Hello everyone, today I’m going to introduce the specifications of bearing types The main thing today is to bring everyone in How to understand the bearing Have you heard of bearings Or do you know what the bearing is for? And the bearing has so many specifications How do we distinguish it This is the main thing today Introduce you in an introductory way Because there are so many types of bearings Today is to introduce a few more common Often used to tell everyone I will explain in detail later Ways to distinguish species And we started bearing The most important thing is that ball bearings are the most commonly used I will use this ball bearing To introduce the main structure of the bearing And what is the role Then let's keep watching
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First let's understand
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What is a bearing?
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Actually bearings are used in our lives
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Is very broad Maybe you didn't find it Some places are exposed Some places may be hidden inside the object Like a locomotive car Or motor Electric fan Fingertip Spinner Or sports equipment in the park, etc. Something like this may have bearings inside In terms of ball bearings Is the most widely seen Generally if we want to learn I will introduce ball bearings first Bearings are mainly used for high-speed rotation When there is a rotational movement Used for transmission Let's first understand what its structure is First I will divide it into three parts The first one is the outer ring Place of bearing outer ring The second is the inner ring This place Next is the ball and retainer The place of the ball is to make the inner ring and outer ring Can do rolling The main function of the retainer is to let The ball can stay in this position After combining Becomes a ball bearing The most important thing is to assemble it with this structure Of course, inside the ball Some lubricating oil So when the outer ring and inner ring rotate The ball will roll with it And there will be lube inside To keep it smooth So generally such bearings There will be several forms Like this is one of them Without any capping Like this place we see balls There are also two One is the iron cover One is a plastic cover It seals up this place There is a lid to cover this place It can prevent dust Secondly, it can keep the lubricating oil inside Mainly for this role Everyone here to find out For bearings, ball bearings We often use Usually used as a pair Usually this outer ring will be fixed on Peilin seat Or on the five-way pipe Usually it puts one on each side The middle inner ring is where the mandrel is connected The spindle will do high-speed rotation or rotational motion This way the rotation will be smoother It does two purposes This way it can maintain its level And the bearing needs to withstand radial forces Because ball bearings mainly bear radial forces If you don’t use two, it will produce axial force Bearings are easy to damage If you want to bear the axial force We are more common is the thrust bearing I will explain later Although there are some ball bearings, it has a slope May be able to withstand some axial forces Partial axial force I won’t discuss too much here Mainly let us understand Generally, ball bearings cannot withstand axial force Is easy to break So we generally use radial force to bear Usually like a gearbox Or bicycles, etc. Or motor It is also used as a pair This will be better withstand Life will be longer It runs smoothly and stable Let everyone know about it here Let's introduce the classification of bearing types The first one is the ball bearing Just introduced in the previous unit The resolution of ball bearings is Let's see that the beads inside are balls It is directly called a ball bearing There are totally divided into inner ring, outer ring, cage ball Here its specifications Generally it may be called 608 6001 6002 6203, wait for this name 6 series is called like this Of course there are other series Because this is an introductory article, the specifications are not discussed Bearings will have some models and specifications There will also be different labels Usually such specifications are standard products We can all buy it Its inner diameter, outer diameter and thickness are fixed Here is the way to distinguish it The rolling beads here are called rolling balls So it is made as a ball bearing Let everyone know about it here The next thing to introduce is the thrust bearing Here is what was introduced in the last unit Ball bearings have no way to withstand the axial force The thrust bearing is intended to It can bear the axial force Its structure here is It has balls and retainers This looks like this It has upper and lower covers, after the upper and lower covers are combined Just become like this So when assembling, it is pressed together like this So in this way it can bear the axial force The discrimination method is very clear here The purpose of the thrust bearing is to say Thrust is to bear the axial force It is distinguished because it is three Divided into three parts, so when assembling The three are separate It’s not like the ball bearing is integrally formed So this way to distinguish it Although it is also ball-shaped here But its use is like this It’s a three-layer sandwich like a burger This is a thrust bearing Thrust bearings have many specifications Don't discuss it here Mainly to understand its structure and usage Let everyone refer to it here Next, I will introduce needle bearings Needle roller bearings are also very distinguishable We see the scrolling object It's a needle-shaped thing So it’s called a needle bearing There are also several places here The first one is the outer ring Next is the needle and retainer After being combined, it becomes a needle bearing Some needle roller bearings have inner rings The intention of the inner ring is It saves you from worrying about its tolerance Because the needle bearing part The tolerance precision it requires is very high If you have a circle here, the roundness of the mandrel is not well done Cylindricity or roughness is not well done The shaking or smoothness of turning Will become very bad So here are some with inner ring This will make it easier to assemble And some needle roller bearings are simply needle rollers and retainers This is meant to let you The outside place is like a bearing hole Or the spindles are free to match The precision here is of course relatively high Here to see how you process and choose Part is a needle roller bearing with a thrust This is the thrust bearing introduced in conjunction with just now There will also be needle-shaped This side is a needle roller thrust bearing Let everyone refer to and get to know The next thing to introduce is the roller bearing The long shape of the roller bearing is the needle roller bearing it's the same How can these two distinguish it? We can tell the difference from a roller pin or a roller Generally if this place is relatively small Relatively slender That is the needle bearing If it's rounder and bigger We will call it a roller bearing Mainly use this size to distinguish it Roller bearings are equally divided The outer ring, inner ring, and roller cage are combined So usually the outer ring and the retainer Are combined The inner ring can be separated It is usually combined in this way So we will find Its inner ring will do axial movement There is no way to limit it So pay attention to it when assembling How do we limit this inner ring Of course some have flanged surfaces The flange face it will look like this Let me show you It will lean against the edge of this roller But not here either Assembled too tightly This way the rollers will be restricted It will turn more difficult So here in the design and assembly I have to imagine it, I have to figure it out There is of course another kind of slope This is called a tapered roller bearing Let’s take a look at this and cut it apart We can reach from here The roller is inclined at an angle This way its endurance will be better Here is the flange face just mentioned This side has a flange surface that can be slightly removed Let this axis limit it Otherwise, if there are no restrictions Here the inner ring will follow Let everyone know and refer to here The next thing to introduce is the linear bearing Linear bearings are also very common bearing types It's easy to distinguish We can see that it is a cylindrical shape There are a lot of inside Straight ball In this way it is a linear bearing We can read it literally and clearly It is mainly to make a linear motion Of course, besides linear motion, it will also rotate a bit It's all ok Roughly looks like this Cut it open slightly Here it is also an inner ring The inner ring is also slightly rotating When moving in a straight line The ball inside will roll Because it's a sign So i draw it like this Then it will look a bit like running on a playground The groove here will be oval So these balls will keep spinning inside When moving in a straight line These balls will look like this Here the ball will also Do a slight rotation with the outer ring and the inner ring This is mainly the practice here To show this linear motion And a slight rotational movement Let everyone refer and get to know Finally to summarize Types and specifications of bearings In fact, these kinds of Not all types of bearings There are still quite a few types that are endless So today we mainly use these types For beginners Let's get to know the bearings In fact, the bearings are similar Most of them are structured in this form To complete the functions it needs The types of specifications introduced today It still has some subdivided functions I didn’t introduce too much detail here The types of bearings not introduced are like Fisheye Bearing Or a bearing with a bearing Or BBset for bicycles Like this is not introduced I won’t discuss it here It’s not suitable for beginners to get to know The most commonly used bearings are ball bearings Maybe on a bicycle or It will be used on motorcycles and cars Or Gear box and so on like this rolling type You might see it And linear bearings are also very common Like 3D printing You will see a lot of linear bearings Here we can also go after getting to know Something in your life You can go find out Are there so many bearings around us It may be less likely to see Like a thrust bearing Or this kind of needle roller, tapered roller, etc. This may be relatively rare It’s through this acquaintance that we discover See if you can see the surrounding things Bearings we know Let's imagine Think about it What is its purpose Why do these objects put these bearings Instead of the ball bearings we often use We can imagine and learn Today's teaching ends here Let's look forward to the next teaching Bye~ Bye~
