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Fisheye Ball Bearing Rod Ends – M3 M4 Female Thread for 3D Printer Parts

My order arrived quickly and exactly as described. Really impressed with the quality, will definitely be ordering again.

Jessica L.

Fisheye Ball Bearing Rod Ends – M3 M4 Female Thread for 3D Printer Parts

4.8/5 (53 reviews)

Sale price  $40.99 Regular price  $75.99 SAVE 46%
  • Simple and practical everyday product
  • Designed for convenience and ease of use
  • Lightweight and easy to store
  • Great gift or personal purchase
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Product Details

These M3/M4 fisheye ball bearings are small rod-end joints designed for 3D printer builds. They’re ideal for makers assembling compact moving joints that require precise, compact ball bearings.

Key Features

  • Threaded for M3 or M4 mounts, enabling easy integration with common 3D printer frames and components.
  • Fisheye (fish-eye) ball bearing design provides smooth, low-friction articulation in tight spaces.
  • Aperture options of 3 mm or 4 mm support small linkage pins and rods used in printer assemblies.
  • Made from bearing steel for durability and wear resistance in hobbyist and light-industrial environments.
  • Compact, female ball bearing joints suitable for upgrade projects and custom mechanisms.

Product Details

  • Material: Bearing steel
  • Thread: M3 / M4
  • Aperture: 3 mm / 4 mm
  • Type: Fisheye ball bearing / rod end joint (female ball bearing)
  • Models: SI4T/K, SI3T/K
  • Origin: Mainland China

Additional Information

Product appearance, packaging, and minor details may vary slightly depending on the supplier or manufacturing batch.

If you have questions about a product before purchasing, please contact our support team and we will be happy to assist.

Shipping + Returns

Orders are processed within 1–4 business days before dispatch. Once shipped, delivery typically takes 7–15 business days depending on your location and demand.

Tracking information will be sent to your email once your order has been dispatched.

We offer a 30-day return window. If your item arrives damaged, defective, or incorrect, please contact our support team within 30 days of delivery and we will assist with a replacement or refund.

For full details, please refer to our Shipping Policy and Returns Policy pages.

Fisheye Ball Bearing Rod Ends – M3 M4 Female Thread for 3D Printer Parts

Fisheye Ball Bearing Rod Ends – M3 M4 Female Thread for 3D Printer Parts

Regular price  $75.99
Sale price  $40.99
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