What soldering iron do I need for model making?

A temperature-controlled iron with 15-40W is ideal. The Antex XS25 or Weller WE1010 are excellent choices. Avoid uncontrolled irons as they can overheat and damage small parts. A fine (1mm) tip is essential for most model work.

Should I use lead or lead-free solder?

Lead solder (60/40 tin-lead) is easier to work with and melts at a lower temperature. Lead-free solder is safer but needs higher temperatures and more skill. For model making, lead solder is generally preferred. Always wash hands after handling lead solder.

What is flux and why do I need it?

Flux cleans the metal surface and helps solder flow into the joint. Without flux, solder balls up and does not bond. Rosin flux (in cored solder) is adequate for copper wire. Liquid or acid flux is needed for brass and nickel silver. Always clean excess flux after soldering.

How do I solder without melting plastic?

Solder metal parts before attaching to the model. Use heat sinks (crocodile clips) to draw heat away from nearby plastic. Work quickly — touch-and-go technique. Let joints cool before handling. Pre-tin parts separately, then join with minimal heat.

ModelCalcs

Soldering Calculator — Temperature & Tip Selection

Choose the right soldering iron temperature and tip size for model work.

Task

Joint Size

Material

How We Calculate This

Recommends soldering temperature, tip size, solder type and flux based on your task, joint size and material.

Temperature Guide

Brass PE: 300-360°C depending on joint size
LED wiring: 280-350°C
Nickel silver: +20°C above brass temperatures
Copper: -20°C below brass temperatures

Frequently Asked Questions

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Last updated: February 2026

All calculations are estimates. Always verify quantities before purchasing materials.