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The Reassembly Machine disassembles and reassembles ATLAS and P-body at the beginning and end of each test chamber, respectively.

Overview

At the end of most test chambers, the robots are disassembled in order to be transported to a new chamber through the pneumatic pulls of the Pipe Network. After the components of ATLAS and P-body arrive at a destination set by GLaDOS, they are reassembled.

Occasionally, when one or both of the robots are destroyed during testing, GLaDOS comments on how the Reassembly Machine has better things to do then to constantly reassemble the duo.

Trivia

• Despite the community believing the Reassembly Machine and the "disassembly" machine are two different things, they are not. The arms inside the Reassembly Machine can be tasked to either disassemble or reassemble ATLAS and P-body. This is proven when the Reassembly Machine was seen in the intro video of Calibration Course and later the same machine was repurposed to disassemble the two, ultimately proving that the Reassembly Machine would be building the bots off-screen (seconds before they are spawned).
• It is possible that the Reassembly Machine can be used to make other testing elements, as it was never observed exactly how a Weighted Storage Cube was built.
• This is further supported by a similar mechanism used to build Turrets in the Turret Manufacturing area.

List of appearances

• Portal 2 (First appearance)

Technology
Aperture Science	1500 Megawatt Heavy Duty Super-Colliding Super Button • Advanced Knee Replacement • Aerial Faith Plate • Announcement System • ATLAS and P-body • Borealis • Core Input Receptacle • Crusher • Edgeless Safety Cube Receptacle • Edgeless Safety Cube • Emergency Intelligence Incinerator • Excursion Funnel • Frankenturret • Futbol (cut) • GLaDOS • Hard Light Bridge • High Energy Pellet • Jerry • Laser Field • Long Fall Boot • Material Emancipation Grill • Military Android • Mobility Gels: Conversion Gel / Propulsion Gel / Repulsion Gel • Multitasking Arm • Nanobot • Panel • Party Escort Bot • Personality Construct • Pipe Network • Pneumatic Diversity Vent • Cube Button • Radio • Reassembly Machine • Relaxation Vault • Robot Enrichment • Robot Worker • Scaling Cube • Security Camera • Shredder • Speaker System • Stasis Chamber • Sticking Gel (cut) • Switch • Teleportation • Thermal Discouragement Beam • Unstationary Scaffold • Victory Lift • Vital Apparatus Vent • Weighted Pivot Cube • Weighted Storage Cube • Wheatley
Black Mesa	Anti-Mass Spectrometer • Battery • Black Mesa Announcement System • Charger • Cleansuit • Delivery cart • Emergency flare (cut) • HEV Suit • Holographic Assistant • Long Jump Module • Medkit • The Mesa Times • MTM 8 • Oxygen Bottles (cut) • Powerup Bottles (cut) • Retinal scanner • Satellite Delivery Rocket • Security Card (cut) • Armor Vest and Helmet • Teleportation • Vehicles • Weapon Box • Weapons
Black Ops	Cloaking device • Weapons
Combine	Battery • Breencast • Charger • Citadel Core • Citadel • Barricade • Binoculars • Binoculars (cut) • Bunker • Camera • Cell • Combine Assassin tank (cut) • Combine Big Momma Pod (cut) • Confiscation Field • Dark Energy • Depot • Dispenser • Door lock • Door Tower (cut) • Dr. Breen's Private Reserve • Elevator • Emergency flare • Emitter • Energy Ball • Field Bridge • Force Field • Heavy Door • Heel Springs (cut) • Interface • Light • Medkit • Memory Replacement • Monitor • Overwatch Voice • Power Generator • Restrictor • Security Door • Smart Barrier • Supply Crate • Suppression Field • Teleportation • Television • The Terminal • Vehicles • Watchtower • Weapons • Vorti-Cell (cut)
Resistance	Borealis (cut) • Car battery • Communication • Antlion Detector • Dog • EMP Tool • Fire Extinguisher (cut) • Generator trailer • Drawbridge • Retinal scanner • Supply Crate • Teleportation • Television • Transponder • Vehicles • Weapons • White Forest rocket
Xen	Healing Shower • Thumper
HECU	Powered Combat Vest • Radio • Tactical Map • Welding Torch
Other	Garden Gnome

Aperture Science
Personnel	Caroline • Chell • Desk Employee • Henry • Cave Johnson • Doug Rattmann • Greg • Mel (cut) • Test Subject • Test Subject 042 • Test Subject 234 • Minor Aperture Science employees
Technology	1500 Megawatt Heavy Duty Super-Colliding Super Button • Advanced Knee Replacement • Aerial Faith Plate • Announcement System • Borealis • Core Input Receptacle • Crusher • Edgeless Safety Cube • Edgeless Safety Cube Receptacle • Emergency Intelligence Incinerator • Excursion Funnel • Futbol (cut) • Handheld Portal Device • Hard Light Bridge • High Energy Pellet • Laser Field • Long Fall Boot • Material Emancipation Grill • Mobility Gels: Conversion Gel / Propulsion Gel / Repulsion Gel / Sticking Gel (cut) • Multitasking Arm • Pipe Network • Pneumatic Diversity Vent • Panel • Cube Button • Radio • Reassembly Machine • Relaxation Vault • Security Camera • Scaling Cube • Shredder • Speaker System • Stasis Chamber • Switch • Teleportation • Thermal Discouragement Beam • Unstationary Scaffold • Victory Lift • Vital Apparatus Vent • Weighted Pivot Cube • Weighted Storage Cube
Robots	Robot Worker • ATLAS and P-body • GLaDOS • Grady • Jerry • Military Android • Nanobot • Party Escort Bot • Personality Construct • Robot Enrichment • Wheatley
Weapons	Bomb • Hover Turret (cut)
Sentry Turrets	Animal King • Frankenturret • Defective Turret • Oracle Turret • Rocket Sentry • Sentry Turret • Turret Opera
Locations	Borealis • Employee Daycare Center • Enrichment Center • Enrichment Shafts: Co-op Test Shaft / Test Shaft 09 • Extended Relaxation Annex • Extended Relaxation Center • Central AI Chamber • Hub • Incinerator Room • Neurotoxin Generator • Testing Tracks: GLaDOS' Testing Track (Portal) / GLaDOS' Testing Track (Portal 2) / Wheatley's Testing Track / Cooperative Testing Courses • Turret Manufacturing
Other	Aperture Science Collaborative Disposition Test • ApertureScience.com • Cake • Enrichment Center Test Subject Application Process • GLaDOS' screen images • Hoopie • Karla the Complainer • Mantis Man