Carmex SIL0310K08U Threading Toolholder Internal Left Hand

Product Description

The CARMEX SIL0310K08U is an indexable threading toolholder designed for internal threading operations on lathes and turning centers. Built to the SI toolholder style, it accepts 08U IR/L inserts secured by a screw-clamp holding method. The shank measures 5/8 x 5/8 inches square with an overall length of 5 inches, making it suitable for boring bar setups where reach and rigidity matter. The holder runs without coolant passage, keeping the design straightforward. Licensed machinists and CNC turning specialists install this holder for single-point internal thread cutting across a range of thread forms.

This toolholder is configured for left-hand cutting orientation, intended for internal threading applications on CNC or manual lathes. The 3/16-inch insert inscribed circle, a neck diameter of 0.290 inches, and a center-to-cutting-edge dimension of 0.260 inches suit this holder for threading smaller bores where clearance is a consideration. The head length of 0.830 inches and back-of-bar to cutting edge of 0.354 inches give machinists predictable tool geometry when programming or setting up thread passes.

Key Features

• Internal threading application with left-hand holder orientation
• SI toolholder series with screw-clamp insert holding for secure, repeatable indexing
• Accepts 08U IR/L threading inserts
• 5/8 x 5/8 inch square shank with 5-inch overall length
• No coolant-through design - straightforward setup without internal passages
• Neck diameter of 0.290 inches supports clearance in confined bore conditions

Compatibility

Designed to accept 08U IR/L threading inserts. Verify insert seat geometry and machine turret bore size before installation. No additional specific model compatibility was provided in the product data.

Installation Notes

This toolholder is installed by a qualified machinist or CNC setup technician. Ensure the machine is powered down and the spindle is fully stopped before mounting or removing the toolholder from the turret. Confirm correct insert seating and screw torque per the insert manufacturer's guidelines before running. Verify bore clearance with the neck diameter before committing to a threading cycle.