® Thread Whirling Tools Machine details and Whirling unit details are needed in order to offer a suitable toolholder. Machine Whirling Whirling Holder Insert Z D d1 Type Model Unit Ordering Code Size SRW4012 730 - 6 6 18W SR20 / ECAS20 Star 12 40 SRW4012 425 - 8 8 11W Star SRW4295 557 - 6 6 9.5 42 18W SR20 / ECAS20 WTO SRW4212 717 - 8 8 12 42 11W SRW4512 719 - 6 6 18W Citizen M20 / M32 PCM 12 45 SRW4512 427 - 8 8 11W * The above table serves as an example. Product Identification - Ordering Codes Toolholders SR W 40 12 730 6 Clamping Whirling Clamping Cutting Serial No. No. of Method Diameter Diameter Inserts Inserts 18W E L 1.75 SP BMA E = External Pitch Serial no. Insert R = Right Hand Standard Carbide size L = Left Hand ISO Grade: 11W UN K20 18W SP BMA A10-3