Learning NX and building car jack

and what is your problem with 1-8? Although the draftie has made some poor choices it is all there, I think.

I have some issues

Click to expand...

What issues are you having? Is it because these are 3rd angle projection and not 1st angle projection?

GregLocock said:

and what is your problem with 1-8? Although the draftie has made some poor choices it is all there, I think.

Click to expand...

My problem is, I have already finished doing the one on the right, the screw base on the far right of the figure, what are the other 2 for? Where do I model them and where do I put them?

3DDave said:

What issues are you having? Is it because these are 3rd angle projection and not 1st angle projection?

Click to expand...

I don't know where to start for figure p1-9 and for p1-11 and p1-17, I am not able to see what dimension is for what. For example, what are those dotted lines inside the screw? And for p1-11 what is the 45 dimension? I just want to know how to start

Take P1-11 as a simple example.
There is a solid cylinder with 20 mm diameter and 45 mm length.
Inside the cylinder is a rectangular cutout that runs parallel to the axial center of the cylinder. It is 10 mm wide.
Note that there are two assumptions made:
1. the rectangle is actually square, which would mean the height of the cutout would also be 10 mm.
2. the interior corners of the "square" meet at right angles.
The first assumption is reasonable - the second is not, in terms of real-world manufacturing. Those corners would all have some small radius to them to limit stress concentrations, etc.

In the right-hand image for P1-11 the dashed lines (- - -) represent the flat internal surfaces of the cutout at "top" and "bottom". The center line (- . - . -) is the common axial centerline of both the cylinder and the cutout.

For P1-17, the two vertical dashed lines represent the nominal thread depth for the thread identified in the note at right (M12 x 1.75).

P1-8 is three orthogonal views of one part. I assume you are supposed to create a solid model of it.

Thank you for the replies. I am really having trouble with P1-9. Could someone please show me how it's done? And for P1-17, how do I do the chamfer at that angle?

The P1-17 image has two chamfers.
The one at the bottom of the bolt (0.75 x 45 deg) can be created using either a known intersection and an angle (0.75 from end of bolt for example), or by chamfering between two known intersections (each 0.75, since the angle is 45).
The one at the top on the head of the nut is a bit more challenging. The intersection is at the circle; the angle is known (30 deg).


Chamfers are usually defined by an angle and an intersection point but can be defined by two intersection points.

For P1-9 I would :
1. Create the cylinder (67 mm length by 54 MM diameter)
2. Add on the 45 x 45 x 33 mm rectangle at one end
3. Locate the correct position and add the two rectangular feet below the cylinder
4. Locate and remove material from the first rectangle to mimic the 20 mm diameter thru hole
5. Locate and remove material from the four 6 mm diameter hold down bolt holes in the feet
6. Apply the rounding to the ends of the casing and original rectangle as required (per note for geometry/radius)