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

The Grinder is a device located in Janey Springs's workshop in Concordia, and is usable after completing the mission Grinders for Springs. The Grinder consumes three weapons or items fed to it and produces a new random weapon as a result.

The items fed to 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.

The level requirement of the produced item is the average of the level requirements of the input items, rounded down.

Moonstone-assisted grinds significantly increase the chances of an optimal result, and may also result in Luneshine bonuses.

Recipes

The following list may be incomplete.

Weapons
Output Input Notes
1 purple weapon of desired type + 2 legendary weapons Without moonstone, there is a chance of getting purple. With moonstone, there is a chance of getting a Luneshine weapon.
3 legendary weapons of any type (same type gives random legendary) Without moonstone, there is a chance of getting purple. With moonstone, there is a chance of getting a Luneshine weapon.
2 purple weapons of the desired type + 1 additional purple weapon Cannot do a moonstone grind with this. There is a chance of getting a Legendary weapon.
3 purple weapons of different types Cannot do a moonstone grind with this. There is a chance of getting a Legendary weapon.
2 blue weapons of desired type + 1 Additional blue weapon Without moonstone, there is a chance of getting a blue. With moonstone, there is a chance of getting a Luneshine weapon.
3 blue weapons of different types Without moonstone, there is a chance of getting a blue.
2 green weapons of desired type + 1 additional green weapon Without moonstone, there is a chance of getting a green.
3 green weapons of different types Without moonstone, there is a chance of getting a green.
2 white weapons of desired type + 1 additional white weapon Without moonstone, there is a chance of getting a white.
3 white weapons of different types Without moonstone, there is a chance of getting a white.
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.
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.
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.
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.
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.
Shields, Oz Kits, Class Mods, Grenade Mods
Output Input Notes
3 purple items of the same type Without moonstone, there is a chance of getting a purple. Does not work with Class Mods.
3 blue items of the same type Without moonstone, there is a chance of getting a blue.
3 green items of the same type Without moonstone, there is a chance of getting a green.
3 white items of the same type Without moonstone, there is a chance of getting a white.

Notes

  • Input class mods may be for any class, including different classes. The only requirement is that they have the same rarity.
  • Any class mod produced will always be of the type usable by the current character.
  • It is not possible to obtain the Excalibastard from a Grinder recipe.
  • A hotflix 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.
  • Combining three random purple weapons have a chance to produce a random legendary weapon.
  • The level of the gear produced by the Grinder corresponds with the lowest level item put into the Grinder.
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