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Finally came in! Should I remove the protective plastics?

Fritz
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Related funny story... a few years back my Dad volunteered me for a brake service on his very old and mint SAAB 900. As he was in his late 80s I wasn’t going to argue And besides, it was a lovely thing to work on. Anyway, GM had long since shut SAAB down so parts were going to be fun to find. My dad said he’d take care of the parts and provide “supervision” as long as he didn’t have to creep about on the garage floor.

when I went over a week later to do the job he admitted he couldn’t find OEM components and asked if I thought that stuff on the bench would be okay...

On the bench was a massive pile of bright red Brembo boxes, all premium stuff. I told him that yeah, it should do okay.
 
BlackTalon
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JwRosenthal JwRosenthal
I can tell you live in the land of salted roads 😉
More like dust shields result in higher rotor temps -- anything to reduce the potential for brake fade is a good thing in my book. The shields also make it more of a PITA when replacing rotors.
 
schoolboy
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BlackTalon BlackTalon
More like dust shields result in higher rotor temps -- anything to reduce the potential for brake fade is a good thing in my book. The shields also make it more of a PITA when replacing rotors.

this rotor was actually very easy to replace.
I’ve done a few where you have to remove the caliper and wheel hub to remove the rotor

For this one, all I had to remove was the caliper.
 
X350 XJR
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Clearly not the ceramic version. 🙄
 
STANDY
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Shouldn’t it have a Delrin brake.......
 
BlackTalon
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STANDY STANDY
Shouldn’t it have a Delrin brake.......
Thankfully he has a model that is old enough that it came with the cast iron rotor. The delrin is notorious for increasing braking distances beyond manufacturer's specs. It does look prettier, though.
 
Walrus
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I ordered some for my wife’s car. Included free shipping. I don’t know how they made money on that order as those rotors were heavy as hec
 
MtnMarine
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It always nice to see these unpolished and in original condition......thanks for sharing! Lol
 
schoolboy
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X350 XJR X350 XJR
Clearly not the ceramic version. 🙄
This is actually a very neat comment considering that there are watches with ceramic bezel or with aluminum

just as there are brakes of different materials!

Love it
 
SkunkPrince
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schoolboy schoolboy
I don’t even know what that is.

There is a part in the 1861 movement made from Delrin, a type of plastic.

The 1863 movement has the same part made from steel behause morons object to plastic in their movements.

YES I SAID MORON SUCK IT UP BUTTERCUP!
 
JwRosenthal
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SkunkPrince SkunkPrince
There is a part in the 1861 movement made from Delrin, a type of plastic.

The 1863 movement has the same part made from steel behause morons object to plastic in their movements.

YES I SAID MORON SUCK IT UP BUTTERCUP!
Several broadcast grade turntable used delrin thrust plates since the early 60’s-under heavy platter bearings designed to run continuously. 60 years later they are still serviceable- it’s a great material.
 
schoolboy
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SkunkPrince SkunkPrince
There is a part in the 1861 movement made from Delrin, a type of plastic.

The 1863 movement has the same part made from steel behause morons object to plastic in their movements.

YES I SAID MORON SUCK IT UP BUTTERCUP!
Nice!

I had heard that the brake is different between 1861 and 1863 but had never heard of delrin
 
Pazzo
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schoolboy schoolboy
Nice!

I had heard that the brake is different between 1861 and 1863 but had never heard of delrin

It sounds better than plastic!
 
Archer
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schoolboy schoolboy
Nice!

I had heard that the brake is different between 1861 and 1863 but had never heard of delrin

"Delrin" is the marketing name...it's a trade name for a specific type of plastic. I've never actually seen this trade name used by Omega, so I don't know who first used the term. Delrin isn't anything special when it comes to plastics...

Here is the description of the part in question that Omega uses:

72208601726V2 | PLASTIC BLOCKING LEVER
 
JwRosenthal
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Archer Archer
"Delrin" is the marketing name...it's a trade name for a specific type of plastic. I've never actually seen this trade name used by Omega, so I don't know who first used the term. Delrin isn't anything special when it comes to plastics...

Here is the description of the part in question that Omega uses:

72208601726V2 | PLASTIC BLOCKING LEVER

Polyoxymethylene (POM), also known as acetal,[2]polyacetal, and polyformaldehyde, is an engineering thermoplastic used in precision parts requiring high stiffness, low friction, and excellent dimensional stability. As with many other synthetic polymers, it is produced by different chemical firms with slightly different formulas and sold variously by such names as Delrin, Kocetal, Ultraform, Celcon, Ramtal, Duracon, Kepital, Polypenco, and Hostaform.


POM is characterized by its high strength, hardness and rigidity to −40 °C. POM is intrinsically opaque white, due to its high crystalline composition, but it is available in all colors. POM has a density of 1.410–1.420g/cm3.[3]

Typical applications for injection-molded POM include high-performance engineering components such as small gear wheels, eyeglass frames, ball bearings, ski bindings, fasteners, guns, knife handles, and lock systems. The material is widely used in the automotive and consumer electronics industry.
 
Archer
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JwRosenthal JwRosenthal
Polyoxymethylene (POM), also known as acetal,[2]polyacetal, and polyformaldehyde, is an engineering thermoplastic used in precision parts requiring high stiffness, low friction, and excellent dimensional stability. As with many other synthetic polymers, it is produced by different chemical firms with slightly different formulas and sold variously by such names as Delrin, Kocetal, Ultraform, Celcon, Ramtal, Duracon, Kepital, Polypenco, and Hostaform.


POM is characterized by its high strength, hardness and rigidity to −40 °C. POM is intrinsically opaque white, due to its high crystalline composition, but it is available in all colors. POM has a density of 1.410–1.420g/cm3.[3]

Typical applications for injection-molded POM include high-performance engineering components such as small gear wheels, eyeglass frames, ball bearings, ski bindings, fasteners, guns, knife handles, and lock systems. The material is widely used in the automotive and consumer electronics industry.

Thanks, but I am quite familiar with Delrin and it's properties. I've bought enough of it for conveyor wear strips in my years in engineering to make a million brakes for Speedmasters. I know watch collectors love to make a big deal of this being some very special plastic, but like all plastics it has a particular set of properties that make it either suitable or unsuitable for different applications.

For example for wear strips I found it more useful than UHMW-PE because it was less likely to absorb oils and change dimensions (expand) and that caused a lot of problems with jammed up conveyors. But in other applications, UHMW-PE was better. In engineering, it wasn't seen as anything special, just another option out of many available to you depending on what was needed.

To me the "Delrin" brake (along with the "Hesalite" crystal) is sort of the "904L stainless" of Omega. People read far too much into it...
 
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