Spindle Shoulders

fred_wild

A common lathe operation takes the stock from a square cross-section to a round cross-section.  The transition over a short distance leaves an arc on the flat face as the cut slopes into the stock.  My efforts to model the effect in Onshape using Revolve and Loft did not succeed.  Is there a method or Onshape tool useful in the purpose?  Thank you. 

NeilCooke

No loft required. Model it as you would machine it. Start with square stock then sketch the entire shape for the revolve (including the runout). 

fred_wild

Thank you for your response, but I don't understand.  If I extrude from the sketch to the square stock and revolve the adjacent transition, Onshape circumscribes it as a bead within the square butt. (See attached).  What am I doing wrong?  Thank you.

wayne_sauder

@fred_wild
Look at this for ideas.
https://cad.onshape.com/documents/f4bc8c9c3d0a00460977fcdc/w/89d493c72bc5b1b2bc070af0/e/6857b4795c9cac3a68b66017

eric_pesty

fred_wild said:

Thank you for your response, but I don't understand.  If I extrude from the sketch to the square stock and revolve the adjacent transition, Onshape circumscribes it as a bead within the square butt. (See attached).  What am I doing wrong?  Thank you.

Make the square part the whole length and use a revolve with "remove"