Iscar 3800109 Threading Toolholder Internal Right Hand

Product Description

The ISCAR 3800109 is an internal, right-hand indexable threading toolholder designed for precision thread-cutting operations on lathes and turning centers. Built to the SI toolholder style, it accepts a wide range of IR and IR/L series threading inserts secured by a screw-clamp holding method. The shank measures 0.38 x 0.38 inches with an overall length of 4.0 inches and a shank length of 3.62 inches. The minimum bore diameter is 0.47 inches, making it suitable for threading smaller internal bores. No coolant-through provision is included. This toolholder is installed by machinists and CNC lathe operators performing internal threading on a variety of thread forms.

The 3800109 is used in internal threading applications on CNC turning centers and manual lathes across job shops, production machining facilities, and maintenance repair operations. Its 0.47-inch minimum bore diameter suits smaller internal thread profiles. Compatible insert geometries cover a broad range of thread standards including UN, ISO, NPT, NPTF, BSPT, API, ACME, and others listed below, giving the operator flexibility across common and specialty thread forms without changing the toolholder body.

Key Features

• Internal, right-hand orientation for standard lathe tool post mounting
• SI toolholder style with screw-clamp insert retention for rigid, repeatable positioning
• 0.38 x 0.38 inch square shank fits standard boring bar holders and tool blocks
• Minimum bore diameter of 0.47 inches enables threading of smaller internal features
• Broad insert compatibility: GTGA, GTMA, IR to BUT, IR to EL, IR to MJ, IR/L to 55, IR/L to 60, IR/L to ABUT, IR/L to ACME, IR/L to API, IR/L to API RD, IR/L to BSPT, IR/L to ISO, IR/L to NPT, IR/L to NPTF, IR/L to PG, IR/L to RND, IR/L to SAGE, IR/L to STACME, IR/L to TR, IR/L to UN
• Part of the IscarThread series for consistent system-level tooling integration

Compatibility

Designed for use with GTGA, GTMA, and the full IR/IR/L insert series as listed in the insert compatibility data above, covering UN, ISO, NPT, NPTF, BSPT, API, API RD, ACME, STACME, TR, PG, RND, SAGE, MJ, 55-degree, 60-degree, and ABUT thread forms. No specific machine model compatibility is stated by the manufacturer for this toolholder.

Installation Notes

Installation is performed by a qualified machinist or CNC setup technician. Power down or disable the machine spindle and engage the E-stop before inserting or removing the toolholder from the turret or tool block. Secure the shank in the appropriate boring bar holder or tool block to the machine tool manufacturer torque specifications. Verify insert seating and screw clamp engagement before resuming cutting operations.