Stop Guessing Tube Fits - Quick Test card - Metric

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Stop Guessing Tube Fits

Your tube is not the CAD diameter.

This quick-print Tube Fit Test Card helps you check the real fit of your tube before printing caps, sleeves, hose connectors or custom fittings.

Choose one tube diameter, print the card, insert your real tube, and find the best clearance before printing the final part.

Included Test Fits

TIGHT
For a close fit with minimal clearance.

NORMAL
For a standard practical fit, usually the safest starting point.

LOOSE
For easier insertion, softer tubes or prints that tend to come out slightly tight.

Key Features

• Metric version
• One tube diameter at a time
• Minimal user parameters
• Fast print
• Very low material use
• No supports
• Flat print
• Engraved fit labels
• Real-world tube fitting test
• Helps avoid failed connector prints
• Useful before printing hose connectors, sleeve adapters, caps and custom workshop fittings

User Parameters

Tube Diameter
Select the outside diameter of the tube you want to test.

Available range: 4 mm to 50 mm in 0.5 mm steps.

Default Fit Offsets

TIGHT
Tube diameter + 0.10 mm

NORMAL
Tube diameter + 0.30 mm

LOOSE
Tube diameter + 0.50 mm

Recommended Materials

• PLA — quick fit checks and dry/light use
• PETG — general workshop use
• TPU — flexible tube testing and soft contact
• ASA / ABS — better heat and outdoor resistance

Part of the CiCAdesign Quick Tools series: small functional prints designed for real workshop problems.