Current Location：Products:High-precision Cross Roller Bearing
The XRT series of cross-tapered roller bearings are designed to provide high degrees of rotation and stiffness in a small space, resulting in significant material cost savings. This type of bearing is to install two sets of bearing races and rollers at right angles. The adjacent rollers are facing in opposite directions. The spacers are installed between the rollers and the rollers. The rollers are also equipped with support spacers. This allows the two halves of the roller to fit into the same space. The angle and tapered geometry of the bearing allows the effective span of the bearing to be several times larger than the actual width of the bearing itself.
XRT series bearings are suitable for high speed machine tools such as vertical boring machines and vertical grinding machines. It is also especially suitable for many devices with limited space and high rotation accuracy.
Size range:
Inner diameter 101.600 mm to 2463.800 mm (4.000 in. to 97.000 in.)
Outside diameter 279.400 mm to 2819.400 mm (11.000 in. to 111.000 in.)
Design features:
The XRT series has two rows of tapered rollers that are vertically aligned by a spacer on a V-shaped hob surface of 90°, and can withstand loads in all directions, such as radial load and axial load.
Line contact on the raceway and roller construction provides rotational accuracy, high stability, and greater tilt stiffness.
The preloaded adjustable design extends bearing life, increases stiffness and provides minimum runout within limits.
The nylon spacer has a low inertia and a small running torque.
The parts are made of surface carburized steel or electroslag remelted bearing steel with good impact resistance.
Application:
Precision rotary indexing table vertical and horizontal boring machines for machine tools; vertical grinding machines; rotary surface grinding machines
Guns and radar turrets; large radio and optical telescopes; rotating cameras; steering pivots and casters height-limited pivots
Microscope table; rod center support shaft; rotary bogie; welded bracket; large oil tank mooring buoy; rotary assembly fixture
Industrial robot; precision rotary table; medical equipment; measuring instrument; manufacturing device
Type | Figure | Weight | Boundary Dimension | Rated loading | LimitingSpeed | Equivalent | ||||||||
Radial | Thrust | |||||||||||||
Static | Dynamic | Static | Dynamic | |||||||||||
KG | d | D | B | r | Cr(KN) | Co(KN) | Cr(KN) | Co(KN) | RPM | Timken | SKF | NACHI | ||
XRT 060-NT | 4 | 4.9 | 150 | 230 | 30 | 1 | 95.2 | 156 | 111 | 279 | 1100 | - | BF KB 353243/HA 4 | - |
XRT 063-NT | 4 | 5.15 | 160 | 240 | 30 | 1.1 | 96.8 | 162 | 118 | 300 | 1000 | - | BF KB 353240/HA 4 | - |
XRT 079-NT | 4 | 6.7 | 200 | 280 | 30 | 1.5 | 102 | 175 | 120 | 320 | 9000 | - | - | 200XRN 28 |
XR TO 80-NT | 4 | 5.59 | 203.2 | 279.4 | 31.75 | 1.5 | 110 | 188 | 134 | 348 | 850 | XR496051 | 616093A | - |
XRT 080-W | 1 | 5.59 | 203.2 | 279.4 | 31.75 | 1.5 | 110 | 188 | 134 | 348 | 850 | XR496052 | - | |
XRT 094-NT | 4 | 5.4 | 240 | 300 | 30 | 1 | 88 | 184 | 114 | 361 | 750 | - | BF KB 353203/HA 4 | - |
XRT 098-NT | 4 | 4.5 | 250 | 310 | 25 | 1 | 88 | 188 | 114 | 361 | 700 | - | BF KB 353212/HA 4 | - |
XRT 099-NT | 4 | 13 | 250 | 350 | 40 | 1.3 | 187 | 355 | 228 | 657 | 670 | - | BF KB 353215/HA 4 | 250XRN 35 |
XRT 110-NTL | 4 | 12.5 | 300 | 400 | 36.492 | 1.5 | 183 | 355 | 223 | 657 | 560 | J XR 637050 | - | - |
XRT 110-NT | 4 | 12.5 | 300 | 400 | 37 | 1.5 | 183 | 355 | 223 | 657 | 560 | XR637050 | 616094A | 300XRN 50 |
XRT 110-NF | 3 | 38 | 300 | 480 | 60 | 1.5 | 258 | 495 | 35 | 920 | 600 | J XR 678054 | - | - |
XRT 120-NT | 4 | 19.5 | 310 | 425 | 45 | 2.5 | 216 | 427 | 281 | 837 | 640 | J XR 652050 | BF KB 634097 | - |
XRT 130-NT | 4 | 32 | 330.2 | 457.2 | 63.5 | 3.3 | 264 | 515 | 312 | 954 | 620 | XR678052 | 615661A | - |
XRT 138-NT | 4 | 27 | 350 | 470 | 50 | 3.3 | 308 | 635 | 376 | 1180 | 560 | - | BF KB 353216/HA 4 | 350XRN 47 |
XRT 140-NT | 4 | 30 | 370 | 495 | 50 | 3.3 | 93.6 | - | 119 | - | 600 | J XR 699050 | - | - |
XRT 157-NT | 4 | 15 | 400 | 480 | 40 | 1.1 | 216 | 497 | 281 | 957 | 430 | - | BF KB 353224/HA 4 | - |
XRT 158-NT | 4 | 46.5 | 400 | 550 | 60 | 2.5 | 429 | 920 | 523 | 1700 | 400 | - | BF KB 353219/HA 4 | 400XRN 55 |
XRT 170-W | 1 | 27.5 | 432.003 | 571.5 | 38.1 | 3.3 | 435 | 910 | 530 | 1600 | 400 | XR736052 | - | - |
XRT 180-NT | 4 | 51 | 457.2 | 609.6 | 63.5 | 3.3 | 396 | 856 | 514 | 1680 | 420 | XR766051 | 615894A | 0457XRN 060 |
XRT 160-NT | 4 | 62 | 424.95 | 614.924 | 65 | 3.3 | 470 | 960 | 600 | 1720 | 380 | XR766052 | - | |
XRT 220-NT | 4 | 100 | 580 | 760 | 80 | 3.3 | 627 | 1380 | 765 | 2560 | 300 | XR820060 | 615662A | 580XRN 76 |
XRT 220-W | 1 | 100 | 580 | 760 | 80 | 6.4 | 627 | 1380 | 765 | 2560 | 300 | XR820061 | - | - |
XRT 230-NF | 4 | 148 | 600 | 830 | 80 | 6.4 | 680 | 1460 | 820 | 2870 | 300 | XR836050 | - | 600XRN 83 |
XRT 270-N | 2 | 150 | 685.8 | 914.4 | 79.375 | 6.4 | 693 | 1660 | 900 | 3250 | 260 | XR A 844050 | - | - |
XRT 270-NT | 4 | 150 | 685.8 | 914.4 | 79.375 | 3.3 | 693 | 1660 | 900 | 3250 | 260 | XR855053 | 615659A | 0685XRN 091 |
XRT 270-W | 1 | 150 | 685.8 | 914.4 | 79.375 | 3.3 | 693 | 1660 | 900 | 3250 | 260 | XR855056 | - | - |
XRT 350-W | 1 | 185 | 901.7 | 1117.6 | 82.555 | 3.3 | 781 | 2060 | 1060 | 4290 | 200 | XR882054 | - | - |
XRT 350-NT | 4 | 185 | 901.7 | 1117.6 | 82.555 | 3.3 | 781 | 2060 | 1060 | 4290 | 200 | XR882055 | 615895A | 0901XRN 112 |
XRT 370-N | 2 | 158 | 939.8 | 1117.6 | 82.55 | 3.3 | 920 | 2580 | 1200 | 5000 | 200 | XR882058 | - | - |
XRT 374-NT | 4 | 215 | 950 | 1170 | 85 | 3 | 968 | 2690 | 1310 | 5600 | 215 | - | BF KB 353251/HA 4 | - |
XRT 400-NT | 4 | 430 | 1028.7 | 1327.15 | 114.3 | 3.3 | 1230 | 3310 | 1600 | 6490 | 430 | XR889058 | BF KB 353282/HA 4 | 1028XRN 132 |
XRT 400-WL | 1 | 358 | 1028.7 | 1327.15 | 95.25 | 3.3 | 1060 | 3100 | 1420 | 6020 | 450 | XR889059 | - | - |
XRT 400-NF | 3 | 430 | 1028.7 | 1327.15 | 114.3 | 3.3 | 1230 | 3310 | 1600 | 6490 | 430 | XR889060 | - | - |
XRT 500-NT | 4 | 350 | 1270 | 1524 | 95.25 | 3.3 | 1300 | 3830 | 1760 | 2980 | 95 | 1.8 | 615897A | - |
XRT 610-NT | 4 | 500 | 1549.4 | 1828.8 | 101.6 | 3.3 | 1400 | 4510 | 1890 | 9400 | 80 | XR897051 | 615898A | - |
XRT 740-NT | 4 | 675 | 1879.6 | 2197.1 | 101.6 | 5.4 | 1510 | 5240 | 2040 | 10900 | 43 | - | 615899A | - |
XRT 1040-NT | 4 | 1130 | 2463.8 | 2819.4 | 114.3 | 5.4 | 2330 | 8740 | 3150 | 18200 | 19 | - | 634078A | |
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