Creating Neck Collar - V1 - Lead Tube

Proven

Goal

To make a neck weight collar that fits comfortably around the neck and can be release quickly for safety.

Reference video

https://www.youtube.com/watch?v=4JpFWPSaKNs

Reference Images

Neck Collar Open	Neck Collar Closed

Time needed

Type	Hours
Implementation	0.25 h
Waiting	0 h

Bill of Materials

Material	Quantity	Unit Cost	Line Cost
Bike Inner Tube 26" Consumable	0.4 tube	£6.49 per tube 26in	£2.60
Loose Lead Consumable	3 kg	£8.50 per kg	£25.50
Quick Side Release Buckle 50mm Consumable	1 unit	£6.00 per buckle	£6.00
Electrical tape roll Consumable Wide PVC tape to join acrylic seams	1 roll	Inexpensive
Total			£34.10

Tools Required

Tool	Purpose
Scissors	Cut materials like fabric, film, or templates to size
Funnel	To channel the lead into the tube

Instructions (step-by-step)

Step 1 – Add the First Buckle

Cut one end of the bike inner tube and slide a buckle inside. Fold the tube back through the buckle and secure it tightly with electrical tape. This will form one end of the neck collar.

Step 2 – Fill with Lead Shots

Pour lead shots into the open end of the tube until you reach the target weight. Work slowly so the tube fills evenly and no air pockets remain. Make sure the tube stays soft and flexible when filled.

Step 3 – Check the Size

Getting the fit right is the most important part. Slide a second buckle onto the open end but do not tape it yet. Hold it closed and try the weight around your neck.

If it feels loose, remove a small amount of lead. If it feels tight, loosen the buckle until it sits comfortably.

Step 4 – Secure the Second Buckle

Once the size feels right, tape the second buckle securely. Wrap several tight turns of electrical tape so it will not slip.

Step 5 – Finish the Surface

Use more electrical tape to cover all joins and seams. Make sure the surface is smooth and nothing can rub against the skin. A clean finish helps the collar sit comfortably during dives.