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
BN3L180X3	3PL180-1B	9	180	406.4	217	217	2.1	2.5	2550	260000	10	0.058	113.16	165
BN3U18OP	3U180-2	12	180	406.4	224	220	2.1	2.5	2050	209000	10	0.058	113.16	167
SJ-NNJ180-2RS-1	-	15	179.984	406.43	224.25	220	4	3	1870	-	-	-	113.181	150
BN3L180X3-1	3PL180-2	9	180	406.42	224	224	2.1	2.5	2610	266000	10	0.058	113.21	171
BN3L205P-1	-	11	205	520	200	216	3	3	3190	325500	18	0.105	157.5	277

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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