9/16 to 21/32″ Expanding Mandrel Set with 6″ Length of Arbor and 2-3/4″ Length of Sleeve ~ 2 pieces per set. ~ Made of 64Mn high grade tool steel. ~ Precision ground and heat treated for maximum concentricity and holding power. ~ Arbor hardness is HRC55-60 and sleeve is HRC44-48. ~ Center holes are ground and lapped. ~ The automatic expansion feature can be utilized on any bore (standard or non-standard) within the range of the mandrel. ~ Arbors are tapered and sleeves are flexible. ~ Size is obtained by moving the sleeve along the arbor. 2 pieces per set. ~ Made of 64Mn high grade tool steel. Precision ground and heat treated for maximum concentricity and holding power. Center holes are ground and lapped. The automatic expansion feature can be utilized on any bore (standard or non-standard) within the range of the mandrel. Arbors are tapered and sleeves are flexible.
