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General Category => General Discussion => Topic started by: rodekyll on August 27, 2017, 07:39:45 PM

Title: Metal/rubber sealing washers?
Post by: rodekyll on August 27, 2017, 07:39:45 PM
I'm looking to buy a quantity of sealing washers for various banjo-type fittings.  I see this kind of washer that Honda outboards have used for years on their outboard engine drain plugs.  It has a metal outer ring with a soft "rubber-ish" inner ring.  I suspect the soft material isn't actual rubber.  My question is:  Has anyone been using this type of washer to seal oil and brake banjos, and what has been your experience?
Title: Re: Metal/rubber sealing washers?
Post by: Matteo on August 27, 2017, 07:53:15 PM
Dave, I've been using those for a long time on my oil sump drain plugs, no leaks for years. Still using regular crush washers for my brake lines.
Title: Re: Metal/rubber sealing washers?
Post by: dxhall on August 27, 2017, 07:56:06 PM
I think I first saw that kind of washer in the Earl's catalog years ago.  They work well and, unlike crush washers, they can be reused.  My 2003 V11 Sport has them on the oil lines.  The 1997 Centauro has the simple crush washers.  We used the Earl's washers on the race cars all the time.
Title: Re: Metal/rubber sealing washers?
Post by: dsrdave on August 27, 2017, 08:11:00 PM
I don't like oil leaks, I use them all the time on my bikes.  Commonly referred to as a stat-o-seal.  Avail. From McMaster carr.
Title: Re: Metal/rubber sealing washers?
Post by: gearman on August 27, 2017, 08:16:53 PM
 :1:
I don't like oil leaks, I use them all the time on my bikes.  Commonly referred to as a stat-o-seal.  Avail. From McMaster carr.
Title: Re: Metal/rubber sealing washers?
Post by: guzziownr on August 27, 2017, 08:18:52 PM
I got a pair of these with my made-in-china brake line pressure switch.  I put them on and crossed my fingers.  One year in and no leaks.

YMMV  DW
Title: Re: Metal/rubber sealing washers?
Post by: Moto on August 27, 2017, 09:04:46 PM
I'm looking to buy a quantity of sealing washers for various banjo-type fittings.  I see this kind of washer that Honda outboards have used for years on their outboard engine drain plugs.  It has a metal outer ring with a soft "rubber-ish" inner ring.  I suspect the soft material isn't actual rubber.  My question is:  Has anyone been using this type of washer to seal oil and brake banjos, and what has been your experience?

I think you're referring to the type of washer (steel/rubber) that has been standard OEM-issue since, I understand, 2001 or so for Guzzi drain plugs:

http://www.mgcycle.com/index.php?main_page=product_info&cPath=34&products_id=52 (http://www.mgcycle.com/index.php?main_page=product_info&cPath=34&products_id=52)

If so, yes, they work well.

Moto
Title: Re: Metal/rubber sealing washers?
Post by: Antietam Classic Cycle on August 27, 2017, 09:09:41 PM
https://www.mcmaster.com/#93786A175 . Same catalog page has the other sizes.
Title: Re: Metal/rubber sealing washers?
Post by: rodekyll on August 27, 2017, 09:45:22 PM
Charlie, the washers I've been looking at are flat with a rubber insert as opposed to these "folded" ones in the MC catalog.  Do these folded ones crush to seal, or do you use less torque on the fitting and let the rubber, alone create the seal?

My primary use is the Convert loop fittings, 12mm and 14mm ID/32-ish# pressure relief/200f.
Title: Re: Metal/rubber sealing washers?
Post by: Antietam Classic Cycle on August 27, 2017, 09:51:08 PM
Charlie, the washers I've been looking at are flat with a rubber insert as opposed to these "folded" ones in the MC catalog.  Do these folded ones crush to seal, or do you use less torque on the fitting and let the rubber, alone create the seal?

My primary use is the Convert loop fittings, 12mm and 14mm ID/32-ish# pressure relief/200f.

I'm not sure what you mean by "folded", but the ones I linked to do not crush to seal. Less torque on the fitting, rubber does the sealing.

Title: Re: Metal/rubber sealing washers?
Post by: rodekyll on August 27, 2017, 10:11:31 PM
Less torque would be good.  I'm reefing on some of these fittings at fartnivorous torque.

I think you're referring to the type of washer (steel/rubber) that has been standard OEM-issue since, I understand, 2001 or so for Guzzi drain plugs:

http://www.mgcycle.com/index.php?main_page=product_info&cPath=34&products_id=52 (http://www.mgcycle.com/index.php?main_page=product_info&cPath=34&products_id=52)

If so, yes, they work well.

Moto


I see these recommended for drain plugs, but sealing pressure fittings is not mentioned in any descriptions.  Are you using them for oil banjos?
Title: Re: Metal/rubber sealing washers?
Post by: pete roper on August 27, 2017, 10:22:27 PM
David, over here they are known as Dowty seals or Dowty washers. Most hydraulic hose and pneumatic hose supply places will stock them.

Pete
Title: Re: Metal/rubber sealing washers?
Post by: ITSec on August 27, 2017, 10:56:27 PM

I'm reefing on some of these fittings at fartnivorous torque.


I checked my tool catalog, and I can't find a torque wrench calibrated in that scale...  :rolleyes:
Title: Re: Metal/rubber sealing washers?
Post by: rodekyll on August 27, 2017, 11:16:45 PM
The accent is on the 2nd syllable.  As in:  "The differential pinion bearing should always be torqued to the fartniverous before checking preload*."

It's that new-money scale:

nicensnug

gootntite

fartniverous

herniacious



*page 77
Title: Re: Metal/rubber sealing washers?
Post by: Yeahoo Whoyah on August 27, 2017, 11:23:21 PM
The accent is on the 2nd syllable.  As in:  "The differential pinion bearing should always be torqued to the fartniverous before checking preload*."

It's that new-money scale:

nicensnug

gootntite

fartniverous


herniacious



*page 77

Noteworthy, ha!
Title: Re: Metal/rubber sealing washers?
Post by: normzone on August 28, 2017, 12:06:43 AM
Thanks for explaining that - Google was giving me nothing for fartniverous.
Title: Re: Metal/rubber sealing washers?
Post by: Madtownguzzi on August 28, 2017, 01:18:53 AM
Toyota uses them for oil pan drain plug. The local dealer gives them to me when I buy oil filters for my daughters car.
Title: Re: Metal/rubber sealing washers?
Post by: rodekyll on August 28, 2017, 01:46:51 AM
Thanks for explaining that - Google was giving me nothing for fartniverous.

Google has a hard time keeping up with me.
Title: Re: Metal/rubber sealing washers?
Post by: tris on August 28, 2017, 04:14:28 AM
I don't think I've ever seen Dowty seals used on brake systems

I'd suggest that you check that the rubber used is compatible with brake fluid to be on the safe side
Title: Re: Metal/rubber sealing washers?
Post by: pete roper on August 28, 2017, 04:39:52 AM
I have seen them used in brake systems but myself prefer to use alluminium washers. Why? Just *Because*.......
Title: Re: Metal/rubber sealing washers?
Post by: dguzzi on August 28, 2017, 02:05:22 PM
Message me, I have some freebies for you...  In fact a lot of them, various sizes. 
Title: Re: Metal/rubber sealing washers?
Post by: twowings on August 28, 2017, 08:33:31 PM
David, I found these:



https://www.amazon.com/dowty-washer/s?ie=UTF8&page=1&rh=i%3Aaps%2Ck%3Adowty%20washer
Title: Re: Metal/rubber sealing washers?
Post by: rodekyll on August 29, 2017, 12:52:17 AM
I never think of Amazon for industrial stuff.