Heavy-Duty Gym Pulley for 6203 Bearing (1/2" Bolt Adapter)

This modular gym pulley is designed for maximum durability and smooth operation, utilizing a standard 6203 bearing (17mm ID x 40mm OD). This specific version includes a custom Inner Sleeve to adapt the bearing's 17mm bore to a standard 1/2" (12.7mm) bolt, ensuring a snug fit without mechanical slop.

Technical Specifications:

Bearing: 6203-2RS (17x40x12mm) – 6203 Bearing Dimension Guide.

Hardware Compatibility: Designed for 1/2-inch (12.7mm) bolts.

Design: 3-Part System (Main Pulley Body, Bearing Insert, 1/2" Adapter Sleeve).

What’s Included:

Main Pulley Body: Engineered with a deep groove to keep gym cables (up to 6mm/1/4") securely on track.

Bearing Insert: A press-fit housing that locks the 6203 bearing into the pulley core.

1/2" Inner Sleeve: This critical component bridges the gap between the 17mm bearing ID and your 1/2" bolt. It also acts as a spacer, allowing you to tighten the mounting bolt securely against the bearing's inner race without binding the pulley's rotation.

Printing Recommendations:

Material: PETG, ABS, or Nylon. (Avoid PLA as it can creep or shatter under the high-tension loads of a gym cable system).

Perimeters: 5–6 walls for maximum strength at the bearing and bolt interface.

Infill: 80–100% (Gyroid or Honeycomb) to handle heavy radial loads.

Orientation: Print the pulley flat on the bed for the best structural integrity of the cable groove.

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Assembly:

Clear any 3D printing burrs or "elephant's foot" from the central hole.

Press the 6203 bearing into the Main Pulley.

Slide the 1/2" Inner Sleeve through the bearing center.

Secure to your gym rack or cable station using a 1/2" bolt. Tighten the nut firmly; the sleeve ensures the bearing still spins freely.

Tags: Gym, Pulley, 6203, 1/2 Inch Bolt, Fitness, HomeGym, CableMachine, DIYGym.

Let me know if you need any specific tolerances added to the description (like a 0.2mm offset) to help other makers with different printer calibrations!

Gym_pully_6203_bearing

Arnaldo152535

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