What Are Our Concerns About Bearings（42）

Q1:What are the typical mechanisms for bearing devices?

A:Cylindrical roller bearing, deep groove ball bearing, self-aligning roller bearing, self-aligning ball bearing, needle roller bearing, spiral roller bearing, Angular contact ball bearing, tapered roller bearing, thrust ball bearing, angular contact ball bearing, thrust tapered roller bearing, thrust self-aligning roller bearing,  Combined bearing, outer spherical ball bearing, outer spherical ball bearing with seat, rotary bearing, linear motion rolling bearing, joint bearing, plain bearing (bearing bush), outer spherical bearing seat, oil-free bearing, air bearing, etc  

Q2：What is the model of bearing 3205 2RS? So what does 2RS mean?

A:3205 is a new code of domestic name is 3056205 belong to six types of angular contact ball bearings 2RS is double sealant cover.  

Q3:What does the bearing suffix GS mean?

A:SKF bearing prefix number (prefix) and its meaning GS — thrust cylindrical roller, thrust needle roller bearing ring.  Example: GS81107- seat ring of thrust cylindrical roller bearing 81107.  K — thrust roller and cage assembly.  Example: K81170.  K- – Inch tapered roller bearings with inner ring (inner cone) or outer ring (cone ring) with roller and cage assembly in accordance with AFBMA standard series.  

Example: K-09067 — inner cone of tapered roller bearing series 09000.  L — Single inner or outer ring of separated bearing.  Example: INNER ring of cylindrical roller bearing NU207.  Single row angular contact ball bearing ACD — contact Angle is 25 degrees.  B — Contact Angle is 40 degrees.  CC — Contact Angle is 12 degrees.  Self-aligning roller bearings CAC, ECAC, CA, ECA — These are designed for large size bearings with symmetrical rollers.  

Both sides of the inner ring are provided with fixed guard edges, and the inner ring is blocked in the activity.  The cage is a solid brass or steel frame.  CAC and ECAC bearing roller and raceway surfaces are optimized to facilitate the roller and reduce friction.  ECAC type with stiffener roller for increased load capacity.  -2F — External spherical ball bearing with dust rejection rings on both sides.  External spherical ball bearing with combined dust rejection rings on both sides.  G — Universal matching single row angular contact ball bearings.  

When the bearings are arranged face to face or back to back, there is a certain pre-load before installation.  GA — Face to face, back to back arrangement, there is a lighter preload in the bearing.  GB — Face to face, back to back arrangement, bearing with medium preload.  GC — Face to face, back to back arrangement, there is a heavy preload in the bearing.  K — Conical hole, taper 1:12.  K30 — Conical hole, taper 1:30.  

Q4:Where are human-oriented tapered roller bearings mainly used?

A:In general, fault identification of bearings is carried out by working temperature. Coarse and medium rolling mills use four rows of tapered roller bearings, finishing mills use double rows of cylindrical roller bearings, horizontal rolling mills and plumb rolling mills use the same type of bearings.  

No matter four row tapered roller bearings or double row cylindrical roller bearings, their basic structure is similar to the traditional rolling mill bearings. If the bearings have the defects described below, they can no longer be used. However, the design of each part takes lubrication and heat dissipation into full consideration.  

That is, the inner ring, outer ring, separate ring (for four rows of tapered roller bearings), cage, roller (for double row of cylindrical roller bearings) have many slots, holes, etc.  In this way, the lubrication formed by grooves and holes, the heat dissipation channel and the bearing seat, the production pattern of Japanese bearing enterprises and the channel on the high quality roller constitute a reliable lubrication and heat dissipation system, coupled with a good sealing device, so that the bearing can run in a stable place in the high speed and high pressure state.  

Although the high line rolling mill bearings provided by various manufacturers have different design styles, they all have one thing in common. The main reason for the high operating temperature of extension bearings is that the inner ring wall thickness is thicker than that of ordinary bearings of the same specifications, and the outer ring is thinner.