Hitachi Sieki VS50 spindle tool clamp

[ozbob]

Hi all, my trusty old VS50 has developed some spindle noise. I think it is in the lower bearing (close to tool) but want to know if there are any bearings in the tool clamp on top of the spindle that I can check before sender her to scrap. The spindle still turns nice and smooth by hand.

 

[SeikiCorp]

You don't specify exactly what spindle you had. BT40, BT50, NC5. Speed 4500, 10000, 12000 Standard, 12000 High output, 20000 Etc... They made about 15 different spindles.

I attached some photos from the assembly book. I will assume it is BT40 12000. Coolant thru the knob. That was the most common at least in the USA.

There is a 'top' bearing that sits under the unclamp cylinder.
It is a roller bearing, not a ball bearing. See Photos.

 

[ozbob]

Sorry, has the BT50 4500 rpm spindle, coolant comes down the side into a block mounted on the spindle nose to give high pressure coolant for insert drills. Does it also have a top bearing?

 

[SeikiCorp]

Here is the BT50 / 4500 drawings.
Same basic design. Different bearings of course.

 

[ozbob]

T

Here is the BT50 / 4500 drawings.
Same basic design. Different bearings of course.

Thanks...I will check it out.