<![CDATA[SoliForum - 3D Printing Community — Bearings]]> https://www.soliforum.com/topic/14576/bearings/ Tue, 10 May 2016 14:35:24 +0000 PunBB <![CDATA[Re: Bearings]]> https://www.soliforum.com/post/122583/#p122583 Let me opine to the OP question. I am an Engineer and I work with materials on a daily basis as part of my job as a designer of machinery. To answer your question, the 8mm i.d. bearings sold by most 3d printing shops have a 15mm outside diameter and are 24mm in length. I don't know if these will fit the DaVinci x and y carrier but I guess I will check them out when I get home today. In addition, 1055 if even hardened to C58 –C65 is not the best material for these rods. Reason is unless you keep them well oiled, these rods will rust due to their .5 to .6% carbon content. Most rods sold in the Reprap market for your DIY builders are harden Stainless Steel, 303 to 83B (Brinell) which is equivalent to 63.3 Rockwell on the C scale. If you go to someone like www.servocity.com you can buy quality 8mm linear bearings and shaft for a reasonable price. Again, let me repeat, you should never run hardened bearings on a shaft that is not hardened as previously stated because you will ruin the shaft. Last point, in looking over my DaVinci, the rods are held in place with “snap rings” through the sheet metal walls. Servo city sells 1” X 1” aluminum hubs you can use to hold the rods in place but I have not looked into the space available to use these hubs in the DaVinci. This might be an option provided the linear bearings and bushings are same outside diameter. Hope this helps!

]]> Tue, 10 May 2016 14:35:24 +0000 https://www.soliforum.com/post/122583/#p122583 <![CDATA[Re: Bearings]]> https://www.soliforum.com/post/122242/#p122242 That guy wanted $200 for a full set of rods when I messaged him. I did end up buying some Davinci part STLs from him though.

]]> Tue, 03 May 2016 21:17:05 +0000 https://www.soliforum.com/post/122242/#p122242 <![CDATA[Re: Bearings]]> https://www.soliforum.com/post/122240/#p122240 Found it.

http://www.ebay.com/itm/161719587675?ss … 1558.l2649


But I want the Y axis as well, it the Y axis that makes alot of noise..

]]> Tue, 03 May 2016 20:55:02 +0000 https://www.soliforum.com/post/122240/#p122240 <![CDATA[Re: Bearings]]> https://www.soliforum.com/post/122237/#p122237 There is a guy selling hardened rods for da vinci 1.0 on ebay, but I cant find him.
Maby something of this will will work?

But the problem is the carrier, there is no way that I can get bigger bearings in to the plastic carrier?

]]> Tue, 03 May 2016 20:40:39 +0000 https://www.soliforum.com/post/122237/#p122237 <![CDATA[Re: Bearings]]> https://www.soliforum.com/post/122233/#p122233 That's what she said

]]> Tue, 03 May 2016 18:52:21 +0000 https://www.soliforum.com/post/122233/#p122233 <![CDATA[Re: Bearings]]> https://www.soliforum.com/post/122232/#p122232 By the way, by bigger I meant longer just to clarify.

]]> Tue, 03 May 2016 18:31:53 +0000 https://www.soliforum.com/post/122232/#p122232 <![CDATA[Re: Bearings]]> https://www.soliforum.com/post/122231/#p122231 carl_m1968 wrote:
Landin81 wrote:
cmcc wrote:

I got 2 meters of 8mm hardened rods and cut them to size, and tapped the ends for M3. I don't think that there is anything that would be a drop in replacement.


What do you mean with "I don't think that there is anything that would be a drop in replacement"? Dont really understand that kind of english smile

It means there is not anything pre made or ready for this machine you could buy.

You would need to buy rods that are bigger and cut them.

You could probably get rods the exact size with end modifications from Misumi, but it would probably be pretty expensive.

]]> Tue, 03 May 2016 18:28:50 +0000 https://www.soliforum.com/post/122231/#p122231 <![CDATA[Re: Bearings]]> https://www.soliforum.com/post/122230/#p122230 carl_m1968 wrote:
Landin81 wrote:
cmcc wrote:

I got 2 meters of 8mm hardened rods and cut them to size, and tapped the ends for M3. I don't think that there is anything that would be a drop in replacement.


What do you mean with "I don't think that there is anything that would be a drop in replacement"? Dont really understand that kind of english smile

It means there is not anything pre made or ready for this machine you could buy.

You would need to buy rods that are bigger and cut them.

You could probably get rods the exact size with end modifications from Misumi, but it would probably be pretty expensive.

]]> Tue, 03 May 2016 18:28:44 +0000 https://www.soliforum.com/post/122230/#p122230 <![CDATA[Re: Bearings]]> https://www.soliforum.com/post/122229/#p122229 Landin81 wrote:
cmcc wrote:

I got 2 meters of 8mm hardened rods and cut them to size, and tapped the ends for M3. I don't think that there is anything that would be a drop in replacement.


What do you mean with "I don't think that there is anything that would be a drop in replacement"? Dont really understand that kind of english smile

It means there is not anything pre made or ready for this machine you could buy.

You would need to buy rods that are bigger and cut them.

]]> Tue, 03 May 2016 18:14:11 +0000 https://www.soliforum.com/post/122229/#p122229 <![CDATA[Re: Bearings]]> https://www.soliforum.com/post/122227/#p122227 cmcc wrote:

I got 2 meters of 8mm hardened rods and cut them to size, and tapped the ends for M3. I don't think that there is anything that would be a drop in replacement.


What do you mean with "I don't think that there is anything that would be a drop in replacement"? Dont really understand that kind of english smile

]]> Tue, 03 May 2016 17:52:30 +0000 https://www.soliforum.com/post/122227/#p122227 <![CDATA[Re: Bearings]]> https://www.soliforum.com/post/122225/#p122225 Landin81 wrote:
mark.burton wrote:

Here is the problem with using LM8UU  bearings.

the rods are not case hardened. This means you will get wear on the shafts.  that is why I went with the igus.
If you are not changing the rods as well do not switch out to LM8UU bearings.

If you can get hardened rods that are cut right then sure go for it.


Sounds good. But what rods can I buy?
I think my are a little bent, its about 1mm off in the middle on a new glass. so I think the rods are bent =/


I got 2 meters of 8mm hardened rods and cut them to size, and tapped the ends for M3. I don't think that there is anything that would be a drop in replacement.

]]> Tue, 03 May 2016 15:35:51 +0000 https://www.soliforum.com/post/122225/#p122225 <![CDATA[Re: Bearings]]> https://www.soliforum.com/post/122209/#p122209 mark.burton wrote:

On my  x carriage I am using the Igus  rjm-01-08 I haven't changed the y carriage


So. I just got my Igus RJM0108.
But they wont fit, they are to big =/

Do I need to do a complicated mod to get them to fit? =/

]]> Tue, 03 May 2016 10:48:53 +0000 https://www.soliforum.com/post/122209/#p122209 <![CDATA[Re: Bearings]]> https://www.soliforum.com/post/121167/#p121167 mark.burton wrote:

Here is the problem with using LM8UU  bearings.

the rods are not case hardened. This means you will get wear on the shafts.  that is why I went with the igus.
If you are not changing the rods as well do not switch out to LM8UU bearings.

If you can get hardened rods that are cut right then sure go for it.


Sounds good. But what rods can I buy?
I think my are a little bent, its about 1mm off in the middle on a new glass. so I think the rods are bent =/

]]> Sat, 16 Apr 2016 03:48:18 +0000 https://www.soliforum.com/post/121167/#p121167 <![CDATA[Re: Bearings]]> https://www.soliforum.com/post/121143/#p121143 Here is the problem with using LM8UU  bearings.

the rods are not case hardened. This means you will get wear on the shafts.  that is why I went with the igus.
If you are not changing the rods as well do not switch out to LM8UU bearings.

If you can get hardened rods that are cut right then sure go for it.

]]> Fri, 15 Apr 2016 21:36:45 +0000 https://www.soliforum.com/post/121143/#p121143 <![CDATA[Re: Bearings]]> https://www.soliforum.com/post/121114/#p121114 Would these fit?

http://www.ebay.com/itm/12Pcs-Practical … SwW1ZTxFTo

]]> Fri, 15 Apr 2016 00:19:56 +0000 https://www.soliforum.com/post/121114/#p121114