Brackets and mounts
B4 Centrifugal Clutch Assembly
- Bounding box
- 340.1 × 340.0 × 180.0 mm
- Engine
- Precision B-rep
- Parameters
- 39
- Published
- October 25, 2026
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The prompt
Create a 3D CAD assembly of a B4 centrifugal clutch. Units: mm. Use separate editable parts and show dimensions. DESIGN: 12 kW, 1000 rpm, engagement target 750 rpm, 4 shoes. 1. SHAFT: C45 steel, Ø30 mm hub seat, Ø25 mm bearing journals, keyway. 2. KEY: C45 steel, 10 x 8 x 45 mm. 3. HUB/SPIDER: C45 steel, Ø60 x 50 mm barrel, Ø80 x 10 mm flange, Ø30 mm bore, keyway, 4 radial T-bolt mounts. 4. SHOES: 4 curved C45 steel shoes, 60° each, inner radius R123 mm, outer radius R143.5 mm, width 90 mm. Cut a top pocket for the T-head, sliding bolt and spring. 5. LININGS: 4 separate non-asbestos friction pads, 5 mm thick, 90 mm wide, outer radius R148.5 mm. 6. T-BOLTS: 4 alloy-steel bolts, Ø12 mm smooth shank, T-head and threaded tail. 7. SPRINGS: 4 compact conical spring-steel compression springs, wire Ø7 mm, maximum OD about 41 mm, free length about 21 mm. Mark dimensions preliminary. 8. DRUM: cast iron or steel, ID Ø300 mm, OD Ø340 mm, width 95 mm. ASSEMBLY: Fix hub to shaft with key. Fix T-bolt tails to hub. Shoes must slide radially on bolt shanks. Springs sit in shoe top cuts and compress when shoes move outward. Arrange shoes at 90° intervals. Maintain 1.5 mm retracted drum clearance. OUTPUT: 3D assembly, separate parts, exploded view, dimensioned views, section through shoe pocket, materials and bill of materials. Export STEP if supported. Do not invent missing dimensions. Flag spring-fit conflicts and mark unverified dimensions TBD. Preliminary educational design only.
Parameters
| Name | Value | Range |
|---|---|---|
| Shaft Hub Seat Dia | 30 mm | 20 – 40 |
| Shaft Bearing Journal Dia | 25 mm | 15 – 35 |
| Shaft Total Length | 180 mm | 120 – 250 |
| Bearing Journal Length | 40 mm | 20 – 60 |
| Key Width | 10 mm | 6 – 12 |
| Key Height | 8 mm | 5 – 10 |
| Key Length | 45 mm | 25 – 60 |
| Shaft Keyway Depth | 5 mm | 3 – 6 |
| Hub Keyway Depth | 5 mm | 3 – 6 |
| Hub Barrel Dia | 60 mm | 40 – 80 |
| Hub Barrel Length | 50 mm | 30 – 70 |
| Hub Flange Dia | 80 mm | 60 – 110 |
| Hub Flange Thickness | 10 mm | 5 – 20 |
| Hub Bore Dia | 30 mm | 20 – 40 |
| Hub T-Bolt Hole Dia | 10 mm | 6 – 14 |
| Hub T-Bolt Hole Depth | 10 mm | 5 – 20 |
| Shoe Inner Radius | 123 mm | 100 – 140 |
| Shoe Outer Radius | 143.5 mm | 120 – 160 |
| Shoe Width | 90 mm | 50 – 120 |
| Shoe Arc Angle | 60 deg | 30 – 90 |
| Number of Shoes | 4 count | 2 – 8 |
| Shoe Pocket Dia | 41 mm | 30 – 50 |
| Shoe Pocket Depth | 12 mm | 5 – 20 |
| Shoe Shank Hole Dia | 12 mm | 8 – 16 |
| Lining Outer Radius | 148.5 mm | 130 – 165 |
| Lining Width | 90 mm | 50 – 120 |
| Lining Arc Angle | 60 deg | 30 – 90 |
| T-Bolt Tail Length | 10 mm | 5 – 20 |
| T-Bolt Tail Dia | 10 mm | 6 – 14 |
| T-Bolt Shank Length | 112.5 mm | 80 – 150 |
| T-Bolt Shank Dia | 12 mm | 8 – 16 |
| T-Bolt Head Side | 20 mm | 12 – 30 |
| T-Bolt Head Thickness | 10 mm | 5 – 20 |
| Spring Outer Dia | 41 mm | 30 – 50 |
| Spring Wire Dia | 7 mm | 3 – 10 |
| Spring Free Length | 21 mm | 12 – 35 |
| Drum Inner Dia | 300 mm | 250 – 350 |
| Drum Outer Dia | 340 mm | 280 – 400 |
| Drum Width | 95 mm | 60 – 130 |
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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