As this is little complicated topic, so If you have any questions, or want more clarity on any part of this video please do ask. I would like to make a clarity video on your questions.
Sir, In case of clamp or using lock nut, How can I assume or put specific amount of preload? For example, manufacturer need 100N +/- 10% preload on inner ring, how can I apply that amount?? Please give me advice
This depends on many factors like as i said in this video.. I Can't surely say. Can't be manually calculated. Either consult with the bearing manufacturer sales team or use simulation software if the manufacturer is providing. That's the solution. It's risky.
very informative video !!!! I have a couple of questions. 1. I have designed a shaft supported by 2 single row taper roller bearings in a back to back arrangement. The shaft experiences pure axial load in both directions as tension and compression and very little radial load. the shaft is step turned on one side and during tension the bearing near the step turned face is loaded and during compression the bearing on the other side is loaded, but the other side of the shaft is locked using a KMT nut. can the nut with stand the load while the shaft experiences compression ? 2. since i am going to use taper roller bearing, is the preload from the KMT locknut sufficient ?
1. Yes of course KMT nut can withstand load (this is the purpose of KMT nut, same thing you can in tractor wheels) 2. Yes it should provide necessary preload.
Thank you so much for your reply!!! I have one last question, I have chosen an SKF 32004X bearing with static load rating of 27KN for my project where there is axial load of 5KN and less than 10RPM, will the load deform the bearing ? or should i choose a bearing with better static load or should i look for other type of bearing ?
For motorized spindle for drilling application,spring preloading would be appropriate?and the general formula u used to calculate preload force can be used for NSK bearings? As the dynamic load rating of bearing we have selected is 23200N and if i take pf=1% then preload=232N so Medium preloading is selected
@mastermechanicaldesign for my application formula can be used?if not then what should i do ,we have gone through many papers but we couldn't get any preloading suitable for our application
Use universal matched pairs of angular contact bearings. As your application is a machining tool. You need precision. So selection preload class universal matched bearing. And there are three preload classes in SKF. But I'm sure about NSK. So try to find in their catalogue or on website
Thank you for the excellent video. I have a question when I assembled vertical pump top bearing(angular contact bearing) that was loose fit (journal, housing). I have lots of experience what assemble various machines so most of angular contact bearing machines journal were loose fit from my experience. I really want to know what why designer adapt to angular contact bearing loose fit between inner race of angular bearing and shaft jounal. Please let me know. Thank you.
Hey.. I'm little confused, actually we should not assembly angular contact bearing in loose fit. angular contact bearings should be always preload. to achieve the maximum possible life.
Thank you sir. You are right. Usually angular contact ball bearing are given preload to axial direction(face to face, back to back, tandem). But Usually angular contact ball bearing are loose fit to radial direction between inner race of bearing and shaft. Please let me know why adapt loose fit there.
hello, could you send a link to the skf pdf, where to find guidelines on preloading methods (construction), ring width, etc.? You used screen from it for example in 16;07
Hi! Thanks for a very useful video! In my application, I want to get large axial load capacity out of a small diameter, so I am planning to use an arrangement with four angular contact ball bearings with 40 degree contact angle. Radial loads will be minimal but not zero. If I don't want to use "super precision" bearings due to the cost of those, then do I need to worry about manually controlling the clearance/preload when using a "Tandem back-to-back (QBC)" arrangement of universally matched angular contact ball bearings? If I just pick one of the preload classes of bearings will it work when there is four of them together? The load could be applied in either direction at any given time: - When load is applied towards the left, the two bearings on the left will not be loaded - When load is applied towards the right, the two bearings on the right will not be loaded Does this mean I would need to apply a preload of some kind to keep the unloaded bearings loaded? How do I know that the preload won't get cancelled out by the external load, if I tighten the bearing set up using a KMT locknut from SKF on the inner ring, with another screwed cap on the outer ring? Would I be okay just to tighten the bearing set up to the recommended KMT locknut torque?
Additionally, if I apply an axial force to my bearing set, will the thrust housing need to be able to withstand a radial force, based directly on the contact angle of the ACBB?
Hey, 1st you don't need to go for super precision bearings until high precision level is not required Like radial run-out (depending on application), also if speed is not much (less than 8000 RPM) normal grade universal match bearings are fine. 2nd, if load is not applying on bearings, that's fine, (if bearings are already preloaded) 3rd, KMT locknut- yes tightening the lock nut with recommended torque is okay. but as much i know they will not provide you torque, they will provide preload force. so make sure this.
Type of bearings always depends on the load direction, the amount of load, speed, also what kind of misalignment is there, and we can decide the bearing size as per bearing service life calculation. There is a complete process, I will make the detailed videos on bearing selection Just after this bearing basic series
Maybe the wrong place but what about on mtb hubs with bearings.. would adjusting the play be preload ? If so how much space in between bearing and cone do you think would be needed for optimum use ? Mm?
It is very knowledgeable video, and also your explaining langauge is very best because it is slowly and clear. Thanks.
Step by step complete detailing & technically. Like very much.
As this is little complicated topic, so If you have any questions, or want more clarity on any part of this video please do ask. I would like to make a clarity video on your questions.
Super explanation ❤
Sir,
In case of clamp or using lock nut,
How can I assume or put specific amount of preload?
For example, manufacturer need 100N +/- 10% preload on inner ring,
how can I apply that amount??
Please give me advice
I have seen in SKF, they use a Torque wrench. But i would highly recommend using a set of universal matched bearings. Instead of manual preloading
@@mastermechanicaldesign when I use torque wrench, what amount of torque Nm create 100N?
The bearings are not universal matched set.
This depends on many factors like as i said in this video.. I Can't surely say. Can't be manually calculated. Either consult with the bearing manufacturer sales team or use simulation software if the manufacturer is providing. That's the solution. It's risky.
very informative video !!!! I have a couple of questions.
1. I have designed a shaft supported by 2 single row taper roller bearings in a back to back arrangement. The shaft experiences pure axial load in both directions as tension and compression and very little radial load. the shaft is step turned on one side and during tension the bearing near the step turned face is loaded and during compression the bearing on the other side is loaded, but the other side of the shaft is locked using a KMT nut. can the nut with stand the load while the shaft experiences compression ?
2. since i am going to use taper roller bearing, is the preload from the KMT locknut sufficient ?
1. Yes of course KMT nut can withstand load (this is the purpose of KMT nut, same thing you can in tractor wheels)
2. Yes it should provide necessary preload.
Thank you so much for your reply!!!
I have one last question, I have chosen an SKF 32004X bearing with static load rating of 27KN for my project where there is axial load of 5KN and less than 10RPM, will the load deform the bearing ? or should i choose a bearing with better static load or should i look for other type of bearing ?
For motorized spindle for drilling application,spring preloading would be appropriate?and the general formula u used to calculate preload force can be used for NSK bearings? As the dynamic load rating of bearing we have selected is 23200N and if i take pf=1% then preload=232N so Medium preloading is selected
For machining applications I guess a fixed spacer preloaded would be better. And Yes, the same formula can be used for NSK as well
@mastermechanicaldesign for my application formula can be used?if not then what should i do ,we have gone through many papers but we couldn't get any preloading suitable for our application
Use universal matched pairs of angular contact bearings. As your application is a machining tool. You need precision. So selection preload class universal matched bearing. And there are three preload classes in SKF. But I'm sure about NSK. So try to find in their catalogue or on website
Thank you for the excellent video.
I have a question when I assembled vertical pump top bearing(angular contact bearing) that was loose fit (journal, housing).
I have lots of experience what assemble various machines so most of angular contact bearing machines journal were loose fit from my experience. I really want to know what why designer adapt to angular contact bearing loose fit between inner race of angular bearing and shaft jounal.
Please let me know.
Thank you.
Hey.. I'm little confused, actually we should not assembly angular contact bearing in loose fit. angular contact bearings should be always preload. to achieve the maximum possible life.
Thank you sir. You are right. Usually angular contact ball bearing are given preload to axial direction(face to face, back to back, tandem). But Usually angular contact ball bearing are loose fit to radial direction between inner race of bearing and shaft. Please let me know why adapt loose fit there.
hello, could you send a link to the skf pdf, where to find guidelines on preloading methods (construction), ring width, etc.? You used screen from it for example in 16;07
Sure Krystian, www.skf.com/binaries/pub12/Images/0901d196802809de-Rolling-bearings---17000_1-EN_tcm_12-121486.pdf
Hi! Thanks for a very useful video!
In my application, I want to get large axial load capacity out of a small diameter, so I am planning to use an arrangement with four angular contact ball bearings with 40 degree contact angle. Radial loads will be minimal but not zero.
If I don't want to use "super precision" bearings due to the cost of those, then do I need to worry about manually controlling the clearance/preload when using a "Tandem back-to-back (QBC)" arrangement of universally matched angular contact ball bearings? If I just pick one of the preload classes of bearings will it work when there is four of them together?
The load could be applied in either direction at any given time:
- When load is applied towards the left, the two bearings on the left will not be loaded
- When load is applied towards the right, the two bearings on the right will not be loaded
Does this mean I would need to apply a preload of some kind to keep the unloaded bearings loaded? How do I know that the preload won't get cancelled out by the external load, if I tighten the bearing set up using a KMT locknut from SKF on the inner ring, with another screwed cap on the outer ring? Would I be okay just to tighten the bearing set up to the recommended KMT locknut torque?
Additionally, if I apply an axial force to my bearing set, will the thrust housing need to be able to withstand a radial force, based directly on the contact angle of the ACBB?
Hey, 1st you don't need to go for super precision bearings until high precision level is not required Like radial run-out (depending on application), also if speed is not much (less than 8000 RPM) normal grade universal match bearings are fine.
2nd, if load is not applying on bearings, that's fine, (if bearings are already preloaded)
3rd, KMT locknut- yes tightening the lock nut with recommended torque is okay. but as much i know they will not provide you torque, they will provide preload force. so make sure this.
What type of bearing would be used in making a sand mixer (that used in foundries) and how should one approach a project like this.
Thank you
Type of bearings always depends on the load direction, the amount of load, speed, also what kind of misalignment is there, and we can decide the bearing size as per bearing service life calculation.
There is a complete process, I will make the detailed videos on bearing selection
Just after this bearing basic series
@@mastermechanicaldesign Thank you 🙏
@@mastermechanicaldesign Thank you 🙏
Maybe the wrong place but what about on mtb hubs with bearings.. would adjusting the play be preload ? If so how much space in between bearing and cone do you think would be needed for optimum use ? Mm?
I don't think MTB hub (Mountain Bike Hubs) comes with angular contact bearings. if it's simple ball bearing then preload is not required.
Enduro has angulat bearings
Preload is required for both types of bearings. That is why both Shimano and SRAM have preload adjusters.
ua-cam.com/video/OjE1YMj9Al0/v-deo.htmlsi=HnhlfobvDX1bfDA1
thank you
Thanks
You welcome 😊
That R temp formula is only for angular contact bearing or any type of bearing
This is for all types of bearings.
Hindi
Overthinker are better understand to this topic 😂
😂 Right