Technical Information Taper Face Contact V-Flange Safety In some cases, standard 7/24 steep-taper tooling can be used in a face contact Similar to all interfaces with face contact, special care should be taken regarding 7/24 taper spindle. However, the combination does not offer the same stability or the cleanliness of the mating faces as high contact pressures are present. advantages of face contact. As a caution, some spindles have a safety switch that Adequate filtration systems for coolant must be used. shuts the spindle down if face contact is not achieved. In these cases, tools will need taper face contact for the spindle to operate. Locking Principle toolholder being loaded just before clamping totally clamped taper contact and face locked taper and face contact clearance 0,020mm (.0008") WWW.WIDIA.COM K49 Technical Information