Rolling mill bearings

Customizable

Standards：GOST/ASTM/GB
Inner diameter (ID)：35mm-200mm
Outer diameter (OD)：80mm-320mm
Weight：3.6kg-15kg
Structures：outer ring, inner ring and cage
Applications：Cold rolling mill、Strip rolling mill、Seamless tube rolling mill

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QIBR Model Selection
QIBR Customized Bearing
QIBR Process Control
QIBR Sort and Grade

Designation	Bearing Model	Dimension(mm)			Weight
Designation	Bearing Model	d	D	B	_
162250B	N 140-106	200	320	48	15
162250C	7226 PD-9/6B	130	230	80	14.5
162250D	N 128-107	140	220	36	5.3
162250E	7224 PD-9/6B	120	215	80	12.4
162250F	N 1024	120	180	28	2.8
162250G	N 126 KC10/7	130	200	33	3.6
162250GA	N 126 KC11/8	130	200	33	3.6
162250H	N 312 C4/2	60	130	31	1.9
162250HA	N 312 C5/3	60	130	31	1.9
162250J	7310 PD7/5B	50	110	54	2.5
162250K	309 RD9/6B	45	100	50	1.9
162250KA	309S 34/26	45	100	25	1
162250L	7208 PD5/4F	40	80	36	0.8
162250LA	7309 PD7/5F	40	100	50	2.1
162250MA	5J311Y	50	120	49.213	2.8
162250MB	7310 PD8S	50	110	54	2.5
162250S	N134-104	170	265	42	8.3
162250U	134 KS	170	260	42	8.4
162250V	N 228	140	250	42	8.7
162250W	6228	140	250	42	9.1
162250X	9128 KS2	140	210	33	4.1
162250A	7334 PD-1B	170	360	144	72
162250GB	N 126 KC9/6	130	200	33	3.6
162250GC	NR126 KC6/4	130	200	46	5.1
162250HB	NR312 KC11/7	60	130	46	3
162250HI	NU 1211 C	50	100	27	0.9
162250JA	7311 PD6/3B	55	120	58	3.2
162250LB	7307 PD8/4F	35	80	42	1
162250Y	7126 KRD4/2S	130	200	33	3.8

QIBR mill bearing are mainly used in rolling mill equipment for a variety of rolling bearings, mainly for the rolling industry, namely rolling of non-ferrous metals, ferrous metals and non-metal products. It is used for rolling bearings at the roll and drum.

Raw material

QIBR precision anti-friction bearings are usually made of chrome steel, which consist of about 1% carbon, 1.5% chromium and a small amount of manganese, silicon, and sometimes a small amount of molybdenum.

QIBR offers you a wide range of material options such as GCr15, 100Cr6, SKF 3, SUJ-2 etc. At the same time, some models of QIBR are available in stainless steel.

The rolling element can be ceramic ball (silicon nitride). Due to ceramic is kind of special material, the ceramic ball bearing has advantages of higher rotation speed, good self-lubricating property, and the rigidity is 15%-20% higher than the general bearing, and better high temperature resistance.

Bearing cage

The high-quality cage used by QIBR bearings ensure that the rollers and balls are evenly distributed in the bearing rings and can be rotated properly.

The cage is divided into stamped cage, brass solid cage, reinforced nylon 66 etc. Bearing cages that operate under high temperature or harsh conditions are recommended to use steel cages or brass solid cages. QIBR offers a wide range of advice and options depending on the operating conditions.

Type of lubrication

Lubricating oil is the basic lubricant for ball bearings. Previously most of the lubricating oil was extracted from petroleum. Synthetic oils are now acceptable due to improved performance, such as two lipid synthetic oils, silicones and fluorocarbon synthetic oils. In general, lipid synthetic oils have better low temperature properties, lower volatility, and better temperature characteristics and viscosity compared than petroleum refined oils. Essentially all lubricants contain additives to inhibit chemical changes, prevent metal corrosion, and improve physical properties (antifoam, etc.).

The silicone and fluorocarbon synthetic oils that adopted by QIBR have lower volatility and wider temperature/viscosity characteristics.

Radial clearance

The radial clearance is the gap between the steel ball and the ring. QIBR are able to tailor to you based on temperature conditions, interference fit, and misalignment of the bearing axis, required noise level and speed.

Service life and the rated load

The bearing life is the number of bearing rotations before the fatigue occurs on the ring or any rolling element (or the rotation time at a constant speed). However, the same set of bearings will not necessarily have the same life under the same conditions. In this case, the rated life is the number of rotations that 90% of the bearings in this group can reach or exceed before bearing weariness (or the rotation time at a constant speed). The service life of QIBR series bearings are 5%-8% longer than other bearings of the same model, through strict production process, high standard material selection, precision control.

Conversion table of bearing ball material
Bearing steel ball material comparison table
GB (China)	Gcr15	GCr15SiMn
ASTM/AISI (USA)	52100	*
ГОСТ(Russia)	ШX15	ШX15CГ
BS (UK)	534A99	*
JIS (Japan)	SUJ2	SUJ3
NF (France)	100C6	100CrMn6
VDEh (Germany)	100Cr6 (1.3505)	1.352
Level of rollers	G1, G1A, G2, G2A, G3, G5

Rolling mill bearing products commonly includes deep groove ball bearings, angular contact ball bearings, spherical roller bearings, four-row cylindrical roller bearings, tapered roller bearings and split bearings.