AutoCAD

Model the split cylindrical housing bracket as a 3D solid

Software: AutoCAD
Platform: Windows
Length: 37 min
Resolution: 1920 × 1080
Output: DWG, DXF

Samples play on a computer

37min

360clicks

339keys

Windows

Task

Build a 3D solid model of a split cylindrical housing bracket. Work in millimetres at full size (1:1). The geometry is defined by the supplied dimensioned diagrams: diagram_01.png (front, top, right side and isometric views, third-angle projection) and its enlarged details diagram_01_detail01.png to diagram_01_detail04.png. Model only the part itself. Do not add 2D views, dimensions or text.

Geometry:

Head. Two parallel cylindrical bosses, each R18 (36 dia) on the outside. Their axes are horizontal and run front-to-back. Each boss has a 2X Ø18 through-hole on its axis.
Boss spacing. The overall width across the bosses is 96, which places the boss axes 60 apart.
Web. A web joins the bosses into a single link-shaped head. The top of the web is tangent to the tops of both bosses. Between the bosses there is a recessed channel, as shown in the front and isometric views.
Upright. A rectangular upright block hangs below the head. In the front view it spans between the two boss axes.
Overall size. The overall height from the base of the upright to the top of the bosses is 108. The overall front-to-back depth of the part is 37, as shown in the top view.
Groove. The rear face of the upright carries a rectangular groove that runs across the full width of the block. It appears as a stepped profile in the right side view.
Rib. A tapered rib on the front face of the upright supports the head. It is widest at the head and narrows to nothing at the base, as shown in the right side view.

Build the part from primitives and extruded profiles combined with Boolean union and subtraction. The finished part must be one united 3DSOLID.

CAD standards:

Layer M-SOLID (ACI 7, Continuous, 0.50 mm): holds the finished 3D solid.
Layer M-CONS (ACI 8, Continuous, 0.13 mm): holds the construction/reference lines used while modelling. Six construction LINEs remain on this layer.
All objects take colour, linetype and lineweight ByLayer.
Nothing is placed on layer 0.
No blocks, hatches, text or dimensions are required.

ReferenceSheet 1

Loading the drawing

Rubrics16

R1
The drawing shall contain exactly one 3DSOLID representing the complete bracket as a single united body.
R2
The solid shall include two parallel cylindrical bosses of R18 (36 dia) outer radius.
R3
The boss axes shall be 60 apart, giving an overall width across the bosses of 96.
R4
Each of the two bosses shall have an Ø18 through-hole on its axis.
R5
The two bosses shall be joined by a web forming a single link-shaped head with a recessed channel between the bosses.
R6
The solid shall include a rectangular upright block beneath the head.
R7
The overall height of the solid from the base of the upright to the top of the bosses shall be 108.
R8
The overall front-to-back depth of the solid shall be 37.
R9
The rear face of the upright shall carry a rectangular groove running across the width of the block.
R10
The solid shall include a tapered rib on the front of the upright that narrows towards the base.
R11
The drawing units shall be millimetres (INSUNITS = 4) and the model shall be at full size.
R12
The drawing shall contain layer M-SOLID with colour ACI 7, linetype Continuous and lineweight 0.50 mm.
R13
The drawing shall contain layer M-CONS with colour ACI 8, linetype Continuous and lineweight 0.13 mm.
R14
The 3DSOLID shall reside on layer M-SOLID.
R15
The six construction LINE entities shall reside on layer M-CONS.
R16
No drawing geometry shall be placed on layer 0.

Gold output28_3DMDWG, DXF

Drag to turn, then scroll to zoom

00:00 / 37:17

Events2,074

00:00.000Move516, 278 → 665, 341

00:00.124Move676, 346 → 712, 354

00:00.165Move738, 360 → 1029, 569

00:01.408Click1029, 569

00:01.500AppAutoCAD Application

00:12.100Move1026, 568 → 525, 437

00:12.602Click525, 437

00:12.806Move524, 438 → 508, 442

00:13.782Move508, 442 → 511, 442

00:13.827Move521, 442 → 544, 444

00:13.980Move548, 445 → 923, 472

00:14.510Move923, 473 → 918, 477

00:14.550Move916, 478 → 911, 482

00:14.590Move909, 484 → 859, 515

00:14.852Move859, 515 → 849, 496

00:14.908Move847, 492 → 1037, 88

00:17.158Click1038, 88

00:17.610Move1038, 89 → 1040, 244

00:18.864Click1040, 244

00:19.098Move1040, 241 → 1040, 232

00:19.131Move1040, 230 → 1036, 78

00:19.790Move1036, 75 → 1033, 60

00:19.990Click1033, 60

00:20.218Move1033, 60 → 1031, 64

00:20.834Move1031, 65 → 1036, 178

00:21.312Click1036, 178

00:21.600Move1036, 181 → 1021, 370

00:22.496ClickMiddle click 1021, 370

00:22.690Move1021, 371 → 387, 867

00:24.432Move387, 867 → 425, 826

00:24.584Move431, 821 → 788, 796

00:25.252ClickMiddle click 788, 796

00:25.340Move786, 793 → 248, 416

00:25.828Move243, 416 → 559, 398

00:33.736Move565, 367 → 593, 403

00:35.514Move593, 404 → 596, 436

00:42.981Move616, 441 → 621, 465

00:44.922Move620, 465 → 623, 441

00:46.037Move621, 439 → 56, 116

00:47.644Click56, 116

Loading events

Narration202

00:00
Switched to AutoCAD and displayed the Start page, then clicked Start Drawing.
Open a new AutoCAD drawing.
00:13
Opened Drawing9.dwg and adjusted the view controls, leaving the view-selection menu open.
Set up the drawing workspace and choose a viewing orientation.
00:18
Selected an isometric view and changed the visual style to Shaded with edges, then navigated the 3D viewport with middle-clicks.
Configure and inspect the 3D drawing view.
00:26
Remained idle while the AutoCAD viewport displayed the shaded isometric grid.
Pause or review the current drawing view.
00:46
Opened the Modeling primitives menu, selected Box, and began specifying the box's first corner and length in the viewport.
Create a box primitive in the drawing.
00:57
Continued the BOX command by entering a length and positioning the second point with Ortho enabled, leaving a long rectangular solid preview active.
Define the dimensions of the box primitive.
01:06
Entered 0 and repositioned/resized the AutoCAD window while continuing the box command; the rectangular base appeared in the drawing area.
Continue defining a 3D box in AutoCAD.
01:20
Entered 5 and confirmed it; AutoCAD advanced from the box width prompt to the height prompt, and the model became a short rectangular solid.
Set the box width and proceed to specify its height.
01:40
Entered 1 at the active AutoCAD prompt; the rectangular solid became tall and vertically elongated.
Specify the box height.
01:49
Entered 2, deleted the entry, then entered 90 and confirmed it; AutoCAD completed the box dimensions and displayed the finished tall solid.
Correct and finalize the box height value.
02:07
Scrolled and middle-clicked in the drawing area, changing the view scale/orientation so the completed solid appeared larger and more centered.
Inspect or adjust the view of the completed 3D box.
02:16
Paused on the completed tall rectangular solid, then entered L near the end of the interval.
Remain at the finished model and begin the next command.
02:32
Switched to AutoCAD and continued the active LINE command, positioning the cursor near the solid while entering the next value.
Continue drawing line geometry in the AutoCAD drawing.
02:39
Entered 2 and confirmed it, then moved the cursor to specify the next point for the LINE command with Ortho enabled.
Specify the next line segment distance or point.
02:43
Kept the LINE command active and repositioned the cursor around the solid, previewing an orthogonal segment without confirming the next point.
Position and preview the next segment of the line.
03:03
Entered 3 and confirmed it, then repositioned the cursor to preview another orthogonal line segment from the solid.
Add another specified point to the active line.
03:10
Entered 5 and confirmed it, extending the line preview toward the upper-right while leaving the LINE command awaiting another point.
Continue constructing the line with another point.
03:17
Entered 3 and confirmed it, then moved the cursor upward to preview a vertical orthogonal segment while keeping the LINE command active.
Continue the line construction with the next segment.
03:29
Entered numeric points while continuing a LINE command, then switched to the AutoCAD drawing window; the 3D solid remained visible with the line prompt active.
Continue defining geometry in the AutoCAD drawing.
03:36
Entered another numeric point, repositioned the AutoCAD window, and clicked near the upper-right edge of the solid twice; the line prompt advanced to the next point.
Continue placing line geometry on the solid.
03:44
Paused with the LINE command awaiting a point, then pressed Escape to cancel it; the command line returned to Type a command.
End the unfinished line operation.
03:51
Clicked the Presspull control twice, leaving AutoCAD in Presspull mode with a prompt to select an object or bounded area.
Start an extrusion or press-pull operation on the model.
04:01
Selected a bounded rectangular region on the solid and adjusted the press-pull operation through several clicks; AutoCAD created an extrusion and left Presspull active for another selection.
Modify the solid by extruding a selected bounded area.
04:11
Waited with the completed solid displayed in Presspull mode, then pressed Escape to exit the command and return to the command prompt.
Finish the solid modification and leave the modeling command.
04:26
Clicked modeling controls and resized the AutoCAD window; the existing shaded 3D solid remained visible.
Adjust the AutoCAD workspace or modeling-tool interface.
04:31
Waited while AutoCAD remained open with the shaded 3D solid visible and the CYLINDER command prompting for a center point.
Pause before continuing the active cylinder command.
04:51
Left the AutoCAD drawing unchanged while the CYLINDER command continued prompting for a base center point.
Continue or review the pending cylinder operation.
05:11
Clicked the middle mouse button in the drawing area while the CYLINDER command was awaiting a center point.
Interact with the 3D view or attempt to continue the pending cylinder operation.
05:27
Clicked the middle mouse button again and left the CYLINDER command active; the shaded solid remained unchanged.
Adjust the 3D view or continue the pending cylinder command.
05:47
Waited with AutoCAD idle; the shaded 3D solid and active CYLINDER center-point prompt remained on screen.
Pause while the cylinder command remains pending.
06:07
Remained inactive while AutoCAD displayed the existing 3D model and an active CYLINDER command prompt.
Waited or reviewed the current AutoCAD drawing.
06:27
Returned focus to AutoCAD and typed L while the CYLINDER command remained at the base-center prompt.
Attempted to enter a command or option in AutoCAD.
06:33
Entered a space and typed 3 while AutoCAD continued prompting for the CYLINDER base center; the view showed a point marker over the model.
Attempted to supply the cylinder command's base-center input.
06:38
Entered 0 and confirmed it, then typed Escape, L, and a space; AutoCAD advanced to the CYLINDER base-radius prompt and then returned to a line-related prompt.
Adjusted or canceled the active drawing-command input.
06:42
Activated the LINE command and left AutoCAD prompting for the first point, then typed 3 near the end of the span.
Started a line and began specifying its first point.
06:49
Entered 0 and confirmed it for the LINE first point, moved the window, and continued the line by typing 6; a white preview segment extended from the model toward the lower right.
Specified line coordinates and continued drawing the line.
06:56
Activated AutoCAD, entered 0 to continue the active line command, and then pressed Esc to cancel it.
Cancel the unfinished line operation.
07:06
Started the CYLINDER command, clicked a center point near the top of the existing model, and entered 1 as the next numeric input.
Create a cylinder on the model.
07:21
Entered 8 for the cylinder radius or diameter and proceeded through the height input, producing a horizontal cylindrical feature on top of the model.
Define the cylinder dimensions and complete the new solid feature.
07:28
Continued the CYLINDER command by entering 3 and positioning the axis endpoint, extending the cylinder horizontally to the right.
Set the cylinder height or axis endpoint.
07:44
Entered 6 and confirmed it, shortening the cylinder to the displayed final length.
Adjust or complete the cylinder's axis endpoint value.
07:48
Reopened the CYLINDER command and left it waiting for a center point after clicking near the upper-left interface area.
Begin another cylinder operation.
07:59
Clicked in the AutoCAD drawing, canceled the active cylinder command with Escape, and left the 3D bracket-and-cylinder model visible.
Cancel the unfinished cylinder operation and return to an idle drawing state.
08:04
Selected the cylinder and initiated the MOVE command, leaving AutoCAD prompting for a base point or displacement.
Begin repositioning the cylinder.
08:08
Clicked a point on the cylinder to define the move base point, then continued at the prompt for the second point or displacement.
Specify the reference point and destination for moving the selected cylinder.
08:28
Pressed Enter to accept the entered displacement value and updated the cylinder position on the bracket.
Complete the cylinder move using the specified displacement.
08:44
Clicked the navigation controls and dragged to orbit the 3D view, changing from the isometric view to a front-oriented view, then exited the navigation interaction.
Inspect the modified model from another viewpoint.
08:53
Clicked the cylinder to select it, entered a custom 3D view manipulation, and then pressed Escape and Undo to cancel the operation and restore the prior isometric view.
Adjust or inspect the cylinder orientation, then revert the attempted change.
09:11
Activated AutoCAD and continued the MOVE command on the selected cylinder, clicking and dragging near the cylinder to position it while the command prompt requested a displacement point.
Position the cylindrical solid in the 3D drawing.
09:20
Kept AutoCAD active with the MOVE command awaiting a displacement point, then entered a numeric value of 1; no completed placement was visibly confirmed.
Provide a displacement value for the active move operation.

09:35
Entered 8 and confirmed it, changed to a left-side view, dragged in the viewport, and then canceled the active operation; the model was shown as a vertical bracket with the cylinder above it.
Adjust the view and interactively position or inspect the 3D model.
09:53
Started MOVE, selected the upper cylindrical object, changed the view back to an isometric orientation, and dragged the cylinder away from the bracket; then entered L to begin a LINE command.
Separate or reposition the cylinder and begin creating a line.
10:08
Activated the LINE command and clicked near the upper edge of the bracket, establishing a first point and leaving the command prompting for the next point.
Draw a line between points in the 3D drawing.
10:13
Entered 8 and confirmed while LINE was active, then canceled the command with Escape; right-clicked in the drawing area afterward.
Complete or cancel the attempted line placement and return to the drawing.
10:27
Canceled the prior command, clicked in the drawing area, and began entering the M command while leaving the plate and cylinder visible.
Prepare a new AutoCAD modification command.
10:39
Activated AutoCAD and used MOVE on the cylinder; selected the object and began specifying a base point and displacement.
Move the cylinder relative to the plate.
10:50
Completed the MOVE operation by positioning the cylinder above and behind the plate, then returned to an idle command prompt.
Place the cylinder at the intended location beside the plate.
10:57
Selected and erased one object, then interacted with the 3D view and began a 3D orbit operation.
Remove an unwanted drawing element and inspect the model.
11:07
Dragged continuously to orbit the 3D view, changed to a more front-facing orientation, canceled the orbit, and started the MOVE command again.
Adjust the viewpoint and prepare to reposition the cylinder.
11:20
Activated AutoCAD, selected the cylinder for MOVE, and began specifying its displacement near the plate’s upper-right corner.
Move the cylinder into alignment with the plate.
11:28
Adjusted the AutoCAD 3D view with extended drag motions, selected the upper cylinder, and exited the active operation.
Manipulate and inspect the 3D model view.
11:46
Started MOVE, selected the upper cylinder, and dragged to specify a base point and second point while AutoCAD checked intersections.
Move the upper cylinder relative to the bracket.
11:56
Continued dragging to orbit the AutoCAD view, changing from the side view to top/front-oriented views that separated the cylinder and bracket visually.
Inspect the spatial relationship of the model components.
12:05
Dragged to orbit around the model, then exited the operation and initiated MOVE again.
Reorient the model and prepare another move operation.
12:20
Re-entered AutoCAD, kept the bracket and cylinder in view, and used MOVE on the cylinder to specify a base point before dragging it toward the bracket.
Position the cylinder beside the stepped bracket.
12:39
Clicked to complete the cylinder move, cancelled the remaining command, and issued multiple undo commands that restored the cylinder to a separated position.
Finalize or revert the recent cylinder placement.
12:50
Cancelled active commands with repeated Escape presses, resized the AutoCAD window, and clicked the cylindrical solid to select it.
Prepare the cylinder for modification.
13:04
Started the MOVE command, selected the cylindrical solid, and clicked to define a move point; the command remained active awaiting the second point.
Move the cylindrical solid relative to the plate.
13:15
Entered 1 as the MOVE displacement while the selected cylinder remained attached to the active command.
Specify the cylinder's movement displacement.
13:35
Entered 24 and confirmed the MOVE displacement, then cancelled the subsequent command; the cylinder moved away from the plate and was later shown positioned back against it.
Complete or adjust the cylinder placement.
13:42
Clicked the cylinder, started MOVE, and left the command at the base-point prompt with the cylinder selected.
Begin another repositioning of the cylinder.
13:46
Selected the cylinder's base point, entered 18, and confirmed the second point for the MOVE operation.
Apply an 18-unit movement to the cylinder.
13:53
Resized the AutoCAD window, then dragged across the viewport to orbit the 3D model into a more side-on view.
Adjust the 3D viewing angle for inspection.
14:02
Pressed Escape and Undo twice, then left the AutoCAD view unchanged while the window was moved or resized.
Cancel or reverse the preceding modeling operation and review the result.
14:12
Waited in AutoCAD with the 3D model displayed, then clicked the cylindrical component to select it.
Inspect and select the cylindrical component for editing.
14:32
Entered the MOVE command, selected the cylinder, and clicked to define a move displacement, previewing the cylinder shifted away from the bracket.
Move the cylindrical component relative to the bracket.
14:39
Confirmed the move, leaving the cylinder separated from the bracket, then started the LINE command and specified its first point.
Create a line from the bracket area toward the separated cylinder.
14:43
Entered 8 and confirmed it, clicked to place the next line point, then pressed Escape to end the line command; clicked again in the viewport afterward.
Specify the line geometry and finish the line operation.
14:54
Adjusted the 3D view by dragging, then exited the active operation and returned to the AutoCAD drawing.
Reorient the model view for inspection.
15:03
Activated the Line command and clicked in the drawing area to specify a first point, leaving the command ready for the next point.
Begin creating a line in the drawing.
15:08
Entered a line distance of 18, canceled the unfinished line, and selected the cylinder.
Attempt a line construction, then prepare the cylinder for editing.
15:16
Started Move, selected the cylinder, and dragged it toward the stepped solid, leaving the move operation active at a new position.
Position the cylinder above the stepped solid.
15:26
Continued dragging to place the cylinder on top of the stepped solid, then exited the active navigation or operation and changed to a top/front-oriented view.
Align the cylinder with the top of the solid.
15:41
Clicked the cylinder and resolved the overlapping-object Selection popup by keeping the 3D Solid selection active.
Select the cylinder for a subsequent operation.
15:46
Entered a copy displacement value and clicked to place a copied cylinder, leaving the COPY command active for another displacement.
Continue copying the cylinder along the model.
15:57
Entered a zero displacement and pressed Enter, then canceled the remaining COPY prompt and clicked the drawing tab area.
Finish the repeated copy operation without creating another offset copy.
16:11
Clicked in the drawing and began the CYLINDER command, specifying a center point and moving to the radius-or-diameter prompt.
Create another cylinder on the model.
16:23
Entered 18 for the cylinder diameter and pressed Enter.
Set the new cylinder's diameter.
16:27
Entered the cylinder height value and moved the cursor to position the endpoint above the right cylinder.
Define the new cylinder's height and placement.
16:34
Entered the axis endpoint value and completed the cylinder, then clicked to start another CYLINDER command and entered a diameter value.
Finish the elevated cylinder and begin creating another cylinder.
16:47
Switched to AutoCAD and continued entering the cylinder command, leaving the model visible while the base-radius prompt remained active.
Continue creating a cylinder in the AutoCAD model.
16:57
Entered 8 and confirmed it, setting the cylinder diameter; the preview updated to a vertical cylinder on the left side of the model.
Specify the cylinder diameter.
17:04
Moved the cursor around the model while specifying the cylinder axis endpoint, previewing a tall vertical cylinder above the left circular feature.
Define the cylinder's axis endpoint and height.
17:11
Entered 6 and confirmed it, completing the cylinder; then clicked and dragged in the viewport to begin orbiting the 3D model.
Set the cylinder height and inspect the completed model.
17:21
Dragged extensively in the viewport to orbit the model through multiple views, then clicked in the drawing area.
Rotate the 3D view to inspect the model from different angles.
17:33
Continued dragging to orbit the model, clicked in the viewport, and pressed Escape to exit the active 3D orbit mode.
Finish inspecting the model and return to normal command mode.
17:44
Clicked in AutoCAD and resized the application window, then began entering the BOX command with the 3D model visible.
Create a rectangular 3D box component in the drawing.
17:54
Continued the BOX command by entering the length option and positioning the first box dimension horizontally to the right of the model.
Specify the box length and placement.
18:02
Entered a length of 60 and confirmed it, then entered the width value 12 as the box preview expanded across the upper part of the model.
Define the box length and width.
18:09
Confirmed the width and continued the BOX command by specifying the height using the two-point option, leaving the box height prompt active.
Complete the box dimensions.

Build a 3D solid model of a split cylindrical housing bracket.

Create and refine a shaded 3D mechanical bracket in AutoCAD using boxes, cylinders, extrusions, Boolean operations, and positioning edits. Save it as “28 3DM,” generate and dimension projected drawing views in Layout1, then plot the layout to a PDF.