NN 3028 K/SPW33

Super-precision double row cylindrical roller bearing with tapered bore and lubrication feature

Super-precision double row cylindrical roller bearings in the NN 30 series provide a unique balance between load carrying capacity, rigidity and speed.

Having three flanges on the inner ring and no flanges on the outer ring, the bearings can accommodate axial displacement in both directions. The separable design simplifies mounting and dismounting, particularly when load conditions require both rings to have an interference fit. The tapered bore enables accurate adjustment of clearance or preload during mounting.

  • Very high radial load carrying capacity
  • High rigidity and high running accuracy
  • Minimize noise, vibration and heat generation
  • Accommodate axial displacement in both directions
  • Lubrication feature

Dimensions

d
140 mm
 Bore diameter
D
210 mm
 Outside diameter
B
53 mm
 Width
d1
166.5 mm
 Shoulder diameter inner ring (NN design)
E
192 mm
 Raceway diameter outer ring (NN design)
b
8.75 mm
 Width annular lubrication groove at outer ring
K
4.5 mm
 Diameter lubrication hole (outer ring)
r1,2
min.2 mm
 Chamfer dimension outer ring
r3,4
min.1.1 mm
 Chamfer dimension inner ring (bearing with tapered bore)
s
max.2.5 mm
 Permissible axial displacement from the normal position of one bearing ring relative to the other (all)
Abutment dimensions - NN 3028 K/SPW33

Abutment dimensions

da
min.150 mm
 Abutment diameter shaft
Da
min.194 mm
 Abutment diameter housing
Da
max.200 mm
 Abutment diameter housing
ra
max.2 mm
 Fillet radius
dn
188 mm
 Oil nozzle position (not for variants with TNHA cage)

Calculation data

Basic dynamic load rating C
297 kN
Basic static load rating C0
520 kN
Fatigue load limit Pu
56 kN
Attainable speed for grease lubrication
4 000 r/min
Attainable speed for oil-air lubrication
4 500 r/min
Reference grease quantity Gref
52 cm³
Static radial stiffness (guideline value)
3 070 N/µm
Add to Enquiry
SKU: NN 3028 K/SPW33-SKF Categories: , , ,
SKF

Description

Properties

Bearing part Complete bearing
Number of rows 2
Bore type Tapered 1:12
Cage Machined metal
Design NN
Number of flanges, outer ring 0
Number of flanges, inner ring 3
Loose flange None
Radial internal clearance C1
Tolerance class Class SP (SP)
Material, bearing Bearing steel
Coating Without
Sealing Without
Lubricant None
Relubrication feature Annular groove and lubrication holes
Indicative carbon footprint for new product 22.2 kg CO2e
Bore type
Tapered 1:12

Logistics

Product net weight 6.15 kg
eClass code 23-05-09-01
UNSPSC code 31171505

Recommended tool

GB 30 internal clearance gauge GB 3028
GRA 30 ring gauge GRA 3028

(140X210X53) (NN3028KSPW33)

Additional information

Weight 6.15 kg
Size (mm)

Colour

Related products