| name | mechanical-parts |
| description | Create mechanical parts — threads, fasteners, bearings, sprockets, flanges, pipes, and OpenBuilds linear motion parts using bd_warehouse. |
Mechanical Parts Design
Help the user create precise mechanical parts using the bd_warehouse parametric library tools.
Available Tools
| Tool | Use Case |
|---|
create_thread | Threaded shafts, nut bores, bottle threads, lead screws |
create_fastener | Screws, nuts, washers, heat-set inserts (14 types) |
create_bearing | Ball bearings, roller bearings (5 types) |
create_sprocket | Chain sprockets (ANSI #25–#80) |
create_flange | ASME B16.5 pipe flanges (5 types) |
create_pipe | Simple pipe/tube sections |
create_openbuilds_part | V-Slot rails, C-Beam rails, lead screws |
Workflow
- Clarify the user's mechanical requirements — thread size, fastener type, tolerances
- Select the appropriate tool and parameters
- Call the tool to generate the part
- Call
measure_model to verify dimensions
- Call
analyze_printability to check FDM suitability
- Use
combine_models to integrate with other parts if needed
Thread Selection Guide
- ISO threads (
thread_type="iso"): Standard metric bolts/nuts. Specify major_diameter and pitch.
- ACME threads (
thread_type="acme"): Power screws, vises, lead screws. Specify size (e.g. "3/8").
- Metric Trapezoidal (
thread_type="metric_trapezoidal"): Metric lead screws. Specify size (e.g. "10x2").
- Plastic Bottle (
thread_type="plastic_bottle"): ASTM D2911 bottle caps. Specify size (e.g. "L38SP400"). Use manufacturing_compensation=0.2 for FDM.
Fastener Quick Reference
Common sizes: M2, M2.5, M3, M4, M5, M6, M8, M10. Format: "M3-0.5" (diameter-pitch).
simple=True (default): Fast generation without thread detail — good for fit-checks and assembliessimple=False: Full thread geometry — use for final prints or when thread detail matters
FDM Printing Tips
- Threads: Use
manufacturing_compensation=0.2 for better FDM fit on bottle threads
- Fasteners: Generate with
simple=True for assembly visualization, simple=False for printable threads
- Bearings: These are reference models — print housings around them using
combine_models subtract
- Set
external=False for female/internal threads (nut bores, threaded holes)
