refining surfaces previously prepared with coarser abrasives. Its straight cylindrical configuration allows operators to finish channels, fillets, recesses, side walls, and the bottoms of dead-end holes. The finer 120-grit abrasive produces a more refined sanding pattern than 50-, 60-, or 80-grit alternatives, making it particularly useful when controlled surface finishing takes priority over aggressive material removal.
The United Abrasives 38051 incorporates a multi-layer, self-dressing construction, which exposes fresh cutting abrasive as successive layers wear away, helping maintain effective sanding action throughout use. Its 1/8" arbor opening corresponds to the manufacturer-specified 95104 cartridge roll mandrel for installation on compatible rotary tools. The 26,000 maximum RPM rating establishes the abrasive's operating speed limit for proper tool selection. Compared with the shorter United Abrasives 38043, the 38051 offers an additional 1/2" of abrasive length for finishing extended grooves and internal walls while maintaining the same diameter and grit. Suitable for ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel, this cartridge roll is supplied in a box of 100 for recurring metal finishing requirements.
Type: Straight Cartridge Roll | Part Number: 38051 | Abrasive Material: Premium Aluminum Oxide | Diameter: 3/8" | Length: 1-1/2" | Arbor: 1/8" | Grit: 120 | Max RPM: 26,000 | Mandrel Part Number: 95104 | Quantity: 100 per Box | Material Application: Ferrous Metals, Non-Ferrous Metals, Stainless Steel, High-Tensile Steel
Features:
- Premium aluminum oxide abrasive grain supports sanding, surface blending, and finishing on ferrous and non-ferrous metals.
- 120-grit abrasive helps reduce machining marks, smooth minor surface imperfections, and refine scratches remaining after coarser sanding operations.
- 3/8" diameter provides localized abrasive contact inside recessed openings, narrow channels, and internal metal features with sufficient clearance.
- 1-1/2" straight cylindrical construction offers additional sanding length for elongated grooves, internal side walls, fillets, and recessed contours.
- Multi-layer, self-dressing construction exposes sharp, new cutting abrasive as successive layers wear away, helping sustain effective sanding performance.
- Suitable for high-speed deburring and flash removal where light material removal and finer surface refinement are required.
- Quick removal and installation simplify abrasive replacement during multi-stage machining and finishing operations.
- Supplied in boxes of 100 to support routine abrasive replenishment and repeated metalworking applications.
Applications:
- Precision machining and CNC finishing - Smoothing light tool marks, removing residual burrs, and refining elongated grooves or recessed surfaces on machined components.
- Tool and die manufacturing - Finishing internal fillets, recessed contours, and detailed tooling features where extended abrasive contact is beneficial.
- Stainless steel fabrication - Performing fine sanding and surface blending on stainless steel and high-tensile steel components following initial surface preparation.
- Metal component manufacturing - Refining localized surface textures and reducing sanding scratches left by coarser abrasive operations.
- Industrial maintenance and repair - Smoothing minor surface imperfections and cleaning recessed areas on metal fittings, machinery components, and repair parts.
FAQs:
- Q: What is the difference between United Abrasives 38051 and 38049 Straight Cartridge Rolls?
A: Both cartridge rolls feature a 3/8" diameter, 1-1/2" length, 1/8" arbor opening, and 26,000 RPM maximum operating speed. The 38051 uses finer 120-grit aluminum oxide abrasive for surface refinement and light deburring, while the 38049 uses 80-grit abrasive for intermediate sanding and greater material removal. - Q: How does the United Abrasives 38051 compare with the 38043 cartridge roll?
A: Both models have a 3/8" diameter and 120-grit abrasive. The 38051 measures 1-1/2" long, while the 38043 measures 1" long. The longer 38051 provides additional abrasive contact length for extended grooves and internal side walls, provided adequate working clearance is available. - Q: Is the United Abrasives 38051 suitable for removing heavy burrs?
A: The 120-grit configuration is better suited to light burr removal, fine sanding, and surface blending than aggressive stock removal. For larger burrs or deeper machining marks, a coarser cartridge roll may be more efficient before progressing to the 38051 for surface refinement. - Q: Can the United Abrasives 38051 be used on stainless steel?
A: Yes. United Abrasives identifies stainless steel and high-tensile steel among the suitable workpiece materials, along with ferrous and non-ferrous metals. When preventing cross-contamination is important, use cartridge rolls dedicated to stainless steel rather than abrasives previously used on carbon steel. - Q: Which mandrel is recommended for United Abrasives part number 38051?
A: The United Abrasives 2025-2026 catalog specifies mandrel part number 95104 for this cartridge roll. The roll has a 1/8" arbor opening. Verify proper mandrel fit, secure mounting, and compatibility with the selected rotary tool before operation. - Q: How many cartridge rolls are supplied, and what is their maximum operating speed?
A: United Abrasives part number 38051 is sold in a box of 100 cartridge rolls, each rated for a maximum operating speed of 26,000 RPM. The tool's maximum speed must not exceed the abrasive's rated operating speed, and the mandrel must also be suitable for the intended operating conditions.
| SKU (Qty 100) |
Base Dia | Length | Arbor | Grit | Max RPM | Mandrel Part # |
|---|---|---|---|---|---|---|
| 38001 | 3/16" | 1" | 3/32" | 80 | 26,000 | 95108 |
| 38003 | 3/16" | 1" | 3/32" | 120 | 26,000 | 95108 |
| 38007 | 1/4" | 1" | 1/8" | 60 | 26,000 | 95105 |
| 38008 | 1/4" | 1" | 1/8" | 80 | 26,000 | 95105 |
| 38010 | 1/4" | 1" | 1/8" | 120 | 26,000 | 95105 |
| 38013 | 1/4" | 1" | 1/8" | 320 | 26,000 | 95105 |
| 38014 | 1/4" | 1-1/2" | 1/8" | 60 | 26,000 | 95104 |
| 38015 | 1/4" | 1-1/2" | 1/8" | 80 | 26,000 | 95104 |
| 38017 | 1/4" | 1-1/2" | 1/8" | 120 | 26,000 | 95104 |
| 38019 | 1/4" | 1-1/2" | 1/8" | 240 | 26,000 | 95104 |
| 38040 | 3/8" | 1" | 1/8" | 60 | 26,000 | 95105 |
| 38041 | 3/8" | 1" | 1/8" | 80 | 26,000 | 95105 |
| 38043 | 3/8" | 1" | 1/8" | 120 | 26,000 | 95105 |
| 38047 | 3/8" | 1-1/2" | 1/8" | 50 | 26,000 | 95104 |
| 38048 | 3/8" | 1-1/2" | 1/8" | 60 | 26,000 | 95104 |
| 38049 | 3/8" | 1-1/2" | 1/8" | 80 | 26,000 | 95104 |
| 38051 | 3/8" | 1-1/2" | 1/8" | 120 | 26,000 | 95104 |
| 38055 | 3/8" | 2" | 1/8" | 60 | 26,000 | 95103 |
| 38056 | 3/8" | 2" | 1/8" | 80 | 26,000 | 95103 |
| 38062 | 1/2" | 1" | 1/8" | 50 | 26,000 | 95105 |
| 38063 | 1/2" | 1" | 1/8" | 60 | 26,000 | 95105 |
| 38064 | 1/2" | 1" | 1/8" | 80 | 26,000 | 95105 |
| 38066 | 1/2" | 1" | 1/8" | 120 | 26,000 | 95105 |
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.)
- 3/8
- Length (in.)
- 1-1/2
- Arbor Hole (in.)
- 1/8
- Grit
- 120
- RPM
- 26000
- Mandrel Part
- 95104
- Box of
- 100
This product hasn't received any reviews yet. Be the first to review this product!