Gears and transmission
Stepped Pulley Frame
- Bounding box
- 160.0 × 80.0 × 102.0 mm
- Engine
- Precision B-rep
- Parameters
- 16
- Published
- October 3, 2026
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The prompt
Create a fully constrained 3D CAD model and complete manufacturing documentation for a metal frame for stepped pulleys using the attached reference drawing as the sole dimensional source. Reproduce all geometry, features, and annotations exactly. Model requirements: two vertical supports joined by a horizontal base; circular top bores for shafts/bearings; two elongated mounting slots in the base; include all fillets, chamfers, radii (e.g., 2R, 3R, 8R) and any keyways, counterbores, countersinks, reliefs, and centerlines shown. Dimensions and fits: match all reference dimensions and spacing (including diameters/radii and fastener sizes such as 5/16 and 3/8). Apply machining tolerances and GD&T for critical datums; specify bore fits (e.g., H7/g6 or H7/p6) and positional tolerances for holes and slots. Material and finish: specify steel (suggested AISI 1045 or equivalent), required heat treatment if needed, corrosion protection, and surface finish targets (e.g., Ra values for bearing bores). Documentation and deliverables: provide a fully dimensioned 2D drawing set (front/top/side, isometric, sections, title block, revision, notes), a tolerance table and datum scheme, manufacturing notes for drilling/reaming/slot milling and thread callouts, a short QC checklist with inspection methods, and a parts list. Deliver a CAM-ready solid 3D model in common formats (native CAD, STEP, IGES) and 2D drawings (DWG, PDF). Document any assumptions made.
Parameters
| Name | Value | Range |
|---|---|---|
| Base Length (X) | 160 mm | 80 – 320 |
| Base Width (Y) | 80 mm | 40 – 200 |
| Base Thickness | 14 mm | 6 – 40 |
| Support Thickness | 14 mm | 6 – 40 |
| Support Height Above Base | 88 mm | 30 – 250 |
| Shaft / Bearing Bore Dia | 30 mm | 8 – 80 |
| Bore Centre Above Base Top | 44 mm | 15 – 200 |
| Keyway Width | 8 mm | 2 – 20 |
| Keyway Depth Over Bore Radius | 3.3 mm | 0.5 – 12 |
| Bore Entry Chamfer | 1 mm | 0.2 – 3 |
| Mounting Slot Width | 10 mm | 3 – 30 |
| Slot Centre-to-Centre Length | 30 mm | 0 – 120 |
| Slot Spacing (Across Base) | 84 mm | 20 – 250 |
| 8R Base / Support Fillet | 8 mm | 1 – 16 |
| 3R Vertical Corner Fillet | 3 mm | 0.5 – 8 |
| 2R Top Face Fillet | 2 mm | 0.5 – 6 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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