Jump to content
When you buy through links on our site, we may earn an affiliate commission.
  • Current Donation Goals

Noob Daytona 4130 super thread


tonyp1

Recommended Posts

On 5/24/2024 at 6:17 PM, freddy333 said:

the problem with that auto wind module is the lack of enough ball bearings and i think that makes it really loud. the new ones i had seen appear to have the correct number of ball bearings, if that is real picture the dealers have there

Link to comment
Share on other sites

Shortly after I installed the gen balance, I also replaced the rotor, which includes the bearing.

The 1st pic is of the Big Kahuna's original A4130 rotor/bearing.

The 2nd pic is the gen 4130 rotor/bearing.

As you can see, both 4130 rotors contain 7 ball bearings. The only difference between the rotor bearings is that the tiny tabs that retain the bearing race (where the balls circulate) is more visible on the gen when viewed under magnification. Other than that, I do not see much difference other than the slightly smoother finish on the gen metal surfaces. But, unless you see them side by side, I doubt you could tell the difference anyway.

However, the new 4131 contains what Rolex calls an 'optimized' rotor/bearing, which contains 40 or so ball bearings & a different bearing race. Alot of people, who have only seen the current 4131 rotor bearing, think the A4130's rotor bearing must be an 'obvious tell' of fakery because it has only 7 ball bearings, unaware that that is actually correct for the 4130; only the current (4131) movement has the 'optimized' rotor/bearing.

As to the A4130's rotor being 'loud' -- that has not been my experience. Certainly, in comparison with the old secs @ 6 7750 Daytonas, the A4130 is nearly gen quiet. Shaking an A4130 will not give you away like some of the old 7750s often did. Only with your ear right up to the caseback can you hear a difference between the A4130's spinning rotor & the gen's (& the subtle difference may simply be due to a lack of proper oiling by the factory). Unless you plan to install a display caseback (as I did), I would not worry about the A4130's rotor/bearing.

A4130 rotor+1.jpg

gen 4130 rotor+1.jpg

4131 rotor.jpg

Link to comment
Share on other sites

10 hours ago, freddy333 said:

Shortly after I installed the gen balance, I also replaced the rotor, which includes the bearing.

The 1st pic is of the Big Kahuna's original A4130 rotor/bearing.

The 2nd pic is the gen 4130 rotor/bearing.

As you can see, both 4130 rotors contain 7 ball bearings. The only difference between the rotor bearings is that the tiny tabs that retain the bearing race (where the balls circulate) is more visible on the gen when viewed under magnification. Other than that, I do not see much difference other than the slightly smoother finish on the gen metal surfaces. But, unless you see them side by side, I doubt you could tell the difference anyway.

However, the new 4131 contains what Rolex calls an 'optimized' rotor/bearing, which contains 40 or so ball bearings & a different bearing race. Alot of people, who have only seen the current 4131 rotor bearing, think the A4130's rotor bearing must be an 'obvious tell' of fakery because it has only 7 ball bearings, unaware that that is actually correct for the 4130; only the current (4131) movement has the 'optimized' rotor/bearing.

As to the A4130's rotor being 'loud' -- that has not been my experience. Certainly, in comparison with the old secs @ 6 7750 Daytonas, the A4130 is nearly gen quiet. Shaking an A4130 will not give you away like some of the old 7750s often did. Only with your ear right up to the caseback can you hear a difference between the A4130's spinning rotor & the gen's (& the subtle difference may simply be due to a lack of proper oiling by the factory). Unless you plan to install a display caseback (as I did), I would not worry about the A4130's rotor/bearing.

A4130 rotor+1.jpg

gen 4130 rotor+1.jpg

4131 rotor.jpg

Thanks for educating me :)

  • Like 1
Link to comment
Share on other sites

DD = Dangdong and are now considered the best option.  SH less quality.  Noob is usually poor quality and less compatible with Gen parts.  That is my experience with their 32xx movements anyways.  I'll defer to Freddy333 w/r/t the 4130. 

 

Here is a good comparison of the 3xxx's which I am guessing translates to 41xx to some degree:

 

Link to comment
Share on other sites

  • 1 month later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
×
×
  • Create New...
Please Sign In or Sign Up