One And One Eighth Inch Ball Bearing With Integrated Three Eighth Inch Pin Diameter And One Inch Axle Length For Precision Machinery And Hobby Projects Outer Diameter About Twenty Eight Millimeters

1-1/8 in Ball Bearing with 3/8 in Stem and 1 in Axle
✔️ Single bearing assembly: 9.53 mm pin, 28.58 mm OD, 25.4 mm long

This compact ball bearing assembly uses chrome steel 52100 alloy and integrates a 3/8" pin with a 1" axle for smooth, precise rotation in tight spaces. It’s commonly used in hobby robotics, small machines, and DIY gear setups.

✅ Bearing outer diameter: 1 1/8 in (28.58 mm)
✅ Pin diameter: 3/8 in (9.53 mm)
✅ Assembly width/length: 1 in (25.4 mm)
✅ Axle length: 1 in (25.4 mm)
✅ Material: 52100 chrome steel (carbon alloy)
✅ Pack Size: 1 (single bearing assembly)

💡 What is a sealed ball bearing used for in small mechanical assemblies?

This handy part helps shafts spin smoothly in tight spaces. - Reduces friction and wear on rotating shafts. - Keeps shafts properly aligned in compact gear trains. - Works with standard 3/8" pins and 1" axles for easy swaps.