Double-Row. Type TDIT

Tapered roller bearings

Double-Row. Type TDIT

Tapered double inner, tapered double outer (TDIT) bearings are a specific configuration of double-row tapered roller bearings designed to accommodate radial and axial loads in both directions. The TDIT design includes two inner rings (cones) mounted on the shaft, two double cups on the outer part of the bearing, and tapered rollers positioned between them.

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Parameter

part Number		Bearing Dimensions					Load Ratings	Bearing weight
Inner	outer						Load Ratings
						Double
		Bore d	Taper	0.D. D	width T	Inner Ring width B
							Dynamic（1)

		mm in.	mm in.		mm in.	mm in.	N lbf	kg lbs.
19146TD	19283	37.037 1:19.2 72.000 39.096 38.100					83400	0.71 1.58
		1.4581 2.8346 1.5392 1.5000					18700
688TD	672	100.211 1:19.2 168.275 95.250 95.250					435000	8.38 18.46
		3.9453 6.6250 3.7500 3.7500					97800
HH221449TD	HH221410	101.600 1:12 190.500 117.475 127.000					878000	14.90 32.87
		4.0000 7.5000 4.6250 5.0000					197000
71457TD	71750	115.888 1:19.2 190.500 107.950 111.125					598000	12.08 26.63
		4.5625 7.5000 4.2500 4.3750					134000
H242649TD	H242610	206.375 1:12 336.550 180.975 184.150					2230000	49.31 108.74
		8.1250 13.2500 7.1250 7.2500					501000
93826TD	93125	209.550 1:12 317.500 184.150 184.150					1200000	45.37 100.05
		8.2500 12.5000 7.2500 7.2500					270000
LM742746TD	LM742710	214.973 1:12 285.750 92.075 92.075					707000	16.00 35.25
		8.4635 11.2500 3.6250 3.6250					159000
H244848TD	H244810	219.075 1:12 358.775 196.850 200.025					2520000	83.34 183.74
		8.6250 14.1250 7.7500 7.8750					566000
M244246TD	M244210	219.936 1:12 314.325 115.888 123.822					1210000	31.68 69.85
		8.6589 12.3750 4.5625 4.8749					272000
EE130926TD	131400	234.950 1:12 355.600 165.100 165.100					1390000	51.55 113.66
		9.2500 14.0000 6.5000 6.5000					312000
EE130927TD	131400	234.950 1:12 355.600 184.150 184.150					1390000	54.20 119.51
		9.2500 14.0000 7.2500 7.2500					312000
LM247747TD	LM247710	243.152 1:12 327.025 92.075 101.600					987000	23.70 52.24
		9.5729 12.8750 3.6250 4.0000					222000
M249746TD	M249710	252.412 1:12 358.775 130.175 139.700					1590000	45.97 101.36
		9.9375 14.1250 5.1250 5.5000					358000
EE221039TD	221575	263.525 1:12 400.050 196.847 192.088					1440000	70.69 155.85
		10.3750 15.7500 7.7499 7.5625					324000
LM451349TD	LM451310	266.700 1:12 355.600 107.950 109.538					1400000	30.99 68.32
		10.5000 14.0000 4.2500 4.3125					315000
M252349TD	M252310	269.875 1:12 381.000 136.525 136.525					2000000	50.82 112.03
		10.6250 15.0000 5.3750 5.3750					450000
EE128113TD	128161	280.000 1:12 409.981 206.375 206.375					1510000	78.15 172.27
		11.0236 16.1410 8.1250 8.1250					340000
M255449TD	M255410	288.925 1:12 406.400 144.462 144.462					2070000	62.40 137.58
		11.3750 16.0000 5.6875 5.6875					466000
LM757043TD	LM757010	295.275 1:12 406.400 203.200 203.200					1340000	72.69 160.24
		11.6250 16.0000 8.0000 8.0000					301000
HM256846TD	HM256810	297.523 1:12 422.275 150.812 160.338					2260000	76.21 168.01
		11.7135 16.6250 5.9375 6.3125					508000
HH258249TD	HH258210	303.212 1:12 495.300 263.525 263.525					5000000	224.54 495.02
		11.9375 19.5000 10.3750 10.3750					1120000
NP868174	329172	304.655 1:12 438.048 131.762 131.762					1880000	65.38 144.13
		11.9943 17.2460 5.1875 5.1875					422000
HM259045TD	HM259010	316.111 1:12 447.675 157.429 173.035					2920000	89.79 197.96
		12.4453 17.6250 6.1980 6.8124					656000
HM265032TD	HM265010	333.375 1:12 523.875 185.738 185.738					3960000	166.14 366.28
		13.1250 20.6250 7.3125 7.3125					890000
HM261049TD	HM261010	333.375 1:12 469.900 166.688 166.688					2780000	97.71 215.41
		13.1250 18.5000 6.5625 6.5625					626000
HM262749TD	HM262710	346.075 1:12 488.950 174.625 174.625					3010000	115.19 253.98
		13.6250 19.2500 6.8750 6.8750					676000
M262448TD	M262410	347.662 1:12 469.900 228.600 228.600					2490000	100.23 220.99
		13.6875 18.5000 9.0000 9.0000					561000
LM263145TD	LM263110	349.250 1:12 457.200 120.650 120.650					1640000	55.07 121.39
		13.7500 18.0000 4.7500 4.7500					368000
HM265049TD	HM265010	368.300 1:12 523.875 185.738 185.738					3960000	141.40 311.73
		14.5000 20.6250 7.3125 7.3125					890000
HM266449TD	HM266410	384.175 1:12 546.100 193.675 193.675					4290000	157.92 348.16
		15.1250 21.5000 7.6250 7.6250					963000
M268743TD	M268710	406.400 1:12 590.550 209.550 209.550					4970000	214.22 472.24
		16.0000 23.2500 8.2500 8.2500					1120000
M268749TD	M268710	415.925 1:12 590.550 209.550 209.550					4970000	198.81 438.27
		16.3750 23.2500 8.2500 8.2500					1120000
LM769349TD	LM769310	431.800 1:12 571.500 161.925 161.925					3320000	119.48 263.42
		17.0000 22.5000 6.3750 6.3750					747000
M270749TD	M270710	447.675 1:12 635.000 223.838 223.838					5700000	245.12 540.38
		17.6250 25.0000 8.8125 8.8125					1280000

Introduction

Inner Rings (Cones): TDIT bearings have two inner rings, or cones, each mounted on the rotating shaft. These cones have inner raceway surfaces for the tapered rollers.
Outer Cups: The outer part of the bearing consists of two double cups, providing outer raceway surfaces for the tapered rollers.
Tapered Rollers: Positioned between the inner and outer components, the tapered rollers facilitate the bearing’s ability to support both radial and axial loads.

The TDIT configuration is particularly suitable for applications where axial loads need to be accommodated in both directions. This type of bearing is commonly used in heavy machinery, industrial gearboxes, and other applications where higher load-carrying capacities and increased rigidity are essential.

When selecting and using TDIT bearings, it’s crucial to consider factors such as load capacity, speed, and specific application requirements to ensure optimal performance and reliability. Regular maintenance, proper installation, and adequate lubrication are also vital for extending the bearing’s service life.

TDIT bearings provide versatility and efficiency in applications requiring robust performance under demanding conditions, making them suitable for various industrial sectors.

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Tapered roller bearings

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