54mm Forward Bulkheads for EX Hardware

54mm Snap Ring forward bulkheads. 50 going in for anodizing. Order 3 or more today and get 10% off. Ships next week. ORDER yours today!!! Offer good through 2/6/2019
USE Coupon code 10%OFF
*Note these are not for commercial hardware.
https://www.xpsrocketry.com/54mm-Fw-closure-for-Snap-Ring-Hardware-p126847138

Can you provide the largest OD of the bulkhead and also the OD of the liner step?
Thanks, Kurt

Coupon code doesn't work

JDcluster said:

Coupon code doesn't work

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Try again sorry about that.

Also for some reason my web page over charges for shipping on occasion. I will always refund the difference in shipping.

You could probably get these snap ring bulkheads to work in your threaded cases with some kind of threaded retaining ring. Any chance you are planning on upgrading your threaded forwards to have a liner shoulder?

AdAstraPerAspera said:

You could probably get these snap ring bulkheads to work in your threaded cases with some kind of threaded retaining ring. Any chance you are planning on upgrading your threaded forwards to have a liner shoulder?

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I haven't really thought about making a retaining ring. I think that adding a shoulder to the forwards on XPS motors would be a pain; trying to screw in a forward closure into a liner would be cumbersome at best.
Thanks for the questions

Placed an order. Nice to get a few cheap closures all the same. I have a mixed bag of brands so liner lengths vary for me.

cavecentral said:

Placed an order. Nice to get a few cheap closures all the same. I have a mixed bag of brands so liner lengths vary for me.

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Thanks Kevin, Ill send them out next week for you.

Just returned from anodizing. Extending the sale to 2/9
*Coupon code: 10%OFF
Order yours today!!!
* Purchase 3 or more to get 10% off.
https://www.xpsrocketry.com/54mm-Fw-closure-for-Snap-Ring-Hardware-p126847138

Do you have any plans to make closures where the liner step goes all the way into the o-ring groove?

Edward

AlphaHybrids said:

Do you have any plans to make closures where the liner step goes all the way into the o-ring groove?

Edward

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Never really thought about doing it that way. Do you want one that way?

AlphaHybrids said:

Do you have any plans to make closures where the liner step goes all the way into the o-ring groove?

Edward

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Some older closures I have do this. Not sure if it is better or worst design wise.

cavecentral said:

Some older closures I have do this. Not sure if it is better or worst design wise.

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I think it is worse, as it makes the o-ring more vulnerable to damage during installation of the closure and liner. Not enough that I worry about it, I have old Loki closures that are made this way and still use them, but I prefer the newer design as far as this feature goes.

Yeah, more damage possible. Harder to measure liner length. Might seal liner better. Not compressing it that way though.

I prefer it because it shortens the length of the closure. I haven't seen o-ring damage, though I typically don't run really high compression percentages on my closures.

How are the o-rings being damaged?

O-ring damage seems like a possibility during installation, not during the burn. If the o-ring gets pushed hard into the edge of the liner, it could get crushed the wrong way or cut.

Oh, I guess I didn't see that. I typically install nozzle, then slide the liner in with grains, then install the forward closure. I don't use the forward closure to push the liner in. I could see damage with the smaller -000 (0.070" wide) o-rings vs the -100 series.

Edward

Do these fit standard 54mm snap ring cases ( AMW Style ) ?

3stoogesrocketry said:

Do these fit standard 54mm snap ring cases ( AMW Style ) ?

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Yes

Just thought I would post my experience with XPS Rocketry. Nik promptly answered my many questions about the 54mm forward bulkhead. I received the bulkhead this week and its first class quality! It fits my Tru-Core casing and liners perfectly. Thanks Nik.

Kurt