diff --git a/app/Console/Commands/BendingCleanReimport.php b/app/Console/Commands/BendingCleanReimport.php
index 875d6b01..8297dbc5 100644
--- a/app/Console/Commands/BendingCleanReimport.php
+++ b/app/Console/Commands/BendingCleanReimport.php
@@ -105,7 +105,8 @@ private function importItem(object $row): BendingItem
 
         $bi = BendingItem::create([
             'tenant_id' => $this->tenantId,
-            'code' => $code,
+            'code' => mb_substr($code, 0, 2),
+            'lot_no' => $code,
             'legacy_code' => "CHANDJ-{$row->num}",
             'legacy_bending_id' => $row->num,
             'item_name' => $row->itemName ?: "부품#{$row->num}",
@@ -275,7 +276,7 @@ private function generateCode(object $row): string
         // 중복 방지 일련번호
         $seq = 1;
         while (BendingItem::where('tenant_id', $this->tenantId)
-            ->where('code', $seq === 1 ? $base : "{$base}-" . str_pad($seq, 2, '0', STR_PAD_LEFT))
+            ->where('lot_no', $seq === 1 ? $base : "{$base}-" . str_pad($seq, 2, '0', STR_PAD_LEFT))
             ->exists()) {
             $seq++;
         }
diff --git a/app/Console/Commands/BendingImportMissing.php b/app/Console/Commands/BendingImportMissing.php
index 22b9cffc..593f27c2 100644
--- a/app/Console/Commands/BendingImportMissing.php
+++ b/app/Console/Commands/BendingImportMissing.php
@@ -77,7 +77,8 @@ private function importItem(object $row): BendingItem
 
         $bi = BendingItem::create([
             'tenant_id' => $this->tenantId,
-            'code' => $code,
+            'code' => mb_substr($code, 0, 2),
+            'lot_no' => $code,
             'legacy_code' => "CHANDJ-{$row->num}",
             'legacy_bending_id' => $row->num,
             'item_name' => $row->itemName ?: "부품#{$row->num}",
@@ -177,7 +178,7 @@ private function generateCode(object $row): string
         // 중복 방지 일련번호
         $seq = 1;
         while (BendingItem::where('tenant_id', $this->tenantId)
-            ->where('code', $seq === 1 ? $base : "{$base}-" . str_pad($seq, 2, '0', STR_PAD_LEFT))
+            ->where('lot_no', $seq === 1 ? $base : "{$base}-" . str_pad($seq, 2, '0', STR_PAD_LEFT))
             ->whereNull('length_code')
             ->exists()) {
             $seq++;
diff --git a/app/Console/Commands/BendingModelImport.php b/app/Console/Commands/BendingModelImport.php
index ce22c57e..e5cd70f1 100644
--- a/app/Console/Commands/BendingModelImport.php
+++ b/app/Console/Commands/BendingModelImport.php
@@ -120,7 +120,8 @@ private function importModel(object $row, string $type, string $code, array $dat
         $bm = BendingModel::create(array_merge($data, [
             'tenant_id' => $this->tenantId,
             'model_type' => $type,
-            'code' => $code,
+            'code' => explode('-', $code)[0],
+            'lot_no' => $code,
             'legacy_num' => $row->num,
             'components' => $components,
             'material_summary' => $materialSummary,
diff --git a/app/Console/Commands/MigrateBendingItemsToNewTable.php b/app/Console/Commands/MigrateBendingItemsToNewTable.php
index 029b987e..dedfed1c 100644
--- a/app/Console/Commands/MigrateBendingItemsToNewTable.php
+++ b/app/Console/Commands/MigrateBendingItemsToNewTable.php
@@ -90,7 +90,8 @@ private function migrateItem(Item $item, int $tenantId): BendingItem
 
         $bi = BendingItem::create([
             'tenant_id' => $tenantId,
-            'code' => $item->code,
+            'code' => mb_substr($item->code, 0, 2),
+            'lot_no' => $item->code,
             'legacy_code' => $item->code,
             'legacy_bending_id' => $opts['legacy_bending_num'] ?? null,
             // 정규 컬럼 (options에서 승격)
diff --git a/app/Http/Resources/Api/V1/GuiderailModelResource.php b/app/Http/Resources/Api/V1/GuiderailModelResource.php
index ba94ab04..f77f4c34 100644
--- a/app/Http/Resources/Api/V1/GuiderailModelResource.php
+++ b/app/Http/Resources/Api/V1/GuiderailModelResource.php
@@ -19,6 +19,7 @@ public function toArray(Request $request): array
         return [
             'id' => $this->id,
             'code' => $this->code,
+            'lot_no' => $this->lot_no,
             'name' => $this->name,
             'is_active' => $this->is_active,
             // MNG2 호환
diff --git a/app/Models/BendingModel.php b/app/Models/BendingModel.php
index cd72abe8..742af838 100644
--- a/app/Models/BendingModel.php
+++ b/app/Models/BendingModel.php
@@ -16,7 +16,7 @@ class BendingModel extends Model
     protected $table = 'bending_models';
 
     protected $fillable = [
-        'tenant_id', 'model_type', 'code', 'name', 'legacy_code', 'legacy_num',
+        'tenant_id', 'model_type', 'code', 'lot_no', 'name', 'legacy_code', 'legacy_num',
         'model_name', 'model_UA', 'item_sep', 'finishing_type', 'author', 'remark',
         'check_type', 'rail_width', 'rail_length',
         'exit_direction', 'front_bottom_width', 'box_width', 'box_height',