if you found that washer, I'd love to get let me know, thank you for responding
 

I'd would love to get that, if you had any luck finding it.
thank you

Hello mate, I'm only just replying to a s**tload of unanswered emails, because my previously reconstructed right ankle recently suffered a rather catastrophic failure & thus I've only just been discharged from hospital & am getting back to everyone - fun & games, eh?! So, while I've not yet had an opportunity to search for the spare 'washer' for 851/801 rear mech's, we're expecting 36, 35 & 37 degrees respectively down here in Melbourne over the next 3 days & while I'll only be able to hobble about upon my crutches, I will most definitely have a thorough search for it. My apologies for my belated reply (almost a week now) but between the operation & being rather peeved about my situation (understatement of the year, although we're only 2 1/2 weeks into 2018!), I didn't even want my laptop while I was in hospital!

Cheers & best wishes for now from "Down Under"...Matt.

PS. And if I see someone else upon eBay Australia, UK or US who is selling one of these 'washers', I'll be sure to notify you of that/those as well!

sorry to hear about the ankle....
 

there's no rush, take care of yourself (the last thing you need is to trip or stumble looking for something so small and insignificant) I've been watching the tour down under, just to get my Phil Liggett (sp?) fix, Sagan looked destroyed after stage 4 so I knew about the heat. Try to stay cool, best wishes. chuck

G'day again, Chuck!

Thanks so much for your compassionate message - it truly shows that you're a great guy, mate, putting my welfare before my finding the Mavic 851 RD 'washer'! But funnily enough, while going through my one of my huge plastic containers of Dura Ace 7402/03 components this afternoon, I looked to my left & saw one of my 3 massive Mavic components containers & thought "Why not have a quick look?"!! And sure enough, one of the first things that I saw was my spare 'washer', which is not only a NOS/unused 'washer' but an original Mavic version, rather than a reproduction!! However, the big killer now is the fact that worldwide shipping (with tracking & signature upon receipt) of anything that weighs 500 grams or less costs around $30 AUD, varying slightly from country to country. Just last week, I posted a NOS Dura Ace HP-7410 25th anniversary headset top locknut to an eBay buyer in France & despite its incredibly low weight, it would have cost $28 And to post it to him. So without telling him just yet, I decided to risk it & post it to him for a mere $5 AUD - without tracking or signature upon receipt - & once he receives it, I will refund him $20 AUD postage.

As for the TDU, I've had so many friends & family from all around the world contacting me re: the race over the past week but as it's been incredibly hot down here in Melbourne (the major Aussie city to the east of Adelaide, South Australia), the last thing that I wanted to watch during that heat was other people suffering within that heat, together with the fact that my preferred cyclist - "Super Sagan" - was shattered by the midway point, as you mentioned. And perhaps a little of the "velo snob" within me is more interested in the European classics, grand tours & the Worlds each year than our own World Tour race, although I'm proud of the fact that we now have one! Oh, & you did spell Monsieur Liggett's name correctly, btw!!

And speaking fo the heat, it's going to be between 38 & 40 degrees down here in Melbourne over the next 5 days, so there will be no respite for the tennis players at the Australian Open, which comes to its conclusion this coming Sunday. And seeing as though I was a ballboy at 3 editions of the tournament, I can confirm just how much hotter the on-court temperature is!!

Cheers & best wishes for now from "Down Under", champion...take care, mate...Matt.

851 derailleur part
 

thanks for getting back to me, and good morning tomorrow (that pesky international date line-the one thing actual globes are good for-I actually went to school for geography) hope the throbbing has been reduced to a duller pain, I've only broken ribs, noses, fingers(s) and a shoulder. It was 50 F here on saturday, so I got out for a ride, It was a nice treat and I needed it, but I was in sorry shape, I did half of my normal 2 hour summer ride and was riding the struggle bus as some of my friends say. Thank you for looking for the mavic part, if you want to post it on ebay I'll keep an eye out for it. I'll probably opt for tracked/insured as I remember once waiting for something very important that never actually got to me, and it was local. let me know how you would like to proceed and thank you.

I know it's an old thread, but I wanted to weigh in WRT doing one of these plates in aluminum.

It seems to me that MAVIC would have done that if it would have worked. They over-engineered every other part of this derailleur, so there have to be reasons they went to the trouble of having it precision stamped and punched of stainless steel, and all the extra work that requires, if an alloy plate would do the job much less expensively.
Two reasons I can think of:
1) Obviously aluminum is not as strong as steel, so it would probably break pretty quickly.
2) This plate does more than just provide the stop for the forward swing. It also acts as a spacer between the upper knuckle and the hanger. Moving back and forth, an alloy one would wear away pretty quickly and introduce slop into the system.
FWIW I tried to make one myself out of stainless, a few years back. It functioned acceptably. But it was a ton of work and wasn't exactly the perfect thickness.

I think I could have made one of these plates with a file and a hammer in much less time than the responses back and forth. It is a really simple piece of bent steel with a hole in it. With power tools most handy people could make one in an hour.

no title
 

I like my wheel, I love my frame. I don't have a press brake in my basement(Metal shop in junior high-was a long time ago) I imagine these mount washers were stamped and bent then heat treated. the reproductions may not have been properly hardened. I'd rather let my der. sit in a box than destroy it, and my wheel and my frame. because that would suck (on top of that I'd probably get run over by a car).

This part is a replacement for the tiny B screw most derailleurs have - it is not under much stress. Given that it is 1/16" thick steel and the way it is constructed, I would greatly doubt it is heat treated or even made of a steel that can be heat treated.

By all means use the stock part if available. But if it isn't, you don't need to go to NASA to reverse engineer one.

just the punching and bending it work hardens the steel * ,,

Campag Record of the same era did not have a B screw and its upper bolt was a loose parrt too,,


* Looked up old shop shop manual the Mavic part number was 801 034 BITD.. (have a 851 & 801/803, long cage triple wrap up)



B screws were added when the upper bolt was surrounded by a spring ..Though my 1975 <C> Rally initially has an upper spring no B screw ...

the 1 chain tension pulley spring was sufficient way back then on the race RD.... later Rally just used the longer pulley cage



..

803?
 

if you have any thing re:803 long cage triple would you share any info?here?velobase?
I've seen one once, the owner wanted $300, I actually thought about it... then said i no I can't swing that.
I've only seen wording reffering to a complete touring group in a 84/85 catalog at Disraeli Gears(which is amazing) I would love to see anything you have.

It's actually stainless, and 2mm (0.0787"), and that matters, because it's not just a stop, it's also a spacer. If you use 1/16" (1.6mm) you need to shim it (ask me how I know.) You could probably get away with 0.080". Might need a bit of filing to keep from binding but I doubt it.
These do break of course, so something nicer than plain low-carbon steel would be best, IMO. If you can't get stainless, it wouldn't be a bad idea to make the stop tab a bit wider than original.

McMaster has 2mm steel sheet. See https://www.mcmaster.com/#6775t27/=1beew9c
Not stainless, not high-carbon, but inexpensive, easy to form, and will be dimensionally correct where it matters. Can be hardened with a crude heat treatment if you have an oxyacetylene torch. It will do the job.

803
 

803 018 is just a longer cage version of piece 801 018.. 851 018 just adds a white line on the black piece..

it something I got from Mavic as spare parts 35+ years ago .. you are bidding against collectors I suppose..




:innocent:

I did not realize Disraeli had so much on Mavic. I just did a quick look but could not locate a group. The Mavic SSC group that is all stamped "Mavic SSC" like the SSC 86' wheels are? Hubs, brakes, FD, chainring, crank bolt caps, skewers...I cannot locate anywhere.

I wasn't presenting tech specs. I was just pointing out that it is moderately thick steel. 301 stainless is likely what it was made of, and that doesn't have enough carbon to heat treat.

If you wanted to heat treat the tabs, you could do it with a propane torch. But that just increases the chance of them breaking unless you're going to also temper it at a fairly high temp.

If you couldn't get 2mm stock, a thin washer could be used to make up the difference. It is more important that it doesn't bind than it having zero play.

Yeah I was just following up with the tech specs in case someone actually wanted to make one. You wouldn't need to heat treat the stainless even if you could, it's strong as it is, and cold working it makes it harder. But mild steel is a bit more, er, mild.
It's a small enough piece that you could probably do the whole thing with propane. Gonna take a while though. An oxyacetylene flame will get it to temp and hold it easily. If you really want to try, heat until bright red, hold just until it turns orange, then quench (probably best in oil). Then temper by reheating to a light straw color.

If that all sounds like a PITA it's because it kinda is unless you happen to have the right stuff. It's not really necessary. As long as you use the right thickness material it will do the job, as I said.
That's what I did with my prototype homemade one. But I was still concerned about the stop tab being strong enough. So I didn't use it for long.

If I ever run across a piece of .080"/2mm stainless I'm going to make a few of these. Maybe sell them on eBay.

You could have 20 of the shape laser cut for relatively cheap, if you think there's a profit to be made. ;)

If I do it, you get one for free for hatching the idea.

I could wear it on a necklace - I try not to buy weird stuff with missing parts for exactly this reason. This part is one of the few bike specific small parts you can knock out at home.


Just had a great ride on my Mavic Lemond today.

brother could you spare an 801034, or a repro, pretty please,pretty pretty please....
 

actually a french braze on style front derailleur mount is really a work of art(mount a stone where it would mount to the frame for balance, use the limit screws to somehow attach it to a necklace and I guess I'd call it a pendant, sell it to a hipster (I have actually heard of an engagement bike-overheard in bar-wow that town has changed).I just need to stop looking at peugeots (sp)
my metal working experience is limited to jewelry(but that was 20 years ago).I was hoping to find someone that bought some of the repro mount washers that were available last year on ebay and could spare one (or the maker-Ghrumpy?!). It's good to know it's 2mm stainless.Anyone seen the 3d printed titanium lugs some people have on pinterest-talk about bling-no you made it, you ride it and yes nail that pothole, I want to see what happens.