Video Key Points: Introduction - 0:04 Slewing Bearing Explanation - 0:22 Why Make a Custom Slewing Bearing? - 3:04 Outer Ring Component - 4:04 Steel Balls - 5:51 Inner Ring - 6:29 Sourcing & Modifying Off the Shelf Gears - 8:06 Matching Gears - 11:12 Clearance & Tolerancing - 12:50 Sending Parts for Manufacture - 13:58 Mechanical Drawing Example - 14:25 Mounting Example - 16:06 Thanks for watching. Please like the video and subscribe to the channel for more content
I was just searching for something to give me an introduction on slew bearings, but seeing a how-to-design-it was even more valuable. Thanks for your content!
Thanks for the intro. I am planning a costume that needs a slew bearing to go around my waist so the entire upper section can rotate freely, and this helps me get a good idea of what I need. I'll be designing parts for 3d printing, so this helps a lot.
Great video. Would be interesting to see your commercial solution with actual tolerances and drawings. I don't get the part where you say that the inner ring must be executed as a split version. You could add the balls and spacers from an outer ring bore hole.
Thank you very much for the video, it has been very clear of all the tutorials I have ever watched. Will really appreciate if you can share the files for 3d Printing :) Would love to give it a try.
Hi, links to the solidworks files and stl files for 3D printing are in the description. Purchase some 8mm steel balls (cheap ones found on Ebay). You may have to slightly increase tolerances for optimised 3D printing. Please let me know how you go =)
Haha thanks. I've used nylon PCB spacers before (for 6mm balls). I combined two different length sizes to get the fit right and it worked pretty well. Freeballing is possible but probably not ideal. I never had any luck finding bearing gates for my purposes (they're very specific parts)
Interesting video, but having the steel balls resting against flat surfaces gives a very narrow footprint, this will allow the balls to quickly wear grooves into these flat surfaces making the bearing very sloppy even if the grooves are only slight.
Yeah that's a good point. Having the flat surfaces a hard grade of steel helps but ideally the surface contact will be more. I initially had flat surfaces for simplicity and ease of machining but would try something different in the future. For a circular groove to work well the manufacturing accuracy would need to be quite good and I didn't have access to this at the time.
Great video. However there is a reason why slew bearing design should be left to the experts. V groove in Aluminium will not give any semblence of satisfactory service life. That is why Aluminium slew bearings are only used with steel wire ring inserts in very limited applications. To carry any satisfactory load the raceway shape needs to be calculated and be suited to the ball size and grade. Normal slew bearings are manufactured from 42CrMo4 forging with induction hardened raceways. This particular project would have been a very long and expensive road to a very quick failure.
Definitely better to use a hardened raceway, it was one of my first projects as an engineer so still had a lot to learn. The application didn't require a large load bearing capacity, more so just the ability to rotate, in hind sight it could have been done other ways using off the shelf bearings (like a tapered roller bearing). Interestingly the robot it was installed on is still running well to this day after years of service. Probably the aluminium has been worn down considerably but using a hardened steel V groove would have been fine for the application. Getting it manufactured through Chinese suppliers was really quite cheap. This isn't inteneded to be a replacement to a properly designed slewing bearing, just a basic example of how to go about making a custom one for a niche application
It's worth noting that that is not how professional slewing bearings are built, IIUC. Rather than have the inner or outer ring consist of two parts (which would presumably introduce a lot of weakness to the design maybe?), they drill a hole in the non-toothed ring, feed the balls and spacer rings via that hole, and then plug the hole. I think. I totally understand that you had your reasons to build yours this way, it's just that the video should have maybe emphasized that this was built differently to the standard approach.
Depends on where you get it machined. Around a few hundread dollars roughly. You can send drawings and step files away for a quote. HLH is a Chinese company I have used before for machining
@@MahdiDesigns That's interesting. Curious why you would want a custom ring instead of buying an off-the-shelf one? Cost? Performance? I'm currently sourcing one for a design I'm working on and would be interested in the trade-offs.
@@maulikdesai9431 Great question. Most of the time you would just use an off the shelf option. In the past I had to design a custom one because we had specific size and weight constraints and couldn't find an off the shelf solution. The actual design I made though for that case did use off the shelf gears, an internal gear was machined to bolt to a custom ring. Always best to look for and use off the shelf components as much as possoble
Slewing bearing with high load for slow speed. Cuz bearing with high speed must light loading while reach heavy load must slow speed. Cuz rotating can make hot and wearing
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Video Key Points:
Introduction - 0:04
Slewing Bearing Explanation - 0:22
Why Make a Custom Slewing Bearing? - 3:04
Outer Ring Component - 4:04
Steel Balls - 5:51
Inner Ring - 6:29
Sourcing & Modifying Off the Shelf Gears - 8:06
Matching Gears - 11:12
Clearance & Tolerancing - 12:50
Sending Parts for Manufacture - 13:58
Mechanical Drawing Example - 14:25
Mounting Example - 16:06
Thanks for watching. Please like the video and subscribe to the channel for more content
Good morning
I was just searching for something to give me an introduction on slew bearings, but seeing a how-to-design-it was even more valuable. Thanks for your content!
This is the best video for slewing bearing till now
As a slewing bearing manufacturer in China, we still think this is a very good and professional video!
Thanks for the intro. I am planning a costume that needs a slew bearing to go around my waist so the entire upper section can rotate freely, and this helps me get a good idea of what I need. I'll be designing parts for 3d printing, so this helps a lot.
That sounds cool! Goodluck
Also feel free to email me if you need any help on the design aspect. mahdihussein.91@gmail.com
great video, keep up the good work
Good video!
Very nice job ❣️
Great video. Would be interesting to see your commercial solution with actual tolerances and drawings.
I don't get the part where you say that the inner ring must be executed as a split version. You could add the balls and spacers from an outer ring bore hole.
That's great content mate. Thanks heaps!!!!
Thanks man!
Nice explanation
Perfect
thank you very muchhhhh
Thank U, so much. I Find The suitable Video. very very Thanks.
Great supper cection
how to mount ball? how to insert balls into the bearing?
What is the load capacity difference between slewing bearing and wire race bearing?
👍👍
Thank you very much for the video, it has been very clear of all the tutorials I have ever watched. Will really appreciate if you can share the files for 3d Printing :) Would love to give it a try.
Hi, links to the solidworks files and stl files for 3D printing are in the description. Purchase some 8mm steel balls (cheap ones found on Ebay). You may have to slightly increase tolerances for optimised 3D printing. Please let me know how you go =)
You can also 3D print the gears. I suggest using a dense infill percentage and a high number of surface layers
@@MahdiDesigns Thanks very much, I will surely give it a go, thanks for the files and the suggestions :)
We produce slewing bearing 20years. It is really clear. My email 936625719@qq. Com
Heavy equipment 🙏
You are a saint. Do I need spacers or a gate or just freeballin?
Haha thanks. I've used nylon PCB spacers before (for 6mm balls). I combined two different length sizes to get the fit right and it worked pretty well. Freeballing is possible but probably not ideal. I never had any luck finding bearing gates for my purposes (they're very specific parts)
Interesting video, but having the steel balls resting against flat surfaces gives a very narrow footprint, this will allow the balls to quickly wear grooves into these flat surfaces making the bearing very sloppy even if the grooves are only slight.
Yeah that's a good point. Having the flat surfaces a hard grade of steel helps but ideally the surface contact will be more. I initially had flat surfaces for simplicity and ease of machining but would try something different in the future. For a circular groove to work well the manufacturing accuracy would need to be quite good and I didn't have access to this at the time.
It is a perfect interpretation, maybe we will have the opportunity to cooperate
Thank you. Sure, let me know of any opportunities
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Do you have to support the inner ring underneath or can it be free floating?
It can be free floating. It is constrained by the balls so can't move up or down (except for a tiny amountof clearance)
@@MahdiDesigns Awesome, thank you!
Sean Ng Pack steel ball and plug and spacer and sealing to fix it
Same like mobile crane?
Great video. However there is a reason why slew bearing design should be left to the experts. V groove in Aluminium will not give any semblence of satisfactory service life. That is why Aluminium slew bearings are only used with steel wire ring inserts in very limited applications. To carry any satisfactory load the raceway shape needs to be calculated and be suited to the ball size and grade. Normal slew bearings are manufactured from 42CrMo4 forging with induction hardened raceways.
This particular project would have been a very long and expensive road to a very quick failure.
Definitely better to use a hardened raceway, it was one of my first projects as an engineer so still had a lot to learn. The application didn't require a large load bearing capacity, more so just the ability to rotate, in hind sight it could have been done other ways using off the shelf bearings (like a tapered roller bearing). Interestingly the robot it was installed on is still running well to this day after years of service. Probably the aluminium has been worn down considerably but using a hardened steel V groove would have been fine for the application. Getting it manufactured through Chinese suppliers was really quite cheap. This isn't inteneded to be a replacement to a properly designed slewing bearing, just a basic example of how to go about making a custom one for a niche application
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Good morning
It's worth noting that that is not how professional slewing bearings are built, IIUC. Rather than have the inner or outer ring consist of two parts (which would presumably introduce a lot of weakness to the design maybe?), they drill a hole in the non-toothed ring, feed the balls and spacer rings via that hole, and then plug the hole. I think. I totally understand that you had your reasons to build yours this way, it's just that the video should have maybe emphasized that this was built differently to the standard approach.
Yep good point, thanks for pointing that out. This was somewhere between hobby level and professional
How much does something like this cost to get machined?
Depends on where you get it machined. Around a few hundread dollars roughly. You can send drawings and step files away for a quote. HLH is a Chinese company I have used before for machining
@@MahdiDesigns That's interesting. Curious why you would want a custom ring instead of buying an off-the-shelf one? Cost? Performance? I'm currently sourcing one for a design I'm working on and would be interested in the trade-offs.
@@maulikdesai9431 Great question. Most of the time you would just use an off the shelf option. In the past I had to design a custom one because we had specific size and weight constraints and couldn't find an off the shelf solution. The actual design I made though for that case did use off the shelf gears, an internal gear was machined to bolt to a custom ring. Always best to look for and use off the shelf components as much as possoble
Fenghe Slewing bearing have an accumulated experience in slewing bearing over 30 years, price is rational, steven.zhu@xzfenghe.com
Mech Designs & SolidWorks Tutorials you can ask me for future possible cooperation 13917787104
hi there, could you please share the link to the skf pdf, thank you
good content btw
See 'SKF slewing bearings' in the download links at the bottom www.skf.com/au/products/slewing-bearings
i need slewing bearing sp-h 0455, if you have please contact me
Please add my we chat 13917787104
Halo
Repairing formula
It is certainly not your fault. But I still don't get what defines a slewing bearing and a not a slewing bearing or any combined load bearing.
Essentially just a large diameter bearing, usually with gear teeth on either the inner or outer race
Slewing bearing with high load for slow speed. Cuz bearing with high speed must light loading while reach heavy load must slow speed. Cuz rotating can make hot and wearing
Stop smacking your lips !