Telescopic Quick-Change Tap Holder Sets

• G0312-BT40: M3–M12, D = 50 mm and L = 150 mm. Request G0312-BT40.
• G0620-BT40: M6–M20, D = 68 mm and L = 195 mm. Request G0620-BT40.

For a request including M16 or M20, G0312’s listed range is not sufficient. The larger range still requires confirmation of the tap shanks, holder connection and machine tapping method.

Both G0312 and G0620 include M6–M12 in their listed ranges. For tap sizes within that overlap, compare the set dimensions in the table and confirm the machine connection and tap shanks; the range alone does not choose the set or specify its contents.

List the tap sizes actually needed and ask for the proposed contents by item. A range such as M6–M20 does not mean that every chuck, tap or accessory in that range is included.

Separate the holder, individual chucks, any required accessories and packaging in the quotation request. Keep XT40 as the catalog’s separate designation unless a drawing confirms the connection; do not silently substitute BT40. Compensation travel is not specified in the supplied table and must be confirmed if it matters to your setup.

For a BT40 or BT50 GT holder body, see GT telescopic tapping holders. For replacement components in an existing GT assembly, compare individual GT3 and GT12 tapping chucks. Use the tap-holder inquiry guide to document the machine connection and tap shank before requesting a quotation.