1/8X1/4X7/64 Bearing SR144ZZ

Description

The SR144ZZ bearing is a 1/8″ x 1/4″ x 7/64″ (3.175 x 6.35 x 2.778 mm) miniature bearing made from stainless steel and fitted with double metal shields. It’s the stainless steel version of the popular R144ZZ, giving you the same size and fit with added corrosion resistance. It’s a reliable choice for small, precise applications where smooth rotation and long life matter.

SR144ZZ Bearing Specifications

• Bore (ID): 1/8″ (3.175 mm)
• Outside diameter (OD): 1/4″ (6.35 mm)
• Width: 7/64″ (2.778 mm)
• Material: Stainless steel
• Type: ZZ, double metal shields
• Equivalent: Stainless version of R144ZZ

Why Choose a Stainless Steel SR144ZZ Bearing?

Standard steel bearings perform well, but they can rust when exposed to moisture, humidity, or wet environments. The SR144ZZ bearing is made from stainless steel, so it holds up much better in those conditions while keeping the smooth, quiet rotation you expect. That makes it a smart upgrade for anything that sees damp air, occasional splashes, or long periods in storage.

What Does ZZ Mean?

The “ZZ” in SR144ZZ means the bearing has a metal shield on both sides. The shields help keep dust and debris out and hold the lubricant in, while still allowing low-friction rotation. For most everyday applications, a shielded bearing needs far less maintenance than an open one and stays cleaner for longer.

Where Is the SR144ZZ Bearing Used?

Thanks to its compact size, the SR144ZZ bearing is used in a wide range of small mechanisms, including small electric motors, RC models, fishing reels, hobby tools, instruments, and other light-load precision assemblies. If your current part calls for an R144ZZ and you want better corrosion resistance, this bearing is a direct swap.

How to Get the Longest Life From Your Bearing

Make sure the bearing is pressed in squarely and evenly. Pushing on the outer race when fitting it into a housing (or the inner race when fitting it onto a shaft) helps avoid damage to the balls and races. Keep the area around the bearing clean, avoid prying at the shields, and store spare bearings in a dry place until you need them.

SR144ZZ Bearing FAQ

Is the SR144ZZ the same size as the R144ZZ?
Yes. Both measure 1/8″ x 1/4″ x 7/64″. The SR144ZZ is simply the stainless steel version.

Do I need to oil a shielded bearing?
Shielded bearings come lubricated and generally don’t need regular oiling in normal use, which is one of their main advantages over open bearings.

Where Can I Find More Precision Bearings?

Browse our full range of Stainless Steel Bearings for more miniature and specialty sizes, all in stock and ready to ship nationwide. Questions about fit? Call us at (+1) 978-254-3987.