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Precision Cylindrical Roller Bearings

Precision Cylindrical Roller Bearings

IKC cylindrical roller bearings have many designs, dimension series and sizes. The majority is single row bearings with a cage. Single and double row full complement bearings (without cage) complete the IKC standard assortment for general engineering. Bearings with a cage can accommodate heavy radial loads and operate at high speeds. Full complement cylindrical roller bearings are suitable for very heavy radial loads at moderate speeds.
 
The rollers of IKC cylindrical roller bearings are key components. Their geometry, the so-called logarithmic profile, provides an optimum stress distribution in the contact zones in the bearing. Their surface finish maximizes lubricant film formation and optimizes rolling motion of the rollers. The benefits derived from this compared with traditional designs include enhanced operational reliability and a greater insensitivity to misalignment.
 
The range of IKC cylindrical roller bearings comprises the basic types
 
IKC single row cylindrical roller bearings, caged, mainly of the NU, NJ, NUP and N designs.
 
IKC double row cylindrical roller bearings, caged, mainly of the NNUand NN designs.
 
IKC single row full complement cylindrical roller bearings, mainly of the NCF and NJG designs.
 
IKC double row full complement cylindrical roller bearings, mainly of the NNF design.
Dimensions
The dimensions of the standard IKC single row cylindrical roller bearings are in accordance with ISO 15:1998.
Tolerances
IKC single row cylindrical roller bearings are manufactured with normal tolerances for dimensional accuracy and P6 tolerances for running accuracy as standard. Some bearings, particularly those of the narrow series 18, 19 and 10, are also available with higher accuracy to tolerance class P6 or P5. The tolerances are in accordance with ISO 492:2002.
Radial internal clearance
IKC single row cylindrical roller bearings are manufactured with normal radial internal clearance as standard and most of the bearings are also available with C3 radial internal clearance. Some of the bearings can even be supplied with the smaller C2 or the greater C4 clearance. In addition, some bearings are produced with special reduced clearances. This special clearance corresponds to a section of a standard clearance range or two adjacent clearance ranges.
 
Bearings with non-standard clearance or special reduced clearances can be supplied to special order.
 
The actual clearance limits for bearings with a cylindrical bore and a tapered bore are in accordance with ISO 5753:1991. They are valid for unmounted bearings under zero measuring load.
 
The separable components of all bearings with standard clearance as well as those with reduced clearance are interchangeable.
Axial internal clearance
NUP design cylindrical roller bearings, which can locate a shaft axially in both directions, are manufactured with an axial internal clearance as shown in table 3. The axial internal clearance of NJ-design bearings when combined with an HJ angle ring is specified in table 4.
 
The clearance limits quoted in tables 3 and 4 should be considered as guideline values. When axial internal clearance is measured, the rollers may tilt, causing an enlargement of the axial clearance, which may be as much as.
-
 the radial internal clearance of bearings in the 2, 3 and 4 series or
-
 2/3 of the radial internal clearance for bearings in the 22 and 23 series,
For example.
 
 cylindrical roller bearing
Table 1:Radial internal clearance of cylindrical roller bearings with cylindrical bore
 
 
Bore Radial Internal clearance                    
Diameter d C1 SPC2 C2 Normal C3 C4 C5
over incl. min max min max min max min max min max min max min max
 
 
 
- 24 - - - - 0 25 20 45 35 60 50 75 65 90
24 30 5 15 10 25 0 25 20 45 35 60 50 75 70 95
30 40 5 15 12 25 5 30 25 50 45 70 60 85 80 105
                               
40 50 5 18 15 30 5 35 30 60 50 80 70 100 95 125
50 65 5 20 15 35 10 40 40 70 60 90 80 110 110 140
65 80 10 25 20 40 10 45 40 75 65 100 90 125 130 165
                               
80 100 10 30 25 45 15 50 50 85 75 110 105 140 155 190
100 120 10 30 25 50 15 55 50 90 85 125 125 165 180 220
120 140 10 35 30 60 15 60 60 105 100 145 145 190 200 245
                               
140 160 10 35 35 65 20 70 70 120 115 165 165 215 225 275
160 180 10 40 35 75 25 75 75 125 120 170 170 220 250 300
180 200 15 45 40 80 35 90 90 145 140 195 195 250 275 330
                               
200 225 15 50 45 90 45 105 105 165 160 220 220 280 305 365
225 250 15 50 50 100 45 110 110 175 170 235 235 300 330 395
250 280 20 55 55 110 55 125 125 195 190 260 260 330 370 440
                               
280 315 20 60 60 120 55 130 130 205 200 275 275 350 410 485
315 355 20 65 65 135 65 145 145 225 225 305 305 385 455 535
355 400 25 75 75 150 100 190 190 280 280 370 370 460 510 600
                               
400 450 25 85 85 170 110 210 210 310 310 410 410 510 565 665
450 500 25 95 95 190 110 220 220 330 330 440 440 550 625 735
500 560 25 105 105 210 120 240 240 360 360 480 480 600 690 810
                               
560 630 25 115 115 230 140 260 260 380 380 500 500 620 780 900
630 710 30 130 130 260 145 285 285 425 425 565 565 705 865 1005
710 800 35 145 145 290 150 310 310 470 470 630 630 790 975 1135
                               
800 900 40 160 160 320 180 350 350 520 520 690 690 860 1095 1265
900 1000 - - - - 200 390 390 580 580 770 770 960 1215 1405
1000 1120 - - - - 220 430 430 640 640 850 850 1060 1355 1565
                               
1120 1250 - - - - 230 470 470 710 710 950 950 1190 1510 1750
1250 1400 - - - - 270 530 530 790 790 1050 1050 1310 1680 1940
1400 1600 - - - - 330 610 610 890 890 1170 1170 1450 1920 2200
                               
1600 1800 - - - - 380 700 700 1020 1020 1340 1340 1660 2160 2480
1800 2000 - - - - 400 760 760 1120 1120 1480 1480 1840 2390 2760