Text Box: TSD's can be molded into matrix bits without the design limitations of PDC cutters. You can put almost twice as many 1/4" TSD's in a mill than 1/4" PDC's. The biggest holdback to TSD's are that they cannot be refit, but that is offset somewhat because they are less expensive than PDC cutters. Text Box: When a milling target proves too abrasive for PDC Cutters but you want to mainatain the same type of aggressive cutting action, then the 1/4" round TSD can be used to good advantage. This cutters type is synthetic diamond like PDC cutters but without the carbide backing and thermal limits of the PDC.

Standard Thread Makeup Torque Shank Dia Bit Size
1" AMMT 400 ft-lbs 1 9/16" 1 3/4" to 2 5/16"
1 1/2" AMMT 675 ft-lbs 2" 2 3/8" to 3 3/8"
2 3/8 API Reg 3,100 ft-lbs 3 1/8" 3 1/2" to 4 1/2"
2 7/8 API Reg 5,900 ft-lbs 3 3/4" 4 5/8" to 5 3/8"
3 1/2 API Reg 9,850 ft-lbs. 4 1/2" 5 1/2" to 9 3/8"
4 1/2 API Reg 21,000 ft-lbs 6 1/2" 9 1/2" to 14 1/2"
6 5/8 API Reg 47,800 ft-lbs 8" larger than 14 1/2"