1021 is a NSK cylindrical roller bearing, bore 105 mm, O.D. 160 mm, width 26 mm, dynamic rating 24,400 lbs. Dimensions, drawing, interchanges and price.
Original catalogue drawing - NSK catalogue, page 59
Scanned from the manufacturer catalogue page listing this part number. All part numbers printed on that table share the same drawing.
Scale cross-section
Blue = inner / outer ring, yellow = rolling element. Drawn to scale from this part's own
dimensions for selection reference only - not a manufacturing or assembly drawing.
Dimension table (mm / inch)
Symbol
Dimension
mm
inch
d
Bore diameter
105
4.1339
D
Outside diameter
160
6.2992
B
Inner-ring / bearing width
26
1.0236
Notes
Cylindrical roller entries from the NSK inch catalogue are series numbers covering the N / NU / NJ / NUP / NH prefixes of the same size. Weights are given in kg. Load ratings are shown in both the original catalogue units and the converted value (1 N = 0.2248 lbf). Data is provided for selection reference only - confirm against the latest official catalogue before ordering.
Main dimensions
Bore d (mm)
105
Bore d (in)
4.1339
Outside dia. D (mm)
160
Outside dia. D (in)
6.2992
Width B (mm)
26
Width B (in)
1.0236
Load ratings & speeds
Basic dynamic load rating Cr (lbs)
24400
Basic static load rating Cor (lbs)
33400
Limiting speed - grease (rpm)
4,000
Limiting speed - oil (rpm)
4,800
Weight
Weight (kg)
1.805
Mounting dimensions (fillets / shoulders)
Fillet ra max (in)
0.079
Fillet rb max (in)
0.039
Shaft shoulder da min (in)
4.488
Housing shoulder Da max (in)
5.945
Shaft shoulder db min (in)
4.390
Shaft shoulder db max (in)
4.646
Housing shoulder Db min (in)
5.787
Housing shoulder Db max (in)
6.043
Bearing life (ISO 281 basic rating life)
C / P
Equivalent load P (N)
L10 (106 rev)
L10h at 1,300 rpm
4
27,134
102
1,302
6
18,089
392
5,032
8
13,567
1,024
13,128
10
10,854
2,154
27,621
15
7,236
8,323
106,711
Basic rating life per ISO 281: L10 = (C/P)10/3 with C = 108,537 N. Hours = L10 x 106 / (60n). Life-modification factors for lubrication, contamination and temperature (aISO) are not included.
Source & traceability
Brand
NSK
Source catalogue
NSK inch product catalogue
Catalogue page
p.61 (dimensions) / p.62 (ratings)
Dimensions in inches and millimetres, load ratings in lbs.
Send us the quantity you need and we will come back with price and
lead time, normally within 24 hours. Equivalent parts from other brands can be quoted at the same time.
