Miniature & Extra Small Ball Bearings
R156 Miniature & Extra Small Ball Bearing
4.762 × 7.938 × 2.779 mm
R156 is a miniature & extra small ball bearing from the MX-4 series with a 4.762 mm bore, a 7.938 mm outside diameter and a 2.779 mm width. It has a dynamic load rating of 355 N and a static load rating of 129 N and a speed rating of 52,200 rpm (oil lubrication), weighing about 0.44 g. The radial cross-section (D − d) is 3.18 mm.
Brands: NTN, FAG, SKF, NBC, DTC, SLS
R156 Specifications
| Bearing No. | R156 |
|---|---|
| d (Bore) | 4.762 mm |
| D (Outer Dia.) | 7.938 mm |
| B (Width) | 2.779 mm |
| Dynamic Load | 355 N |
| Static Load | 129 N |
| Max. RPM | 52,200 |
| Weight | 0.44 g |
| Series | Open Type Miniature & Extra Small Ball Bearings (1.984mm–9.525mm bore) |
R156 Variants & Designations
Typical designations for this size, subject to availability. Full suffix meanings are listed on the MX-4 series page.
R156-ZZ
metal shields on both sides
R156-2RS
rubber seals on both sides
Neighbouring Sizes in the MX-4 Series
R156 — Frequently Asked Questions
What are the dimensions of the R156 bearing?
The R156 has a bore (d) of 4.762 mm, an outside diameter (D) of 7.938 mm and a width of 2.779 mm, so it is written 4.762 × 7.938 × 2.779 mm.
What is the load rating of the R156?
Dynamic load rating 355 N and static load rating 129 N. The speed rating is 52,200 rpm with oil lubrication; for grease lubrication use about 75% of that value.
Is the R156 available with seals, special clearance or other options?
Yes, subject to availability. Typical designations include R156-ZZ (metal shields on both sides), R156-2RS (rubber seals on both sides). Tell us the exact designation you need in a quote request.
Which other bearings have the same 4.762 mm bore as the R156?
Other miniature & extra small ball bearings with a 4.762 mm bore include R166 (9.525 mm OD), R3 (12.7 mm OD). A larger outside diameter generally means a higher load rating.
Do you supply the R156 bearing across India?
Yes. Logass Trade Centre supplies the R156 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 R156?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.