BS ISO 5686-3:2024 PDF

1 Scope This document specifies the dimensions of polygonal taper receivers with flat contact surface (PTI). These receivers are the machine-side part of the interface to the (in cutting process non-rotating) tool carrier of machine tools (e.g. turret lathes, turning centres). This document specifies four types of machine-side interface types, which differ at the face contact. The bores for receiving the tool shanks themselves are designed identically for all types.

Receiver type F has one hole for the coolant supply (F = fluid); PTI-F type tool holder can be installed in 0°- and 180°-position. Receiver type H has a primary coolant hole for the main supply and a secondary coolant hole for an intermediate tool position on the face contact (H = half). For PTI type H holders an installation position offset by 180° is not possible. Receiver type A has one hole on the face contact for the primary coolant supply and one additional hole for supplying the tool holder (driven tool) with sealing air (A = air). Two more bores allow the installation of PTI-A holders with spring-type straight pin in 0°- and 180°-position. Receiver type X has a primary coolant hole for the main supp...