Feed up means employing planetary gear arrangement

A feed apparatus for radially moving a work engaging member such as a honing stone 88 on a honing mandrel 37 comprising a housing 24 having a drive member 32 rotatably mounted therein, the drive member having a first operative connection to a main drive motor and a second operative connection 60 to the honing mandrel, a peripheral gear 51 on the drive member in the housing, a planetary gear assembly mounted in the housing including a pair of axially spaced annular gears 30,32 one of 30 which has gear teeth formed on its outer surface, a worm gear 28 mounted on the housing for engagement with the gear teeth on the outer surface of the annular gear, an auxiliary drive for rotating the worm gear, a first set 50 of planetary gears engageable on one side with the peripheral gear and on the opposite side with one 52 of the annular gears, a second set 38 of planetary gears spaced axially from the first set and engageable on one side with the second annular gear 30, a member 42 for supporting the first and second sets of planetary gears, an adjustment member 58 mounted for rotation in the drive member, said adjustment member having a portion with a gear surface 55 thereon, and other gear members 56 operatively connected between the other annular gear and the gear portion of the adjustment member, energization of the auxiliary drive producing relative rotational movement between the annular gears and through the other gear members to the adjustment member thereby producing relative rotational movement between the adjustment member and the rotatable member.