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Greetings,

The machine that this post refers to is a Van Norman No.12 machine that once served on the Bethesda Naval base. It is well used and worn but everything save the coolant pump system works on it.

I have searched and searched the internet for a long time and have yet to find a PDF of a "service" manual for my? VN12.

I am looking for service specifications so that I can remove the Spindle head clean and adjust bearing clearances to what they are supposed to be.

I have checked my 5v spindle taper and it has 0.002" to 0.003" of radial runout. The spindle also moves a few thou if I give it lateral force with my hand. Needless to say one tooth? is always taking a deeper cut than the rest and tool life suffers and surface finish not to mention squareness is less than desirable.

If someone could point me in the direction of a service or military manual for the Van Norman No.12 machines or even for a machine of similar head design I would greatly appreciate it.

I also understand that there is a possibilitity that the runout may not be fully remedied by servicing the head, but I want to give it the best chance it has.

I have a full cabinet of arbors, collets, holders and cutters for it. It would be a shame to put this machine to rest.

I found a fair amount of info on the site. Free but take donations. I don’t have my VN 12 anymore but good machine.?

John in Mn

On Mon, Dec 12, 2022 at 10:23 AM Etienne <evanwyk28@...> wrote:

Greetings,

The machine that this post refers to is a Van Norman No.12 machine that once served on the Bethesda Naval base. It is well used and worn but everything save the coolant pump system works on it.

I have searched and searched the internet for a long time and have yet to find a PDF of a "service" manual for my? VN12.

I am looking for service specifications so that I can remove the Spindle head clean and adjust bearing clearances to what they are supposed to be.

I have checked my 5v spindle taper and it has 0.002" to 0.003" of radial runout. The spindle also moves a few thou if I give it lateral force with my hand. Needless to say one tooth? is always taking a deeper cut than the rest and tool life suffers and surface finish not to mention squareness is less than desirable.

If someone could point me in the direction of a service or military manual for the Van Norman No.12 machines or even for a machine of similar head design I would greatly appreciate it.

I also understand that there is a possibilitity that the runout may not be fully remedied by servicing the head, but I want to give it the best chance it has.

I have a full cabinet of arbors, collets, holders and cutters for it. It would be a shame to put this machine to rest.

Greetings,

The machine that this post refers to is a Van Norman No.12 machine that once served on the Bethesda Naval base. It is well used and worn but everything save the coolant pump system works on it.

I have searched and searched the internet for a long time and have yet to find a PDF of a "service" manual for my? VN12.

I am looking for service specifications so that I can remove the Spindle head clean and adjust bearing clearances to what they are supposed to be.

I have checked my 5v spindle taper and it has 0.002" to 0.003" of radial runout. The spindle also moves a few thou if I give it lateral force with my hand. Needless to say one tooth? is always taking a deeper cut than the rest and tool life suffers and surface finish not to mention squareness is less than desirable.

If someone could point me in the direction of a service or military manual for the Van Norman No.12 machines or even for a machine of similar head design I would greatly appreciate it.

I also understand that there is a possibilitity that the runout may not be fully remedied by servicing the head, but I want to give it the best chance it has.

I have a full cabinet of arbors, collets, holders and cutters for it. It would be a shame to put this machine to rest.

Also a few ownerson the site… or there were in the past, very helpful?

On Mon, Dec 12, 2022 at 11:30 AM John Vandewege via <larjjohnv=[email protected]> wrote:

I found a fair amount of info on the site. Free but take donations. I don’t have my VN 12 anymore but good machine.?

John in Mn

On Mon, Dec 12, 2022 at 10:23 AM Etienne <evanwyk28@...> wrote:

Greetings,

The machine that this post refers to is a Van Norman No.12 machine that once served on the Bethesda Naval base. It is well used and worn but everything save the coolant pump system works on it.

I have searched and searched the internet for a long time and have yet to find a PDF of a "service" manual for my? VN12.

I am looking for service specifications so that I can remove the Spindle head clean and adjust bearing clearances to what they are supposed to be.

I have checked my 5v spindle taper and it has 0.002" to 0.003" of radial runout. The spindle also moves a few thou if I give it lateral force with my hand. Needless to say one tooth? is always taking a deeper cut than the rest and tool life suffers and surface finish not to mention squareness is less than desirable.

If someone could point me in the direction of a service or military manual for the Van Norman No.12 machines or even for a machine of similar head design I would greatly appreciate it.

I also understand that there is a possibilitity that the runout may not be fully remedied by servicing the head, but I want to give it the best chance it has.

I have a full cabinet of arbors, collets, holders and cutters for it. It would be a shame to put this machine to rest.