Valve seat grinding tools

[korremann]

Hello

As showed in the "Instandsetzungssanleitung" for the R25 a 45 and 15 degree, 36 mm grinder is needed for grinding the valve seatings.
Does anyone knows where to buy this??

Bjarke

[korremann]

[Ben Friedl]

Bjarke, are you talking about a valve seat cutter? To get those valve angles a number of cutters are used for the correct angles. If you want to just "dress" the valve seats you could buy them but it would probably be easier and cheaper to take it to a machinist.
If your just talking about lapping the valves in, then the lapping tool and lapping paste should be available at just about any good auto parts store.

Ben

Hello

As showed in the "Instandsetzungssanleitung" for the R25 a 45 and 15 degree, 36 mm grinder is needed for grinding the valve seatings.
Does anyone knows where to buy this??

Bjarke

[korremann]

Hi
Yes I´m talking about a valve cutter. Im sure a machinist could do the job pretty cheap, but I have 3 bikes and want to do the job myself, for the fun of it.
But I can´t find any cutters with the correct angles and mm.

Bjarke

[Rütz]

Hi Bjarke,

the usual tool is this:
http://www.ludwig-hunger.de/_produkte/v10/v3-vds1a.html
They have an adress in Danmark too:
http://www.ludwig-hunger.de/_kontakt/vertretungen.html

Just now, there is one on Ebay:
http://cgi.ebay.de/Hunger-Ventilsitz-Drehgeraet-VDS-1A_W0QQitemZ320221413525QQihZ011QQcategoryZ30922QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
But it doesn't seem to be complete enough for yor purpose.

Grets Rütz

[sigi_rs]

Hi Bjarke,
I had the same problem. But when I saw the price of the Hunger-Ventilsitzdrehwerkzeug, I looked for an other possibility. So I bought some valve cutters from Neway. They are cheaper than the Hunger-Tools but work fine. I repaired my first cylinder head a week ago and have now the feeling, that I have a new motorcycle.
http://www.oko-werkzeuge.de/oko/?Produkte:Motoreninstandsetzung:NEWAYor look at Neway
http://www.newayts.com.au/seatguiderest.htm

I bought valve seat cutter no. 620 and 212.

The pictures show some impressions.

Greetings from Remscheid
Jörg

[† Knut]

Hey Jörg,

good job, the seating really looks like brand new.

I think that's an item for "Tipps and Tricks", isn't it? Can you give us a feeling for the prize of this tool?

Cheers

Knut

[sigi_rs]

Hi Knut,
my intention for the near future is a picture story about refreshing of a cylinder head. I built some clamping and mounting tools for valve guiding change and valve seat cutting and had made a lot of pictures, but this will last a little time until I have more time to write the text.

The cutting tool consists of two cutting heads with knifes for 45, 75 and 15 degrees, a pilot guiding shaft, which is mounted in the new valve guiding bushing and a t-shaped handle to rotate the cutters. The cost for all the parts is approx. 380,-- Euros (I know, this is a lot but I want to do this work by myself).

Greetings,
Jörg

[korremann]

Hi

Thats look absolut perfect, and your right Hunger is extremly expensive. I have just talket to a danish toolshop and for a complete set to BMW they wanted - an hold on- 1275 euros !!! Neway seems to be the way to go!


Bjarke