What is Inch tapered roller bearings

The structure and assembly dimension precision and rotation precision of the Inch tapered roller bearings are different from that of the metric bearings. An industry that is used for import machinery or special needs. The British conical roller bearing is a cone roller bearing, which is measured in inches and in inches. It is derived from the British and American countries.
Structural form: single column diallel four columns

Basic Bearing No.	Nominal Bearing Dimensions					Preferred Shoulder Diameters
	d	D	T	B	C	R (min shaft fillet)	r (min shaft fillet)	da (min)	db (max)	Da (max)
	mm inch	mm inch	mm inch	mm inch	mm inch	mm inch	mm inch	mm inch	mm inch	mm inch
LM11749/ LM11710	17.4620	39.8780	13.8430	14.605	10.688	1.300	1.300	21.500	21.600	37.100
	0.6875	1.5700	0.5450	0.575	0.420	0.050	0.050	0.846	0.850	1.460
LM11949/	19.0500	45.2370	15.4940	16.6370	12.0650	1.300	1.300	23.500	23.600	41.400
LM11910	0.7500	1.7810	0.6100	0.6550	0.4750	0.050	0.050	0.925	0.930	1.630
M12649/	21.4300	50.0050	17.5260	18.2880	13.9700	1.300	1.300	25.500	25.400	46.000
M12610	0.8437	1.9687	0.6900	0.7200	0.5500	0.050	0.050	1.004	1.000	1.810
M12649A/	21.4300	50.0050	17.0261	17.7880	13.4700	1.300	1.300	25.500	25.400	46.000
M12610	0.8437	1.9687	0.6703	0.7000	0.5300	0.050	0.050	1.004	1.000	1.810
LM12749/	21.9860	45.2370	15.4940	16.6370	12.0650	1.300	1.300	27.500	25.900	41.400
LM12710	0.8656	1.7810	0.6100	0.6550	0.4750	0.050	0.050	1.183	1.020	1.630
LM12749/	21.9860	45.9740	15.4940	16.6370	12.0650	1.300	1.300	26.000	25.900	42.400
LM12711	0.8656	1.8100	0.6100	0.6550	0.4750	0.050	0.050	1.024	1.020	1.670
L44643/	25.4000	50.2920	14.2240	14.7320	10.6680	1.300	1.300	29.500	29.500	47.000
L44610	1.0000	1.9800	0.5600	0.5800	0.4200	0.050	0.050	1.161	1.160	1.850
L44649/	26.9880	50.2920	14.2240	14.7320	10.6680	3.500	1.300	31.000	31.000	47.000
L44610	1.0625	1.9800	0.5600	0.5800	0.4200	0.140	0.050	1.220	1.220	1.850
L45449/	29.0000	50.2920	14.2240	14.7320	10.6680	3.500	1.300	33.000	33.000	48.000
L45410	1.1417	1.9800	0.5600	0.5800	0.4200	0.140	0.050	1.299	1.300	1.890
LM67048/	31.7500	59.1310	15.8750	16.7640	11.8110	…	1.300	36.000	36.100	55.900
LM67010	1.2500	2.3280	0.6250	0.6600	0.4650	…	0.050	1.417	1.420	2.200
LM48548/	34.9250	65.0880	18.0340	18.2880	13.9700	…	1.300	40.000	39.900	61.000
LM48510	1.3750	2.5625	0.7100	0.7200	0.5500	…	0.050	1.575	1.570	2.400
L68149/	34.9880	59.1310	15.8750	16.7640	11.9380	…	1.300	45.500	39.100	55.900
L68110	1.3775	2.3280	0.6250	0.6600	0.4700	…	0.050	1.791	1.540	2.200
L68149/	34.9880	59.9740	15.8750	16.7640	11.9380	…	1.300	39.000	39.100	55.900
L68111	1.3775	2.3612	0.6250	0.6600	0.4700	…	0.050	1.535	1.540	2.200
JL69349/	38.0000	63.0000	17.0000	17.0000	13.5000	…	1.300	42.500	41.400	61.200
JL69310	1.4961	2.4803	0.6693	0.6693	0.5315	…	0.050	1.673	1.630	2.410
LM78349/	34.9880	61.9730	16.7000	17.0000	13.6000	…	1.500	46.000	40.000	54.000
LM78310	1.3775	2.4399	0.6575	0.6693	0.5354	…	0.059	1.811	1.575	2.126
JL68145/	34.9880	59.9740	15.8750	18.4610	11.9380	…	1.300	45.500	39.000	53.000
JL68111	1.3774	2.3612	0.6250	0.7268	0.4700	…	0.512	1.791	1.535	2.087
329013	29.0000 1.1417	50.2920 1.9800	14.2240 0.5600	17.6000 0.6929	10.6680 0.4200	3.500 0.138	1.3000 0.0512	39.500 1.555	33.000 1.299	44.500 1.752

NOTES:
1) These maximum fillet radii will be cleared by the bearing corners. 2) Minus value indicate center is inside cone backface. 3) Please refer to the picture above for the size of the leading angle marked with star.

Other Parameters

Equivalent bearing load dynamic: Pr= XFr + YFa

static: Por = 0.5Fr + YoFa When Por < Fr use Por = Fr For values of e, Y2 and Yo see the table below.

Basic Bearing No.	Basic Load Ratings		Effective load center	Constant	Axial load factors		Limiting Speeds (1000 RPM)		Bearing Weight (Approx.)
	Cr KN	Cor KN	a mm	e	Y2	Y0	Grease rpm	Oil rpm	Weight
									Ibs	kg
LM11749/ LM11710	23.8	24.2	5.1	0.29	2.10	1.15	10000	13000	0.185	0.084
LM11949/ LM11910	28.5	28.9	5.6	0.30	2.00	1.10	9000	12000	0.268	0.122
M12649/ M12610	38.5	40.0	6.4	0.28	2.16	1.19	8000	11000	0.372	0.169
M12649A/ M12610	37.6	40.8	6.4	0.28	2.16	1.19	8000	11000	0.360	0.163
LM12749/ LM12711	29.6	34.0	5.3	0.31	1.96	1.08	8500	11000	0.271	0.123
LM12749/ LM12711	29.6	34.0	5.3	0.31	1.96	1.08	8400	11000	0.271	0.123
L44643/ L44610	28.8	34.0	3.3	0.37	1.60	0.88	7400	10000	0.286	0.130
L44649/ L44610	28.8	34.0	3.3	0.37	1.60	0.88	7400	10000	0.264	0.120
L45449/ L45410	28.0	35.5	3.5	0.37	1.62	0.89	7200	9600	0.251	0.114
LM67048/ LM67010	34.5	41.5	3.8	0.41	1.46	0.80	6300	8500	0.400	0.182
LM48548/ LM48510	47.5	47.5	3.1	0.38	1.59	0.88	5700	7600	0.548	0.249
L68149/ L68110	35.5	47.5	2.5	0.42	1.44	0.79	6000	8000	0.385	0.175
L68149/ L68111	35.5	47.5	2.5	0.42	1.44	0.79	6100	8100	0.403	0.183
JL69349/ JL69310	38.5	52.5	2.3	0.42	1.44	0.79	5700	7600	0.436	0.198
LM78349/ LM78310	38.0	50.0	14.4	0.44	1.40	0.74	5600	8000	0.603	0.204
JL68145/ JL68111	35.0	47.0	13.2	0.42	1.40	0.79	6000	8000	0.406	0.184
329013	26.8	34.0	10.8	0.37	1.6	0.89	14000	17000	0.256	0.116

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