
GBP 57 Holder for carbide inserts (axial grooving) L L1 With through-coolant and adjustment screw for positioning the tools. Suitable for: Cutter inserts No. 274061 and 274063. ⌀d ⌀ DS ⌀ D1 ⌀ DS 27 4100 27 4102 L L1 ⌀ D1 Clamping screw Adjustment screw 21U 21U Holder for carbide inserts mm ⌀ d = 6 mm ⌀ d = 8 mm mm mm mm 16 eShop eShop 88 19 20 279815 15 279815 16 20 eShop eShop 88 19 20 279815 15 279815 16 D2 D1 Carbide inserts for axial grooving With through-coolant and additional flank face cooling. Suitable for: Toolholder No. 274100 – 274102. Attention: Order size = minimum groove ⌀. 27 4061 Larger groove diameters can be achieved without modification. w D1 = Dmin internal diameter. L L3 t D2 = Dmin external diameter. L version with greater grooving depth tmax. R 0,2 ⌀ DS Suitable for/ vc [m/min] ISO code N N N P P P P P H H H M M S K N N 27 4061/4063 50 90 70 55 55 50 40 35 45 45 25 55 50 ● ● ⌀ Dmin groove D1/D2 27 4061 27 4063 ⌀ Ds w L3 L tmax f 21L 21L Carbide inserts for axial grooving mm right-hand left-hand mm mm mm mm mm mm 8/12 eShop eShop 6 2 1.7 64 15 0.01 – 0.03 8/12L eShop eShop 6 2 1.7 64 22 0.01 – 0.03 7/12 eShop eShop 6 2.5 2.2 64 22 0.01 – 0.03 14/20 eShop eShop 8 3 2.5 64 27 0.01 – 0.03 14/20L eShop eShop 8 3 1.6 80 43 0.01 – 0.03 12/20 eShop eShop 8 4 1.6 80 43 0.01 – 0.03 27 3963 Boring bars for axial grooving ■ Carbide insert screwed on to the end face, positive force transmission due to end face serrations. ■ Insert change is very easy to handle. 27 3966 27 3969 – Elliptical profile for very high flexional resistance. 27 3966/3969 – Low-vibration carbide shank with soldered steel head and hardened insert seat. 27 3969 L 27 L1 L2 ⌀ DS Shank ⌀ DS / over- 27 3963 27 3966 27 3969 L2 L Insert screw 21U 21U 21U hang L1 Boring bar steel Boring bar carbide mm round elliptical mm mm 12/12 eShop – – 11 70 279810 1 12/20 eShop – – 11 78 279810 1 12/34 – eShop eShop 11 100 279810 1 12/45 – eShop eShop 11 110 279810 1 12/64 – – eShop 11 130 279810 1 16/12 eShop – – 15 92 279810 1 16/20 eShop – – 15 100 279810 1 16/34 – eShop eShop 15 100 279810 1 16/45 – eShop eShop 15 110 279810 1 16/64 – – eShop 15 130 279810 1 16/75 – – eShop 15 145 279810 1 896