Ducati Monster Forum

Moto Board => Tech => Topic started by: He Man on September 10, 2009, 04:50:41 PM

Title: Headlight bolt washer
Post by: He Man on September 10, 2009, 04:50:41 PM
Does anyone know where i could find the washer for the 2 bolts that hold the headlights to the brackets? aside from duc dealer...

Is there a specific name for that conical washer?
Title: Re: Headlight bolt washer
Post by: Howie on September 11, 2009, 03:44:54 AM
No idea what they call it.  Your best shot for finding something similar would be Mcmaster Carr.  I would give Ducati Seattle, Commonwealth and BCM a call.  In the meantime a conventional bot and washer will work.
Title: Re: Headlight bolt washer
Post by: ducpainter on September 11, 2009, 03:49:32 AM
I believe it's called a belleville washer. The engineering of it sorta requires you use the one designed for the specific job.
Title: Re: Headlight bolt washer
Post by: Howie on September 11, 2009, 04:28:22 AM
Is it a Belleville washer or a flat washer that is conical on the outside with a recess for the bolt head?  Either I never noticed or I don't remember.  If it is a Belleville washer it has a hella lot more clamping power than a similar set up with a flat washer.  After trying to figure out how to describe one I decided it is time for a link.

http://en.wikipedia.org/wiki/Belleville_washer (http://en.wikipedia.org/wiki/Belleville_washer)

As a temporary solution I would still use a flat washer and bolt, but if the washer is a Belleville I would add a lock washer between the washer and bolt.
Title: Re: Headlight bolt washer
Post by: Simon on September 11, 2009, 05:53:47 AM
Found a pair at Ebay. Check it out.

http://cgi.ebay.com/ebaymotors/Headlight-Bucket-Mount-Bolts-Ducati-Monster-620-800-900_W0QQcmdZViewItemQQ_trksidZp4634Q2ec0Q2em14Q2el1262QQhashZitem2ea6d19e67QQitemZ200367251047QQptZMotorcyclesQ5fPartsQ5fAccessories (http://cgi.ebay.com/ebaymotors/Headlight-Bucket-Mount-Bolts-Ducati-Monster-620-800-900_W0QQcmdZViewItemQQ_trksidZp4634Q2ec0Q2em14Q2el1262QQhashZitem2ea6d19e67QQitemZ200367251047QQptZMotorcyclesQ5fPartsQ5fAccessories)

Title: Re: Headlight bolt washer
Post by: Rock Store on September 11, 2009, 08:23:30 AM
The washer in question is called a cup washer,strictly for cosmetic apperances,most commonly used on the Ducati fairing mounts,on 851-888 & 900ss ,although their are conical shaped on the ouside only this is for apperances,they come in silver,gold & TI,backed up with a nylon flat washer to save the paint,u like the Belleville washer that spreads certian torque loads when certian torque specs are applied,most commonly seen in our slipper clutches for clamping a specific load on the spider spring & distributing it evenly,also used in the new adler APTC clutch design and many others. later...RS
Title: Re: Headlight bolt washer
Post by: He Man on September 16, 2009, 12:49:04 PM
hey thanks for the link to ebay purchase. i searched on the internet, but ducpainter seems to be right. these are specifically engineered for ducati's headlights so i cant seem to find them anywhere.

But at the cost of shipping +$1 washer (and it woudlnt be the right one), i ended up getting 2 with bolts for $10w/free shipping!
Title: Re: Headlight bolt washer
Post by: ducpainter on September 16, 2009, 12:52:55 PM
Quote from: howie on September 11, 2009, 04:28:22 AM
Is it a Belleville washer or a flat washer that is conical on the outside with a recess for the bolt head?  Either I never noticed or I don't remember.  If it is a Belleville washer it has a hella lot more clamping power than a similar set up with a flat washer.  After trying to figure out how to describe one I decided it is time for a link.

http://en.wikipedia.org/wiki/Belleville_washer (http://en.wikipedia.org/wiki/Belleville_washer)

As a temporary solution I would still use a flat washer and bolt, but if the washer is a Belleville I would add a lock washer between the washer and bolt.
You're right howie. I went out and looked at mine over the weekend and it's not a belleville washer at all.