Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations cowski on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Recent content by jszymkowski

  1. jszymkowski

    Example of drawing identifying cut plane for examination of internal porosity in an aluminum casting

    I need to identify a cut/section plane and measuring field/s in a technical drawing for the inspection of internal porosity of an aluminum casting (destructive examination). I've checked ISO, VDA, BDG, NADCA, etc., but none give an example of how this should be noted on technical drawings. Of...
  2. jszymkowski

    Positional tolerance of features in a circular array at tangency

    Thank you, everyone. Notes are probably the way to go here if there are no specific ISO or ASME descriptors that could describe this.
  3. jszymkowski

    Positional tolerance of features in a circular array at tangency

    Looking for some suggestions... I am having difficulty defining the positional tolerance of features in a circular array. In the attached illustration (first angle projection), the tangent point of each bump to the red diameter must lie in a tolerance zone defined by two cylinders 0.2 apart...
  4. jszymkowski

    Torque applied to a bolt for belt tension.

    Your mechanism may benefit from using a bolt manufactured by SmartBolt; it has a built in indicator that indicates when a specific tension has been applied to the bolt. I am not a representative of SmartBolt, but I have found some very useful applications for their product.
  5. jszymkowski

    Controlling Radius Size Within a Profile

    A controlled radius requirement would not prevent the condition I wish to avoid. It would, however, cause the heads of people in our Quality department to explode.
  6. jszymkowski

    Controlling Radius Size Within a Profile

    Wouldn't the application of a tighter tolerance profile around the corner radii result in a sudden step from the end of one profile at the tangency to the beginning of the next? Perhaps tangency is implied? The application of a tolerance to the radius in addition to the all-around profile...
  7. jszymkowski

    Controlling Radius Size Within a Profile

    What is the best way to control the size of a radius within the boundaries of a profile? In the attached sketch, the nominal line in blue is flanked by the min and max profile boundaries. An undesirable condition is shown in pink. What controls are best utilized to ensure that the corner radius...
  8. jszymkowski

    Dimensioning displaced state vs. free state of elastomer product

    The product of discussion is a rectangular silicone slab with sealing surfaces around the perimeter and inside thru-holes positioned about the interior. The part is installed in a housing whose mating surface perimeter is porportionally smaller than the part's perimeter. This produces some...
  9. jszymkowski

    Tan Plane

    E is missing because I only posted one view from the drawing. It is a feature of size defined by the 2 outside surfaces adjacent to datum J. The phantom line instead of 0.00 BASIC makes sense. Thank you. The objective was to control how high or low the surface identified by the profile of a...
  10. jszymkowski

    Tan Plane

    I had an application recently that required the Tangent modifier. In the drawing we want to control the lowest point of the terminal insulation crimp relative to datum J (box of the receptacle). This controls the "bend" of the crimped terminal in one direction. Since the form of the insulation...
  11. jszymkowski

    Referencing a Datum feature of size multiple times

    It occurs to me now that a plane has no center, therefore a note referencing a centerline or centerplane of datum A would also be incorrect. How about just "Datum plane A"?
  12. jszymkowski

    Referencing a Datum feature of size multiple times

    aardvarkdw, the key point is that the second view contains multiple features that an centerline could be associated with. ewh, I originally considered a "centerline", but although the line type used would be a centerline, the actual feature represented is a plane. It appears as a line because...
  13. jszymkowski

    Referencing a Datum feature of size multiple times

    I have a drawing with multiple pages. Datum A is defined as a feature of size on page 1. On page 2 we dimension another feature to the center plane of datum A. The center plane of datum A is represented by a centerline in this view, but because the centerline can be tied to multiple features...
  14. jszymkowski

    Bidirectional tol. vs 2 single segment feature control frames

    Can anyone explain the difference between controlling the position of an FOS with a bi-directional tolerance vs. a 2 single segment feature control frame (non-diametric)? Both indicate direction and magnitude relative to specific datums. What are the benefits of one method over the other?

Part and Inventory Search