diff --git a/src/App/Application.cpp b/src/App/Application.cpp
index f8c5f079ad..9b093ce973 100644
--- a/src/App/Application.cpp
+++ b/src/App/Application.cpp
@@ -1004,11 +1004,14 @@ void Application::initTypes(void)
     App ::PropertyFloatList         ::init();
     App ::PropertyFloatConstraint   ::init();
     App ::PropertyQuantity          ::init();
+    App ::PropertyQuantityConstraint::init();
     App ::PropertyAngle             ::init();
     App ::PropertyDistance          ::init();
     App ::PropertyLength            ::init();
     App ::PropertySpeed             ::init();
     App ::PropertyAcceleration      ::init();
+    App ::PropertyForce             ::init();
+    App ::PropertyPressure          ::init();
     App ::PropertyInteger           ::init();
     App ::PropertyIntegerConstraint ::init();
     App ::PropertyPercent           ::init();
diff --git a/src/App/PropertyUnits.cpp b/src/App/PropertyUnits.cpp
index 8b294d39d3..ae9849baf0 100644
--- a/src/App/PropertyUnits.cpp
+++ b/src/App/PropertyUnits.cpp
@@ -50,7 +50,7 @@ using namespace std;
 
 //**************************************************************************
 //**************************************************************************
-// PropertyFloatUnit
+// PropertyQuantity
 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
 TYPESYSTEM_SOURCE(App::PropertyQuantity, App::PropertyFloat);
@@ -99,26 +99,98 @@ void PropertyQuantity::setPyObject(PyObject *value)
     PropertyFloat::setValue(quant.getValue());
 }
 
+//**************************************************************************
+//**************************************************************************
+// PropertyQuantityConstraint
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+TYPESYSTEM_SOURCE(App::PropertyQuantityConstraint, App::PropertyQuantity);
+
+
+
+void PropertyQuantityConstraint::setConstraints(const Constraints* sConstrain)
+{
+    _ConstStruct = sConstrain;
+}
+
+const PropertyQuantityConstraint::Constraints*  PropertyQuantityConstraint::getConstraints(void) const
+{
+    return _ConstStruct;
+}
+
+void PropertyQuantityConstraint::setPyObject(PyObject *value)
+{
+    Base::Quantity quant;
+
+    if (PyString_Check(value))
+        quant = Quantity::parse(QString::fromLatin1(PyString_AsString(value)));
+    else if (PyFloat_Check(value))
+        quant = Quantity(PyFloat_AsDouble(value),_Unit);
+    else if (PyInt_Check(value))
+        quant = Quantity((double)PyInt_AsLong(value),_Unit);
+    else if (PyObject_TypeCheck(value, &(QuantityPy::Type))) {
+        Base::QuantityPy  *pcObject = static_cast<Base::QuantityPy*>(value);
+        quant = *(pcObject->getQuantityPtr());
+    }
+    else
+        throw Base::Exception("Wrong type!");
+
+    Unit unit = quant.getUnit();
+    double temp = quant.getValue();
+    if (_ConstStruct) {
+        if (temp > _ConstStruct->UpperBound)
+            temp = _ConstStruct->UpperBound;
+        else if (temp < _ConstStruct->LowerBound)
+            temp = _ConstStruct->LowerBound;
+    }
+    quant.setValue(temp);
+
+    if (unit.isEmpty()){
+        PropertyFloat::setValue(quant.getValue());
+        return;
+    }
+
+    if (unit != _Unit)
+        throw Base::Exception("Not matching Unit!");
+
+    PropertyFloat::setValue(quant.getValue());
+}
+
 //**************************************************************************
 //**************************************************************************
 // PropertyDistance
 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
-TYPESYSTEM_SOURCE(App::PropertyDistance, App::PropertyFloat);
+TYPESYSTEM_SOURCE(App::PropertyDistance, App::PropertyQuantity);
+
+PropertyDistance::PropertyDistance()
+{
+    setUnit(Base::Unit::Length);
+}
 
 //**************************************************************************
 //**************************************************************************
 // PropertySpeed
 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
-TYPESYSTEM_SOURCE(App::PropertySpeed, App::PropertyFloat);
+TYPESYSTEM_SOURCE(App::PropertySpeed, App::PropertyQuantity);
+
+PropertySpeed::PropertySpeed()
+{
+    setUnit(Base::Unit::Velocity);
+}
 
 //**************************************************************************
 //**************************************************************************
 // PropertyAcceleration
 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
-TYPESYSTEM_SOURCE(App::PropertyAcceleration, App::PropertyFloat);
+TYPESYSTEM_SOURCE(App::PropertyAcceleration, App::PropertyQuantity);
+
+PropertyAcceleration::PropertyAcceleration()
+{
+    setUnit(Base::Unit::Acceleration);
+}
 
 //**************************************************************************
 //**************************************************************************
@@ -137,8 +209,34 @@ PropertyLength::PropertyLength()
 // PropertyAngle
 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
-TYPESYSTEM_SOURCE(App::PropertyAngle, App::PropertyFloatConstraint);
+TYPESYSTEM_SOURCE(App::PropertyAngle, App::PropertyQuantityConstraint);
 
+PropertyAngle::PropertyAngle()
+{
+    setUnit(Base::Unit::Angle);
+}
 
+//**************************************************************************
+//**************************************************************************
+// PropertyPressure
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
+TYPESYSTEM_SOURCE(App::PropertyPressure, App::PropertyQuantity);
+
+PropertyPressure::PropertyPressure()
+{
+    setUnit(Base::Unit::Pressure);
+}
+
+//**************************************************************************
+//**************************************************************************
+// PropertyForce
+//++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+
+TYPESYSTEM_SOURCE(App::PropertyForce, App::PropertyQuantity);
+
+PropertyForce::PropertyForce()
+{
+    setUnit(Base::Unit::Force);
+}
 
diff --git a/src/App/PropertyUnits.h b/src/App/PropertyUnits.h
index 4cf8a5d1b8..f82f97f73a 100644
--- a/src/App/PropertyUnits.h
+++ b/src/App/PropertyUnits.h
@@ -69,18 +69,56 @@ protected:
     Base::Unit _Unit;
 };
 
+/** Float with Unit property
+ * This is a property for float with a predefined Unit associated .
+ */
+class AppExport PropertyQuantityConstraint : public PropertyQuantity
+{
+    TYPESYSTEM_HEADER();
+
+public:
+    PropertyQuantityConstraint(void){}
+    virtual ~PropertyQuantityConstraint(){}
+
+    /// Constraint methods 
+    //@{
+    /// the boundary struct
+    struct Constraints {
+        double LowerBound, UpperBound, StepSize;
+    };
+    /** setting the boundaries
+     * This sets the constraint struct. It can be dynamically 
+     * allocated or set as an static in the class the property
+     * blongs to:
+     * \code
+     * const Constraints percent = {0.0,100.0,1.0}
+     * \endcode
+     */
+    void setConstraints(const Constraints* sConstrain);
+    /// get the constraint struct
+    const Constraints*  getConstraints(void) const;
+    //@}
+
+    virtual const char* getEditorName(void) const
+    { return "Gui::PropertyEditor::PropertyFloatConstraintItem"; }
+
+    virtual void setPyObject(PyObject *);
+
+
+protected:
+    const Constraints* _ConstStruct;
+};
+
 /** Distance property
  * This is a property for representing distances. It is basically a float
  * property. On the Gui it has a quantity like m or mm.
  */
-class AppExport PropertyDistance: public App::PropertyFloat
+class AppExport PropertyDistance: public PropertyQuantity
 {
     TYPESYSTEM_HEADER();
 public:
-    PropertyDistance(void){}
+    PropertyDistance(void);
     virtual ~PropertyDistance(){}
-    virtual const char* getEditorName(void) const
-    { return "Gui::PropertyEditor::PropertyFloatItem"; }
 };
 
 /** Length property
@@ -99,11 +137,11 @@ public:
  * This is a property for representing angles. It basicly a float
  * property. On the Gui it has a quantity like RAD.
  */
-class AppExport PropertyAngle: public PropertyFloatConstraint
-{
+class AppExport PropertyAngle: public PropertyQuantityConstraint
+{ 
     TYPESYSTEM_HEADER();
 public:
-    PropertyAngle(void){}
+    PropertyAngle(void);
     virtual ~PropertyAngle(){}
     virtual const char* getEditorName(void) const { return "Gui::PropertyEditor::PropertyAngleItem"; }
 };
@@ -112,11 +150,11 @@ public:
  * This is a property for representing speed. It is basically a float
  * property. On the Gui it has a quantity like m/s or km/h.
  */
-class AppExport PropertySpeed: public PropertyFloat
+class AppExport PropertySpeed: public PropertyQuantity
 {
     TYPESYSTEM_HEADER();
 public:
-    PropertySpeed(void){}
+    PropertySpeed(void);
     virtual ~PropertySpeed(){}
     virtual const char* getEditorName(void) const { return "Gui::PropertyEditor::PropertyFloatItem"; }
 };
@@ -125,15 +163,41 @@ public:
  * This is a property for representing acceleration. It is basically a float
  * property. On the Gui it has a quantity like m/s^2.
  */
-class AppExport PropertyAcceleration: public PropertyFloat
+class AppExport PropertyAcceleration: public PropertyQuantity
 {
     TYPESYSTEM_HEADER();
 public:
-    PropertyAcceleration(void){}
+    PropertyAcceleration(void);
     virtual ~PropertyAcceleration(){}
     virtual const char* getEditorName(void) const { return "Gui::PropertyEditor::PropertyFloatItem"; }
 };
 
+/** Pressure property
+ * This is a property for representing acceleration. It is basically a float
+ * property. On the Gui it has a quantity like m/s^2.
+ */
+class AppExport PropertyPressure: public PropertyQuantity
+{
+    TYPESYSTEM_HEADER();
+public:
+    PropertyPressure(void);
+    virtual ~PropertyPressure(){}
+    virtual const char* getEditorName(void) const { return "Gui::PropertyEditor::PropertyFloatItem"; }
+};
+
+/** Force property
+ * This is a property for representing acceleration. It is basically a float
+ * property. On the Gui it has a quantity like m/s^2.
+ */
+class AppExport PropertyForce: public PropertyQuantity
+{
+    TYPESYSTEM_HEADER();
+public:
+    PropertyForce(void);
+    virtual ~PropertyForce(){}
+    virtual const char* getEditorName(void) const { return "Gui::PropertyEditor::PropertyFloatItem"; }
+};
+
 
 } // namespace App
 
diff --git a/src/Gui/propertyeditor/PropertyItem.cpp b/src/Gui/propertyeditor/PropertyItem.cpp
index f8cefb6caf..f17660755a 100644
--- a/src/Gui/propertyeditor/PropertyItem.cpp
+++ b/src/Gui/propertyeditor/PropertyItem.cpp
@@ -779,7 +779,7 @@ PropertyAngleItem::PropertyAngleItem()
 
 void PropertyAngleItem::setEditorData(QWidget *editor, const QVariant& data) const
 {
-    const App::PropertyFloatConstraint::Constraints* c = 0;
+    const App::PropertyQuantityConstraint::Constraints* c = 0;
     const std::vector<App::Property*>& items = getPropertyData();
     if (!items.empty()) {
         App::PropertyAngle* prop = static_cast<App::PropertyAngle*>(items[0]);
diff --git a/src/Mod/Part/App/FeaturePartCircle.cpp b/src/Mod/Part/App/FeaturePartCircle.cpp
index dc793909db..6b522dd763 100644
--- a/src/Mod/Part/App/FeaturePartCircle.cpp
+++ b/src/Mod/Part/App/FeaturePartCircle.cpp
@@ -34,7 +34,7 @@
 
 using namespace Part;
 
-App::PropertyFloatConstraint::Constraints Circle::angleRange = {0.0,360.0,1.0};
+App::PropertyQuantityConstraint::Constraints Circle::angleRange = {0.0,360.0,1.0};
 
 PROPERTY_SOURCE(Part::Circle, Part::Primitive)
 
diff --git a/src/Mod/Part/App/FeaturePartCircle.h b/src/Mod/Part/App/FeaturePartCircle.h
index 15dab6d75b..c8f5fe41a0 100644
--- a/src/Mod/Part/App/FeaturePartCircle.h
+++ b/src/Mod/Part/App/FeaturePartCircle.h
@@ -53,7 +53,7 @@ public:
     }
 
 private:
-    static App::PropertyFloatConstraint::Constraints angleRange;
+    static App::PropertyQuantityConstraint::Constraints angleRange;
     //@}
 };
 
diff --git a/src/Mod/Part/App/PrimitiveFeature.cpp b/src/Mod/Part/App/PrimitiveFeature.cpp
index 927a710309..d594b82df1 100644
--- a/src/Mod/Part/App/PrimitiveFeature.cpp
+++ b/src/Mod/Part/App/PrimitiveFeature.cpp
@@ -969,7 +969,7 @@ void Wedge::onChanged(const App::Property* prop)
     Part::Primitive::onChanged(prop);
 }
 
-App::PropertyFloatConstraint::Constraints Ellipse::angleRange = {0.0,360.0,1.0};
+App::PropertyQuantityConstraint::Constraints Ellipse::angleRange = {0.0,360.0,1.0};
 
 PROPERTY_SOURCE(Part::Ellipse, Part::Primitive)
 
diff --git a/src/Mod/Part/App/PrimitiveFeature.h b/src/Mod/Part/App/PrimitiveFeature.h
index 7dd6a35964..baef52df58 100644
--- a/src/Mod/Part/App/PrimitiveFeature.h
+++ b/src/Mod/Part/App/PrimitiveFeature.h
@@ -411,7 +411,7 @@ public:
     //@}
 
 private:
-    static App::PropertyFloatConstraint::Constraints angleRange;
+    static App::PropertyQuantityConstraint::Constraints angleRange;
 };
 
 } //namespace Part