
GBP 57 Full profile Milling inserts for HPC indexable thread mills No. 218050 / 218054 Marking Sturdy milling inserts for high feed rates and high productivity. Note: Always fit the thread milling inserts with the marks matching, otherwise the thread will be distorted! (Sides have either a mark or no mark). Feed fz = HB 7720 in steel < 750 N/mm2 = 0.25 mm / tooth. Feed fz = HB 7735 in INOX > 900 N/mm2 = 0.15 mm / tooth. Suitable for/ vc [m/min] ISO code N N N P P P P P H H H M M S K N N HB 7720 - 140 120 80 120 110 100 80 60 80 70 40 70 120 120 ● ● HB 7735 - 120 110 100 80 60 25 20 80 70 70 120 ○ ● ● ○ ○ M M-LH MF MF-LH 60° 21 8057/8058 – Single-edged. 21 8060–8071 – Double-edged Application: 21 8057–8064 – For metric internal threads 60° to DIN / ISO R 262 (DIN 13) tolerance class 6g. 21 8070/8071 – For metric external threads 60° to DIN / ISO R 262 (DIN 13) tolerance class 6g. 21 8055_2 21 8061_2 21 8063_4 Insert size Pitch mm 0,5 0,75 1 1,25 1,5 1,75 2 2,5 3 3,5 4 4,5 5 5,5 6 mm 21 8057 HB7720 eShop eShop eShop eShop eShop eShop eShop eShop – – – – – – – 2 24 21D 21 8058 HB7735 eShop eShop eShop eShop eShop eShop eShop eShop – – – – – – – 2 24 21D 21 21 8060 HB7720 – – eShop – eShop – eShop eShop eShop – – – – – – 2 25 21D Milling insert for internal 21 8061 threads 60° HB7735 – – eShop – eShop – eShop eShop eShop – – – – – – 2 25 21D 21 8063 HB7720 – – – – – – – – eShop eShop eShop eShop eShop eShop eShop 2 41 21D 21 8064 HB7735 – – – – – – – – eShop eShop eShop eShop eShop eShop eShop 2 41 21D 21 8070 HB7720 – – eShop – eShop – eShop eShop eShop – – – – – – 2 25 21D Milling insert for external 21 8071 threads 60° HB7735 – – eShop – eShop – eShop eShop eShop – – – – – – 2 25 21D G BSW G-LH BSW-LH BSP BSP-LH 55° Double-edged. Application: For internal and external threads 55° to standard BS 84: 1956, DIN 259, ISO 228/1: 1982. Tolerance class Medium Class A. 21 8080 Insert size Threads per inch 11 14 mm 21 8080 HB7720 eShop eShop 2 25 21D Milling insert for internal and 21 8081 external threads 55° HB7735 eShop eShop 2 25 21D 354