Gear¶

Gear is the set of parts you install inside a machine: Heat Cores, Crush Heads, Servos, Battery Cells, and more. The machine block decides what kind of machine it is; its Gear decides much of what it can actually do, such as how hot it gets, how hard an ore it can crush, or how much FE it stores.

Every Gear part is its own item with its own rarity and affixes, so two Iron Heat Cores can perform differently.

The Gear tab¶

Machines that take Gear have a Gear tab in their screen. Each slot accepts one kind of part.

Required slots must be filled before the machine runs. A Crusher with no Crush Head does nothing.
Optional slots add stats or unlock extra behavior.
Hover an empty slot to see what it accepts. Hold Shift for example items.
With JEI installed, the Machine Gear category lists every machine's slots, and looking up a part's uses shows which machines take it.

You install Gear by hand. Pipes, hoppers, and connectors cannot reach Gear slots, with one exception: Crushers and electric Furnaces accept Battery Cells from their sides.

Stage caps¶

Gear parts have a stage, just like machines. Most slots only accept parts up to the machine's own stage: a Bronze (Stage 3) Crusher takes a Bronze Crush Head or lower, not a Steel one. The tooltip shows each part's stage.

A few slots work differently:

Some machines need a minimum stage instead, such as the Coal Gasifier's Stage 5+ Heat Core.
The Metal Press and Melter take Heat Cores only up to Stage 6.
Some slots take any stage. These are noted in the tables below.
On a Crusher, the Component Mount nodes in Machine Mastery can raise the Crush Head limit by one stage per node.

Uniques are found parts that count as a fixed stage, shown in their tooltip, for every one of these rules. They fit wherever a normal part of their type and stage fits.

Each crafted part rolls its own rarity and affixes, and you can refine it in the Affix Forge. Parts do not stack. A part's affixes are local: they scale that part's own stats, and the result is then added to the machine. Holding Shift on a tooltip marks these rolls "(Local)". Rolls without the mark, such as a Fluid Pump's Fluid Capacity, apply to the machine as they are.

Higher-stage parts are crafted from fresh materials, not from the previous part. You can keep a well-rolled part in service and craft the next stage separately. The Nullite Servo is the one part that upgrades from an older part, the Titanium Servo. It rolls fresh traits: the Titanium Servo's affixes and RP are lost.

Many parts you no longer need can be broken down for materials in a Component Recycler.

Part families¶

Crush Heads¶

A Crush Head sets the hardness level your machine can crush, from 1 to 8. The Crusher can still crush ores above its head's level, but slower, at higher FE cost, and with a chance to jam.

Crush Head	Stage	Hardness
Flint Crush Head	0	1
Iron Crush Head	1	2
Copper Crush Head	2	2
Bronze Crush Head	3	3
Steel Crush Head	4	4
Aluminum Crush Head	5	5
Titanium Crush Head	6	6
Tungstensteel Crush Head	7	7
Exotic Crush Head	8	8

The Flint Crush Head is cheap starter tooling with slower processing.

Used in: Crusher (required, up to the chassis stage), Melter (required, any stage, sets the processing level for melts), and the Miner's Companion (required).

Ingredients	Crafting recipe	Notes
Iron Plate + Flint + Iron Gear + Redstone Dust		Requires the Iron material to be enabled.

Heat Cores¶

Heat Cores set heat. In heated processors they decide maximum temperature, how fast the machine warms up, and how steady the heat is. In solid fuel burners they set FE/t output and the highest fuel tier you can burn.

Heat Core	Stage	Notes
Iron Heat Core	1
Copper Heat Core	2
Bronze Heat Core	3
Steel Heat Core	4
Aluminum Heat Core	5	Fast but low-heat sidegrade.
Sparksteel Heat Core	5
Titanium Heat Core	6
Exotic Heat Core	8	Highest heat.

Used in:

Machine	Slot
Electric Furnace	Required, up to the chassis stage. The Lead Furnace has four, one per lane.
Alloy Furnace	Required, up to the chassis stage.
Solid Fuel Burner	Required, up to the burner's stage.
Metal Press	Required, up to Stage 6.
Melter	Required, up to Stage 6.
Coal Gasifier	Required, Stage 5 or higher.
Steam Methane Reformer	Required, Stage 6 or higher.
Cavitation Generator	Optional, any stage.

The Furnace page lists the temperature each core reaches, and the Solid Fuel Burner page lists each core's FE/t and fuel tier.

Ingredients	Crafting recipe	Notes
Redstone Dust + Iron Coil + Coal + Heat Core		Requires the Iron material to be enabled.

Alloy Crucibles¶

The crucible sets how many input slots an Alloy Furnace has and adds mixing stability and speed.

Alloy Crucible	Stage	Input slots
Bronze Alloy Crucible	3	3
Steel Alloy Crucible	4	3
Titanium Alloy Crucible	6	4

Used in: Alloy Furnace (required, up to the chassis stage).

Ingredients	Crafting recipe	Notes
Bronze Ingot + Bronze Casing		Requires the Bronze material to be enabled.

Fuel Boxes¶

The Fuel Box sets a burner's fuel slots, which fuel forms it burns, and fuel behaviors such as the Fuel Governor.

Fuel Box	Stage	Fuel slots	Fuel forms
Iron Fuel Box	1	1	Items
Copper Fuel Box	2	1	Items
Bronze Fuel Box	3	2	Items
Steel Fuel Box	4	2	Items and compact fuel blocks

Used in: Solid Fuel Burner (required, up to the burner's stage). That page explains each box's behaviors.

Bio Chamber¶

The Bio Chamber adds power, fuel duration, and fuel efficiency to bio fuels. Its affixes can favor particular crops or prepared biomass fuels.

Used in: Bio Generator (required) and Algae Photobioreactor (required), where it scales algae output.

Potential Reactor parts¶

The Potential Reactor uses three part types:

Reactor Chamber (required): its stage decides which inputs the reactor can process, and it sets salvage generation and stability.
Recovery Filter (optional): enables residue recovery and improves salvage.
Containment Lining (optional): improves stability.

Stage	Reactor Chamber	Recovery Filter	Containment Lining
1	Iron Reactor Chamber	Iron Recovery Filter	Iron Containment Lining
2	Copper Reactor Chamber	Copper Recovery Filter	Copper Containment Lining
3	Bronze Reactor Chamber	Bronze Recovery Filter	Bronze Containment Lining
4	Steel Reactor Chamber	Steel Recovery Filter	Steel Containment Lining

Recovery Filters also fit the Component Recycler (optional, up to the chassis stage), where they unlock filter-only outputs, and the Miner's Companion, where they unlock rare trace recovery.

Disassembly Heads¶

A Disassembly Head sets the processing level, speed, and stability of a powered Component Recycler. Recycling recipes need a head of at least their level.

Disassembly Head	Stage
Iron Disassembly Head	1
Copper Disassembly Head	2
Bronze Disassembly Head	3
Steel Disassembly Head	4
Aluminum Disassembly Head	5
Titanium Disassembly Head	6
Tungstensteel Disassembly Head	7
Exotic Disassembly Head	8

Used in: Component Recycler (required, up to the chassis stage).

Servos¶

Servos add processing speed, stability, temperature stability, and overheat tolerance. Stage 6 and higher Servos also soften the strain from short power drops.

Servo	Stage	Notes
Steel Servo	4	Needs no Lubricant to craft.
Titanium Servo	6
Tungstensteel Servo	7
Nullite Servo	7	Sidegrade: half processing speed, but Auto Purge lets fluid machines void overflowing output fluid instead of stopping.
Exotic Servo	8

Titanium and higher Servos need Lubricant and can also be made in the Component Assembler.

Used in:

Machine	Slot
Metal Press	Required on the Metal Press, optional on the Crude Metal Press. Any stage.
Alloy Furnace	Optional, up to the chassis stage.
Melter	Optional, any stage.
Coal Gasifier, Syngas Combustor, Steam Methane Reformer	Optional, Stage 4 or higher.
Compressor Tank (Steel and higher)	Four slots, at least one required, up to the tank's stage.
Cavitation Generator	Optional, Stage 6 or higher.

Ingredients	Crafting recipe	Notes
Redstone Dust + Bronze Plate + Steel Ingot + Basic Electric Circuit		Requires the Bronze material to be enabled. Requires the Steel material to be enabled.

Fluid Pumps¶

Fluid Pumps move fluid out of, or into, a machine. Their transfer rate before affixes:

Fluid Pump	Stage	Transfer
Osmium Fluid Pump	5	125 mB/t
Titanium Fluid Pump	6	250 mB/t
Tungstensteel Fluid Pump	7	500 mB/t
Exotic Fluid Pump	8	1,000 mB/t

Used in: Melter (required, lets it fill containers and pipe out fluid), Corrosion Cell (optional, lets it fill with Electrolyte Solution from the side), Bio Generator (optional, exports its gas as Methane), and the Forestry Companion cart (optional, used by the Field Hand sprinkler; see Machine Mastery). Any stage fits.

Ingredients	Crafting recipe	Notes
Osmium Plate + Osmium Gear + Advanced Electric Circuit + Pump Frame		Requires the Osmium material to be enabled.

Cathodes¶

A Cathode sets the highest-stage Anode a Corrosion Cell can burn, and rolls generation, efficiency, speed, and stability affixes for the cell.

Cathode	Stage
Aluminum Cathode	5
Titanium Cathode	6
Tungstensteel Cathode	7
Naquadah Cathode	8

Used in: Corrosion Cell (optional, needed to burn Anodes).

Resonance Calibrator parts¶

The Resonance Calibrator takes three part types, all from the same six materials:

Resonance Coil (required): its stage sets which calibration recipes the machine can reach, and it adds calibration quality.
Control Board (required): improves precision, stability, and Refinement Potential outcomes.
Stabilizer Matrix (optional): raises the stability floor and improves catalyst efficiency.

Stage	Resonance Coil	Control Board	Stabilizer Matrix
1	Iron Resonance Coil	Iron Control Board	Iron Stabilizer Matrix
2	Copper Resonance Coil	Copper Control Board	Copper Stabilizer Matrix
4	Steel Resonance Coil	Steel Control Board	Steel Stabilizer Matrix
6	Titanium Resonance Coil	Titanium Control Board	Titanium Stabilizer Matrix
7	Tungstensteel Resonance Coil	Tungstensteel Control Board	Tungstensteel Stabilizer Matrix
7	Nullite Resonance Coil	Nullite Control Board	Nullite Stabilizer Matrix

Used in: Resonance Calibrator, any stage.

Ingredients	Crafting recipe
Redstone Dust + Energy Coil + Iron Ingot

Cavitation Rotors¶

The rotor drives a Cavitation Generator. Its stage decides which recipes the generator can run, and it wears down as it works. A fully worn rotor is ejected as a Pitted Cavitation Rotor, which you can salvage in a Component Recycler.

Cavitation Rotor	Stage	Notes
Steel Cavitation Rotor	5
Titanium Cavitation Rotor	6
Nitrogen Extraction Rotor	6	Low power. With a Nitrogen Separation Nozzle, makes Nitrogen from water.
Tungstensteel Cavitation Rotor	7
Aethergold Cavitation Rotor	7	Burst rotor: much more generation and speed, but wears out quickly.
Nullite Cavitation Rotor	8

Used in: Cavitation Generator (required).

Ingredients	Crafting recipe	Notes
Steel Gear + Cavitation Rotor Hub		Cavitation Rotor Hub must be a Kinetic calibration, Stage 5+, stability 20+.

Collapse Nozzles¶

Collapse Nozzles focus output and stability in the two collapse generators.

Collapse Nozzle	Stage	Notes
Steel Collapse Nozzle	5
Titanium Collapse Nozzle	6
Nitrogen Separation Nozzle	6	Cavitation Generator only. Needed for Nitrogen.
Tungstensteel Collapse Nozzle	7
Nullite Collapse Nozzle	8
Exotic Collapse Nozzle	8

Used in: Cavitation Generator (required) and Vacuum Collapse Generator (required). In the Vacuum Collapse Generator a nozzle below the recipe's stage still works but adds instability.

Void Chambers and Dimensional Stabilizers¶

The Vacuum Collapse Generator needs both. The Void Chamber's stage decides which recipes it can run and adds generation and stability. The Dimensional Stabilizer improves stability, efficiency, and residue handling.

Stage	Void Chamber	Dimensional Stabilizer
7	Tungstensteel Void Chamber	Tungstensteel Dimensional Stabilizer
8	Nullite Void Chamber	Nullite Dimensional Stabilizer
8	Exotic Void Chamber	Exotic Dimensional Stabilizer

Used in: Vacuum Collapse Generator (both required).

Catalyst Beds and membranes¶

These single-item parts gate the gas chemistry machines' recipes and tune their speed, efficiency, and stability. The Biogas Membrane instead sets how much Methane a Bio Generator take-off recovers; it rolls no affixes.

Part	Used in
Ammonia Catalyst Bed	Ammonia Synthesizer (required)
Reforming Catalyst Bed	Steam Methane Reformer (required)
Fuel Cell Membrane	Fuel Cell (required)
Biogas Membrane	Bio Generator (optional, Gas Line slot)

Ingredients	Crafting recipe
Paper + Redstone Dust + Titanium Casing

Battery Cells¶

Battery Cells store FE inside a machine. Most powered machines have an optional cell slot, and running without one usually costs speed or output. See Battery Cells.

Energy Connectors¶

Two machines take an Energy Connector module in a Gear slot so they can accept FE, up to the connector's tier: the Tool Bench and Forestry Cart Station. Generators have no Energy Connector slot; the Energy Connector in the attached Universal Connector sets how fast their FE moves. Any tier fits, from the Crude Energy Connector up to the Exotic Energy Connector. See Universal Cable for the tiers. In older worlds, an Energy Connector that sat in a Cavitation Generator, Vacuum Collapse Generator, or Solar Array Controller leaves the machine on its own. It goes into an adjacent chest or other item inventory if one has room. Otherwise the machine keeps it until a player comes within 16 blocks, then drops it next to the machine. Breaking the machine also drops it.

Other Gear-tab items¶

A few machines store tools in their Gear tab rather than rolled parts:

Metal Press: five Mold slots, with one active mold.
Resonance Calibrator: six Calibration Pattern slots, with one active pattern.
Affix Forge: three upgrade slots.
Tool Bench: a Tiny Anvil slot.
Solar Panel array controllers: a Solar Array Extender slot.

Guides	Automation · Battery Cells · Dormant Machines · Gear · Getting Started · Heat · Machine Mastery · Machine Stats · Modpack Creators · Power Chains · Rarity and Affixes · Stages · Uniques
Processing	Alloy Furnace · Component Assembler · Component Recycler · Crusher · Furnace · Melter · Metal Press · Resonance Calibrator · Wooden Composter
Power generation	Bio Generator · Cavitation Generator · Corrosion Cell · Fuel Cell · Potential Reactor · Solar Panel · Solid Fuel Burner · Syngas Combustor · Vacuum Collapse Generator
Energy storage	Battery Chassis
Fluids and gases	Algae Photobioreactor · Ammonia Synthesizer · Coal Gasifier · Fluid and Compressor Tanks · Silica Gel Dehumidifier · Steam Methane Reformer · Wooden Dehumidifier
Refinement	Affix Forge · Exotic Affix Forge
Logistics	Universal Cable
Tools	Forestry Cart Station · Miner's Companion · Modular Tools · Tool Bench