diff --git a/src/Mod/PartDesign/fcsprocket/fcsprocket.py b/src/Mod/PartDesign/fcsprocket/fcsprocket.py
index 651659169d..344ea1e94c 100644
--- a/src/Mod/PartDesign/fcsprocket/fcsprocket.py
+++ b/src/Mod/PartDesign/fcsprocket/fcsprocket.py
@@ -15,10 +15,10 @@
 #   License along with FCGear; if not, write to the Free Software
 #   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 
-from math import cos, sin, pi, acos, asin, atan, sqrt
+from math import acos
 
 import FreeCAD, Part
-from FreeCAD import Base, Console
+from FreeCAD import Base
 from . import sprocket
 rotate = sprocket.rotate
 
diff --git a/src/Mod/PartDesign/fcsprocket/fcsprocketdialog.py b/src/Mod/PartDesign/fcsprocket/fcsprocketdialog.py
index 7360a7235d..d5365eff51 100644
--- a/src/Mod/PartDesign/fcsprocket/fcsprocketdialog.py
+++ b/src/Mod/PartDesign/fcsprocket/fcsprocketdialog.py
@@ -16,7 +16,6 @@
 #   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 
 from PySide import QtGui as qt
-import fcsprocket
 import FreeCAD, FreeCADGui
 
 class SprocketCreationFrame(qt.QFrame):
@@ -51,10 +50,10 @@ class SprocketDialog(qt.QDialog):
         if FreeCAD.ActiveDocument is None:
             FreeCAD.newDocument("Sprocket")
 
-        gear = fcgear.makeSprocket(self.gc.m.value(),
-                               self.gc.Z.value(),
-                               self.gc.angle.value(),
-                               not self.gc.split.currentIndex())
+        gear_unused = fcgear.makeSprocket(self.gc.m.value(),
+                                          self.gc.Z.value(),
+                                          self.gc.angle.value(),
+                                          not self.gc.split.currentIndex())
         FreeCADGui.SendMsgToActiveView("ViewFit")
         return super(SprocketDialog, self).accept()
 
diff --git a/src/Mod/PartDesign/fcsprocket/sprocket.py b/src/Mod/PartDesign/fcsprocket/sprocket.py
index 9c1bc1c6b2..bc29970b10 100644
--- a/src/Mod/PartDesign/fcsprocket/sprocket.py
+++ b/src/Mod/PartDesign/fcsprocket/sprocket.py
@@ -15,7 +15,7 @@
 #   License along with FCGear; if not, write to the Free Software
 #   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 
-from math import cos, sin, tan, sqrt, radians, acos, atan, asin, degrees
+from math import cos, sin, tan, sqrt, radians, atan, asin, degrees
 
 
 def CreateSprocket(w, P, N, Dr):
@@ -31,8 +31,6 @@ def CreateSprocket(w, P, N, Dr):
     """
     Ds = 1.005 * Dr + (0.003 * 25.4)
     R = Ds / 2
-    alpha = 35 + 60/N
-    beta = 18 - 56 / N
     M = 0.8 * Dr * cos(radians(35) + radians(60/N))
     T = 0.8 * Dr * sin(radians(35) + radians(60/N))
     E = 1.3025 * Dr + (0.0015 * 25.4)
@@ -41,8 +39,8 @@ def CreateSprocket(w, P, N, Dr):
     F = Dr * (0.8 * cos(radians(18) - radians(56)/N) + 1.4 *
               cos(radians(17) - radians(64) / N) - 1.3025) - (0.0015 * 25.4)
     PD = P / (sin(radians(180)/N))
-    H = sqrt(F**2 - (1.4 * Dr - P/2)**2)
-    OD = P * (0.6 + 1/tan(radians(180/N)))
+    # H = sqrt(F**2 - (1.4 * Dr - P/2)**2)
+    # OD = P * (0.6 + 1/tan(radians(180/N)))
 
     # The sprocket tooth gullet consists of four segments
     x0 = 0
@@ -52,7 +50,6 @@ def CreateSprocket(w, P, N, Dr):
     alpha = 35 + 60/N
     x1 = -R * cos(radians(alpha))
     y1 = PD/2 - R * sin(radians(alpha))
-    arc_end = [x1, y1]
 
     # ---- Segment 2 -----
     alpha = 35 + 60/N