Siemens NX

Model a motorcycle rear chain sprocket with lightening cutouts and hub boss

Software: Siemens NX
Platform: Windows
Length: 1 h 41 min
Resolution: 1920 × 1080
Output: PRT, STP

Samples play on a computer

101min

2Kclicks

553keys

Windows

Task

Model a motorcycle rear chain sprocket as a single solid part in millimetres. Then produce a dimensioned drawing of it, following the supplied dimensioned diagrams: diagram_01.png, diagram_01_detail01.png, diagram_01_detail02.png, diagram_01_detail03.png and diagram_01_detail04.png.

The sprocket is a flat toothed plate with a raised cylindrical hub boss at its centre. The boss stands proud on both faces of the plate.

Geometry:

Overall envelope: 272 mm across the front view horizontally and 271.63 mm vertically. The overall thickness across the hub boss is 40 mm.
Teeth: chain-roller teeth with rounded roots run around the full periphery.
Hub boss: outer radius R40, with a through bore of radius R30.
Bolt holes: five small round through-holes on a circle around the boss.
Lightening cutouts: five through-cutouts in the web, each roughly triangular and arranged in a swirl pattern. Their corners are rounded; the dimensioned corner radius is R9.5.
Locating dimensions in the front view:
- Horizontal chain: 90.97, 45.03, 74.44 and 61.56 (totalling 272).
- Vertical chain: 70.36, 65.45, 79.35 and 56.46 (totalling 271.63).

The finished part must be one closed solid body built from planar and cylindrical faces only.

Save the model as the part file SPROCKET_WHEEL.prt.

Create a separate drawing part, SPROCKET_WHEEL_dwg1.prt, that references the model. Use one A1 sheet in third-angle projection, with labelled views:

FRONT VIEW: carries the R40 and R9.5 radii and the Ø60 (R30) bore.
A side view: carries the 40 thickness dimension.
ISOMETRIC VIEW.

Fill in the title block with a title and a drawing number, and state that all dimensions are in millimetres.

ReferenceSheet 1

Loading the drawing

Rubrics15

R1
The model shall consist of a single solid body.
R2
The model shall have an overall extent of 272 mm by 271.63 mm in the sprocket plane.
R3
The model shall have an overall thickness of 40 mm measured across the hub boss.
R4
The model shall have a cylindrical hub boss of outer radius R40 projecting beyond both faces of the toothed plate.
R5
The model shall have a central through bore of radius R30 in the hub boss.
R6
The model shall have chain teeth with rounded roots around the full periphery of the plate.
R7
The model shall have five lightening through-cutouts in the web, with rounded corners dimensioned R9.5.
R8
The model shall have five round through-holes arranged around the hub boss.
R9
The model shall be built entirely from planar and cylindrical faces.
R10
The drawing shall contain labelled front, side and isometric views.
R11
The drawing shall dimension the front view with R40, R9.5 and the Ø60 (R30) bore.
R12
The drawing shall dimension the 40 overall thickness.
R13
The drawing shall have a title block with a title, a drawing number and size A1, and state that dimensions are in millimetres.
R14
The model shall be saved as part file SPROCKET_WHEEL.prt in millimetre units.
R15
The drawing shall be held in a separate part file SPROCKET_WHEEL_dwg1.prt whose views reference the SPROCKET_WHEEL model.

Gold outputSPROCKET_WHEELPRT, STP

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Drag to turn, then scroll to zoom

00:00 / 1:40:57

Events13,010

00:00.000AppNX 12

00:00.000Move72, 86 → 215, 344

00:01.115Move215, 344 → 211, 344

00:02.860Move212, 345 → 562, 247

00:04.050Click562, 247

00:04.197Move562, 247 → 1116, 810

00:05.384Click1116, 810

00:05.457Move1116, 810 → 1117, 810

00:05.481Move1118, 810 → 1005, 369

00:06.443Click1005, 369

00:06.755Move1002, 369 → 1625, 580

00:08.377Click1625, 580

00:08.450Move1625, 579 → 1625, 576

00:08.512Click1625, 576

00:08.690Move1625, 575 → 1531, 691

00:09.047Click1531, 691

00:09.133Move1528, 692 → 1614, 565

00:09.730Click1614, 565

00:09.879ClickDouble click 1614, 566

00:10.034Move1615, 566 → 1171, 726

00:10.870ScrollDown

00:10.875Move1171, 727 → 1170, 737

00:10.895ScrollDown

00:10.899Move1169, 737 → 1169, 740

00:10.923ScrollDown

00:10.931Move1168, 740 → 1166, 740

00:10.951ScrollDown

00:10.989ScrollDown

00:10.990Move1165, 740 → 1163, 732

00:11.194ScrollDown

00:11.198Move1163, 734 → 1162, 736

00:11.210ScrollDown

00:11.222ScrollDown

00:11.239ScrollDown

00:11.269ScrollDown

00:11.313Move1161, 738 → 1120, 814

00:13.364Click1120, 814

00:13.618Move1119, 813 → 1197, 817

00:14.258Click1197, 817

00:14.382ClickDouble click 1197, 817

Loading events

Narration621

00:00
Opened NX 12's New dialog, switched among template categories, and changed the selected template from a drawing to the Model template. Opened the directory chooser for the new part location.
Start a new NX modeling document and configure its template and save location.
00:05
Navigated the Choose Directory window through folders under Mechanical Components, including Sprocket Wheel, and left the directory chooser open after the folder search showed no matching items.
Select a directory for the new NX part.
00:15
Confirmed the directory selection, dismissed the information prompt, and opened model1.prt in NX 12 Modeling. Opened the File menu and navigated its options.
Finish creating the new part and begin configuring the modeling session.
00:32
Opened Sketch Preferences and navigated between Sketch Settings and Session Settings, reviewing sketch display, constraint, dimension, and task-environment options without a visible value change.
Review or configure sketching preferences before modeling.
00:40
Returned to the NX modeling workspace and switched to Windows Explorer.
Access files outside NX 12.
00:45
Opened the Sprocket Wheel.pdf file in Microsoft Edge and reviewed the one-page sprocket wheel technical drawing, then returned focus to Windows Explorer while the PDF remained visible.
Reference the sprocket wheel drawing and its dimensions for modeling.
01:03
Switched from Windows Explorer back to NX 12 Modeling and left the empty model workspace visible.
Return to the NX modeling workspace.
01:23
Activated Sketch in Task Environment, changing the NX window to Sketch mode.
Enter the sketch environment.
01:35
Opened the Create Sketch dialog, which displayed the On Plane sketch type and coordinate-system options.
Begin creating a sketch on a plane.
01:40
Returned to the modeling view, reopened Create Sketch, and interacted with the sketch setup controls; the interval ended with a dialog window active.
Configure or continue sketch creation.
01:45
Entered the sketch workspace and activated the Profile tool, leaving the line-creation tool ready for the first point.
Start drawing sketch profile geometry.
01:50
Selected the Circle tool, clicked and dragged in the sketch canvas to define a circle, and left the diameter field active for editing.
Create a circular sketch element.
02:10
Selected the circle’s diameter field, entered the expression 136*2, and confirmed it; then continued selecting the circle and moved to the next application state.
Set or update the circle diameter using an expression.
02:29
Selected the circle and dragged across the sketch, then clicked repeatedly to place or adjust the radial dimension; the Radial Dimension command became active.
Create or position a radial dimension for the sketch circle.
02:34
Edited the radial dimension value by entering 128*2 and confirming it, then clicked and dragged to specify the dimension’s origin location.
Update the radial dimension expression and position its annotation.
02:51
Scrolled and clicked Finish to leave Sketch, then waited while NX updated the model and switched to the Modeling environment.
Complete the sketch and return to solid modeling.
02:56
Opened the Extrude command, selected the circular sketch profile, adjusted the symmetric extrusion distance, and entered 10 mm; previewed the resulting thin cylindrical solid.
Extrude the circular sketch into a solid disk.
03:11
Confirmed the extrusion and rotated the resulting solid with right-button dragging, changing the view from an edge-on disk to an angled face view.
Inspect the completed extruded solid from different viewpoints.
03:19
Dragged repeatedly across the NX modeling viewport and middle-clicked to manipulate the view of the circular extruded part.
Adjust the model viewing orientation.
03:26
Middle-clicked and dragged in the viewport to rotate the circular extruded part about the X-Y axes.
Inspect the model from a different orientation.
03:41
Continued dragging to adjust the model orientation, then clicked near the upper toolbar area.
Finish inspecting the model and initiate the next modeling command.
03:56
Switched into the Sketch environment and opened the Create Sketch dialog, then selected a point to specify the sketch coordinate system.
Create a new sketch on the model.
04:02
Opened Profile and then Circle in the sketch environment, positioned the circle at the sketch center, and entered a diameter value beginning with 13 followed by Enter.
Create a constrained circular sketch profile.
04:17
Exited the Circle command and finished the sketch, then returned to Modeling and selected the resulting circular sketch geometry.
Commit the circular sketch and return to part modeling.
04:26
Switched to the NX 12 Sketch environment, opened Sketch (3) for editing, and adjusted the view while the sketch displayed a large circular profile.
Edit and inspect the active sketch geometry.
04:40
Activated the Circle tool and placed a concentric circle around the existing circular geometry, leaving the tool active for another circle.
Add concentric circular sketch geometry.
04:46
Opened Rapid Dimension with the radial method and selected circular geometry to prepare a radial constraint.
Add or edit a radial dimension for the sketch circles.
04:56
Selected the circular geometry and positioned the radial dimension, then entered 128 and confirmed the value.
Set the selected circle's radial dimension.
05:04
Completed the radial dimension placement, closed Rapid Dimension, and returned to the normal Sketch view.
Finish dimensioning and review the constrained sketch.
05:24
Remained in the NX 12 Sketch view with the concentric circles and R128 dimension visible, then clicked the upper toolbar area twice.
Review the completed sketch before continuing.
05:40
Activated the Arc tool, repositioned the NX window and view, and clicked in the sketch to begin defining an arc.
Create or edit an arc in the constrained sketch.
05:55
Switched among the sketch and Arc tool panels, adjusted the view, and clicked the sketch to continue positioning an arc.
Continue creating or editing the sketch arc.
06:13
Clicked points in the sketch while the Arc command was active, creating or positioning another arc segment.
Define the geometry of an arc in the sketch.
06:24
Adjusted the sketch view, then opened Rapid Dimension and left it waiting for the first object selection.
Prepare to dimension sketch geometry.
06:29
Selected sketch geometry in Rapid Dimension and entered 8 followed by Enter, adding an R8 radial dimension.
Apply a radial dimension to the selected arc.
06:34
Returned to the sketch, zoomed and panned the view, and dragged across the drawing area while repositioning the displayed R8 dimension.
Review or reposition the newly added sketch dimension.
06:44
Dragged across the sketch workspace, right-clicked, and scrolled while the fully constrained circular sketch remained visible.
Inspect or reposition the sketch view.
06:53
Scrolled repeatedly to zoom out and reveal the complete concentric-circle sketch and central reference geometry.
Adjust the view to inspect the full sketch.
07:03
Right-clicked and dragged in the sketch area, then scrolled repeatedly to change the view and inspect the circular dimensions.
Reposition and inspect the constrained sketch.
07:08
Paused with the fully constrained circular sketch displayed without recorded interaction.
Review the current sketch state.
07:28
Scrolled the sketch view, then clicked near the upper-left toolbar area and switched within NX 12.
Change the active NX tool or view.
07:33
Activated the Line tool, moved the NX window, and clicked in the sketch to begin positioning a line; dynamic inputs displayed length and angle values while the tool awaited the second point.
Create a line element in the sketch.
07:50
Selected the Line tool in NX Sketch and repositioned the sketch window while leaving the command ready for the first point.
Prepare to create a line in the sketch.
07:55
Switched to the Arc tool, adjusted the sketch view, and interacted with the circular geometry while positioning the arc command.
Prepare or begin creating an arc in the sketch.
08:11
Activated Rapid Dimension, adjusted the view, and right-dragged around the upper circular geometry before returning to the sketch.
Inspect or position sketch geometry and dimensions.
08:23
Activated the Arc tool, selected a start point and another point on the sketch, and moved the view while defining the arc; pressed Escape near the end.
Create an arc segment in the sketch.
08:35
Continued repositioning the NX sketch window while the Arc command remained active and awaiting the start point.
Maintain the sketch view and prepare for another arc selection.
08:55
Switched to the Line tool, positioned the sketch view, and selected a first point followed by a second point to define a line.
Create a line segment in the sketch.
08:59
Activated the Line tool and dragged in the sketch to create or adjust line geometry near the concentric arcs.
Add line geometry to the active sketch.
09:04
Opened Rapid Dimension, selected the first slanted line, and began selecting the second line for an angular measurement.
Apply an angular dimension between two sketch lines.

09:08
Completed the second-object selection, edited the angular dimension value, and entered 47.5 before confirming it.
Set the angle between the selected sketch lines to 47.5 degrees.
09:15
Exited the dimension dialog and dragged across the sketch view, repositioning the view while retaining the 47.5° dimension.
Reposition the sketch view to inspect the constrained geometry.
09:25
Continued dragging and repositioning the sketch view around the slanted lines and concentric arcs.
Adjust the viewport for continued sketch inspection.
09:35
Dragged across the sketch and selected geometry near the upper arc, leaving an orange-highlighted arc or constraint before continuing to adjust the view.
Inspect or select sketch geometry and constraints.
09:53
Opened the Rapid Dimension tool in NX Sketch, dragged across the sketch, and selected the first object; left the tool prompting for the second object.
Begin creating an angular rapid dimension between sketch objects.
09:58
Selected the second sketch object, positioned the dimension origin, and entered values in the on-canvas dimension field, producing an angular annotation of about 11.9°.
Create and adjust an angular constraint in the sketch.
10:07
Edited the on-canvas angular value through several numeric entries, pressed Enter, and left the dimension displayed at about 23.8° with the value field still available.
Set the angular dimension to the desired value.
10:18
Exited the Rapid Dimension panel, selected and dragged sketch geometry near the upper circular profile, and returned to the general sketch selection state.
Reposition sketch geometry after setting the angular dimension.
10:23
Reopened Rapid Dimension, selected the first upper sketch object, and left the tool prompting for the second object.
Start another angular dimension between the upper sketch elements.
10:27
Selected the second upper sketch object, entered 47.5 in the on-canvas field, and pressed Enter, creating a second angular annotation of about 45.1°.
Create and set the second angular constraint.
10:36
Switched to the NX Sketch window, zoomed the sketch view, and dragged across the arc geometry to reposition or adjust the view/selection.
Inspect or adjust the sketch arc geometry.
10:46
Reviewed the zoomed-out sketch, clicked near the lower sketch geometry, and selected the Arc tool from the ribbon.
Prepare to create or edit an arc in the sketch.
11:04
Activated the Arc command and clicked through the sketch to define the arc start and end points, leaving the command active with a radius input of 0.
Create an arc connecting existing sketch geometry.
11:09
Exited the Arc command and returned to the sketch, where the upper connecting geometry appears as a rounded arc between the slanted lines.
Complete or review the newly formed rounded top geometry.
11:13
Opened Geometric Constraints, selected constraint options, and clicked sketch geometry; the constraint panel progressed from one selected object to none while the sketch constraint count changed from 6 to 5 remaining.
Apply a geometric constraint to the sketch geometry.
11:18
Adjusted the sketch view with scrolling and dragged across the right-side line/arc region while the constraint tool remained active, then left the sketch visible with five constraints still needed.
Inspect or select geometry for further constraint application.
11:27
Opened the Geometric Constraints dialog, selected a sketch point, and left the command awaiting the second object.
Apply a geometric constraint to the sketch.
11:31
Selected another sketch element in the Geometric Constraints command, then resized and repositioned the NX window while leaving the constraint selection active.
Continue selecting geometry for a sketch constraint.
11:40
Dragged across the sketch view for an extended period, repositioning the visible sketch without completing the active command.
Adjust the sketch view or geometry position while working on constraints.
11:50
Continued dragging in the sketch view and clicked near the lower-right area, leaving the sketch displayed with the constraint count unchanged.
Navigate or reposition the sketch during constraint editing.
12:04
Opened the Rapid Dimension dialog, interacted with the measurement method menu, and left the command set to select the first object.
Create a dimensional constraint for the sketch.
12:08
Entered 5 and confirmed it in the Rapid Dimension value field, updating the visible radius annotation to R5 while keeping the command active.
Set the sketch feature's radial dimension to 5.
12:12
Selected and dragged the sketch arc/geometry in NX 12, repositioning the view and leaving the sketch under-constrained.
Adjust the sketch geometry or view while editing the profile.
12:22
Continued dragging and repositioning the sketch view, then clicked Rapid Dimension and left the circular profile displayed with its existing dimensions.
Inspect and prepare to add or modify a sketch dimension.
12:33
Opened the Rapid Dimension tool, selected the first-object area, and resized or repositioned the NX window while the tool prompted for the first and second objects.
Begin creating a rapid dimension between sketch elements.
12:39
Worked between the Rapid Dimension panel and sketch, selected a first object, entered 131.5, and confirmed it; a new 131.2 dimension appeared while the tool returned to object selection.
Create or edit a dimensional constraint for the sketch.
12:53
Closed or exited the Rapid Dimension interaction and scrolled repeatedly to zoom and reposition the sketch, leaving the curved profile and dimensions visible.
Review the updated sketch and dimension placement.
12:57
Scrolled repeatedly to zoom and adjust the sketch view, ending with the full circular profile, center reference, and dimension annotations more clearly visible.
Inspect the completed dimension placement and overall sketch geometry.
13:11
Dragged across the sketch geometry, then right-clicked and made minor view adjustments; switched focus to the Line tool near the end of the interval.
Manipulate and inspect the active sketch geometry.
13:29
Activated the Line tool and positioned the first and second points, previewing a line with length 45 and angle 242; resized or repositioned the NX window while continuing the operation.
Create a line segment in the active sketch.
13:37
Confirmed the line operation and selected the Arc tool, then began positioning arc geometry near the lower portion of the circular sketch.
Create additional sketch geometry using an arc.
13:41
Placed and adjusted an arc between the lower line segments, then repositioned the view and continued the arc command.
Add and position an arc in the sketch.
13:45
Opened Geometric Constraints and selected sketch geometry for constraint application, leaving one object selected and the command awaiting another selection.
Apply geometric constraints to the newly created sketch geometry.
13:50
Opened Rapid Dimension, selected geometry, and changed the measurement method from inferred to angular while continuing to choose the first and second objects.
Add a dimensional constraint to the sketch.
13:59
Select sketch geometry with Rapid Dimension and enter the angular value expression 47.5/2; update the displayed angular constraint to 28°.
Set an angular sketch constraint using a calculated half-angle.
14:09
Select the next sketch geometry, edit its angular dimension, enter 47.5, and confirm the value.
Set another angular constraint in the sketch.
14:20
Close or leave the current Rapid Dimension interaction, reopen it, and select sketch geometry for another dimension.
Prepare the next sketch constraint for editing.
14:28
Select the sketch feature, switch Rapid Dimension to Radial mode, and enter 5 to set the radius.
Set the radius of the small sketch arc.
14:35
Reposition the sketch view and select another object with Rapid Dimension, changing the measurement method to Inferred.
Prepare an inferred dimension for the next sketch element.
14:40
Select the first and second sketch objects, enter 131.5, and confirm the inferred dimension.
Set the spacing or positional constraint between the selected sketch objects.
14:55
Switched to the NX 12 Sketch window, adjusted the sketch view with scrolling, and dragged across the sketch geometry near the arc and angled lines.
Manipulate or inspect the sketch geometry in the NX sketcher.
15:00
Opened the Geometric Constraints panel, adjusted the view, and selected a constraint tool while leaving the panel in object-selection mode.
Prepare to apply a geometric constraint to the sketch.
15:05
Selected sketch geometry through the Geometric Constraints panel and dragged across the sketch; the panel progressed from one selected object to a second selection, and the sketch reduced from three needed constraints to two.
Apply a geometric constraint between selected sketch elements.
15:15
Dragged in the sketch area and clicked the geometry, then scrolled repeatedly to reposition and inspect the constrained arc and angled lines.
Review and adjust the sketch view after constraining geometry.
15:26
Scrolled to zoom or reposition the sketch, then clicked near the upper sketch toolbar.
Inspect the sketch and prepare another sketch command.
15:37
Opened the Line command, returned to the NX 12 Sketch window, dragged in the sketch area to create or position line geometry, and clicked to finish; the sketch decreased to one needed constraint.
Add or edit a line in the sketch while continuing to constrain the profile.
15:46
Switched to NX Sketch, moved and resized the window, and interacted with the Line tool to place a line segment in the sketch.
Create or continue sketch geometry.
15:51
Opened Rapid Dimension, selected the command, and interacted with the sketch geometry while leaving the tool awaiting object selection.
Prepare to add a dimensional constraint to sketch geometry.
16:07
Opened Geometric Constraints and left the constraint tool active after interacting with the sketch area.
Prepare to apply a geometric constraint between sketch objects.
16:13
Closed the constraint interaction, exited Sketch, and returned to NX Modeling with the ring-like model visible; selected items in the Part Navigator.
Finish sketch constraint work and continue in the modeling environment.

Model a motorcycle rear chain sprocket as a single solid part in millimetres.

Create a detailed sprocket wheel in Siemens NX 12 from a technical drawing, including sketches, extrusions, patterns, cuts, blends, material and mass properties, then produce and annotate an A1 drafting sheet with views, dimensions, centerlines, labels, and populated title-block metadata.