End Mill Holders

What to Look For

  • I.D. hole tolerance is H5
    (best in industry)

  • Balanced to 10,000 RPM to save spindle bearing life

  • Taper ground to AT3 for maximum spindle contact

  • Each holder lab certified for dimensional accuracy



Learn to check T.I.R. (runout)

You lose 10% of tool life
for every .0001" T.I.R. (runout)

Visit our toolholder guide for more information

Choosing the right holder for the job is key to your success

Endmill Holder Advantages

    • Wide variety of sizes to choose from

    • Accurate - manufactured to H5 precision

    • Good rigidity of cutting tool & holder assembly

    • Economical (no collets or nuts)

    Techniks bore tolerance is to H5 standards
    to extend cutting tool life up to 60%!

end mill holders diagram

Others T.I.R. 0.0008" – TECHNIKS T.I.R. 0.0001"

Gain 10% tool life for every 0.0001" improvement in T.I.R

The chart below shows the difference between manufacturers. To ensure proper fit the toolholder bore always has a minimum and maximum size (tolerance) for each shank size (bore I.D.)

Tool Shank
Dimension
Techniks
H5 Accuracy
Others
H7
Others
H8
.0937
.00015"
.00039"
.00055"
.125"
.00019"
.00047"
.0007"
.25"
.00023"
.00059"
.00086"
.375"
.00031"
.0007"
.001"
.675"
.00035"
.00082"
.0012"

Endmill Holder Maintenance

  • Keep bore, taper, spindle taper, and shanks clean. Dirt causes runout

  • Check T.I.R. periodically for wear

  • Replace holder if bellmouthing or excessive fretting is evident

  • Replace worn retention knobs to prevent toolholder from flying out of spindle during operation