Bicycle Mechanics - Mavic BB chamfering tool instructions or pictures?

Hi. I am looking for pictures of a properly assembled Mavic BB chamfering tool. The one that cuts a taper in the BB shell to use the threadless Mavic bottom bracket.

I think I have all the parts to it here and possibly some extras that are causing confusion. I would love to see pictures of the whole Mavic tool kit that came in the plastic case, and descriptions of what all the pieces/parts are for.

Or perhaps a lead in the right direction, I can't seem to find any scans or .pdf files of the directions.

Thanks for any help!

It fits on the standard campy facing tool as a die. Turn until chamfer is complete. GG.

Well I have what I think is a complete tool, not just the cutter. So I don't need a campy facing tool to make it work. But it doesn't use threaded guides like the campy tool. Anyhow if somebody can scan some old directions for me it would be helpful.

You mean like this?

http://i42.photobucket.com/albums/e346/DannoXYZ/Cycling/MavicBBchamferTool.jpg

I think that answers my question. I have two extra collars with set screws on the shaft between the spring and the knurled collar that fits in the BB shell. From that picture it looks like they should not be there at all, kinda what I figured...

Another question comes to mind though. The cutter on my tool is shiny gold nitride coated. Is this a replacement cutter or did some of them come like that? Not that it will get used a million times but I had heard you can't have gold coated cutting tools sharpened.

Titanium-nitride coating is very hard, but typically a sign of lower-quality tools because it's used to cover softer steel. Higher-quality parts use cobalt-steel throughout. That allows sharpening later. If the ti-nitride coating wears off, there's nothing hard underneath that would become the new cutting edge when the tool is sharpened. Are you sure you've got the genuine Mavic tool? Is there a part#?

Not sure the cutter is genuine Mavic, although I can't imagine anybody making after market cutters for something so obscure. It looks exactly like that picture except the cutter is bright shiny gold color.

Titanium-nitride coating is very hard, but typically a sign of lower-quality tools because it's used to cover softer steel. Higher-quality parts use cobalt-steel throughout. That allows sharpening later. If the ti-nitride coating wears off, there's nothing hard underneath that would become the new cutting edge when the tool is sharpened. Are you sure you've got the genuine Mavic tool? Is there a part#?

Stick to posting about things you know something about.

TiN is used on over 85% of the cutting tools used in industry today, and generally applied to top quality commercial/industrial grade high speed, cobalt and carbide tools and inserts. Factories doing production work spend fortunes on cutting tools and do cost/benefit studies to keep production costs at a minimum, and you can be sure they wouldn't waste dough on something that didn't save more than it cost. BTW, TiN coated tools can be resharpened leaving the coating on the wear face if done properly.

Your post insults the intelligence of anyone with knowledge of metal cutting technology. While it's high cost originally kept TiN from being used on low cost tools, costs have come way down so today it is also being applied to dress up lower quality tools, and so can't by itself be used as a guide to quality, either way.

As to the OPs Mavic BB tool.
Odds are that it's an original Mavic cutter or complete tool that I sold back in the day. I've been selling frame cutting tools to builders and shops for 30+ years, and in the early days of TiN started having cutters coated as an option for my clients. Many builders are still using TiN coated tools I sold hem, and they also wouldn't have spent the difference unless there was a payoff in longer tool life.

To the OP A few notes on using the tool.
No pilots are needed because the tool is self-centering. Use good quality oil-based cutting oil matched to the frame material. For steel that means sulphurized oil available at a plumbers or industrial tool supply, for aluminum, kerosene with 5% -10% oil mixed in to improve the finish. Use enough cutting pressure to form chips that curl for about one turn, or look like little nines. Chamfer the BB leaving slightly over 1mm at the rim of the face uncut. As you come to final depth ease off the compression spring to ramp out leaving a smooth edge without cutter end marks.

If you have other questions feel free to email me at info@[the site below my signature]

Thanks for the information, sounds like the cutter was coated. I always wondered about those coatings. Every so often you see a Campy tool kit for sale on the fleabay and all the cutters will be coated. Sounds like they ordered them that way or had them done later to make them last longer?

There are services where you can send your cutting tools to get coated and sharpened. They typically contract them out in batches. The coating improves surface-hardness of the tool (the actual amount varies depending upon what's underneath), reduces surface-temps when cutting and gives you 3-4x longer tool durability.