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Seiko Bellmatic 4006-6010 Pendant tube

steve1811uk
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steve1811uk WRT Addict

steve1811uk

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Hi All, Just looking for some advice regarding the missing pendant tube. Does anyone know the sizing used by Seiko or will it be a case of pushing the old one out and taking measurements off the hole and the new crown? I do have the correct Seiko crown in hand 55W06NS1. Never done a tube replacement before so I probably need to get a tool for that also. Thanks, Steve.

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AndyGSi Distinguished Member

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12 minutes ago, steve1811uk said:

Thanks Andy, can you offer any advice on the right kind of tool for this? Has anyone used the ones, usually red ones available on AliExpress?

I've used all sorts from Torx Bits to pieces of metal with a point and drifted it out from inside the case.

It all depends how well fitted they are as to how much persuasion they need.

Is that the remnants of the tube still in the crown?

You should measure the internal diameter before you start trying to remove it from the case.

 

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steve1811uk WRT Addict

steve1811uk

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6 hours ago, mikepilk said:

One of my Bellmatic's is in a 6010 case. I've just removed the stem and measured the stem tube :

Outer diameter 2.00mm, and it sticks out 2.6mm. It looks like it's just a push in, so should be easy to find a replacement and push it in.

 

WIN_20241219_15_20_06_Pro.jpg

6 hours ago, mikepilk said:

One of my Bellmatic's is in a 6010 case. I've just removed the stem and measured the stem tube :

Outer diameter 2.00mm, and it sticks out 2.6mm. It looks like it's just a push in, so should be easy to find a replacement and push it in.

 

WIN_20241219_15_20_06_Pro.jpg

Thanks so much Mike. From looking at the proper crown and the case I had worked out that I was going to need a stepped tube 2.0 diameter stepping down to 1.8 mm into the case. 2.6mm length was the missing info I needed.

 

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steve1811uk WRT Addict

steve1811uk

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On 12/19/2024 at 10:25 PM, steve1811uk said:

 

I could only find a pendant tube with 2.0 mm ext length, so it's a touch short and waterproofing is lost when the crown is pulled out to set the time. I will just have to keep my eye out for one that's longer. Couldn't be more pleased with the finished watch.

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tomh207 Distinguished Member

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Not sure what you mean by waterproofing is lost when the crown is unscrewed? All dive watches or water resistant chronographs carry a warning not to operate crown or pushers under water. The water resistance is only valid when the crown is fully screwed down.

 

Tom

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AndyGSi Distinguished Member

AndyGSi

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1 hour ago, tomh207 said:

Not sure what you mean by waterproofing is lost when the crown is unscrewed? All dive watches or water resistant chronographs carry a warning not to operate crown or pushers under water. The water resistance is only valid when the crown is fully screwed down.

 

Tom

It's not a screw down crown so only relies on the o ring as a seal and hence why it's only marked as waterproof with no depth rating.

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tomh207 Distinguished Member

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7 hours ago, AndyGSi said:

It's not a screw down crown so only relies on the o ring as a seal and hence why it's only marked as waterproof with no depth rating.

It’s the phrase “

and waterproofing is lost when the crown is pulled out to set the time.”  I am questioning Andy, no watch is water resistant when the crown is pulled out.

 

Tom

13 hours ago, steve1811uk said:

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Neverenoughwatches Distinguished Member

Neverenoughwatches

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11 hours ago, tomh207 said:

Not sure what you mean by waterproofing is lost when the crown is unscrewed? All dive watches or water resistant chronographs carry a warning not to operate crown or pushers under water. The water resistance is only valid when the crown is fully screwed down.

 

Tom

🤔That confused me as well, I know it doesn't take much, but that did it. 

The fact that the 2mm stem tube would be shorter than the original could well mean that the resistant crown gasket is less effective even when fully pushed in. 

Or is the stem gasketed ? Or both the stem and crown. If Mike's sticks out 2.6mm (I'm so resisting putting a smiling face here 😅 ) then another couple of mm at least would be needed to fit in the case then steve is needing 5mm to play with ( still resisting ) . 5mm to make adjustments to the correct length,  the only real requirement is the diameter of 2mm. 

Ah another read to understand Steve's comment on the waterproofing. At time setting some water resistance would still be active with the correct length tube if a stem gasket is still within the tube. Honestly though would still be a foolish thing to do...set the time within close proximity of water...why would you or even need to ? Or take that risk ?

Anyways? Good job Steve it looks smashing, the inner rotating time remaining bezel fascinates me. 

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steve1811uk WRT Addict

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1 hour ago, Neverenoughwatches said:

🤔That confused me as well, I know it doesn't take much, but that did it. 

The fact that the 2mm stem tube would be shorter than the original could well mean that the resistant crown gasket is less effective even when fully pushed in. 

Or is the stem gasketed ? Or both the stem and crown. If Mike's sticks out 2.6mm (I'm so resisting putting a smiling face here 😅 ) then another couple of mm at least would be needed to fit in the case then steve is needing 5mm to play with ( still resisting ) . 5mm to make adjustments to the correct length,  the only real requirement is the diameter of 2mm. 

Ah another read to understand Steve's comment on the waterproofing. At time setting some water resistance would still be active with the correct length tube if a stem gasket is still within the tube. Honestly though would still be a foolish thing to do...set the time within close proximity of water...why would you or even need to ? Or take that risk ?

Anyways? Good job Steve it looks smashing, the inner rotating time remaining bezel fascinates me. 

Thanks everyone. To clarify, there's just an o ring in the crown. The o ring does not sit around the tube when the crown is pulled fully out as the tube is 0.6mm too short (only 2.0mm long externally when the original tube is meant to be 2.6mm long)

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Neverenoughwatches Distinguished Member

Neverenoughwatches

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6 minutes ago, steve1811uk said:

Thanks everyone. To clarify, there's just an o ring in the crown. The o ring does not sit around the tube when the crown is pulled fully out as the tube is 0.6mm too short (only 2.0mm long externally when the original tube is meant to be 2.6mm long)

How did the tube insertion go Steve ? Does the shortness let the stem wobble when a bit when setting the time ?

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