Sandvik A391.20-31 63 080 Varilock 63 Adaptor

Sandvik Coromant Varilock 63 adaptor A391.20-31 63 080 is a Capto-to-Weldon adaptor for Varilock tooling that lets a Weldon‑shank cutter be mounted in a Varilock 63 interface. The part is labeled C8-A391.20-31 080 (Capto size 8 to Weldon) with a Varilock size 63 body and an overall length near 80 mm. On the Capto side the body diameters step 54.3 mm, 63 mm, 63 mm, and 80 mm, with a mounting diameter (DCON) of 31.75 mm; the design suits steel tooling and uses coolant through an axial entrance at up to 20 bar. The adaptor provides a clamping length around 64 mm and a maximum torque rating of about 40 Nm, aligning with Sandvik Coromant Varilock/Weldon module configurations for modular toolholding systems.