Rio GymPin (dropset pin)

Rio GymPin – For Smarter Training

The GymPin is a clever, self-developed tool that makes your workout routine smarter: It replaces the standard weight pin at your gym machine and automatically pops out after you finish a set. This lets you immediately continue with the next lighter weight – perfect for drop sets or fatigue-based training.

🛠️ Assembly Instructions

Printing:

• Print Plate 1: All parts can be printed in one go
• Print Plate 2: Optional ring made of TPU – for better grip, but not strictly necessary

Assembly:

• Prepare the steel rod (10 mm diameter, 10.5 cm length, groove at 4 mm from the end and 2 mm deep, V-shaped) and insert it into the sled from the top – the groove should fit precisely.
• Hold the spring from the back between the small holes and fix it in place using the 2 mm pin from the side.
• Cap (with screw lock):
  • Without TPU ring: Insert the spring from the front almost completely, then fix it with the 3 mm pin from the side.
  • With TPU ring: First push the spring through the ring, then proceed as above.
• Insert sled and cap into the main body and screw it in – make sure the steel rod rotates with it to avoid damaging the spring.
• Equip the lever with the torsion spring (one arm into the lever, the other into the intended spot in the main body) – a bit tricky, but doable.
• Insert the 3 mm pin from the side through the main body, the lever, and the spring, until it becomes visible on the opposite side.

✅ Done!

Your GymPin is now ready to use – enjoy your training!
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These designs are not meant for commercial use.
Want to sell the models commercially? Please contact me first.