Miniature & Extra Small Ball Bearings
R1-5 Miniature & Extra Small Ball Bearing
2.38 × 7.938 × 2.779 mm
R1-5 is a miniature & extra small ball bearing from the MX-4 series with a 2.38 mm bore, a 7.938 mm outside diameter and a 2.779 mm width. It has a dynamic load rating of 387 N and a static load rating of 137 N and a speed rating of 59,400 rpm (oil lubrication), weighing about 0.69 g. The radial cross-section (D − d) is 5.56 mm.
Brands: NTN, FAG, SKF, NBC, DTC, SLS
R1-5 Specifications
| Bearing No. | R1-5 |
|---|---|
| d (Bore) | 2.38 mm |
| D (Outer Dia.) | 7.938 mm |
| B (Width) | 2.779 mm |
| Dynamic Load | 387 N |
| Static Load | 137 N |
| Max. RPM | 59,400 |
| Weight | 0.69 g |
| Series | Open Type Miniature & Extra Small Ball Bearings (1.984mm–9.525mm bore) |
R1-5 Variants & Designations
Typical designations for this size, subject to availability. Full suffix meanings are listed on the MX-4 series page.
R1-5-ZZ
metal shields on both sides
R1-5-2RS
rubber seals on both sides
Other Bearings with 2.38 mm Bore
| Bearing No. | Series | D (Outer Dia.) mm | Dynamic Load N |
|---|---|---|---|
| R133 | MX-4 | 4.762 | 112 |
Neighbouring Sizes in the MX-4 Series
R1-5 — Frequently Asked Questions
What are the dimensions of the R1-5 bearing?
The R1-5 has a bore (d) of 2.38 mm, an outside diameter (D) of 7.938 mm and a width of 2.779 mm, so it is written 2.38 × 7.938 × 2.779 mm.
What is the load rating of the R1-5?
Dynamic load rating 387 N and static load rating 137 N. The speed rating is 59,400 rpm with oil lubrication; for grease lubrication use about 75% of that value.
Is the R1-5 available with seals, special clearance or other options?
Yes, subject to availability. Typical designations include R1-5-ZZ (metal shields on both sides), R1-5-2RS (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 R1-5?
Other miniature & extra small ball bearings with a 2.38 mm bore include R133 (4.762 mm OD). A larger outside diameter generally means a higher load rating.
Do you supply the R1-5 bearing across India?
Yes. Logass Trade Centre supplies the R1-5 Pan India with technical support, from single pieces to bulk orders. Use the quote button to share your quantity and brand preference.
Need pricing on the R1-5?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.