[peteeng]

\r\n \r\n The ground side goes to the bearing. Peter\r\n \r\n

[laseruser]

\r\n \r\n

\r\n

\r\n

\r\n

\r\n \r\n \r\n

The ground side goes to the bearing. Peter

\r\n \r\n

\r\n

\r\n

What is "ground side"? Do you mean the orientation shown in the photo is wrong and I should flip it so that the silver ring (pointed by the red arrow) is facing BK12?
\n
\nhttps://imgur.com/a/gsLp4sh\r\n \r\n

[peteeng]

\r\n \r\n Yes - Thats correct. There is a spacer inside the assembly that has ground ends. The spacer slips into the seal. The nut pushes on the spacer and the spacer pushes against the bearing race. They need to be square so that\'s why the contact surfaces are ground flat. Peter
\n
\nyour nut maybe ground both sides? Just ensure that the nut is pushing the spacer not the seal...\r\n \r\n

[laseruser]

\r\n \r\n

\r\n

\r\n

\r\n

\r\n \r\n \r\n

Yes - Thats correct. There is a spacer inside the assembly that has ground ends. The spacer slips into the seal. The nut pushes on the spacer and the spacer pushes against the bearing race. They need to be square so that\'s why the contact surfaces are ground flat. Peter
\n
\nyour nut maybe ground both sides? Just ensure that the nut is pushing the spacer not the seal...

\r\n \r\n

\r\n

\r\n

\nSo B is the correct way. Nut seems to be grounded on one side only. Please refer to the photo.
\n
\nhttps://imgur.com/a/hV1DzUz
\n
\nHow to ensure that the nut is pushing the black spacer not the seal? Any good video to show the proper way to tighten the nut?\r\n \r\n

[joeavaerage]

\r\n \r\n Hi,
\nit looks to me that in A there is the sleeve peteeng is talking about, whereas in B it seems to be missing.
\nThe nut is in the correct orientation in B, but it should clamp firmly to a tubular ring which transmits that clamping to the bearing.
\nCan you confirm the existence of that sleeve/ring?
\n
\nCraig\r\n \r\n

[laseruser]

\r\n \r\n

\r\n

\r\n

\r\n

\r\n \r\n \r\n

Hi,
\nit looks to me that in A there is the sleeve peteeng is talking about, whereas in B it seems to be missing.
\nThe nut is in the correct orientation in B, but it should clamp firmly to a tubular ring which transmits that clamping to the bearing.
\nCan you confirm the existence of that sleeve/ring?
\n
\nCraig

\r\n \r\n

\r\n

\r\n

\nThanks for checking. I took B apart to check. Do you mean those two black rings shown in the photo?
\n
\nhttps://imgur.com/a/q7WMIWm
\n
\nPlease note that the one at the front (circled in red) is taller than the one at the back. Does this look OK?\r\n \r\n

[joeavaerage]

\r\n \r\n Hi,
\nyes, they must be in place. You can now see that the nut bears on one ring, which transmits that to the bearings and then through the second ring to the shoulder of
\nthe ballscrew. That is as it should be. Note that the outer surface of the rings is also the surface that the two seals rub on, they must be perfectly clean and smooth
\nor the seal lip will be destroyed.
\n
\nCraig\r\n \r\n

[laseruser]

\r\n \r\n

\r\n

\r\n

\r\n

\r\n \r\n \r\n

Hi,
\nyes, they must be in place. You can now see that the nut bears on one ring, which transmits that to the bearings and then through the second ring to the shoulder of
\nthe ballscrew. That is as it should be. Note that the outer surface of the rings is also the surface that the two seals rub on, they must be perfectly clean and smooth
\nor the seal lip will be destroyed.
\n
\nCraig

\r\n \r\n

\r\n

\r\n

Thanks. Any good way to tighten the nut properly for this assembly? I have seen a few videos but not sure if they were doing it correctly.\r\n \r\n

[joeavaerage]

\r\n \r\n Hi,
\nit is not hugely critical. Once the nut is tight there is a solid \'stack\' of rings and bearing races between the clamping face of the nut
\nand the shoulder of the ballscrew. If you really torque the nut tight the parts all being essentially incompressible do not change.
\nProvided there is sufficient torque to prevent a gap forming between one or more of the rings and/or races if the load opposes the clamping force
\nthen its enough.
\n
\nI would torque them to firm, say 25Nm. More would not hurt, but neither do you gain anything. Is there any way to lock them once torqued up? My FK25\'s have a little grub screw
\nin the nut to lock it.
\n
\nCraig\r\n \r\n

[Stevecjx]

\r\n \r\n hello friend,
\nThis is Steve from MSM Store.We\'re selling various of Linear Bearings,Shaft Holders,Couplings,Handles,Manual Screw Jacks,Press Plates,etc.Mainly all kinds of accessories of machines.If you have in need of such items,please feel free to contact me [email protected]
\nYou may also visit our site at https://www.msmstore.com/ for details.
\nThanks\r\n \r\n

[laseruser]

Hello, I bought a SFU1605 ball screw set from Amazon. It came with a BK Support, BF Support, Nut Housing, Locking Spring, Locking nut and Coupler. The Locking Nut has one side showing the silver metallic screw thread. Is that side supposed to be facing (touching) the BK Support or the Coupler? The seller said it should be facing the Coupler but on youtube, I have seen two persons doing it the opposite way. Could you please let me know which is the correct orientation and why?