Our Metric CRT Holders bring the benefits of Coolant Ring Technology to your metric tooling setup. With full 360° coolant coverage, these holders improve chip evacuation and extend tool life. Made from heat-treated steel and secured with dual lock-down screws, they offer exceptional rigidity and reliable performance. Available in 12mm to 25mm shank diameters.

A technical drawing of a coolant ring technology (CRT) Tool holder manufactured by Scientific Cutting Tools

Coolant Ring Technology (CRT) Holders: Metric

A (Inside Diameter)S (Shank Diameter)H (Head Diameter)NPT ThreadOALTool #EDP #
0.125012 MM0.6251/8-27NPT2.84CRT12M-125200431
0.187512 MM0.6251/8-27NPT2.84CRT12M-187200434
0.250012 MM0.6251/8-27NPT2.84CRT12M-250200437
0.125016 MM0.7501/4-18NPT3.34CRT16M-125200440
0.187516 MM0.7501/4-18NPT3.34CRT16M-187200443
0.250016 MM0.7501/4-18NPT3.34CRT16M-250200446
0.312516 MM0.7501/4-18NPT3.34CRT16M-312200449
0.125020 MM0.8653/8-18NPT3.34CRT20M-125200452
0.187520 MM0.8653/8-18NPT3.34CRT20M-187200455
0.250020 MM0.8653/8-18NPT3.34CRT20M-250200458
0.312520 MM0.8653/8-18NPT3.34CRT20M-312200461
0.375020 MM0.8653/8-18NPT3.34CRT20M-375200464
0.125022 MM0.9373/8-18NPT3.34CRT22M-125200467
0.187522 MM0.9373/8-18NPT3.34CRT22M-187200470
0.250022 MM0.9373/8-18NPT3.34CRT22M-250200473
0.312522 MM0.9373/8-18NPT3.34CRT22M-312200476
0.375022 MM0.9373/8-18NPT3.34CRT22M-375200479
0.125025 MM1.1151/2-14NPT3.34CRT25M-125200482
0.187525 MM1.1151/2-14NPT3.34CRT25M-187200485
0.250025 MM1.1151/2-14NPT3.34CRT25M-250200488
0.312525 MM1.1151/2-14NPT3.34CRT25M-312200491
0.375025 MM1.1151/2-14NPT3.34CRT25M-375200494
0.500025 MM1.1151/2-14NPT3.34CRT25M-500200497