Attaching a disk to a spindle of a spinstand

摘要

Apparatus for attaching a disk 5 to a spindle 4 of a spinstand (1) includes a spindle 4 having a fluid pressure port 23 therethrough for delivery of fluid pressure. A spindle adapter 40 is adapted to be attached to the spindle 4 and for holding a disk 5. The spindle adapter 40 has a piston 55 movable therein to clamp a disk 5 between the piston 55 and an opposing surface 64 in response to fluid pressure applied through the spindle fluid pressure port 23. A disk 5 can be attached to the spindle 4 by offering the disk 5 up to the spindle adapter 40, and applying fluid pressure to the spindle fluid pressure port 23 to cause the piston 55 to clamp the disk 5 against the opposing surface 64. The disk 5 can then be spun up on the spindle 4. The spindle may be an inverted spindle and the lower most test surface of the disc registers against the top surface 63, 64 of the cap 60 which is registered against the spindle adaptor. The spindle adaptor provides a know z-height datum.