|Seal Type:||Double Shields||Weight(kg):||0.1|
|Limiting Speed:||5600 R/min||Material:||GCr15/AISI52100/100Cr6|
full complement ball bearing,
radial roller bearing
Needle Roller Bearings NA 4906.2RS NA 4908.2RS With Machined Rings And Inner Ring
|ID*OD*W (mm)||30X 47 X 18 mm|
|Seal type||double shields|
|Lead time||Stock or 15-30days|
|Limiting speed||5600 r/min|
|Vibration Level||V1, V2, V3, V4|
|Grease||Mobil polyrex EM,Kyodo Yushi SRL|
|Payment terms||T/T, L/C|
A full load of needle roller bearings is installed, usually by using an auxiliary sleeve for needle roller bearings. At this time, the auxiliary roller or auxiliary sleeve supports the needle roller to prevent the needle roller from falling out, and the shaft neck lifts the needle roller with its own chamfering Angle. With the needle roller bearing moving slowly inward on the shaft neck, the auxiliary roller or auxiliary sleeve will slowly withdraw until it is installed to the working position. The outer diameter of the auxiliary roller and auxiliary sleeve should be 0.1 -- 0.3mm smaller than the shaft diameter. When installation, the surface coated with grease inside the bearing outer ring first, against the tight inner surface needle: (in the last one should be gaps), then replace the shaft neck of the roller bearing inner ring or auxiliary sleeve into the outer ring hole, and make it face alignment installed shaft end face or installed on the shaft bearing inner ring end face, and then use pressure on the press or hammer knock. Needle roller bearings can also be installed in this way, that is, the auxiliary sleeve outside diameter coated with a thin layer of lubricating oil, inserted into the bearing ring, so that the auxiliary sleeve and the bearing ring constitute a ring hole, and then in the ring hole installed needle rolling. After the needle is loaded, push out the auxiliary sleeve with the work shaft. For needle roller bearings without an inner ring or outer ring, in the installation, the rolling surface of the shaft or shell hole can be first coated with a thin layer of grease, and the roller needle in turn close to the grease on the installation site. When sticking the last needle roller, there should be a gap. The gap size should be 0.5mm on the circumference of the needle roller bearing. Do not squeeze the last needle in, or less than a needle, because the hard squeeze, the bearing will be stuck unable to rotate; When less loading, the clearance is too large, easy to cause the bearing running needle torsion pendulum and broken. For the needle roller bearing only with stamping outer ring, because the outer ring wall is very thin, the non-needle roller bearing should be installed by the hammer, the press should be used. Because of the hammer, the pressure is not uniform, easy to cause the needle roller bearing ring local deformation.
We have a complete process for the production and quality assurance to make sure our products can meet your requirement. And our quality can compare with the most Chinese famous bearing manufacture. we have the same technology. Such as
1 . Assembly
2 . Windage test
3 . Cleaning
4 . Rotary test
5 . Greasing and gland
6 . Noise inspection
7 . Appearance inspection
8 . Rust prevention
9 . Product package
1: T/T: 30% as deposit and 70% balance after getting a copy of B/L.
2: L/C (cannot for branded bearings.)
3: Discuss together between buyer and supplier.
Dear friend, any questions please feel free to contact us, let's learn and grow together in bearing worlds!
Contact Person: tiffany