Miniature & Extra Small Ball Bearings
4M08 Miniature & Extra Small Ball Bearing
4 × 9 × 2.5 mm
4M08 is a miniature & extra small ball bearing from the MX-2 series with a 4 mm bore, a 9 mm outside diameter and a 2.5 mm width. It has a dynamic load rating of 576 N and a static load rating of 203 N and a speed rating of 54,900 rpm (oil lubrication), weighing about 0.65 g. The radial cross-section (D − d) is 5 mm.
Brands: NTN, FAG, SKF, NBC, DTC, SLS
4M08 Specifications
| Bearing No. | 4M08 |
|---|---|
| d (Bore) | 4 mm |
| D (Outer Dia.) | 9 mm |
| B (Width) | 2.5 mm |
| Dynamic Load | 576 N |
| Static Load | 203 N |
| Max. RPM | 54,900 |
| Weight | 0.65 g |
| Series | Open Type Miniature & Extra Small Ball Bearings (3mm–5mm bore) |
4M08 Variants & Designations
Typical designations for this size, subject to availability. Full suffix meanings are listed on the MX-2 series page.
Neighbouring Sizes in the MX-2 Series
4M08 — Frequently Asked Questions
What are the dimensions of the 4M08 bearing?
The 4M08 has a bore (d) of 4 mm, an outside diameter (D) of 9 mm and a width of 2.5 mm, so it is written 4 × 9 × 2.5 mm.
What is the load rating of the 4M08?
Dynamic load rating 576 N and static load rating 203 N. The speed rating is 54,900 rpm with oil lubrication; for grease lubrication use about 75% of that value.
Is the 4M08 available with seals, special clearance or other options?
Yes, subject to availability. Typical designations include 4M08-ZZ (metal shields on both sides), 4M08-2RS (rubber seals on both sides). Tell us the exact designation you need in a quote request.
Which other bearings have the same 4 mm bore as the 4M08?
Other miniature & extra small ball bearings with a 4 mm bore include F4M07 (7 mm OD), 633 (7 mm OD), F684 (8 mm OD), 4M07 (8 mm OD). A larger outside diameter generally means a higher load rating.
Do you supply the 4M08 bearing across India?
Yes. Logass Trade Centre supplies the 4M08 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 4M08?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.