Product Details

38 mm x 53 mm x 30 mm KOYO NKJ38/30 Needle Roller Bearings

Brand Name KOYO
Model Number NKJ38/30
Min.Order Quantity 1 pcs
Price Negotiable

Product Features

KOYO NKJ38/30 bearing Size Chart (mm/inches)

Bearing number7044 ACD/P4A
Size (mm)340x220x56
Bore Diameter (mm)340
Outer Diameter (mm)220
Width (mm)56
d220 mm
D340 mm
B56 mm
d1257 mm
d2257 mm
D1303 mm
r1,2 - min.3 mm
r3,4 - min.1.5 mm
a93.6 mm
da - min.233 mm
db - min.233 mm
Da - max.327 mm
Db - max.334 mm
ra - max.2.5 mm
rb - max.1.5 mm
dn267.1 mm
Basic dynamic load rating - C319 kN
Basic static load rating - C0440 kN
Fatigue load limit - Pu11 kN
Limiting speed for grease lubrication3600 r/min
Limiting speed for oil lubrication5300 mm/min
Ball - Dw38.1 mm
Ball - z21
Gref201 cm3
Calculation factor - e0.68
Calculation factor - Y20.87
Calculation factor - Y00.38
Calculation factor - X20.41
Calculation factor - Y10.92
Calculation factor - Y21.41
Calculation factor - Y00.76
Calculation factor - X20.67
Preload class A - GA2000 N
Preload class B - GB4000 N
Preload class C - GC8000 N
Preload class D - GD16000 N
Calculation factor - f1.13
Calculation factor - f10.99
Calculation factor - f2A1
Calculation factor - f2B1.02
Calculation factor - f2C1.05
Calculation factor - f2D1.08
Calculation factor - fHC1
Preload class A546 N/micron
Preload class B710 N/micron
Preload class C935 N/micron
Preload class D1254 N/micron
CategoryPrecision Ball Bearings
Inventory0.0
Manufacturer NameSKF
Minimum Buy QuantityN/A
Weight / Kilogram18.957
EAN7316570222104
Product GroupB04270
EnclosureOpen
Precision ClassABEC 7 | ISO P4
Material - BallSteel
Number of Bearings1 (Single)
Contact Angle25 Degree
PreloadNone
Raceway Style1 Rib Outer Ring
Cage MaterialPhenolic
Rolling ElementBall Bearing
Flush GroundNo
Inch - MetricMetric
Other FeaturesSingle Row | Angular Contact | High Precision
Long Description220MM Bore; 340MM Outside Diameter; 56MM Width; Open Enclosure; ABEC 7 | ISO P4 Precision; Steel Ball Material; 1 (Single) Bearings; 25 Degree Contact Angle; Phenolic Cage Material; 1 Rib Outer Ring R
CategoryPrecision Ball Bearings
UNSPSC31171531
Harmonized Tariff Code8482.10.50.28
NounBearing
Keyword StringAngular Contact Ball
Manufacturer URLhttp://www.skf.com
Manufacturer Item Number7044 ACD/P4A
Weight / LBS41.756
Bore8.661 Inch | 220 Millimeter
Outside Diameter13.386 Inch | 340 Millimeter
Width2.205 Inch | 56 Millimeter
d1257 mm
d2257 mm
D1303 mm
r1,2 min.3 mm
r3,4 min.1.5 mm
da min.233 mm
db min.233 mm
Da max.327 mm
Db max.334 mm
ra max.2.5 mm
rb max.1.5 mm
dn267.1 mm
Basic dynamic load rating C319 kN
Basic static load rating C0440 kN
Fatigue load limit Pu11 kN
Attainable speed for grease lubrication3600 r/min
Attainable speed for oil-air lubrication5300 r/min
Ball diameter Dw38.1 mm
Number of balls z21
Reference grease quantity Gref201 cm³
Preload class A GA2000 N
Static axial stiffness, preload class A546 N/µm
Preload class B GB4000 N
Static axial stiffness, preload class B710 N/µm
Preload class C GC8000 N
Static axial stiffness, preload class C935 N/µm
Preload class D GD16000 N
Static axial stiffness, preload class D1254 N/µm
Calculation factor f1.13
Calculation factor f10.99
Calculation factor f2A1
Calculation factor f2B1.02
Calculation factor f2C1.05
Calculation factor f2D1.08
Calculation factor fHC1
Calculation factor e0.68
Calculation factor (single, tandem) Y20.87
Calculation factor (single, tandem) Y00.38
Calculation factor (single, tandem) X20.41
Calculation factor (back-to-back, face-to-face) Y10.92
Calculation factor (back-to-back, face-to-face) Y21.41
Calculation factor (back-to-back, face-to-face) Y00.76
Calculation factor (back-to-back, face-to-face) X20.67
Mass bearing16.1 kg
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