I got the number out of my G1006/G1007 instruction manual .. it's shown in the break-down of the spindle as number 308 - which is a spacer that goes between the bearings. Pete mentions making one, but for $4.25 I thought I'd take a chance on this one. Can't tell you it's going to be the right length though. If it's too short I'll make an additional spacer to add to it, if it's too long I'll cut it down to the right size. I'm waiting until the parts show up & I get the head all torn down to order the correct bearings.