Miniature & Extra Small Ball Bearings
R144 ZZ Bearing
3.175 × 6.356 × 2.38 mm
Also written R144/ZZ
R144 ZZ is the R144 miniature & extra small ball bearing (3.175 mm bore, 6.356 mm outside diameter) with the option ZZ. The standard-design dimensions below come from our MX-4 series table.
R144 ZZ Specifications
Standard-design values for R144. Load and speed ratings can differ for sealed or special versions; we confirm them on quotation.
| Bearing No. | R144 |
|---|---|
| d (Bore) | 3.175 mm |
| D (Outer Dia.) | 6.356 mm |
| B (Width) | 2.38 mm |
| Dynamic Load | 256 N |
| Static Load | 86 N |
| Max. RPM | 63,000 |
| Weight | 0.27 g |
| Series | Open Type Miniature & Extra Small Ball Bearings (1.984mm–9.525mm bore) |
Reading the Designation R144 ZZ
| R144 | Base size: miniature & extra small ball bearing, 3.175 × 6.356 × 2.38 mm. |
|---|---|
| ZZ | metal shields on both sides |
Suffix meanings vary slightly between manufacturers (SKF, FAG, NTN, NSK and others each have their own codes), so we always confirm the exact designation before supplying.
Other Bearings with a 3.175 mm Bore
R144 ZZ — Frequently Asked Questions
What are the dimensions of the R144 ZZ bearing?
The base size R144 measures 3.175 × 6.356 × 2.38 mm (bore × outside diameter × width). Suffixes such as ZZ change the sealing, clearance, cage or special treatment but not the boundary dimensions of the standard design.
What does R144 ZZ mean?
R144 is the base size. ZZ: metal shields on both sides. Suffix meanings can differ slightly between manufacturers, so confirm the exact designation with us before ordering.
Can you supply the R144 ZZ bearing across India?
Yes. Share the exact designation, quantity and preferred brand through the quote button and our technical team will confirm availability and pricing within one business day.
Can’t find your size?
We supply sizes, brands and special versions of miniature & extra small ball bearings that are not listed on this page. Type the exact size or designation you need and send it to us for a quote.
Need pricing on R144 ZZ?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.