• Tired of adverts on RWI? - Subscribe by clicking HERE and PMing Trailboss for instructions and they will magically go away!

BP Seadweller.. Best SD available Period

Giver

Active Member
6/2/13
269
0
0
Guys, i have a problem with my bp sd from sora and need some info.. adrian told me that the tube hole on my bp case is to wide for tc tube and need to be tapped or glued to fit a tc crown. Does anybody know what is the best method to fit an tc or gen crown? I remember a thread where somebody say that a gen crown fit the bp case better but i can't find it anymore.
 

wankerdude

Renowned Member
18/8/13
550
7
18
Guys, i have a problem with my bp sd from sora and need some info.. adrian told me that the tube hole on my bp case is to wide for tc tube and need to be tapped or glued to fit a tc crown. Does anybody know what is the best method to fit an tc or gen crown? I remember a thread where somebody say that a gen crown fit the bp case better but i can't find it anymore. ?
You can ask Rsh but he just put a gen crown/tube in my SD and I don't think he had to tap the case to do it. But I read in this thread a while back the stock case thread was .3 and it needs to be .35 so maybe that is the issue. So if you put some jb weld on it I would think it would seal that gap if that is the problem. Either way good luck
 

wankerdude

Renowned Member
18/8/13
550
7
18
I just found this post a while back:
quote_icon.png
Originally Posted by R2D4

Just a heads up for those planning a Crown-Tube swap with TC's or Gen/Clarks equiv.

The BP case is drilled and tapped to accept an M3 X.35 Pitch tube. The TC tube and the Aftermarket Gen tubes are M3 X .3. While this might not sound like a big difference, it is actually a "no-go" without the proper threads. I contacted CaskerCo about this because Otto, Casker, Esslingler all sell a .35 pitch tap, which will not work with their .3 ptich tubes. .35 is an IFI standard size which explains why they all carry them. Esslinger probably thought I was nuts and replied that they can get the .3 pitch if "I" wanted them too. lol, I bought tubes from all of them. They are all .3 pitch. So they can do what they need to do but..me.. I vote for the proper threads in the case.

Don't believe me? Buy a thread pitch gauge and see for yourself. ;)

I re-tapped the case to .3 from a .35, it's not ideal but it holds extremely well if you do this correctly. The TC and the Gen tubes are longer than the rep anyway, so you have twice the thread engagement into the case.
 

Rudy40

Banned member, the goat does not approve
Banned
6/10/12
9,373
0
0
I just found this post a while back:
quote_icon.png
Originally Posted by R2D4

Just a heads up for those planning a Crown-Tube swap with TC's or Gen/Clarks equiv.

The BP case is drilled and tapped to accept an M3 X.35 Pitch tube. The TC tube and the Aftermarket Gen tubes are M3 X .3. While this might not sound like a big difference, it is actually a "no-go" without the proper threads. I contacted CaskerCo about this because Otto, Casker, Esslingler all sell a .35 pitch tap, which will not work with their .3 ptich tubes. .35 is an IFI standard size which explains why they all carry them. Esslinger probably thought I was nuts and replied that they can get the .3 pitch if "I" wanted them too. lol, I bought tubes from all of them. They are all .3 pitch. So they can do what they need to do but..me.. I vote for the proper threads in the case.

Don't believe me? Buy a thread pitch gauge and see for yourself. ;)

I re-tapped the case to .3 from a .35, it's not ideal but it holds extremely well if you do this correctly. The TC and the Gen tubes are longer than the rep anyway, so you have twice the thread engagement into the case.

I don't know what was all involved for making the TC tube work in the BP SD case
But Rudy/AKA/ rsh / made it work for a couple of my projects! And all I was told was he re tapped the case and installed the tube? So go figure? But I have built four of these BPSD and owned five of them..three which TC tube was installed.. So rsh must have a secret?


Sent from my Rolex thinking brain!
 

ado213

Renowned Member
27/4/12
714
185
43
UK
Guys, i have a problem with my bp sd from sora and need some info.. adrian told me that the tube hole on my bp case is to wide for tc tube and need to be tapped or glued to fit a tc crown. Does anybody know what is the best method to fit an tc or gen crown? I remember a thread where somebody say that a gen crown fit the bp case better but i can't find it anymore. ?


Hi all,
the problem is not with the thread pitches, "Givers" crown tube hole in the case is too big, simple as that. The case tube has been stuck in with epoxy I think?. The new TC crown tube is to say the least a "piss fit". So we overcome this by "plugging" the case, re-drilling and tapping no JB weld on this one folks.
 

wankerdude

Renowned Member
18/8/13
550
7
18
Hi all,
the problem is not with the thread pitches, "Givers" crown tube hole in the case is too big, simple as that. The case tube has been stuck in with epoxy I think?. The new TC crown tube is to say the least a "piss fit". So we overcome this by "plugging" the case, re-drilling and tapping no JB weld on this one folks.
Nice, sounds like a true fix and not a hack job!
 

Smpfan

Renowned Member
18/9/11
996
303
63
I solved the tube thread problem on another way. BP's case is threaded 0,35mm. Tc's, gen and WSO's tubes are threaded 0,3mm. I cleaned up and rethreaded BP's tube thread with a tap 0,35mm. After that I rethreaded the TUBE with a die 0,35mm! I did this because it is too hard and expensive sourcing a tap 0,3mm.
This method works fine but you have to use a special die. The die must be machined down on the one side to lose the tap point. Otherwise you will not reach the last two or three threads on the tube. Of course you need the special wrench key for RLX tubes, too.
Using a gen or gen spec WSO tube does also mean you have to countersunk the case tube hole.


Cheers

Andi
 

PoptheC

Active Member
18/5/13
321
50
28
How do I reinstall the DWO on 2836? I can't seem to get the damn screw back in place without binding on the DWO. Help!!!
 

KBH

Mythical Poster
1/11/07
7,168
43
48
Not overly difficult. Take the date wheel off and screw it down and then re-install the date wheel. It's easy on a 2836.
I use a razor blade under the DW to push the little spring in. Then line up the teeth in the holes on the chrome plate and ease it down into place. It's harder with an overlay cause you can't see what you're doing very well but it'll go on with a little practice.

 

PoptheC

Active Member
18/5/13
321
50
28
Not overly difficult. Take the date wheel off and screw it down and then re-install the date wheel. It's easy on a 2836.
I use a razor blade under the DW to push the little spring in. Then line up the teeth in the holes on the chrome plate and ease it down into place. It's harder with an overlay cause you can't see what you're doing very well but it'll go on with a little practice.


Hi KBH, I have a spare 2824-2 from CrPO, is there any chance that it will fit straight into Bpsd casing, with the DWO swapped over? Thanks!
 

rsh

Respected Member
3/4/10
5,137
38
48
My suggestion is to stick with a 2836, at the least 2824 should have h4 canon pinion setup so you can use a wider movement spacer to lower the crown a tiny amount
 

Niven

Getting To Know The Place
15/2/14
44
1
0
with posts earlier
can anyone confirm that the high beat 2813 can be changed to 2836 without the need go change hands and dial?

thanks
 

rsh

Respected Member
3/4/10
5,137
38
48
Yes I can confirm, high beat 21j movement is a crude ETA clone, dial hands all swap over, you may need a datewheel overlay though
 

PoptheC

Active Member
18/5/13
321
50
28
My suggestion is to stick with a 2836, at the least 2824 should have h4 canon pinion setup so you can use a wider movement spacer to lower the crown a tiny amount

Thanks for the advice!