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For the grinder in Borderlands 2, see The Overlooked: Shields Up.
GrinderPreSequel

The Grinder in Concordia

The Grinder is a "crafting station" device in Borderlands: The Pre-Sequel which consumes three weapons or items fed into it and produces a new, randomly selected item as a result. There is one grinder available in the base-game of Borderlands: The Pre-Sequel, found in Janey Springs' workshop in Concordia, which becomes available for use after the mission Grinders is completed. A second grinder is made available in Claptastic Voyage, which is found beside SYS_ADMIN in The Nexus.

The items fed into the grinder must conform to a recipe, which determines the type and quality of the output. A recipe defines a combination of item types and rarities taken as input and what rarity and type the resulting output may be.

Items of common and uncommon rarity listed as mission rewards, given within a mission, and/or having a predefined set of parts by any other means, cannot be ground. Examples include: Springs' Oz Kit, the Fervid Provacateur found in Concordia's Bank during the mission "Systems Jammed", and cryo weapons from the chest opened by Dr. Spara during It Ain't Rocket Surgery. Unique mission rewards are counted as standard blue items though, including ones found in chests.

The level requirement of the produced item is the average of the level requirements of the input items, rounded down. For example: inputting one level 50 item, one level 49 item, and one level 45 item will result in a level 47 item.

Moonstone-assisted grinds guarantee the optimal rarity (for example: moonstone-grinding three blue weapons will guarantee a purple weapon in return), and may also result in a Luneshine bonus. However, only certain recipes allow for Moonstone grinds.

Recipes

Please note: the following list may be incomplete.

Weapons
Output Input Notes
3 glitch weapons * Moonstone grinds are not possible.
3 legendary weapons of any type (same type gives random legendary) * Moonstone grinds are not possible.
1 purple weapon of desired type + 2 legendary weapons * Moonstone grinds are not possible with grinds using Claptastic Voyage legendaries.
* Guaranteed to be a legendary weapon with moonstones. 
* With moonstones, there is a chance of getting a Luneshine bonus.
2 purple weapons of the desired type + 1 additional purple weapon * Moonstone grinds are not possible.
* There is a chance of getting a Legendary weapon.
3 purple weapons of different types * Moonstone grinds are not possible.
* There is a chance of getting a Legendary weapon.
2 blue weapons of desired type + 1 Additional blue weapon * Guaranteed to be a purple weapon with moonstones.
* With moonstones, there is a chance of getting a Luneshine bonus.
3 blue weapons of different types * Guaranteed to be a purple weapon with moonstones.
* With moonstones, there is a chance of getting a Luneshine bonus.
2 green weapons of desired type + 1 additional green weapon * Guaranteed to be a blue weapon with moonstones.
* With moonstones, there is a chance of getting a Luneshine bonus.
3 green weapons of different types * Guaranteed to be a blue weapon with moonstones.
* With moonstones, there is a chance of getting a Luneshine bonus.
2 white weapons of desired type + 1 additional white weapon * Guaranteed to be a green weapon with moonstones.
* With moonstones, there is a chance of getting a Luneshine bonus.
3 white weapons of different types * Guaranteed to be a green weapon with moonstones.
* With moonstones, there is a chance of getting a Luneshine bonus.
1 SMG + 1 Sniper Rifle + 1 Shield, all of the same rarity * Input must be blue or below. Output rarity will be the same or one higher than the input rarity.
* With moonstones, there is a chance of getting a Luneshine bonus.
2 weapons + 1 Grenade Mod, all of the same rarity * Input must be blue or below. Output rarity will be the same or one higher than the input rarity.
* With moonstones, there is a chance of getting a Luneshine bonus.
1 Pistol + 1 SMG + 1 Shield, all of the same rarity * Input must be blue or below. Output rarity will be the same or one higher than the input rarity.
* With moonstones, there is a chance of getting a Luneshine bonus.
1 Assault Rifle + 1 Pistol + 1 Shield, all of the same rarity * Input must be blue or below. Output rarity will be the same or one higher than the input rarity.
* With moonstones, there is a chance of getting a Luneshine bonus.
1 Assault Rifle + 1 Shotgun + 1 Shield, all of the same rarity * Input must be blue or below. Output rarity will be the same or one higher than the input rarity.
* With moonstones, there is a chance of getting a Luneshine bonus.
Shields, Oz Kits, Class Mods & Grenade Mods
Output Input Notes
3 purple items of the same type * Moonstone grinds are only possible with class mods.
* Guaranteed to be a legendary item with moonstones.
3 blue items of the same type * Guaranteed to be a purple item with moonstones.
3 green items of the same type * Guaranteed to be a blue item with moonstones.
3 white items of the same type * Guaranteed to be a green item with moonstones.

Quotes

  • Welcome
    • "Dahl Grinder, ready for service!"
    • "Grinder is ready to operate."
    • "Give me something to grind here, soldier!"
    • "Grinder on duty!"
    • "This Dahl Grinder is operational."
    • "Grinder is good to go!"
    • "This Grinder is ready for use!"
    • "Grinder technology is trademark protected."
    • "Dahl Grinders: you find it, we grind it."
    • "Dahl Grinder technology: grinding what you find!"
  • Grinder Idle
    • "Three items, soldier."
    • "You're grinding nothing at this rate, soldier!"
    • "You need to feed in three, or this grind's going nowhere."
    • "You still there?"
    • "Three items to grind."
    • "Insert three items if you want to grind at this machine!"
    • "You falling alseep on me, soldier?"
    • "Give me three items, soldier!"
    • "Unless you give me three, you get nothing, soldier."
    • "Feed three items, soldier!"
  • Grinder Feeding Error
    • "That is an invalid feed."
    • "Try again, soldier."
    • "Basic training, soldier! That's invalid!"
    • "That is NOT gonna work, soldier!"
    • "What's WRONG with you, maggot!?"
    • "TRY THAT AGAIN, SOLDIER!"
    • "You're a disgrace, soldier!"
    • "Grind feed... rejected."
    • "Move along! Nothing to grind here."
    • "No can do, soldier."
  • Feeding Complete
    • "Grind feed completed."
    • "This Grinder is fed."
    • "Grind about to commence."
    • "Grind sequence initiated."
    • "Grinding commencing."
    • "Grinder activating."
    • "Grinder activating now!"
    • "Grind feed is complete."
    • "Grinder processing now."
  • Finished (Grinded weapon is of the same rarity level as fed weapons)
    • "Enjoy!"
    • "Courtesy of Dahl."
    • "For your soldiering pleasure."
    • "All yours, soldier."
    • "Take it away, soldier."
    • "Made for your death-dealing pleasure."
    • "Now make it count, soldier!"
    • "Make your enemies hurt, soldier."
    • "Unleash hell, soldier!"
    • "Enjoy your next combat situation, courtesy of Dahl."
  • Finished Good (Higher than fed or the same rarity level with luneshine)
    • "You lucked out, soldier!"
    • "Best outcome achieved!"
    • "That's a best result item, soldier! Don't go easy with that."
    • "High quality -- for your death-dealing needs."
    • "Fortune smiles on you, soldier!"
    • "Fate turns in your favor, soldier!"
    • "Best result, soldier!"
    • "Save some luck for the battlefield, soldier!"
    • "Great result! Now make your enemies pay!"
    • "Now with added Lune Shine!"
  • Finished with MoonStone (Higher rarity level with luneshine)
    • "Luneshine -- you can see your face in it!"
    • "This one's Luneshine'd up for you, soldier!"
    • "Appreciate the Luneshine on this one!"
    • "Luneshine is under a Dahl Corporation copyright. Enjoy!"
    • "Luneshine achieved!"
    • "You got the Luneshine, soldier!"
    • "Luneshine -- right here!"
    • "Woah -- Luneshine item!"
    • "That's a Luneshine, soldier! Enjoy it!"
    • "You got the cool... You got the cool Luneshine!"

Notes

  • Input class mods may be for any class, including multiple classes per grind (for example: two Claptrap mods and one Athena mod). The only requirement is that they have the same rarity. The class mod produced will usually - but not always - be of the type usable by the current character.
  • As of the 1.0.2 update, it is possible to obtain the Excalibastard from a Grinder recipe.
  • Some varieties of purple cryo shields with Maliwan parts may be treated as legendary ones.
  • A Compatibility Pack released on November 11th, 2014 added the ability to grind three purple items together, and added recipes for legendary grenade mods, shields, and Oz kits, as well as an extra legendary weapon recipe. The next Compatibility Pack (released on January 27, 2015) permitted players to perform Moonstone grinds with recipes using three purple items, though there was a fatal glitch at the time of release that usually resulted in the game crashing whenever three purple items were put into the Grinder.[1]The subsequent compatibility pack released alongside Claptastic Voyage removed the ability to perform Moonstone grinds on all purple item recipes excluding class mods.
  • Although Concordia's Grinder is intended to only be usable after completing the mission Grinders for Janey Springs, during True Vault Hunter Mode and Ultimate Vault Hunter Mode, it is possible to use the Grinder before this mission becomes available or is accepted from her. To do so, the current character must step very close to the Grinder (almost touching it) and be looking at either side of the centre input device. The Grinder added in Claptastic Voyage is always properly operable, as there is no required mission to fix it.
    • If the Grinders mission is accepted during True or Ultimate Vault Hunter Mode, the Grinder will become unusable until the mission runs its normal course, and will be properly usable after its completion.

Trivia

  • "You got the cool... You got the cool Luneshine!" is a reference to Gorillaz's song 19-2000.