Rear Outlet for Sovol / Comgrow SH02 Dryer

Overview

The Sovol / Comgrow SH02 filament dryer comes with only two PTFE exits located on the top cover.
For setups where rear PTFE outlets are required—such as Snapmaker U1 dual-side spool feeding—this printable adapter provides the ideal solution.

This design adds two rear PTFE ports, allowing clean and low-friction filament routing behind the dryer.

What’s Included

This model set contains:

• Rear PTFE Outlet Adapter (outer side)
  Designed to fit the curved back panel of the SH02.
• Internal Backing Plate (inner side)
  Locks the adapter in place from the inside.
• M10 Lock Nut (printed)
  Used to secure the assembly.
• Drilling Template
  Ensures perfectly placed mounting holes on the SH02 housing.

Compatible PTFE Fittings

The design uses standard PC4-M10 pneumatic PTFE fittings:

• Thread: M10 × 1.0
• Type: PC4-M10 push-fit connector
• Tube size: 4 mm outer diameter PTFE tube

(These connectors are typically labeled “PC4-M10” in 3D-printing shops.)

Function

The adapter allows you to insert a 4 mm OD PTFE tube directly into the drying chamber.
This creates a controlled filament path that guides the filament upward and out the back, ideal for printers such as the Snapmaker U1 that feed filament from behind the machine.

Drilling Template Instructions

The included drilling jig helps you create the two necessary holes.

Steps:

1. Align the template on the SH02 rear housing.
   • The distance from the top edge of the dryer to the centerline of the holes should be approx. 4.5 cm.
2. Pre-drill both holes with a 4 mm drill bit.
3. Enlarge each hole to 10 mm to fit the M10 thread sockets.

Installation Instructions

1. Screw a PC4-M10 pneumatic fitting into the printed outer adapter.
2. Insert the adapter from the outside through the newly drilled 10 mm holes.
3. Place the inner backing plate onto the inside of the dryer case.
4. Secure everything using the printed M10 lock nut.
5. Insert a 4 mm PTFE tube through the fitting and push it all the way into the dryer interior.

The filament path is now fully guided through the PTFE tube.

Using the Dryer With the New Rear Outlets

Because the filament is fed from below:

1. Pull off a small length of filament from the spool.
2. Feed the filament from underneath into the PTFE tube.
3. Then insert the spool into the holder.
4. Make sure the spool unwinds forward when the printer pulls filament.

This ensures smooth feeding without tangles.

Recommended Print Settings

• Material: PETG, ASA or ABS (recommended for heat resistance)
• Layer height: 0.2 mm
• Infill: 15 %
• Supports: Only for drilling template required (all other parts are designed support-free)

Notes

• Designed specifically for Sovol / Comgrow SH02.
• Fully compatible with Snapmaker U1 or any rear-feed printer setup.
• No modifications to the dryer internals are required.