15° PVC-U Pipe Chamfer Tool (110, 90, 75, 63 mm)

# 15° PVC-U Pipe Chamfer Tool (Multi-Diameter 110, 90, 75, 63 mm)

Use hot water to soften the plastic!

A compact, multi-diameter manual pipe beveling tool (chamfering "cup") specifically designed for preparing metric **PVC-U** pipes before solvent welding (glueing). 

To ensure a reliable leak-proof connection, standards like **ISO 1452** and **DVS 2204-1** strictly require a **15-degree chamfer** angle. This angle acts as a wedge, smoothly distributing the cement inside the fitting socket instead of scraping it off (which happens with a 45° or 90° cut).

Thanks to the stepped offset cone design, a single utility blade covers all 4 pipe sizes perfectly at the exact required 15° angle!

---

### 🔄 Update Log / Changelog

#### v1.2 — Reduced the amount of plastic required for printing

#### v1.1 — Fitment & Safety Update

* Fixed Pipe Fitment (Tolerances): Increased internal cylinder clearances for all diameters (110, 90, 75, 63 mm) to comply with ISO 1452-2 real-world pipe tolerances and compensate for 3D printer plastic shrinkage. Pipes now slide in smoothly without binding. (I hope)

* Added Blade Guard (Safety Feature)

* Optimized Transitions: Tweaked the internal lead-in chamfers for even easier pipe centering.

---

#### v1.0 — Initial Release

* First prototype design with a stepped offset cone and M3 heat-set inserts.

---

### 🛠 Bill of Materials (BOM)

To assemble this tool, you will need the following hardware:

* **Blade:** 1x Standard Trapezoid Utility Blade (Stanley type, 62mm x 19mm)

* **Screws:** 2x M3x6mm Button Head (or Cap Head) Hex Screws

* **Threaded Inserts:** 2x M3 Brass Heat-Set Inserts (Outer Diameter: 4.5mm, Length: 4.0mm)

### 📐 3D Design Technical Details

* **Insert Pockets:** The holes for the heat-set inserts are pre-sized at **4.1 mm** in diameter to ensure a perfect plastic flow and tight fit when melting them in. 

* **Ergonomics:** The outer shell features heavy gripping ribs for a comfortable manual twist. An integrated direction arrow shows the correct rotation path.

* **Blade Clamp:** Uses a simple 2-screw clamping plate that provides maximum rigidity to prevent blade flexing during tough cuts.

---

### 🖨 Recommended Print Settings

For maximum durability and structural integrity under twisting forces, please use the following slicing guidelines:

* **Material:** PETG, ASA, or ABS (PLA can be used for testing, but might be too brittle for heavy pipe friction)

* **Perimeters (Walls):** 4 or more (Crucial for strong blade mounts and heat-set inserts)

* **Top/Bottom Layers:** 5

* **Infill:** 30% - 40% (Gyroid or Grid for high torsional strength)

* **Supports:** No supports needed if oriented correctly (flat base down). 

---

### 💡 Assembly & Usage Tips

1. Melt the two M3 brass inserts into the housing using a soldering iron. Ensure they sit flush or slightly sub-flush.

2. Insert the Stanley blade, place the clamping plate over it, and secure it with the M3x6mm screws. *Do not overtighten to avoid stripping the plastic or crushing the insert.*

3. Push the pipe into the corresponding stepped section and rotate **clockwise** while applying gentle pressure.

Feel free to post your makes, post comments, and share your experience if you use it on real PVC pipes!