CurseForge · Minecraft mod
Smeltery IO
Tinkers Construct Smeltery Fuel and Casting Addon. By MCT.
Quick answer
Which Smeltery IO release should I use?
Smeltery IO MCT-SmelteryIO-1.12.2-1.3.72-release.jar targets 1.12.2 with Forge. The project page does not say whether this file belongs on the client, dedicated server, or both. All 2 required mods have matching files.
Where it goes
Is Smeltery IO required on the client, server, or both?
The project page does not say whether this file belongs on the client, dedicated server, or both.
The source does not explicitly classify this release as client-only or server-only.
What else does Smeltery IO MCT-SmelteryIO-1.12.2-1.3.72-release.jar need?
MCT-SmelteryIO-1.12.2-1.3.72-release.jar. Change the file and its required mods may change too.
Install Tinkers Construct, Mantle first. We found matching files for this game-version and loader setup. 22 come through another mod in the chain.
22 extra mods were pulled in by other dependencies. Indented rows show who needs each one. We only count dependency files that match this setup. A file for another loader does not fill the gap.
Before you install it
Add Smeltery IO without breaking your instance.
Built for Smeltery IO MCT-SmelteryIO-1.12.2-1.3.72-release.jar. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use MCT-SmelteryIO-1.12.2-1.3.72-release.jar. It targets 1.12.2 with Forge; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
Install Tinkers Construct, Mantle first. We found matching files for this game-version and loader setup. 22 come through another mod in the chain.
- 03
Put it on the correct side
The project page does not say whether this file belongs on the client, dedicated server, or both.
- 04
Pick the file you checked
Use the “Get this file” button beside MCT-SmelteryIO-1.12.2-1.3.72-release.jar. It opens that exact file at the source.
About this project
What does Smeltery IO add?
Official MCT Discord Server Here.
Assets are protected under the terms in the LICENSE_ASSETS
Smeltery IO
Tinkers Construct Smeltery Fuel and Casting Addon
* 1.3+ Has TE registration fixes, upgrading requires breaking/replacing SIO blocks *
This mod was inspired by Tinker I/O, and has some very similar functions. However, this mod requires fuel in the form of Snowballs to speed up your casting. Also the casting process can be completely automated by turning on the function to allow upgrades and casts to be inserted/extracted.
To make the mod easier to use, I suggest grabbing Upsizer Mod as well as a mod that can allow you to make Snowballs.

Fuel Controller
Requires a form of Solid Fuel.
You can heat up your Smeltery to much higher temperatures than with Liquid Fuels (Still required to make the Smeltery work). You can increase the Ratio with Speed Upgrades.

Casting Machine
Requires Snowballs as Fuel for Casting Items.
You can speed up the casting process with Speed Upgrades, Control it with a Redstone Signal, and increase the output capacity. You can also switch between Casts and Basin Mode with an upgrade. Casting Automation can also be achieved by unlocking the cast/upgrade slots. They can only be extracted when the tank is empty and the machine is no longer processing.

Smeltery Input
Inputs items from any item transport (Hoppers, Pipes, Conveyors, etc) in to the Smeltery Controller.

You may use this mod in any modpack, and put a link back to this page as a courtesy!
Project description from CurseForge.
Pick your setup
Smeltery IO by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
1.12.2
1 loader buildCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Smeltery IO versions and loaders
MCT-SmelteryIO-1.12.2-1.3.72-release.jar
26 Aug 2026
MCTSmelteryIO-1.12.2-1.2.63.jar
28 Dec 2020
Looking for an older file? The official CurseForge project page is in Resources.