12-Pack Set 3 Boring Head R8 Shank 3/4 Carbide Boring Bar, Replacement for Bridgeport Milling

2" Boring Head R8 ShankSpecification：3" Boring Head0.0005/0-100 Graduation3/4" Boring Bar hole diameter3/4" Cross hole diameter1" maximum offset1-1/2"-18 thread sizeR8 shank can be fitted on a 2", 3", or 4" boring head with 1.5"-18 thread size12 PCS carbide tip boring bar set3/4" shank diameterShank Dia. 3/4"For R8 spindle machines Hardened and groundShank Diameter 3/4" 12 pcsWhen the direction of the dial is reversed, the backlash between the gear train is listed below.Overall Length --- Bore Depth --- Min. Bore3-1/8"---1-1/8"---7/16"3-11/16" ------ 1-11/16" ------ 7/16"4-1/4" ------ 2-1/4" ------ 7/16"3-1/2" ------ 1-1/2" ------ 9/16"4-1/4" ------ 2-1/4" ------ 9/16"5" ------ 3" ------ 9/16"3-7/8" ------ 1-7/8" ------ 11/16"4-13/16" ------ 2-13/16" ------ 11/16"5-3/4" ------ 3-3/4" ------ 11/16"4-1/4" ------ 2-1/4" ------ 13/16"5-3/8" ------ 3-3/8" ------ 13/16 "6-1/2" ------ 4-1/2" ------ 13/16"Package Includes：1 x 3" Boring Head1 x R8 Shank12 x 3/4" Carbide Boring Bar3 x Allen Wrench1 x Plastic Case

• 3 Boring Head With R8 Shank; Head size: 3 ; Boring bar Hole: 3/4 ; Cross Hole Dia: 3/4 ; Maximum Offset: 1.
• Tool set made of high quality steel with great match of hardness and toughness, thus prolongs its service life.
• A micrometer lead screw provides 0.0001 direct reading accuracy and ease of adjusting.
• Double bar holder permits a greater boring range with out an extreme offset condition.
• Packing including: 1 x 3 Boring Head, 1x R8 Shank, 12 x 3/4 Carbide Boring Bar, 1 x Allen Wrench.