Backing Bearings-Shandong Zhongqiao Bearing Co. Ltd

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Backing Bearings

Spherical Roller Bearings

Backing bearings are rolling bearings with an especially thick outer ring. They are installed in sets on a stationary shaft to function as support rollers. The pressure from the work roll is transmitted through the intermediate roll to the support rollers and then through the saddle system to the mill stand. They are generally used in multi-roll cold rolling mill equipment and may also be used in other applications such as straightening machines. Backing bearings are multi-row cylindrical roller bearings with very high precision requirements. In particular, after radial clearance is eliminated, the section height from the inner diameter to the outer diameter, known as the T value, is especially important and must be controlled within 0.005 mm on each shaft. This requires very high precision of bearing components. Backing bearings are specially used for multi-roll thin-strip mills, including the rolling of cold-rolled silicon steel sheets for the power industry, high-quality sheets for the automotive industry, coated sheets, stainless steel sheets and other high value-added thin sheets. This type of bearing directly functions as a support roll. Structurally, its outer ring wall thickness is much greater than that of ordinary bearings, and both radial runout of the outer diameter and the mutual difference in assembled wall thickness are extremely small. The bearing has a high dynamic load rating and can rotate with high precision under heavy loads.

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Product Details

Bearing code	NSK mode	Legend model	Main dimensions (mm)						Rated load		Outer diameter drum shape (mm)		Assemble thick wall(mm)	Mass (kg)
Bearing code	NSK mode	Legend model	d	D	B	C	r1	r2	KN	Kgf	a	f	H	Mass
BN2S31ZV	2S31Z-4	7	31.75	76.2	46.23	45.85	1	0.8	91	9300	-	-	22.2	1.2
BN3L50VP	3U50-1A	13	50	110	56	56	1.1	2	179	18200	6	0.01	29.98	3
BNS55V	S55-2	3	55	120	26	26	1.6	1.6	74.5	7600	-	-	32.5	1.6
BNS55VX2	S55-1	3	55	120	52.2	52	1.6	1.6	159	16200	7	0.01	32.5	3.4
BN3L70	3PL70-1	9	70	160	90	90	1.1	1.5	410	42000	6	0.026	45	10.7
BN3U9OP	sU90-1	12	90	220	120	120	1	2	655	67000	6	0.01	64.98	27.7
SJ-NNP90-2RS	-	16	90	220	96	94	3	3	494	-	-	-	65	21
BN3U9OPX2	3U90-4	12	-	220	130	130	1	2	680	69500	6	0.01	64.982	30
BN3L100	3PL100-1A	9	100	225	120	120	2	3	715	73000	8	0.093	62.47	28
SJ-NN100-2RS-1	-	15	99.995	225	120	120	1.5	1.5	625	-	-	-	62.474	26
BN3U120P	3U120-4	12	120	300	160	160	2.5	2.5	1180	120000	12	0.007	89.966	69.4
BN3L130	3PL130-2C	9	130	300	160	159.5	2	2	1470	150000	9	0.21	84.95	66.8
BN2S130/2RS	2L130-2E	6	130	300	160	159.5	2	7	1320	135000	9	0.21	84.95	62.8
BN2S130X2/2RS	2U130-16	6	130	300	172.64	170	2	2.5	1240	126000	50	0.009	84.95	71.2
BN3L130X2	3PL130-1C	9	130	300	172.64	172.64	2	5	1540	157000	10	0.131	84.95	72.4
BN3L130X2A	3PL130-1F	9	130	300	172.64	172.64	2	5	1540	157000	10	0.131	84.95	72.4
SJ-NNJ130-2RS	-	15	130	300	172.644	172.644	4	3.5	1320	-	-	-	84.955	70
BN2S179Z/2RS	2U179Z-3	6	179.984	406.4	224	220.66	3	3.3	1950	199000	15.9	0.093	113.205	166
BN3L180	3PL180-3	9	180	406.42	171.04	171.04	2.1	5	2060	210000	25	0.145	113.155	130
SJ-NNJ180-2RS	-	15	180	406.42	171.04	171.04	4	3	1550	-	-	-	113.155	121

Factory Display

We offer a complete range of bearings, including deep groove ball bearings, self-aligning roller bearings, tapered roller bearings, cylindrical roller bearings, angular contact ball bearings, thrust bearings, insert bearings, needle roller bearings, non-standard special bearings and related components.With complete models and specifications, our products are widely used in engineering machinery, mining & metallurgy, automobiles, agricultural machinery, motors, pumps, wind power, machine tools, textile machinery and other fields, suitable for high-speed, heavy-duty, high-temperature, corrosive and other harsh working conditions.

faq

Q: Are you a factory or trading company?

A: We are Shandong Zhongqiao Bearing Co., Ltd., located in Linqing, Liaocheng, Shandong Province. We are a professional bearing manufacturer with independent production lines, R&D, and quality control systems, supporting OEM/ODM customization and mass production.

Q: What types of bearings do you produce?

A: We provide full-range bearings, including deep groove ball bearings, self-aligning roller bearings, tapered roller bearings, cylindrical roller bearings, angular contact ball bearings, thrust bearings, insert bearings, needle bearings, and non-standard special bearings with complete models.

Q: What quality standards and certifications do you have?

A: We strictly follow ISO 9001 and IATF 16949 quality systems. Our products meet international standards such as GB, DIN, ANSI, and JIS. Full-process inspection ensures precision, wear resistance, service life, and stability.

Q: Do you accept customization? What is your MOQ?

A: We support OEM/ODM customization according to drawings, sizes, materials, and working conditions. MOQ is flexible for standard bearings and negotiable for non-standard items. Samples, small batches, and mass orders are all accepted.

Q: What about delivery time, packaging, and shipping?

A: Standard stock ships within 3–7 days, while customized products require 15–30 days. We support standard industrial packaging, neutral packaging, and customer-branded packaging. Sea, air, and international express shipping are available for global delivery.

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