Mineshima Kisage 25° Small TM-19: Perfect Gunpla Chisel

By GUNNZO | Published: 2026-10-29

Category: How-to Guides

Learn how to use the Mineshima Kisage 25° Small TM-19 for precise panel line engraving, deburring, and chamfering on Gunpla models.

Quick Answer

The Mineshima Kisage 25° Small TM-19 is a precise hobby chisel ideal for engraving panel lines, deburring plastic models, and chamfering edges on Gunpla. Its 25° blade angle gives you control for fine detail work.

Why the 25° Angle Matters

The 25° blade angle on the TM-19 is designed for controlled cutting in soft plastics like those used in Gunpla kits. It lets you make clean, shallow cuts without gouging the material, which is essential for panel line engraving and chamfering.

Compared to steeper angles, a 25° chisel requires less force and gives you better feedback, so you can feel the cut depth. This makes it a great choice for beginners and experienced builders alike.

When to Use the TM-19 vs. Other Tools

The TM-19 excels at fine detail work: scribing new panel lines, cleaning up parting lines, and chamfering edges before painting. It is not a heavy-duty tool for removing large nubs or cutting thick plastic—use a hobby knife or nippers for those jobs.

For panel line engraving, the chisel creates a V-shaped groove that holds panel liner or ink better than a scribing tool. It also leaves a cleaner edge than a knife, reducing the need for sanding.

How to Use the TM-19 for Gunpla Detail Work

Prepare the Work Area: Secure your Gunpla part with a hobby vise or clip so it doesn't move. Make sure you have good lighting and a comfortable grip on the chisel. Check that the blade is sharp and clean before starting.
Mark Your Cut Line: Use a pencil or a scribing template to mark the exact line you want to engrave. This helps you stay on track and avoid wandering cuts. Double-check the line placement before cutting—mistakes are hard to fix.
Make Light, Repeated Passes: Hold the chisel at a consistent angle (around 25°) and apply light pressure. Make several shallow passes instead of one deep cut to maintain control. Let the blade do the work; forcing it can cause slips or gouges.
Clean Up the Groove: After engraving, use a soft brush or compressed air to remove plastic dust. If needed, lightly sand the edges with fine-grit sandpaper to remove burrs. Inspect the line for evenness before moving to the next area.
Chamfering and Deburring: For chamfering, hold the chisel at a 45° angle to the edge and push gently along the length. For deburring, scrape the blade along the parting line with minimal pressure. Test on a scrap piece first to get the feel for the correct angle.
Maintain the Blade: After use, wipe the blade clean and store it in a safe place. Sharpen periodically with a fine whetstone to keep the edge precise. A dull chisel is more dangerous than a sharp one—keep it sharp.

Product Facts

Mineshima Kisage 25° Small TM-19: The Mineshima Kisage 25° Small TM-19 is designed for deburring plastic models, handling parting lines, chamfering, and line engraving. This makes it a versatile tool for Gunpla builders who need to clean up parts and add fine detail without switching tools.
Mineshima Kisage 25° Small TM-19