For blending machining marks, removing minor burrs, and smoothing elongated recesses in metal components, the United Abrasives 38049 Straight Cartridge Roll provides a practical abrasive solution for intermediate sanding and surface preparation. Featuring a 3/8" diameter, 1-1/2" length, and 80-grit premium aluminum oxide abrasive, this cartridge roll balances material removal with a more refined sanding pattern than coarser 50- or 60-grit alternatives. Its straight cylindrical shape allows abrasive contact along channels, fillets, side walls, recessed contours, and the bottoms of dead-end holes where conventional grinding accessories may be difficult to position. The extended abrasive length helps operators work along internal surfaces and grooves while maintaining a relatively narrow working diameter. United Abrasives specifies this product family for ferrous metals, non-ferrous metals, stainless steel, and high-tensile steel.
The United Abrasives 38049 incorporates a multi-layer, self-dressing construction, meaning fresh cutting abrasive becomes exposed as successive layers wear away, helping maintain effective sanding action during 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 upper operating speed limit and must be considered when selecting the appropriate tool and mandrel. Compared with the shorter United Abrasives 38041, this model provides an additional 1/2" of abrasive length while retaining the same diameter and grit. Supplied in a box of 100, the 38049 supports recurring sanding and finishing requirements in machining facilities, fabrication shops, toolrooms, and industrial maintenance departments.
Type: Straight Cartridge Roll | Part Number: 38049 | Abrasive Material: Premium Aluminum Oxide | Diameter: 3/8" | Length: 1-1/2" | Arbor: 1/8" | Grit: 80 | 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 provides effective cutting action for sanding, deburring, and surface blending on ferrous and non-ferrous metals.
- 80-grit abrasive supports intermediate material removal and refinement of machining marks without the coarser scratch pattern associated with lower grits.
- 3/8" diameter allows localized abrasive contact inside channels, recessed openings, and internal metal features with sufficient working clearance.
- 1-1/2" straight cylindrical construction provides 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 sanding effectiveness.
- Suitable for high-speed deburring and flash removal when operated within the manufacturer's specified maximum speed rating.
- Quick removal and installation help reduce interruptions when replacing cartridge rolls during repeated finishing operations.
- Supplied in boxes of 100 for convenient abrasive inventory management and replenishment in metalworking environments.
Applications:
- Precision machining and CNC workshops - Blending tool marks, removing residual burrs, and smoothing elongated grooves and recessed surfaces on machined metal components.
- Metal fabrication and finishing - Refining rough edges, blending minor surface imperfections, and preparing narrow metal features for subsequent finishing operations.
- Tool and die manufacturing - Sanding recessed contours, internal fillets, and extended tooling features requiring controlled abrasive contact.
- Stainless steel and alloy steel processing - Performing intermediate sanding and surface blending on stainless steel and high-tensile steel workpieces.
- Industrial maintenance and equipment repair - Cleaning up localized surface irregularities and refinishing accessible internal metal surfaces on machinery components and fittings.
FAQs:
- Q: What is the difference between United Abrasives 38049 and 38048 Straight Cartridge Rolls?
A: Both cartridge rolls have a 3/8" diameter, 1-1/2" length, 1/8" arbor opening, and maximum operating speed of 26,000 RPM. The 38049 uses 80-grit aluminum oxide abrasive for intermediate sanding and surface refinement, while the 38048 uses coarser 60-grit abrasive for more aggressive material removal. - Q: How does the United Abrasives 38049 compare with the 38041?
A: Both models feature a 3/8" diameter and 80-grit abrasive. The 38049 measures 1-1/2" long, compared with the 1" length of the 38041. The longer configuration provides additional abrasive contact length for sanding extended grooves and internal side walls where adequate clearance is available. - Q: Is the 38049 suitable for removing heavy machining burrs?
A: The 80-grit configuration is useful for minor burr removal, intermediate sanding, and surface blending. For larger burrs or substantial stock removal, a coarser 50- or 60-grit cartridge roll may be more efficient before progressing to the 38049 for refinement. - Q: Can the United Abrasives 38049 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 38049?
A: The United Abrasives 2025-2026 catalog specifies mandrel part number 95104 for this cartridge roll. The roll features a 1/8" arbor opening. Verify proper mounting engagement, secure installation, 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 38049 is sold in a box of 100 cartridge rolls, each rated for a maximum operating speed of 26,000 RPM. The power tool must not exceed the abrasive's rated 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
- 80
- RPM
- 26000
- Mandrel Part
- 95104
- Box of
- 100
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