Miniature & Extra Small Ball Bearings
R1-4 Miniature & Extra Small Ball Bearing
1.984 × 6.35 × 2.38 mm
R1-4 is a miniature & extra small ball bearing from the MX-4 series with a 1.984 mm bore, a 6.35 mm outside diameter and a 2.38 mm width. It has a dynamic load rating of 251 N and a static load rating of 80 N and a speed rating of 71,100 rpm (oil lubrication), weighing about 0.35 g. The radial cross-section (D − d) is 4.37 mm.
Brands: NTN, FAG, SKF, NBC, DTC, SLS
R1-4 Specifications
| Bearing No. | R1-4 |
|---|---|
| d (Bore) | 1.984 mm |
| D (Outer Dia.) | 6.35 mm |
| B (Width) | 2.38 mm |
| Dynamic Load | 251 N |
| Static Load | 80 N |
| Max. RPM | 71,100 |
| Weight | 0.35 g |
| Series | Open Type Miniature & Extra Small Ball Bearings (1.984mm–9.525mm bore) |
R1-4 Variants & Designations
Typical designations for this size, subject to availability. Full suffix meanings are listed on the MX-4 series page.
Neighbouring Sizes in the MX-4 Series
R1-4 — Frequently Asked Questions
What are the dimensions of the R1-4 bearing?
The R1-4 has a bore (d) of 1.984 mm, an outside diameter (D) of 6.35 mm and a width of 2.38 mm, so it is written 1.984 × 6.35 × 2.38 mm.
What is the load rating of the R1-4?
Dynamic load rating 251 N and static load rating 80 N. The speed rating is 71,100 rpm with oil lubrication; for grease lubrication use about 75% of that value.
Is the R1-4 available with seals, special clearance or other options?
Yes, subject to availability. Typical designations include R1-4-ZZ (metal shields on both sides), R1-4-2RS (rubber seals on both sides). Tell us the exact designation you need in a quote request.
Do you supply the R1-4 bearing across India?
Yes. Logass Trade Centre supplies the R1-4 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 R1-4?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.