diff --git a/nhf/touhou/yasaka_kanako/onbashira.py b/nhf/touhou/yasaka_kanako/onbashira.py
index fcba7ba..c2c631b 100644
--- a/nhf/touhou/yasaka_kanako/onbashira.py
+++ b/nhf/touhou/yasaka_kanako/onbashira.py
@@ -40,15 +40,48 @@ class Motor(Model):
     power: float = 30.0 # watts
 
     diam_thread: float = 4.0
-    diam_body: float = 51.82
-    height_body: float = 70.87
-    height_shaft: float = 37.85
+    diam_body: float = 51.0
+    height_body: float = 83.5
+    diam_ring: float = 25.93
+    height_ring: float = 6.55
+    height_shaft: float = 38.1
+    # Distance between anchor and the body
+    dx_anchor: float = 20.2
+    height_anchor: float = 10.4
 
     def __post_init__(self):
+        assert self.diam_ring < self.diam_body
+        assert self.height_ring < self.height_body
+        assert self.dx_anchor < self.diam_body / 2
         pass
 
-    def model(self) -> Cq.Workplane:
-        pass
+    def generate(self) -> Cq.Workplane:
+        result = (
+            Cq.Workplane()
+            .cylinder(
+                radius=self.diam_body/2,
+                height=self.height_body - self.height_ring,
+                centered=(True, True, False)
+            )
+            .faces(">Z")
+            .cylinder(
+                radius=self.diam_ring/2,
+                height=self.height_ring,
+                centered=(True, True, False)
+            )
+        )
+        shaft = Cq.Solid.makeCylinder(
+            radius=self.diam_thread/2,
+            height=self.height_shaft,
+            pnt=(0, 0, self.height_body)
+        )
+        anchor = Cq.Solid.makeCylinder(
+            radius=self.diam_thread/2,
+            height=self.height_anchor,
+            pnt=(0, 0, self.height_body - self.height_ring)
+        )
+        result = result + shaft + anchor.moved(self.dx_anchor, 0, 0) + anchor.moved(-self.dx_anchor, 0, 0)
+        return result
 
 
 @dataclass