The processing requirements for the shaft or seat hole are higher, to prevent relative deflection, so as to avoid contact stress concentration.

Cylindrical roller bearing rolling elements are cylindrical rollers .This type of bearing is divided into different structural types such as single-row, double-row and four-row cylindrical roller bearings according to the number of rows of rollers installed. Cylindrical roller bearings can be divided into NU, NJ, NUP, N, NF type single-row cylindrical roller bearings and NNU, NN type double-row cylindrical roller bearings according to whether the rings have ribs or not.



Double row cylindrical roller bearings are floating bearings and have two structures: cylindrical inner hole and tapered inner hole (bearing rear code plus K). This type of bearing has the advantages of compact structure, high rigidity, large bearing capacity, and small deformation after being loaded, and is especially suitable for the support of machine tool spindles. The conical inner hole can also play the role of micro-adjustment of the clearance, and can simplify the structure of the positioning device and facilitate installation and disassembly.

NN type : the outer ring have no ribs, the inner ring has ribs on both sides, and there is a middle rib in the middle.Displacement in two directions in the axial direction between the shaft and the bearing housing can be allowed.
NNU type: have ribs on both sides of the outer ring and a middle rib in the middle, and no ribs on the inner ring. Displacement in two directions in the axial direction between the shaft and the bearing housing can be allowed.



Advantages
Long life/ High load carrying capacity / Long service life / Low friction

Large and medium-sized electric motors, rolling stock, machine tool spindles, internal combustion engines, generators, gas turbines, gearboxes, rolling mills, vibrating screens, and hoisting and transporting machinery, etc.

Shandong Alin Machinery Co., Ltd, Renhe High-precision Bearings Co., Ltd belongs to Alin group. It is located in Industrial Development Zone of Liao-cheng city, which is bearings manufacturing base in China. We have been specialized in the production of auto   parts, bearings and retainers since year 1986.

Our factory covers an area of 120,000 sq.m, with a construction area of 66,000 sq.m. There are more than 600 employees, 50 management personnel, 80 technical engineers and 60 quality inspectors.   We are famous   manufacturer group for our strict quality control system and hard-working team.

There are more than 40 sets of high-precision mold processing equipment, 150 sets of various CNC lathes, 200 sets of white dynamic grinding machines, 120 sets of stamping equipment, 16 sets of special demagnetization machines, 10 sets of high-pressure spray cleaning machines, 6 sets ultrasonic cleaning machines and 6 automatic bearing grinding lines.   They are also equipped with advanced hardness tester, length measuring instrument, sine instrument, spectrometer, infrared carbon and sulfur analyzer, Vickers hardness tester, roughness profiler, electronic tensile testing machine, metallographic microscope, projection coordinate instrument, roundness instrument, ABLT-2 life testing machine, three-coordinate testing machine and so on. We are ready to provide customers with high-quality precision bearing   products.

Our company passed ISO9001, ISO/TS16949 and IATF16949 quality management system. Our products are CE / SGS certified. Through introducing world-leading technology and bring together domestic high-tech talents, it ensures our rapid growth and competitive advantages.

Sincerely wish you visit our factory!

Q1: Do you provide samples? Is it free or extra?

Yes, we can provide a small amount of free samples. Do you mind paying the freight?

Q2: Can you accept OEM or non-standard Bearings ?

Any requirement for non-standard roller bearings is easily fulfilled by us due to our engineers' rich experience.

Q3: What is your latest delivery time?

Most orders will be shipped within 7-15 days of payment  received.

Q4:Does your company have quality assurance?

Yes, for 2 years.

Q5:Which payment method does your company support?

T/T is best, but we can also accept L/C.

Q6:How to contact us quickly?

Please send us an inquiry or message and leave your other contact information, such as phone number, whatsapp or wechat account, we will contact you as soon as possible and provide the detailed information.