Carmex 125-3EXRHTHL Threading Toolholder External Rh Ser

Product Description

The CARMEX 125-3EXRHTHL is an indexable threading toolholder designed for external threading operations on metalworking lathes and turning centers. Built in the SER series with a right-hand cutting orientation, it accepts 16ER indexable threading inserts secured by a screw-clamp holding method. The shank measures 1.25 x 1.25 inches square with an overall length of 7 inches, providing a rigid, low-overhang platform suited for precision thread-form cutting. This toolholder is configured without coolant-through capability and is intended for standard dry or flood-coolant setups. Machinists and toolroom technicians select this holder for its consistent insert indexing and compatibility with the widely available 16ER insert family.

This toolholder fits external threading applications in general machining, job-shop, and production turning environments. The 1.25-inch square shank size targets medium-duty lathes and CNC turning centers with appropriately sized tool blocks or quick-change turrets. The SE toolholder style is a standard configuration used in a broad range of thread-form cutting scenarios, including v-threads and partial-profile applications, wherever external thread cutting is performed on cylindrical workpieces. It is sold individually and requires no minimum order above a single unit.

Key Features

• External threading application with right-hand cutting orientation
• Accepts 16ER indexable threading inserts with a 3/8-inch inscribed circle
• Screw-clamp insert holding method for secure, repeatable indexing
• 1.25 x 1.25 inch square shank with 7-inch overall length for rigid setup
• SER series SE toolholder style - a widely recognized standard configuration
• No coolant-through design; compatible with external flood or dry machining setups

Compatibility

Designed for use with 16ER series indexable threading inserts. The SE toolholder style and 1.25-inch square shank are compatible with standard tool blocks and quick-change turret systems sized for 1.25-inch shank holders on metalworking lathes and CNC turning centers.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician familiar with indexable tooling systems. Ensure the machine spindle is fully stopped and the lathe or turning center is powered down before mounting or indexing inserts. Seat the shank fully in the tool block and tighten the clamping bolts evenly to manufacturer-specified values for the tool block in use. When indexing or replacing a worn 16ER insert, verify the new insert is fully seated in the pocket before resuming cutting.