Miniature & Extra Small Ball Bearings
R133 Miniature & Extra Small Ball Bearing
2.38 × 4.762 × 1.588 mm
R133 is a miniature & extra small ball bearing from the MX-4 series with a 2.38 mm bore, a 4.762 mm outside diameter and a 1.588 mm width. It has a dynamic load rating of 112 N and a static load rating of 38 N and a speed rating of 76,500 rpm (oil lubrication), weighing about 0.12 g. The radial cross-section (D − d) is 2.38 mm.
Brands: NTN, FAG, SKF, NBC, DTC, SLS
R133 Specifications
| Bearing No. | R133 |
|---|---|
| d (Bore) | 2.38 mm |
| D (Outer Dia.) | 4.762 mm |
| B (Width) | 1.588 mm |
| Dynamic Load | 112 N |
| Static Load | 38 N |
| Max. RPM | 76,500 |
| Weight | 0.12 g |
| Series | Open Type Miniature & Extra Small Ball Bearings (1.984mm–9.525mm bore) |
R133 Variants & Designations
Typical designations for this size, subject to availability. Full suffix meanings are listed on the MX-4 series page.
Other Bearings with 2.38 mm Bore
| Bearing No. | Series | D (Outer Dia.) mm | Dynamic Load N |
|---|---|---|---|
| R1-5 | MX-4 | 7.938 | 387 |
Neighbouring Sizes in the MX-4 Series
R133 — Frequently Asked Questions
What are the dimensions of the R133 bearing?
The R133 has a bore (d) of 2.38 mm, an outside diameter (D) of 4.762 mm and a width of 1.588 mm, so it is written 2.38 × 4.762 × 1.588 mm.
What is the load rating of the R133?
Dynamic load rating 112 N and static load rating 38 N. The speed rating is 76,500 rpm with oil lubrication; for grease lubrication use about 75% of that value.
Is the R133 available with seals, special clearance or other options?
Yes, subject to availability. Typical designations include R133-ZZ (metal shields on both sides), R133-2RS (rubber seals on both sides). Tell us the exact designation you need in a quote request.
Which other bearings have the same 2.38 mm bore as the R133?
Other miniature & extra small ball bearings with a 2.38 mm bore include R1-5 (7.938 mm OD). A larger outside diameter generally means a higher load rating.
Do you supply the R133 bearing across India?
Yes. Logass Trade Centre supplies the R133 Pan India with technical support, from single pieces to bulk orders. Use the quote button to share your quantity and brand preference.
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 the R133?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.