Miniature & Extra Small Ball Bearings
603 Miniature & Extra Small Ball Bearing
3 × 10 × 4 mm
603 is a miniature & extra small ball bearing from the MX-2 series with a 3 mm bore, a 10 mm outside diameter and a 4 mm width. It has a dynamic load rating of 553 N and a static load rating of 203 N and a speed rating of 49,500 rpm (oil lubrication), weighing about 1.4 g. The radial cross-section (D − d) is 7 mm.
Brands: NTN, FAG, SKF, NBC, DTC, SLS
603 Specifications
| Bearing No. | 603 |
|---|---|
| d (Bore) | 3 mm |
| D (Outer Dia.) | 10 mm |
| B (Width) | 4 mm |
| Dynamic Load | 553 N |
| Static Load | 203 N |
| Max. RPM | 49,500 |
| Weight | 1.4 g |
| Series | Open Type Miniature & Extra Small Ball Bearings (3mm–5mm bore) |
603 Variants & Designations
Typical designations for this size, subject to availability. Full suffix meanings are listed on the MX-2 series page.
603-ZZ
metal shields on both sides
603-2RS
rubber seals on both sides
Neighbouring Sizes in the MX-2 Series
603 — Frequently Asked Questions
What are the dimensions of the 603 bearing?
The 603 has a bore (d) of 3 mm, an outside diameter (D) of 10 mm and a width of 4 mm, so it is written 3 × 10 × 4 mm.
What is the load rating of the 603?
Dynamic load rating 553 N and static load rating 203 N. The speed rating is 49,500 rpm with oil lubrication; for grease lubrication use about 75% of that value.
Is the 603 available with seals, special clearance or other options?
Yes, subject to availability. Typical designations include 603-ZZ (metal shields on both sides), 603-2RS (rubber seals on both sides). Tell us the exact designation you need in a quote request.
Which other bearings have the same 3 mm bore as the 603?
Other miniature & extra small ball bearings with a 3 mm bore include F683 (6 mm OD), 3M06 (6 mm OD), F3M08 (7 mm OD), 683 (7 mm OD). A larger outside diameter generally means a higher load rating.
Do you supply the 603 bearing across India?
Yes. Logass Trade Centre supplies the 603 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 603?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.