Marine drain plug with internal led Light - CAD Model & Drawings
Budget: $30 – $250 USD
JOB TITLE:
Create FULLY DIMENSIONED SolidWorks / Fusion 360 CAD model + manufacturing drawings (marine drain plug light – precision assembly)
*Must be extremely accurate with no chance of leaks which could result in sinking the vessel.
---
IMPORTANT – READ FIRST
This is NOT a simple part.
This is a precision mechanical, thermal, and waterproof assembly.
If you do not understand:
- Press-fit tolerances
- O-ring sealing design
- Threaded retention systems
Do not apply.
---
PROJECT GOAL
Create a 100% manufacturable CAD model and drawing set for a high-performance underwater drain plug with enclosed very bright LED spotlight.
This must be:
- CNC machinable
- Properly toleranced
- Assembly-ready
- Physically accurate (no conceptual modeling)
---
REQUIRED DELIVERABLES
1. 3D CAD FILES
- SolidWorks (.SLDPRT + .SLDASM) OR Fusion 360 (.F3D)
- Fully parametric feature tree
- Clean modeling (no messy geometry)
---
2. EXPORT FILES
- STEP (.STEP)
- STL (.STL)
---
3. 2D DRAWINGS (CRITICAL)
- Section view (required)
- Top view
- Isometric view
- Exploded view
Must include:
- All dimensions
- Tolerances
- Thread callouts
- Press-fit callouts
---
FULL DESIGN SPECIFICATION
---
1. THREAD (MAIN BODY)
- 1/2”-14 NPT (drain plug)
- Correct taper required
---
2. LENS SYSTEM (CRITICAL)
Borosilicate Glass:
- Ø36.00 mm ±0.05
- Thickness: 3.0 mm
---
O-ring:
- Ø32 mm ID × 2.0 mm CS
- Material: Viton (FKM)
---
Groove:
- Diameter: Ø32.00 mm ±0.02
- Width: 2.20 mm ±0.05
- Depth: 1.50 mm ±0.05
---
Required:
- 15° chamfer on groove edge
- Width: 0.5–0.7 mm
This is mandatory to prevent O-ring damage.
---
Lens seat:
- Ø36.10 mm ±0.02
- Depth: 2.80 mm ±0.02
- Flatness: ≤ 0.02 mm
---
3. RETAINING RING
- Thread: M38 × 1.0
- Thickness: ~3.5 mm
- Include spanner notches (4x)
- Must control compression (no over-tightening)
---
4. LED SYSTEM (VERY IMPORTANT – DO NOT MISUNDERSTAND)
This is critical:
- LEDs are mounted directly ON the MCPCB
- There is NO separate LED layer
Correct stack:
Lens
→ Optics
→ LEDs (on MCPCB)
→ MCPCB
→ Thermal paste
→ Copper
---
MCPCB:
- Thickness: 1.6 mm
- Must sit flat on copper
---
5. OPTICS
- TIR lenses
- Height: 6–8 mm above MCPCB
---
6. THERMAL SYSTEM
Copper core:
- Ø32.02 mm × 7.0 mm
- Material: C110
---
Housing bore:
- Ø32.00 mm
---
Press-fit:
- Interference: 0.01–0.03 mm
---
Thermal interface:
- MCPCB sits directly on copper
- Thin thermal paste layer
---
7. HOUSING
- Material: Naval Bronze (C46400)
---
Cooling grooves:
- Depth: 0.75 mm
- Spacing: 1.5 mm
---
Internal cavity:
- Must allow wire routing and assembly access
---
8. CABLE EXIT
- Through-hole: Ø5 mm
- Must include strain relief area
- Must support cable gland interface
---
CRITICAL ENGINEERING RULES
- No adhesive sealing methods
- No floating or unsupported components
- All parts must physically contact where required
- Must be fully CNC machinable
---
BEFORE YOU START
Confirm understanding of:
1. LED is mounted directly on MCPCB
2. Copper core is behind MCPCB (thermal path)
3. O-ring seal is compression-based (not adhesive)
4. Press-fit tolerance is critical
---
If anything is unclear, ask before modeling.
---
BUDGET
$100–$250 depending on experience and turnaround
---
HOW TO APPLY
Include:
- Examples of similar machined/mechanical parts
- Experience with sealing systems or precision assemblies
- Software you will use
Create FULLY DIMENSIONED SolidWorks / Fusion 360 CAD model + manufacturing drawings (marine drain plug light – precision assembly)
*Must be extremely accurate with no chance of leaks which could result in sinking the vessel.
---
IMPORTANT – READ FIRST
This is NOT a simple part.
This is a precision mechanical, thermal, and waterproof assembly.
If you do not understand:
- Press-fit tolerances
- O-ring sealing design
- Threaded retention systems
Do not apply.
---
PROJECT GOAL
Create a 100% manufacturable CAD model and drawing set for a high-performance underwater drain plug with enclosed very bright LED spotlight.
This must be:
- CNC machinable
- Properly toleranced
- Assembly-ready
- Physically accurate (no conceptual modeling)
---
REQUIRED DELIVERABLES
1. 3D CAD FILES
- SolidWorks (.SLDPRT + .SLDASM) OR Fusion 360 (.F3D)
- Fully parametric feature tree
- Clean modeling (no messy geometry)
---
2. EXPORT FILES
- STEP (.STEP)
- STL (.STL)
---
3. 2D DRAWINGS (CRITICAL)
- Section view (required)
- Top view
- Isometric view
- Exploded view
Must include:
- All dimensions
- Tolerances
- Thread callouts
- Press-fit callouts
---
FULL DESIGN SPECIFICATION
---
1. THREAD (MAIN BODY)
- 1/2”-14 NPT (drain plug)
- Correct taper required
---
2. LENS SYSTEM (CRITICAL)
Borosilicate Glass:
- Ø36.00 mm ±0.05
- Thickness: 3.0 mm
---
O-ring:
- Ø32 mm ID × 2.0 mm CS
- Material: Viton (FKM)
---
Groove:
- Diameter: Ø32.00 mm ±0.02
- Width: 2.20 mm ±0.05
- Depth: 1.50 mm ±0.05
---
Required:
- 15° chamfer on groove edge
- Width: 0.5–0.7 mm
This is mandatory to prevent O-ring damage.
---
Lens seat:
- Ø36.10 mm ±0.02
- Depth: 2.80 mm ±0.02
- Flatness: ≤ 0.02 mm
---
3. RETAINING RING
- Thread: M38 × 1.0
- Thickness: ~3.5 mm
- Include spanner notches (4x)
- Must control compression (no over-tightening)
---
4. LED SYSTEM (VERY IMPORTANT – DO NOT MISUNDERSTAND)
This is critical:
- LEDs are mounted directly ON the MCPCB
- There is NO separate LED layer
Correct stack:
Lens
→ Optics
→ LEDs (on MCPCB)
→ MCPCB
→ Thermal paste
→ Copper
---
MCPCB:
- Thickness: 1.6 mm
- Must sit flat on copper
---
5. OPTICS
- TIR lenses
- Height: 6–8 mm above MCPCB
---
6. THERMAL SYSTEM
Copper core:
- Ø32.02 mm × 7.0 mm
- Material: C110
---
Housing bore:
- Ø32.00 mm
---
Press-fit:
- Interference: 0.01–0.03 mm
---
Thermal interface:
- MCPCB sits directly on copper
- Thin thermal paste layer
---
7. HOUSING
- Material: Naval Bronze (C46400)
---
Cooling grooves:
- Depth: 0.75 mm
- Spacing: 1.5 mm
---
Internal cavity:
- Must allow wire routing and assembly access
---
8. CABLE EXIT
- Through-hole: Ø5 mm
- Must include strain relief area
- Must support cable gland interface
---
CRITICAL ENGINEERING RULES
- No adhesive sealing methods
- No floating or unsupported components
- All parts must physically contact where required
- Must be fully CNC machinable
---
BEFORE YOU START
Confirm understanding of:
1. LED is mounted directly on MCPCB
2. Copper core is behind MCPCB (thermal path)
3. O-ring seal is compression-based (not adhesive)
4. Press-fit tolerance is critical
---
If anything is unclear, ask before modeling.
---
BUDGET
$100–$250 depending on experience and turnaround
---
HOW TO APPLY
Include:
- Examples of similar machined/mechanical parts
- Experience with sealing systems or precision assemblies
- Software you will use