SOLIDWORKS

Model an oscillating wobbler steam engine assembly

Software: SOLIDWORKS
Platform: Windows
Length: 4 h 36 min
Resolution: 1920 × 1080
Output: SLDASM, SLDPRT, STEP, X_T

Samples play on a computer

4.6hours

5Kclicks

1Kkeys

Windows

Task

Model a miniature oscillating (wobbler) steam engine as an eight-part assembly, following the supplied dimensioned diagrams (diagram_01.png through diagram_09.png and their detail views). Model the parts in inches, matching the fractional-inch sizes on the sheets. The assembly is presented in millimetres. Overall envelope is about 67.64 x 43.66 mm in the top and front views.

Parts, one of each:

1. COLUMN: a revolved display column 66.67 mm (2.625 in) tall on a Ø34.92 mm (1.375 in) base ring. It has a 1.27 x 45° chamfer, upper and lower flats, small holes, a cross hole and a relief cut.

2. BEARING: a flanged sleeve bushing 17.46 mm (11/16 in) long. Flange Ø9.53 mm (3/8 in), shank Ø7.94 mm (5/16 in), through bore Ø4.76 mm (3/16 in), R0.005 in edge fillet.

3. CRANKSHAFT: a half-disc crank web of Ø17.46 mm, 3.97 mm thick, with a crank pin and a Ø4.76 mm (0.1875 in) x 31.75 mm (1.25 in) main shaft.

4. FLYWHEEL: Ø31.75 mm (1.25 in) x 7.94 mm (5/16 in) with a Ø4.76 mm bore. It has mirrored Ø22.23 mm (0.875 in) face recesses, mirrored Ø9.53 mm (0.375 in) hub bosses and a radial set-screw hole.

5. CYLINDER: an octagonal body 28.58 mm (1.125 in) long with a Ø9.53 mm bore, an end collar, recesses and an integral rod.

6. PISTON: a revolved piston head with an integral rod, ending in a 6.35 mm clevis block with a cross pin hole. Overall length along the rod axis is 38.1 mm.

7. WASHER: Ø0.406 in OD x Ø0.141 in ID x 0.045 in thick.

8. NUT: a hex nut 0.312 in (7.92 mm) across flats and 0.114 in thick, with a Ø1/8 in bore and a double-sided 30° corner chamfer.

Part modelling requirements:

Build each part from fully defined sketches.
Give sketches and features descriptive names.
Assign a steel material to every part.
Fill in the custom properties Description, PartNo and Material.

Assembly requirements:

Fix the column.
Locate all other components with concentric, coincident and tangent mates so that there are no mate errors.
Arrange the parts as shown in the isometric and right side views: bearing in the column, crankshaft through the bearing, flywheel on the shaft, and cylinder pivoting on the column with washer and nut.
Give the assembly the custom properties Description, PartNo and Material.

ReferenceSheet 1

1 of 9

Loading the drawing

Rubrics16

R1
The model shall be an assembly containing exactly eight resolved, unsuppressed components: column, bearing, crankshaft, flywheel, cylinder, piston, washer and nut.
R2
The model's column part shall be a revolved body 66.67 mm (2.625 in) tall with a Ø34.92 mm base ring and a 1.27 x 45° chamfer.
R3
The model's column shall include flats and cross-hole cut features.
R4
The model's bearing shall be a flanged bushing 17.46 mm long with a Ø9.53 mm flange, a Ø7.94 mm shank and a Ø4.76 mm through bore.
R5
The model's crankshaft shall have a half-disc web of Ø17.46 mm, a crank pin, and a main shaft of Ø4.76 mm x 31.75 mm.
R6
The model's flywheel shall be Ø31.75 mm x 7.94 mm with a Ø4.76 mm bore, mirrored Ø22.23 mm face recesses, mirrored Ø9.53 mm hub bosses and a radial set-screw hole.
R7
The model's cylinder shall have an octagonal body 28.58 mm long with a Ø9.53 mm bore and an integral rod.
R8
The model's piston shall have a revolved head and rod with a 6.35 mm clevis block containing a cross pin hole, 38.1 mm overall along the rod axis.
R9
The model's washer shall be Ø0.406 in OD x Ø0.141 in ID x 0.045 in thick.
R10
The model's nut shall be a hex 0.312 in (7.92 mm) across flats and 0.114 in thick, with a Ø1/8 in bore and a 30° corner chamfer on both sides.
R11
The model's assembled envelope shall be approximately 67.64 mm by 43.66 mm in the top/front view directions.
R12
The model shall have the column component fixed and all other components positioned by mates.
R13
The model shall use concentric, coincident and tangent mates, with no mate errors.
R14
The model's part features and sketches shall carry descriptive names, e.g. 'Flanged Bushing Body' and 'Main Shaft Ø0.1875'.
R15
The model's parts shall each have a steel material assigned.
R16
The model's parts and assembly shall each carry Description, PartNo and Material custom properties.

Gold outputAssem2SLDASM, STEP, X_T

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Events28,873

00:00.134AppSolidWorks

00:00.187Move182, 17 → 382, 267

00:00.528Move387, 268 → 408, 273

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00:01.295Click561, 374

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00:05.412Move1138, 543 → 1317, 336

00:06.293Move1317, 336 → 901, 496

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00:08.685Move955, 527 → 789, 429

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00:27.599Move877, 601 → 500, 505

00:29.295ScrollDown

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01:04.960Move258, 396 → 245, 434

01:08.608Move245, 434 → 751, 607

01:12.182Move750, 607 → 669, 646

01:13.206Move668, 646 → 845, 521

Loading events

Narration1,528

00:00
Opened SolidWorks, waited for the application to load, and created a new Part1 document; the window was resized and the document finished loading.
Initialize a new SolidWorks part document.
00:07
Remained idle in the empty Part1 modeling workspace with the FeatureManager tree visible.
Wait or review the new part document before modeling.
00:27
Scrolled briefly in the SolidWorks workspace, then remained on the empty Part1 model view.
Inspect or navigate the modeling workspace.
00:47
Remained idle in the empty Part1 modeling workspace with the default planes and Origin listed.
Wait or review the part setup.
01:07
Continued to leave the empty Part1 document open without interacting.
Keep the new part document available for further work.
01:27
Remained idle in the SolidWorks Part1 workspace; no modeling operation was performed.
Wait or review the current part document.
01:47
Remained inactive in SOLIDWORKS with the blank Part1 workspace visible.
Waited or reviewed the current part document.
02:07
Selected the Material entry and interacted with the graphics area, leaving a large outline highlighted in orange.
Selected or inspected an existing part-tree item and its associated geometry.
02:14
Entered Sketch1 editing on the Right Plane and selected the Right Plane feature, displaying its sketch plane and boundary.
Set up or inspect the sketch plane for drawing geometry.
02:24
Opened the sketch line-tool dropdown and selected the Line command while keeping Sketch1 active on the Right Plane.
Prepare to draw line geometry in the sketch.
02:35
Drew or edited construction-line geometry in Sketch1, resulting in a vertical dashed line through the sketch origin; the window was also briefly resized or refreshed.
Create and constrain reference geometry for the sketch.
02:55
Selected the sketch geometry and applied or reviewed a dimension, leaving a vertical dimension of 84.83 visible and the sketch fully defined.
Constrain the construction geometry with a dimensional value.
03:04
Selected text repeatedly in the SolidWorks Modify dialog for dimension D1@Sketch1 and left the value field active at 84.83106796 mm.
Prepare the sketch dimension value for editing.
03:14
Continued selecting the dimension value and clicking within the Modify field, then typed 2 before the Filter Quick Hits window appeared.
Edit the sketch dimension value.
03:27
Returned to the Modify dialog and entered additional characters, including a space, 5, slash, and 8, while the Filter Quick Hits window repeatedly appeared and hid.
Enter a fractional dimension value.
03:31
Entered the remaining fractional characters in the Modify field, producing 2 5/8, and pressed Enter.
Complete and submit the new sketch dimension.
03:38
Displayed the completed SolidWorks sketch after closing the Modify dialog, showing the selected vertical dimension updated to 66.675 mm.
Review the applied sketch dimension.
03:58
Clicked and dragged around the sketch and dimension annotations, then selected the upper-right geometry/dimension area; the view showed the 66.68 vertical dimension and a 34.99833 mm dimension.
Inspect or adjust sketch geometry and dimensions.
04:06
Selected the sketch dimension text in the Modify dialog and clicked within the dialog while leaving the value field open.
Edit the selected sketch dimension.
04:11
Confirmed and interacted with the selected sketch dimension, using clicks and drags around the sketch and dimension controls; left the sketch displaying dimensions 66.68 and 35.0.
Adjust or review the sketch dimension and its placement.
04:29
Entered the value 66.682 into the Modify dialog and pressed Enter, then clicked in the sketch area.
Set the sketch dimension to a new numeric value.
04:41
Scrolled within the SolidWorks workspace several times while reviewing the updated sketch dimensions.
Review the updated sketch geometry and dimension display.
04:49
Paused on the sketch, then clicked near the upper-left toolbar area.
Continue sketch editing or access a sketch tool.
05:04
Dragged across the sketch area to select geometry, then opened the Line tool dropdown and displayed options including Line, Centerline, and Midpoint Line.
Select sketch geometry and choose a line-based sketch tool.
05:14
Returned to SolidWorks Sketch1, interacted with the sketch line and dimension area, and left the horizontal dimension selected, displaying a measured length of 206.52.
Review and select the sketch dimension for editing.
05:31
Edited the selected dimension in the Modify dialog by entering a fractional value formatted as 25/8, leaving the dialog open.
Set the sketch dimension to a fractional value.
05:40
Completed the dimension entry and confirmed it; SolidWorks updated the horizontal sketch dimension to 66.68, then returned to sketch editing and selected the dimension tool.
Apply the new sketch dimension and continue editing the sketch.
05:55
Activated Insert Line, then exited the tool without visibly adding a new segment.
Prepare to add sketch geometry.
06:00
Activated Trim and interacted with the sketch; the original geometry was no longer visible, then selected a remaining construction line showing a length of 51.713655.
Trim or adjust existing sketch geometry.
06:14
Opened the Modify dialog for the selected dimension and entered 25/8, leaving the value unconfirmed.
Edit another sketch dimension using the same fractional value.
06:19
Edited the selected sketch dimension in the Modify dialog, entered a fractional value, and confirmed it; the displayed dimension changed to 66.68.
Set the sketch dimension to a specified value.
06:26
Activated the Insert Line tool, leaving the existing 66.68-dimensioned sketch visible, then exited the tool.
Prepare to add sketch geometry.
06:41
Drew a vertical sketch line near the origin and completed it; the resulting line was shown with a 94.70 length dimension.
Add vertical sketch geometry with a measured length.
07:00
Opened the line dimension's Modify dialog, replaced the value with 2 5/8, and confirmed the entry.
Set the vertical line dimension to a specified fractional value.
07:08
Reviewed the updated sketch and selected the dimensioned line; the displayed vertical dimension was 66.68.
Inspect the resulting sketch dimension.
07:25
Activated the line tool and drew a short horizontal segment from the top of the vertical sketch line, leaving the new segment selected with a horizontal relation.
Continue constructing the sketch profile.
07:35
Selected and manipulated sketch geometry near the lower endpoint, leaving a diagonal line visible and maintaining the 66.68 dimension.
Adjust the sketch geometry and its constraints.
07:44
Exited the active sketch tool, selected the upper horizontal geometry, and positioned a horizontal dimension that displayed 20.73.
Add or inspect a horizontal sketch dimension.
07:54
Selected the dimension value, typed a fractional value beginning with 5/8 and a quote mark, then clicked away from the edit area.
Change the selected sketch dimension to an imperial fractional value.
08:11
Reopened the Modify dialog for the selected dimension, entered 5/8 followed by a quote mark, and pressed Enter to apply the value.
Set the sketch dimension using an imperial fraction.
08:15
Reviewed the applied dimension and clicked the dimension/property controls; the displayed horizontal value changed from 41.46 to 15.88.
Inspect or adjust the selected dimension's display/value.
08:25
Selected sketch edges and dimension locations, then placed or inspected additional dimensions; the view showed 15.88 at the top and 20.73 across the profile.
Add or review dimensional constraints on the sketch.
08:36
Edited the selected Sketch1 dimension in the Modify dialog by entering a fractional value using typed characters, then confirmed with Enter.
Set a sketch dimension to a calculated fractional value.
08:41
Reviewed the updated sketch dimension, zoomed the sketch view out, and clicked around the dimension area while leaving the sketch visible.
Inspect the updated sketch geometry and dimensions.
08:59
Opened the Modify dialog for another sketch dimension, selected its value, and began entering a new value with the digit 5.
Edit a second sketch dimension.
09:06
Completed the fractional dimension entry with additional typed characters and confirmed it with Enter, then selected and dragged within the sketch view to inspect the resulting geometry.
Apply the new value to the second sketch dimension and inspect the result.
09:16
Selected sketch points and reviewed the Point properties while repeatedly zooming and panning the sketch, ending with a close view of the constrained profile.
Inspect point coordinates and the overall sketch layout.
09:30
Dragged across the sketch area and clicked to select geometry, leaving the sketch zoomed in with a vertical element highlighted and a visible 7.54 dimension.
Select and inspect another sketch element and its dimension.
09:48
Edited the selected Sketch1 dimension in the Modify dialog, entered the fractional value 5/16, and confirmed it.
Set the selected sketch dimension to a fractional measurement.
09:54
Returned to the sketch and clicked around the lower geometry and dimension area, leaving the updated sketch visible with the 46.63 dimension shown.
Review the sketch after applying the dimension change.

10:10
Edited the selected D6@Sketch1 dimension, entered the fractional value 3/8, and confirmed the entry.
Set another sketch dimension to a fractional measurement.
10:14
Reviewed the updated sketch and clicked the selected dimension area, leaving D6@Sketch1 displayed as 9.525 mm.
Verify the applied dimension value.
10:24
Activated the Insert Line tool, scrolled the sketch view, and dragged near the lower-right geometry while keeping the line tool active.
Prepare or adjust sketch line geometry.
10:34
Selected and manipulated sketch geometry, scrolled and repositioned the view, then left a line selected with its properties visible; the resulting view showed an 18.22 dimension on the upper segment.
Inspect or adjust the sketch line geometry and its dimensions.
10:49
Entered a dimension value in the SolidWorks Modify dialog and confirmed it, then selected geometry in Sketch1 for further dimension editing.
Modify a sketch dimension and continue constraining the profile.
11:05
Entered and confirmed another value in the Modify dialog for dimension D8@Sketch1, then selected the resulting 6.35 mm dimension.
Update a sketch dimension and inspect the changed constraint.
11:20
Responded to the Make Dimension Driven prompt and selected sketch geometry, leaving a 33.34 mm vertical dimension displayed.
Resolve a dimension-definition conflict while constraining the sketch.
11:32
Selected a sketch point and adjusted its position, changing the sketch status to under-defined and displaying the point parameters.
Refine the profile geometry and its constraints.
11:42
Selected the central vertical sketch segment, then pressed Escape to clear the selection and returned to the unselected sketch view.
Inspect a sketch segment without applying a further edit.
11:58
Scrolled and zoomed the sketch view, then selected the central vertical line segment for inspection.
Navigate the sketch and inspect the vertical profile segment.
12:18
Activated SolidWorks Sketch1 and selected the Insert Line tool, leaving the constrained profile visible while preparing to add sketch geometry.
Continue editing the under-defined sketch.
12:29
Exited the active line command with Esc, then selected the separate vertical line on the right side of the sketch.
Inspect or edit the added sketch line.
12:39
Selected the line tool again and clicked sketch geometry, leaving Line Properties open with a line selected and a horizontal relation shown.
Create or adjust line geometry and its relation.
12:49
Selected sketch edges and attempted to apply or edit a dimension; SolidWorks opened a Make Dimension Driven confirmation dialog after the dimension interaction.
Add a driving or reference dimension to the sketch.
13:06
Selected the right-side vertical line and nearby geometry, then clicked the dimension area and selected a point, leaving the sketch with the message that it was no longer over-defined.
Resolve sketch constraints and prepare a dimension edit.
13:14
Opened the Modify dialog for dimension D9@Sketch1, selected the existing 33.3375 mm value, and began replacing it by typing 1.
Change the selected sketch dimension.
13:19
Opened the SolidWorks Modify dialog for a sketch dimension, entered a value, and confirmed it; displayed the updated 25.40 mm dimension on the sketch.
Update a sketch dimension.
13:39
Selected the dimension labeled D9@Sketch1 and clicked within the sketch to continue dimension selection.
Select a sketch dimension or geometry for further editing.
13:50
Selected sketch geometry and initiated a dimension operation, resulting in a vertical 33.34 mm dimension being shown and the corresponding line highlighted.
Add or inspect a dimensional constraint on the sketch.
14:02
Accepted the Make Dimension Driven prompt, then zoomed or scrolled the sketch view; the new dimension remained displayed and the sketch was reported as no longer over defined.
Resolve an over-definition by making the dimension driven.
14:18
Scrolled and adjusted the sketch view, then selected geometry and began another dimension operation; the sketch remained no longer over defined.
Position and select sketch geometry for another constraint.
14:33
Accepted another Make Dimension Driven prompt and scrolled the sketch view; the sketch remained no longer over defined with the existing dimensions visible.
Resolve another potentially conflicting dimension as driven.
14:42
Selected and reviewed sketch geometry and dimensions, clicking and scrolling around the profile while editing Sketch1.
Inspect or select sketch entities and dimensions.
14:53
Selected the vertical sketch segment and then the lower stepped segment, displaying their relations and parameter values in Line Properties.
Inspect geometric relations and dimensions on sketch segments.
15:02
Selected sketch edges and dimension annotations, including the lower step, and reviewed the resulting line properties and dimension selection state.
Review or prepare sketch dimensions for editing.
15:10
Zoomed and scrolled the sketch, then selected geometry and a dimension annotation near the upper and central profile; the view ended with selected sketch entities and a dimension-placement prompt.
Inspect and select dimensions on the sketch.
15:24
Handled the “Make Dimension Driven?” prompt and accepted the driven-dimension option, returning to the sketch; the status then indicated that the sketch was no longer over defined.
Resolve an over-definition warning while adding a sketch dimension.
15:41
Opened the Modify dialog for dimension D1@Sketch1 and entered 1 into its value field, leaving the dialog open.
Edit the selected sketch dimension value.
15:49
Adjusted the SolidWorks sketch view with scrolling and drag gestures, then clicked around the dimensioned profile.
Inspect or reposition the sketch geometry and dimensions.
15:57
Selected sketch points or geometry and repositioned the view with clicks, drags, and scrolling; left a point selected near the vertical construction line.
Inspect and select sketch geometry for dimensioning or editing.
16:07
Selected a sketch dimension and opened its Modify dialog, preparing to edit the displayed value.
Change a sketch dimension value.
16:12
Edited the dimension field by entering and correcting a fractional value, then pressed Enter to apply it.
Set the selected sketch dimension to a precise value.
16:17
Adjusted the sketch view with scrolling and drag gestures, then selected a point on the lower vertical geometry.
Review the updated sketch and select lower geometry.
16:28
Continued dragging within the sketch area, clicked to change selection, and scrolled the view; ended with the sketch displayed without an active selection panel.
Inspect the finalized sketch geometry and dimensions.
16:38
Clicked through SolidWorks controls and returned to the Sketch1 window, leaving the dimensioned sketch visible with the lower vertical segment selected.
Return to the sketch and select geometry for further editing.
16:54
Edited the selected dimension in the Modify dialog by entering `1/2` and then submitted the entry.
Change the selected sketch dimension value.
16:58
Selected the sketch dimension, then clicked and dragged in the sketch area; the view changed to show the updated dimension placement before brief scrolling.
Inspect or reposition the sketch dimension.
17:06
Activated Insert Line and clicked in the lower sketch area to begin or place a line segment, leaving Line Properties active with the new segment selected.
Add line geometry to the sketch.
17:17
Continued drawing the lower sketch geometry by clicking and dragging to create a horizontal segment connected to the existing vertical line, then selected the resulting line.
Extend the sketch profile with connected line geometry.
17:27
Scrolled the sketch view while keeping the line tool active and the lower geometry selected; the dimensioned profile remained visible at a smaller scale.
Adjust the sketch view while continuing line editing.
17:36
Opened the sketch context menu on the lower sketch geometry, then selected the Arc tool and positioned it for drawing.
Continue constructing the sketch profile with curved geometry.
17:46
Zoomed and placed arc endpoints around the lower profile, creating a quarter-round arc connected to the existing blue linework.
Add a rounded transition to the lower portion of the sketch.
17:54
Completed the lower arc and selected the Line tool, leaving the new curved segment attached to the existing profile.
Extend the sketch profile after creating the first curved segment.
18:04
Placed and adjusted another arc from the lower endpoint, forming a larger outward-curving transition beneath the first arc.
Continue shaping the lower contour of the sketch.
18:14
Selected the new arc and then activated the Line tool, positioning the next line start near the lower curve.
Continue extending the profile from the newly created curved segment.
18:24
Added and adjusted another curved segment below the existing arcs, producing an S-shaped lower contour and leaving the latest arc selected.
Complete the next curved portion of the sketch profile.
18:35
Adjusted the lower sketch geometry with several clicks and drags, leaving the blue curved profile and its dimensions visible in Sketch1.
Refine the sketch profile geometry.
18:45
Opened a context menu on the sketch, selected or manipulated sketch entities, zoomed the view, and exited the active sketch editing panel while keeping the profile visible.
Inspect and modify sketch entities.
18:55
Zoomed and repositioned the sketch, then dragged the lower geometry and selected a sketch element, leaving a vertical construction/reference line visible beside the profile.
Adjust the sketch layout and geometry.
19:02
Dragged a sketch point repeatedly to reposition the lower curved portion of the profile, changing its shape and endpoint placement.
Refine the lower profile by moving a control point.

Model a miniature oscillating (wobbler) steam engine as an eight-part assembly, following the supplied dimensioned diagrams (diagram_01.png through diagram_09.png and their detail views).

Create and refine multiple SolidWorks parts, apply features and appearances, save/export them with component names, then assemble the components into a mechanical engine-like assembly with mates and a rotary motion study.