Model the V Block
The V block can be modelled with a single feature, consider some of the previous learning; the sketch for the block can be drawn utilising the sketch mirror tool with the origin at the vertical centre.
When extruding the block use the end condition "mid-plane"; this will give you a plane through the centre of the block - this might be useful at a later stage; when building the assembly for instance.
Model the Clamp
The Clamp could be modelled as a series of extrudes; but consider the previous learning. To keep the feature tree simple, aim to produce this model with the revolve feature. The hole for the tommy bar and cosmetic thread can be added after. The tommy bar is a seperate part, when this is modelled an extrude is fine but use the end condition "mid-plane"; this will be useful a the assembly stage.
Model the Clamp Bracket
This is descirbed on the next page. Things to consider include the position of the initial sketch so that the boss feature at the top of the bracket can be modelled easily. The part is completed with the hole wizard.
Assemble the V Block
The base part is the V Block, this could be fixed in place. the other parts assemble or mate to the Block.
Rather than mate the clamp bracket to the centre line of the model use a distance mate from one end. This will allow us to "use" the clamp at different positions with different components.
The V Block assembly complete; the Stepped Shaft could be added. To do this the part can be assembled or mated using 3 tangent mates. 1 mate between the cylinder of the stepped shaft and each face of the V, and 1 between the cylinder and teh end face of the clamp. To fully define the stepped shaft; mate the back face of the head to a face on the V Block and one face of the slot parallel to the bottom face of the V Block.