hardinge dsm-59 spindle questions

[JohnnyJohnsoninWI]

I am working on a, new to me, Hardinge DSM-59. The serial number is DV-59-8756. On the chuck end of the headstock, there is some kind of thin slinger ring on the spindle. Behind it is the nose cap which is mounted to the headstock with three SHCS. I used to have a newer model DSM-59 and don't remember that slinger ring. Is it supposed to be there? How do I get it off?

On the other end of the headstock, I'm down to what you see in the picture. I downloaded a set of instructions for replacing the bearing on this lathe, but what I'm seeing isn't matching what I'm reading. How do I finish the disassembly? The lathe needs new bearings and belts.

When I started working on this machine, the locking nut shown in the picture was loose and there was only one screw holding the nose cap in place. It appears that someone has been here before me. I don't know how far they got or if they reassembled it in the correct order.

 

[L Vanice]

The slinger is a permanent part of the spindle. Here are pictures of a DSM threaded nose spindle and the spindle nose of an HSL, which is identical to the DV or DSM.

I do not use a punch and hammer on the spindle nuts. If a standard adjustable face pin spanner will not reach, I make a thick wall steel tube with two dowel pins to fit the nut. Then I use a hook pin spanner to turn the tube.

I did not find a free online parts list PL-13 for the DSM-59 s/n 7000 up, but Hardinge would probably give you one. I did find one for the HSL, which has the same spindle and bearings as the DSM, but a different pulley.

http://www.hardingeus.com/usr/pdf/PartsList/Turning/PL-9A-HSL-PARTS-LIST.pdf

Larry

 

[jim rozen]

You are lucky that the clamping ring on the spindle is loose. When assembled at the factory, those
are typically 'jesus tight.'

The nice thing about that version of the spindle is you can change the belts without removing
the spindle, they're hung on the outboard end.

To remove the clamping ring the spindle has to come out of the machine, it will hang on the
end of the spindle otherwise. Although somebody has indeed been 'into' this headstock as
the gap between the spindle OD (which you identify as a slinger ring) is way too big.

Really the backside of the 'slinger ring' on the spindle, and the front side of the clamp ring, form
a labyrinth seal to keep trash out of the bearings.

 

[L Vanice]

Hardinge made a vertical cutoff attachment for their lathes. It only works when using standard 5C collets (not jaw chucks). To attach it, you remove the three cap screws from the front bearing retainer. The cutoff slide body fits over the bearing retainer and is held on with three longer cap screws. There is a separate stamped sheet metal protector that helps to keep coolant out of the spindle bearings, but they are often lost.

Larry

 

[JohnnyJohnsoninWI]

Hi Guys,
Thanks for your replies. I have the spindle about two taps from coming out. Just need to recruit a spindle holder, so it doesn't drop. Is Alpine Bearing still the best place for new bearings? John