Cylindrical Roller Bearings
NU321 Cylindrical Roller Bearing
105 × 225 × 49 mm
NU321 is a cylindrical roller bearing from the NU3 series with a 105 mm bore, a 225 mm outside diameter and a 49 mm width. It has a dynamic load rating of 324,000 N and a static load rating of 373,500 N and a speed rating of 3,330 rpm (oil lubrication), weighing about 8.53 kg. The radial cross-section (D − d) is 120 mm.
Brands: NTN, FAG, SKF, NBC, DTC, SLS
NU321 Specifications
| Bearing No. | NU321 |
|---|---|
| d (Bore) | 105 mm |
| D (Outer Dia.) | 225 mm |
| B (Width) | 49 mm |
| Dynamic Load | 324,000 N |
| Static Load | 373,500 N |
| Max. RPM | 3,330 |
| Weight | 8.53 kg |
| Series | NU3 Series Single Row Cylindrical Roller Bearings |
NU321 Variants & Designations
Typical designations for this size, subject to availability. Full suffix meanings are listed on the NU3 series page.
NU321 C3
radial clearance larger than normal
NU321 M
machined brass cage
NU321 K
tapered bore (1:12)
NU321 P6
higher running accuracy (ISO class 6)
Neighbouring Sizes in the NU3 Series
NU321 — Frequently Asked Questions
What are the dimensions of the NU321 bearing?
The NU321 has a bore (d) of 105 mm, an outside diameter (D) of 225 mm and a width of 49 mm, so it is written 105 × 225 × 49 mm.
What is the load rating of the NU321?
Dynamic load rating 324,000 N and static load rating 373,500 N. The speed rating is 3,330 rpm with oil lubrication; for grease lubrication use about 75% of that value.
Is the NU321 available with seals, special clearance or other options?
Yes, subject to availability. Typical designations include NU321 C3 (radial clearance larger than normal), NU321 M (machined brass cage), NU321 K (tapered bore (1:12)), NU321 P6 (higher running accuracy (ISO class 6)). Tell us the exact designation you need in a quote request.
Which other bearings have the same 105 mm bore as the NU321?
Other cylindrical roller bearings with a 105 mm bore include NU1021 (160 mm OD), N221 (190 mm OD), NF221 (190 mm OD), NJ221 (190 mm OD). A larger outside diameter generally means a higher load rating.
Do you supply the NU321 bearing across India?
Yes. Logass Trade Centre supplies the NU321 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 NU321?
Share your quantity and preferred brand — our technical team will confirm availability and pricing within one business day.