diff --git a/src/main/java/refinedstorage/gui/GuiCraftingSettings.java b/src/main/java/refinedstorage/gui/GuiCraftingSettings.java
index 3fb9dd258..f63a4052b 100755
--- a/src/main/java/refinedstorage/gui/GuiCraftingSettings.java
+++ b/src/main/java/refinedstorage/gui/GuiCraftingSettings.java
@@ -6,6 +6,7 @@ import net.minecraft.client.gui.GuiTextField;
 import net.minecraftforge.fml.client.FMLClientHandler;
 import org.lwjgl.input.Keyboard;
 import refinedstorage.container.ContainerDummy;
+import refinedstorage.tile.TileController;
 
 import java.io.IOException;
 
@@ -14,7 +15,6 @@ public class GuiCraftingSettings extends GuiBase {
     private GuiGrid gridGui;
     private int id;
     private GuiButton startButton;
-    private boolean isClosed;
 
     public GuiCraftingSettings(GuiGrid gridGui, int id) {
         super(new ContainerDummy(), 143, 61);
@@ -81,7 +81,7 @@ public class GuiCraftingSettings extends GuiBase {
     private void startRequest() {
         Integer quantity = Ints.tryParse(amountField.getText());
 
-        if (quantity != null && quantity > 0) {
+        if (quantity != null && quantity > 0 && quantity <= TileController.MAX_CRAFTING_QUANTITY_PER_REQUEST) {
             gridGui.getGrid().onCraftingRequested(id, quantity);
 
             FMLClientHandler.instance().showGuiScreen(gridGui);
diff --git a/src/main/java/refinedstorage/tile/TileController.java b/src/main/java/refinedstorage/tile/TileController.java
index 1ae872e24..8120e638d 100755
--- a/src/main/java/refinedstorage/tile/TileController.java
+++ b/src/main/java/refinedstorage/tile/TileController.java
@@ -66,6 +66,8 @@ public class TileController extends TileBase implements IEnergyReceiver, ISynchr
 
     public static final String NBT_CRAFTING_TASKS = "CraftingTasks";
 
+    public static final int MAX_CRAFTING_QUANTITY_PER_REQUEST = 100;
+
     private List<ItemGroup> itemGroups = new ArrayList<ItemGroup>();
     private List<IStorage> storages = new ArrayList<IStorage>();
     private List<WirelessGridConsumer> wirelessGridConsumers = new ArrayList<WirelessGridConsumer>();
@@ -755,7 +757,7 @@ public class TileController extends TileBase implements IEnergyReceiver, ISynchr
     }
 
     public void onCraftingRequested(int id, int quantity) {
-        if (id >= 0 && id < itemGroups.size() && quantity > 0) {
+        if (id >= 0 && id < itemGroups.size() && quantity > 0 && quantity <= MAX_CRAFTING_QUANTITY_PER_REQUEST) {
             ItemStack requested = itemGroups.get(id).toItemStack();
             int quantityPerRequest = 0;
             CraftingPattern pattern = getPattern(requested);