Miniature & Extra Small Ball Bearings
633 Miniature & Extra Small Ball Bearing
4 × 7 × 2 mm
633 is a miniature & extra small ball bearing from the MX-2 series with a 4 mm bore, a 7 mm outside diameter and a 2 mm width. It has a dynamic load rating of 283 N and a static load rating of 103 N and a speed rating of 61,200 rpm (oil lubrication), weighing about 0.24 g. The radial cross-section (D − d) is 3 mm.
Brands: NTN, FAG, SKF, NBC, DTC, SLS
633 Specifications
| Bearing No. | 633 |
|---|---|
| d (Bore) | 4 mm |
| D (Outer Dia.) | 7 mm |
| B (Width) | 2 mm |
| Dynamic Load | 283 N |
| Static Load | 103 N |
| Max. RPM | 61,200 |
| Weight | 0.24 g |
| Series | Open Type Miniature & Extra Small Ball Bearings (3mm–5mm bore) |
633 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
633 — Frequently Asked Questions
What are the dimensions of the 633 bearing?
The 633 has a bore (d) of 4 mm, an outside diameter (D) of 7 mm and a width of 2 mm, so it is written 4 × 7 × 2 mm.
What is the load rating of the 633?
Dynamic load rating 283 N and static load rating 103 N. The speed rating is 61,200 rpm with oil lubrication; for grease lubrication use about 75% of that value.
Is the 633 available with seals, special clearance or other options?
Yes, subject to availability. Typical designations include 633-ZZ (metal shields on both sides), 633-2RS (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 633?
Other miniature & extra small ball bearings with a 4 mm bore include F4M07 (7 mm OD), F684 (8 mm OD), 4M07 (8 mm OD), F4M08 (8.2 mm OD). A larger outside diameter generally means a higher load rating.
Do you supply the 633 bearing across India?
Yes. Logass Trade Centre supplies the 633 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 633?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.