Iscar 3800084 Indexable Threading Toolholder Internal Rh

Product Description

The ISCAR 3800084 is an indexable threading toolholder designed for internal threading operations on lathes and turning centers. It features a right-hand orientation and a square shank measuring 1.5 inches wide by 1.5 inches tall, with a shank length of 10.5 inches and an overall length of 12 inches. The toolholder accepts T 22 inserts secured by a screw-clamp holding method, providing rigid and repeatable insert positioning during threading passes. It is rated for a minimum bore diameter of 1.75 inches and carries a center-to-cutting-edge measurement of 0.98 inches. No coolant-through capability is present on this model. Licensed machinists and CNC turning specialists are the primary installers of this toolholder.

This toolholder is suited for internal threading on medium-to-large bore workpieces in both production and job-shop environments. The SIR series designation identifies it as a bar-style internal holder commonly mounted in square-shank pockets on tool turrets or gang-style tool posts. Applications include threading of hydraulic ports, pipe fittings, and other bored components requiring a minimum bore clearance of 1.75 inches. The screw-lock insert retention is appropriate for interrupted-cut conditions and materials that generate high cutting forces.

Key Features

• Internal threading application with right-hand cut direction
• Square shank: 1.5 inches wide x 1.5 inches tall x 10.5 inches shank length
• Overall length of 12 inches for extended reach into deep bores
• Accepts T 22 inserts held by screw-clamp method for rigid, repeatable seating
• Minimum bore diameter of 1.75 inches suits medium-to-large bore threading
• Operates without coolant-through passages — standard external coolant only

Compatibility

Designed for use with T 22 inscribed-circle inserts in the ISCAR SIR series. The 1/2-inch insert inscribed circle is the controlling insert geometry for this holder. No additional compatible model or part numbers were specified in the product data.

Installation Notes

Installation should be performed by a qualified machinist or CNC turning technician. Secure the shank fully within the turret pocket or tool post, ensuring the shank seat surfaces are clean and free of chips before tightening. Power down and lock out the machine spindle before mounting or changing the toolholder or insert. Verify minimum bore clearance against the 1.75-inch minimum bore diameter specification before beginning a threading operation.