We insist on technological innovation, which helps us to improve the quality of our Chrome Steel Contact Ball Bearing, Deep Groove Ball Bearing 2 Buyers, Spherical Roller Bearing Used in engineering machinery. We hope to organically combine training with staff growth and effectively promote the development of all employees. We have the ability to develop products independently so that we can get new products according to customer needs to ensure that the quality of products meets customer requirements.
NA6917-ZW is a needle bearing
main size: 85mm*120mm*63mm, dynamic load: 188000N,
static load: 400000N, limit speed: 4600 1/min,
reference speed: 2850 1/min, weight: 2200kg, axial displacement : 1mm
Needle roller bearings NA6917-ZW, dimension series 69, features: radial load,
without seals, grease lubrication, oil lubrication, compact design
NA6917-ZW bearing application range
Paper Machinery Injection Molding Machine Motorcycle Vacuum Pump and Compressor Sander Polisher Centerless
Grinder Crankshaft Grinder Planer
Needle bearings are important components in mechanical equipment.
Its main function is to support the mechanical torsion body to reduce the mechanical load friction coefficient of the equipment in the transmission
process. According to different load deflection or nominal contact angle, needle roller bearings are divided into radial needle roller bearings and
thrust bearings. According to the variety of rotating elements, they are: ball bearings and rolling bearings. According to whether the needle roller
bearings can be aligned, they can be self-aligning bearings and non-aligning bearings (rigid needle roller bearings). 
According to the number of rows of the rotating body, it is respectively: single-row needle roller bearings, double-row needle roller bearings
and multi-row needle roller bearings. According to whether the parts can be peeled off, they can be divided into: clutchable pressure plate
and non-clutchable bearing. In addition, it is classified and managed according to the layout characteristics, styles and dimensions.
What are the classifications of needle roller bearings?
1) Centripetal needle roller and cage assembly
2) RNA, NKI type needle roller bearings
3) RNA and NK needle roller bearings without inner ring
4) HK type drawn outer ring needle roller bearing
5) BK type drawn outer ring needle roller bearing
The drawn cup needle roller bearings installed on the shaft end have double-sided open type (1) and single-sided closed type (2). The base end face of the closed drawn outer ring can withstand low axial guiding forces.
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