Tutorial OnShape Holes By: Matthew Jourden Brighton High School Brighton, MI

Holes Types:

Simple: Single drill Thru a part either all the way or part way

Counterbore: Two different diameter holes that are concentric used with bolts to pass thru.

- Large hole is drilled vertically to a depth to provide a flat surface for a bolt head to rest on. The large hole maybe drilled deep enough to hide the entire bolt head below the finished surface.

- Small hole will go thru the rest of the part for the shaft of the bolt to pass through and connect to a second part.

Countersink: Two different concentric holes used with machine screws. - Large hole is tapered from the face of the part down to the small. Depth of large hole is based on the angle of taper, which will be determined by the fastener being used. - Small Hole may pass through the part for the shaft of the screw to connect to a secondary piece

1. Navigate to onshape.com > Sign in 2. Start a New Document

3. Name the File: Holes Tutorial > Press Ok

Holes Tutorial

4. Design the following block

Height = 1

5. Counterbore Hole Two ways to create Counterbore holes. Create Both Holes on the part Option 1: Extrude Two Extrusion will be created. In the real world the large hole would have to be cut first so that surface will be left to find the center point of the small point to make the two holes concentric. On CAD software it does not matter which is cut first.

Large Hole a. Select Sketch > Select the Top Surface > Press n Key to rotate view > Rename Sketch: Large Hole > Select Circle > Draw the Circle and shown > Place Dimensions > Modify Values > Green Check to Accept

b. Select Sketch Large Hole from Model Tree > Select Extrude Icon > Rename Extrude: Large Hole > Select Remove Tab > Set Depth to .5 > Green Check to accept Extrude

Small Hole a. Select Sketch > Select the Top Surface or the bottom of the Large Hole does not matter > Press n Key to rotate view > Rename Sketch: Small Hole > Select Circle > Draw the Circle and shown > Place the cursor at the center of the Large Hole (This will make the holes concentric so if the counterbore hole needs to move then the user will just need to change the dimensions on Large Hole and the Small Hole will follow) > Wait until center point appears > Left Click > Draw Circle > Set Diameter .500 > Green Check to Accept

Wait for Center Point to Appear before drawing the circle for the small hole Concentric Circles Set Diameter to .5

b. Select Small Hole from Model Tree > Select Extrude Icon > Rename Extrude to Small Hole > Cut Through All > Green Check to Accept Extrude

Option 2: Hole Tool

a. Rotate to the top View (Select Top from the navigator or Shift + 5) > Select Hole Tool > Change the Name: CBORE > Change Hole Type to Counterbore > Set the Hole Dimensions as shown > Select Mate Connector > Select the Bottom Left corner of the part

1. Hole Type Counterbore 2. Set Sizes

3. Select Mate Connector

4. Select Bottom Left Corner

b. Select Mate Connector from the Sketch Points to place Holes > Change X and Y Coordinate to what is shown

Select Mate Connector

c. Green Check to Accept the Hole

6. Countersink Hole

Technically there is two ways to make a countersink hole. Using the Hole Tool and Revolve Tool. The hole tool is the typical way to create this type of hole. Using the revolve tools is much more difficult and will take up more time than it i s worth.

a. Select Hole Tool > Select Top Surface > Press n Key to rotate part > Change Name of Hole to Csink > Change Hole Type to Counter Sink > Change the Values as shown > Select the Mate Connector > Select the Bottom Left Corner of the Part

2. Hole Type Counterbo re 2. Set Sizes 4. Select Mate Connector

4. Select Bottom Left Corner

b. Select Mate Connector from the Sketch Points to place Holes > Change X and Y Coordinate to what is shown

Select Mate Connector

7. Layout a. Select + Sign at the bottom Left Corner of screen > Select Create Drawing > Show OnShape drawings Template > A-Size Title Block Landscape BHS

Select New > Create Drawing

b. Place Top View i. Scale 3:4 c. Place Center Points for the 3 Holes

d. Front View Full Section: Select the Section Tool > Select Horizontal Tab from the Section View Properties > Select one of the center points of the three holes > Drag Cursor down to place the front view Section Tool

Select Horizontal

Select Center Point of 1 of the 3 holes

Drag Cursor down to create the Front View

e. Place Centerlines using Edge to Edge Centerline Tool NOTE: Be sure to elongate the centerline to traverse the entire hole Centerline Tool

Drawing Should Look as Follows

8. Dimensions Holes need 3 Dimensions i. Leader Line: Diameter of Hole and Depth (if hole does not go thru all) ii. Two Locators: Measuring to the center of hole

b. Dimension Counterbore: Add the Dimension Shown. Notice the leader line arrow is pointing at the larger hole. This is important for clarity. The dimension should read

c. Dimension the middle Counterbore hole d. Dimension Countersink: Dimension is similar to Counterbore in terms of the order of info

e. Place the Locator Dimensions

Completed Drawing NOTE: Middle Hole Dimension Missing > Student should place

Submission Share Document to [email protected]