Sandvik Coromant 5734147 Indexable Boring Bar 3/4 in Shank

Product Description

The SANDVIK COROMANT 5734147 is a solid carbide indexable boring bar from the CoroTurn 107 series, designed for precision internal boring and turning operations on CNC lathes and machining centers. It features a 3/4 inch (19.05 mm) shank diameter and an overall length of 10 inches (254 mm), with a minimum bore diameter of 0.9291 inches (23.6 mm). The toolholder uses screw clamping to secure a single TCMT 221 insert and delivers a neutral rake angle with a 0-degree lead angle. Coolant-through capability supports chip evacuation and thermal management during deep bore applications. This bar is installed by machinists and CNC toolroom technicians working with tight-tolerance bore work.

The 5734147 is suited for residential machine shops, production facilities, and job shops requiring reliable internal boring and turning from a single toolholder. The E-STFC toolholder style and right-hand cut orientation make it a standard fit for conventional lathe setups. With a center-to-cutting-edge dimension of 0.5 inches (12.70 mm) and a neck diameter of 0.75 inches, this bar maintains rigidity in moderate-depth bore applications. Its multi-use designation allows both boring and turning operations without changing the toolholder.

Key Features

• Solid carbide construction for rigidity and vibration resistance in small-bore applications
• Coolant-through design aids chip evacuation and heat management
• Screw clamping insert retention provides repeatable, secure indexing
• Compatible with TCMT 221 inserts with a 1/4 inch (6.35 mm) inscribed circle
• Neutral rake and 0-degree lead angle for balanced cutting forces
• Multi-use toolholder supports both boring and turning operations

Compatibility

Designed for use with TCMT 221 series inserts. Part of the SANDVIK COROMANT CoroTurn 107 series. Toolholder style is E-STFC with a manufacturers catalog number of E12S-STFCR 2-B1.

Installation Notes

Installation is performed by qualified machinists or CNC toolroom technicians. Ensure the machine spindle is fully stopped and locked out before mounting or changing the toolholder. Verify insert seating and screw torque per the insert manufacturer guidelines before initiating a cut. Confirm bore clearance and overhang ratio are within acceptable limits for the specific material and depth of cut to minimize chatter risk.