A technical drawing of a mini boring bar with dimensional callouts.

Mini Boring Bars

Our Mini Boring Bars, available in both coated and uncoated options, are designed for precision in tight spaces and small-diameter applications, starting at a 0.015 minimum bore. Made with premium submicron grade carbide, these tools offer exceptional durability and strength. The flute is engineered for maximum strength, and the AlTiN+ coating improves surface finish and extends tool life. Perfect for intricate machining tasks, these mini boring bars provide reliable performance, tight tolerances, and superior results across various materials.

A (Minimum Bore)
B (Maximum Depth)
S (Shank Diameter)
OAL
Tool #Uncoated EDP #AlTiN+ EDP #
0.0150.0500.1251.50MB015050210001210071
0.0200.0750.1251.50MB020075210004210074
0.0250.1000.1251.50MB025100210007210077
0.0250.1250.1251.50MB025125210010210080
0.0300.1000.1251.50MB030100210013210083
0.0300.1250.1251.50MB030125210016210086
0.0300.1500.1251.50MB030150210019210089
0.0350.1000.1251.50MB035100210022210092
0.0350.1500.1251.50MB035150210025210095
0.0350.2000.1251.50MB035200210028210098
0.0400.1000.1251.50MB040100210031210101
0.0400.1500.1251.50MB040150210034210104
0.0400.2000.1251.50MB040200210037210107
0.0400.2500.1251.50MB040250210040210110
0.0450.1000.1251.50MB045100210043210113
0.0450.1500.1251.50MB045150210046210116
0.0450.2000.1251.50MB045200210049210119
0.0450.2500.1251.50MB045250210052210122
0.0450.3000.1251.50MB045300210055210125
0.0450.3500.1251.50MB045350210058210128