Brackets and mounts
Spring Preload Test Bracket
- Bounding box
- 110.0 × 28.0 × 13.2 mm
- Engine
- Precision B-rep
- Parameters
- 17
- Published
- August 11, 2026
Download
Free to download and use. See the terms.
The prompt
Design a minimal flat test bracket for evaluating spring preload on a small bearing. Base: flat rectangular plate, 70 mm long, 20 mm wide, 4 mm thick. Static end: rigid circular boss, 28 mm diameter, at one end of the base. Central through-hole 8.2 mm diameter. Coaxial counterbore pocket on top face, 22.3 mm diameter, 7.2 mm deep, sized to hold a standard 608 bearing (8x22x7 mm) with a light press fit. Flexible end: cantilever flexure arm extending 18 mm from the opposite end of the base, 8 mm wide, 1.2 mm thick. At the free end of the arm, a small circular carriage boss, 16 mm diameter. Central through-hole 4.2 mm diameter. Coaxial counterbore pocket on top face, 13.3 mm diameter, 5.2 mm deep, sized to hold a small 624 bearing (4x13x5 mm) with a light press fit. Add 2 mm fillets where the flexure arm meets the base plate and where it meets the carriage boss, to reduce stress concentration. Keep flexure arm thickness and flexure arm length as separate adjustable parameters. No other features — keep the part as small and simple as possible for fast print iteration.
Parameters
| Name | Value | Range |
|---|---|---|
| Base Plate Length | 70 mm | 50 – 100 |
| Base Plate Width | 20 mm | 10 – 40 |
| Base Plate Thickness | 4 mm | 2 – 6 |
| Static Boss Diameter | 28 mm | 20 – 40 |
| Static Boss Height | 9.2 mm | 8.2 – 12 |
| Static Through Hole Diam. | 8.2 mm | 6 – 10 |
| Static Pocket Diam. | 22.3 mm | 20 – 25 |
| Static Pocket Depth | 7.2 mm | 6 – 9 |
| Flexure Arm Length | 18 mm | 10 – 30 |
| Flexure Arm Width | 8 mm | 4 – 12 |
| Flexure Arm Thickness | 1.2 mm | 0.5 – 2.5 |
| Fillet Radius | 0.5 mm | 0.1 – 1 |
| Carriage Boss Diam. | 16 mm | 12 – 20 |
| Carriage Boss Height | 7.2 mm | 6.2 – 10 |
| Carriage Through Hole Diam. | 4.2 mm | 3 – 6 |
| Carriage Pocket Diam. | 13.3 mm | 12 – 15 |
| Carriage Pocket Depth | 5.2 mm | 4 – 7 |
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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