Attributes

Brand	-
Category	Industrial Small Parts / Bearings & Bushings
Origin	-
Brand	NMB (MinebeaMitsumi)
Model Number	SMR137ZZ / DDL-1370ZZ
Bore Diameter	7 mm
Outer Diameter	13 mm
Width	4 mm
Material	Stainless Steel 440C
Shield Type	Metal Shield (ZZ)
Precision Grade	ABEC-7 / ISO Class 4
Dynamic Load Rating	6.8 kN
Country of Origin	Thailand

5 reviews

Anonymous

Apr 12, 2026

Rating: 5/5

Precision is noticeable

You can feel the difference compared to cheaper generic bearings. Highly recommended.

Anonymous

Apr 09, 2026

Rating: 5/5

Exactly as described

Dimensions matched my calipers exactly. Fast shipping and well packaged.

Anonymous

Mar 30, 2026

Rating: 5/5

Great for fishing reels

Used these to upgrade my saltwater reel. Stainless steel holds up well against corrosion.

Anonymous

Mar 28, 2026

Rating: 4/5

Good quality, tight fit

Genuine NMB quality. They were a bit tight at first but loosened up after use.

Anonymous

Mar 08, 2026

Rating: 5/5

Perfect for robotics

These bearings fit perfectly in my robotic arm joint. Smooth rotation and no play.

5 FAQ

Q: Are these rust-proof?

A: They are made of stainless steel offering high corrosion resistance, but not entirely rust-proof in harsh chemicals.

Q: Is this compatible with SMR137?

A: Yes, this is the same bearing with ZZ metal shields.

Q: What is the tolerance class?

A: These are manufactured to ISO Class 4 precision standards.

Q: Are these pre-lubricated?

A: Yes, they come with light oil lubrication from the factory.

Q: What is the maximum RPM?

A: Suitable for high-speed applications, typically up to 30,000 RPM depending on load.

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