NTN 4-Row Cylindrical Roller Bearings 4R2438:
1) The bearings are mainly used in the roll necks of steel rolling mills and designed so that the load rating is maximized in the allowable space of the roll neck part.
2) The cage types include a comb type cage and a pin type cage (that uses hollow rollers). The pin type cage maximizes the number of rollers for high load capacity.
3) Carburizing (case hardened) steel is used in some cases to prevent inner ring cracks and to improve shock resistance.
4) Consult us for bearing internal clearance and fits to be used for back-up rolls of rolling mills.
5) There are many varieties of these bearings, including bearings which are sealed, have tapered bores, designed for high speed, have creep prevention, etc. Contact us for further
details.
| Boundary dimensions mm | dynamic kN | Basic load ratings static dynamic static kgf | Bearingo numbers | Drawing2 No. | |||
| d | D B1 C1 rs min rls min | Cr | Cor | Cr | Cor | ||
| 100 | 150 74 74 2 2 | 262 | 510 | 26,700 | 52,500 | 4R2035 | A |
| 120 | 180 92 92 2.5 2.5 | 400 | 785 | 40,500 | 80,000 | 4R2437 | A |
| 180 105 105 2.5 2.5 | 445 | 855 | 45,500 | 87,000 | 4R2438 | A | |
| 130 | 200 104 104 2.5 2.5 | 490 | 955 | 49,500 | 97,000 | 4R2628 | A |
| 140 | 190 119 119 1.5 1.5 | 495 | 1,190 | 50,500 | 121,000 | 4R2832 | B2） |
| 210 116 116 2.5 2.5 | 510 | 1,030 | 52,000 | 105,000 | 4R2823 | A | |
| 145 | 210 155 155 2.5 2.5 | 705 | 1,640 | 71,500 | 168,000 | 4R2906 | A |
| 225 156 156 2.5 2.5 | 810 | 1,750 | 82,500 | 178,000 | 4R2904 | A | |
| 220 127 120 2.5 2.5 | 615 | 1,280 | 63,000 | 130,000 | 4R3036 | A | |
| 220 150 150 2.5 2.5 | 750 | 1,640 | 76,500 | 168,000 | 4R3031 | A | |
| 220 150 150 2.5 2.5 | 750 | 1,640 | 76,500 | 168,000 | 4R3056 | A | |
| 150 | 230 130 130 2.5 2.5 | 725 | 1,520 | 73,500 | 155,000 | 4R3029 | A |
| 230 156 156 2.5 2.5 | 930 | 2,040 | 95,000 | 208,000 | 4R3040 | A | |
| 230 168 168 2 2 | 845 | 1,950 | 86,000 | 199,000 | 4R3042 | A | |
| 250 150 150 2.5 2.5 | 885 | 1,640 | 90,500 | 167,000 | 4R3039 | A | |
| 151.5 | 230 168 168 1.5 2.5 | 850 | 2,060 | 87,000 | 210,000 | 4R3033K | A |
| 220 180 180 2.5 2.5 | 920 | 2,490 | 93,500 | 254,000 | 4R3224 | D3 | |
| 230 130 130 2.5 2.5 | 665 | 1,340 | 68,000 | 136,000 | 4R3226 | A | |
| 230 168 168 2.5 2.5 | 915 | 2,170 | 93,500 | 222,000 | 4R3232 | A | |
| 160 | 230 168 168 2.5 2.5 | 895 | 2,200 | 91,500 | 225,000 | 4R3229 | A |
| 230 168 168 2.5 2.5 | 895 | 2,210 | 91,000 | 225,000 | 4R3231 | A | |
| 230 180 180 2.5 2.5 | 920 | 2,490 | 93,500 | 254,000 | 4R3228 | D3 | |
| 240 170 170 2 2.5 | 980 | 2,290 | 100,000 | 234,000 | 4R3225 | A | |
| 230 120 120 2.5 2.5 | 620 | 1,520 | 63,000 | 155,000 | 4R3426 | A | |
| 230 120 120 2 2 | 620 | 1,520 | 63,000 | 155,000 | 4R3443 | C | |
| 240 156 156 2.5 2.5 | 905 | 2,170 | 92,500 | 222,000 | 4R3429 | A | |
| 170 | 240 160 160 2.5 2.5 | 905 | 2,180 | 92,000 | 222,000 | 4R3423 | A |
| 250 168 168 2.5 2.5 | 970 | 2,220 | 99,000 | 226,000 | 4R3432 | A | |
| 250 168 168 2.5 2.5 | 1,030 | 2,390 | 105,000 | 243,000 | 4R3428 | A | |
| 255 180 180 2.5 2.5 | 1,100 | 2,430 | 112,000 | 247,000 | 4R3425 | A | |
| 260 150 150 2.5 2.5 | 835 | 1,750 | 85,000 | 179,000 | 4R3433 | A | |
CMTG BEARING CO.,LIMITED. has been engaged in bearing industry for many years, we provide a wide selections of brands, including FAG bearing, SKF bearing,NSK bearing,Nachi bearing, TIMKEN bearing, THK Linear Guide and Linear Block …ect.
Bearing typies including standard bearing and non-standard bearings, linear bearings, automotive bearings, large bearings, railway bearings,spherical plain bearings, high temperature,super-precision bearings, as well as some rare types customized to your need.
Bearings are exported to more than 50 countries and regions in the world, many types of inventory stock.
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Contact us if any bearing in demand . we will check and revert ASAP.
Warmly welcome your inquiry.
