H5 Toolbits

Eclipse Boring Bars and Tool Bits are manufactured from 5% Cobalt High Speed Steel for the professional engineer
  • Manufactured from high quality steel containing 5% Cobalt
  • Diameters quoted are approximate, actual diameters being slightly more than the nominals quoted
  • We recommend that tool bits be ground under a copious flow of coolant to prevent build-up of heat
  • 5% Cobalt content to give optimum hardness, grindability, and cutting performance
  • Square tool bits may be used in lathes and shaping machines
  • Round tool bits may be used in internal boring bars and slotting machines
  • All tool bits are manufactured to ISO5421
  • CodeDescription DimensionsLengthPack sizeBarcode
    TD109R/10H5 Toolbit 1/4" SQ X 3"6.4mm (1/4")76mm (3")105012095002079
    TD111M/10H5 Toolbit 1/4" SQ X 4"6.4mm (1/4")102mm (4")105012095002086
    TD149M/10H5 Toolbit 5/16" SQ X 3"7.9mm (5/16")76mm (3")105012095002093
    TD151N/10H5 Toolbit 5/16" SQ X 4"7.9mm (5/16")102mm (4")105012095004301
    TD189N/10H5 Toolbit 3/8" SQ X 3"9.5mm (3/8")76mm (3")105012095002109
    TD191W/10H5 Toolbit 3/8" SQ X 4"9.5mm (3/8")102mm (4")105012095002116
    TD195C/10H5 Toolbit 3 8" SQ X 6"9.5mm (3/8")153mm (6")105012095609964
    TD271F/10H5 Toolbit 1/2" SQ X 4"12.7mm (1/2")102mm (4")55012095002123
    TD275B/10H5 Toolbit 1/2" SQ X 6"12.7mm (1/2")153mm (6")55012095004318
    TD311E/10H5 Toolbit 5/8" SQ X 4"15.9mm (5/8")102mm (4")55012095004325
    TD315M/10H5 Toolbit 5/8" SQ X 6"15.9mm (5/8")153mm (6")55012095004332
    TD351R/10H5 Toolbit 3 4" SQ X 4"19mm (3/4")102mm (4")55012095002130
    TD355N/10H5 Toolbit 3/4" SQ X 6"19mm (3/4")153mm (6")55012095004349