Product photo — see the table below for main specifications; non-standard designs welcome

Double Row Tapered Roller Bearings

Two roller rows share a common outer ring to take axial loads in both directions plus heavy radial loads. Factory-adjusted internal clearance makes installation simple — for machine-tool spindle rear supports, wheel axles and roll necks.

Category	Tapered Roller Bearings
Precision class	P0 / P6 / P5 (P4 for precision types)
Clearance group	C0 / C2 / C3 / C4 (by application)
Material	GCr15 high-carbon chromium steel / carburising steel (optional)
Heat treatment	Quenched & tempered, 58–64 HRC, dimensional stabilised
Standards	GB/T 307 / ISO 492 / JB-T (per product)

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Series note: Tapered roller bearings carry combined radial and axial loads, with the load transmitted along the roller contact angle for high efficiency. Single row types are matched in pairs for preset …

Main Specifications

Sample of common models (17 models in total — contact us for the full catalogue)

基本尺寸（mm）							基本额定载荷（KN）		Max.转速（r/min）		计算系数
d	D	T	B	C	r min	r1 min	Cr	Cor	Grease	Oil	e	Y1	Y2	Yo
40	70	70	19	64	1	0.3	93.5	152	3600	4800	0.38	1.78	2.65	1.74
40	73	55	27.5	55	4.2	0.8	90	162	3600	4800	0.4	1.69	2.52	1.65
40	80	45	22.5	44	2.5	1.5×15°	127	175	3600	4800	0.37	1.82	2.71	1.78
45	88	55	27.5	55	5.5	0.4	157	213	3500	4600	0.4	1.69	2.52	1.65
50	90	49	20	39	1.8	0.5	111	140	3400	4500	0.42	1.61	2.39	1.57
50	90	55	23	43.5	1.5	0.6	320	220	3400	4500	0.42	1.61	2.39	1.57
55	90	52	26	41	1.5	0.6	160	245	3300	4400	0.41	1.66	2.47	1.62
55	90	54	27	21	0.5	1.5	174	292	3300	4400	0.31	2.16	3.22	2.12
55	90	60	30	60	3.5	0.3	143	279	3300	4400	0.39	1.72	2.56	1.68
55	100	52	21	42	2	0.5	165	230	3300	4400	0.4	1.67	2.48	1.63

Double Row Tapered Roller Bearings

Double Row Tapered Roller Bearings

Main Specifications

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