Look at the pulleys - they should have indents showing the size and pitch.

Martin

On 7/3/2011 4:10 PM, Ignoramus16406 wrote:
My 6913 lathe is missing a ball chain. Its job is to pick up oil from
the bottom of the headstock towards the spindle gears and such.

My question is what ball chain to get at McMaster-Carr as a
replacement. Thanks