Permaswage® Deburring Stems: Complete Part Number Guide for Aerospace Tube Preparation
Proper tube preparation is critical to every successful Permaswage® installation. Before a fitting can be swaged onto tubing, the tube end must be cut square, cleaned, and deburred to eliminate sharp edges and metal chips that can damage fittings and seals.
Permaswage® deburring stems are specialized tube preparation tools designed to remove internal burrs from tubing after cutting. These tools are included in many Permaswage® tool kits and are an essential component of the installation process.
What Is a Permaswage® Deburring Stem?
A deburring stem assembly is a removable cutter attachment used with a Permaswage® deburring tool handle.
The stem is inserted into the tube after cutting and rotated to remove burrs from the inside diameter of the tube. Proper deburring helps prevent damage to fitting seals, prevents scratches inside fittings, removes loose metal particles, improves fitting insertion, and helps ensure proper swage quality.
How the Permaswage® Deburring Tool Works
The Permaswage® deburring system consists of a deburring tool handle, replaceable stem assembly, internal cutter, expanding rubber plug, and plunger release mechanism.
- Select the correct stem assembly for the tube size.
- Install the stem into the deburring handle.
- Lubricate the rubber expansion plug.
- Insert the tool into the tube.
- Rotate the knurled handle clockwise.
- Remove internal burrs from the tube end.
- Inspect the tube end before swaging.
- Clean and store the stem assembly after use.
Permaswage® Deburring Tool and Stem Assembly Part Numbers
| Tube Size | Tube Dash Size | Deburring Tool | Stem Assembly | NSN |
|---|---|---|---|---|
| 3/16" | -03 | D9851-14 | D9851-13-03 | 5110-00-163-5980 |
| 1/4" | -04 | D9851-14 | D9851-13-04 | 5110-00-005-5650 |
| 5/16" | -05 | D9851-14 | D9851-13-05 | 5110-00-006-0491 |
| 3/8" | -06 | D9851-14 | D9851-13-06 | 5110-00-133-1477 |
| 1/2" | -08 | D9850-14 | D9850-13-08 | 5110-00-003-0535 |
| 5/8" | -10 | D9850-14 | D9850-13-10 | 5110-00-003-0536 |
| 3/4" | -12 | D9850-14 | D9850-13-12 | 5110-00-003-0537 |
| 1" | -16 | D9849-15 | D9849-13-16 | 5110-00-784-7946 |
| 1-1/4" | -20 | D9849-15 | D9849-13-20 | 5110-00-784-7947 |
| 1-1/2" | -24 | D9849-15 | D9849-13-24 | 5110-00-784-7950 |
Skydrol-Compatible Permaswage® Deburring Stem Assemblies
| Tube Size | Tube Dash Size | Skydrol-Compatible Stem Assembly |
|---|---|---|
| 3/16" | -03 | D9759-13-03 |
| 1/4" | -04 | D9759-13-04 |
| 5/16" | -05 | D9759-13-05 |
| 3/8" | -06 | D9759-13-06 |
| 1/2" | -08 | D9758-13-08 |
| 5/8" | -10 | D9758-13-10 |
| 3/4" | -12 | D9758-13-12 |
| 1" | -16 | D9757-13-16 |
| 1-1/4" | -20 | D9757-13-20 |
| 1-1/2" | -24 | D9757-13-24 |
Why Deburring Is Critical Before Using Permaswage® Fittings
Many installation problems originate from poor tube preparation rather than the swaging operation itself. If burrs remain inside the tubing, fittings may not seat correctly, internal seals may be damaged, contamination may enter the system, and hydraulic or pneumatic leaks can occur.
Proper deburring helps ensure that the tube end is smooth, clean, and ready for fitting installation before the swage process begins.
Industries That Use Permaswage® Deburring Tools
Permaswage® deburring stems are commonly used in commercial aviation, military aircraft maintenance, aerospace manufacturing, helicopter maintenance, defense systems, hydraulic tube assembly operations, and MRO facilities.
Replacing Lost or Damaged Permaswage® Deburring Stems
Deburring stems are frequently lost, worn, or separated from complete Permaswage® tool kits. Purchasing individual replacement stem assemblies allows technicians to restore existing kits without purchasing a complete replacement set.
When ordering a replacement stem, verify the tube size, confirm whether a standard or Skydrol-compatible version is required, and match the stem assembly to the correct deburring tool handle.
Commonly Requested Permaswage® Deburring Stem Part Numbers
- D9851-13-03
- D9851-13-04
- D9851-13-05
- D9851-13-06
- D9850-13-08
- D9850-13-10
- D9850-13-12
- D9849-13-16
- D9849-13-20
- D9849-13-24
Conclusion
Permaswage® deburring stems are a small but critical component of the tube preparation process. Proper deburring helps protect seals, prevent contamination, improve fitting installation, and contribute to reliable long-term system performance.
Whether you are maintaining commercial aircraft, supporting military operations, or manufacturing aerospace components, using the correct Permaswage® deburring stem assembly is an essential step toward achieving a quality swaged connection.
Disclaimer
⚠️ ⚠️Top Flight Tools (TFT) is an independent reseller and is not affiliated with, sponsored by, or endorsed by Permaswage® or Precision Castparts Corp. (PCC). All product names, trademarks, and registered trademarks are the property of their respective owners. Any reference to Permaswage® products, specifications, or part numbers is provided for informational purposes only. All Permaswage® trademarks and part numbers remain the property of their respective companies.
While every effort is made to ensure the accuracy of the information provided, it is the customer’s responsibility to verify all specifications, compatibility, and suitability of products for their intended application prior to use. TFT assumes no liability for errors, omissions, or the misuse or misapplication of this information, and disclaims any responsibility for damages resulting from reliance on it.