Sandvik Coromant 5721753 Indexable Boring Bar 3/8 in Shank

Product Description

The SANDVIK COROMANT 5721753 is an indexable boring bar from the CoroTurn 107 series, designed for internal boring and turning operations on CNC lathes and machining centers. Built from steel with a 3/8 inch (9.53 mm) shank diameter and a 6 inch (152.40 mm) overall length, this right-hand toolholder accepts CCMT 21.51 inserts secured by screw clamping. The minimum bore diameter is 0.4803 inches (12.20 mm), making it suitable for tight-bore finish work. A neutral rake angle and 0-degree lead angle support consistent chip control across a range of workpiece materials. Coolant-through capability helps manage heat and chip evacuation during deep or interrupted cuts.

This boring bar is intended for precision internal turning and boring in production and job-shop environments. Its multi-use design supports both boring and turning applications from a single toolholder, reducing setup time when working on through-holes, blind bores, and facing operations. The CoroTurn 107 series is a well-established indexable platform used in light to medium-duty turning applications on lathes and turning centers where consistent insert positioning and quick change capability are priorities.

Key Features

• Right-hand cut orientation; suitable for standard lathe and turning-center setups
• Screw clamping insert retention for positive, repeatable insert seating
• Coolant-through design aids chip evacuation and thermal management in deep bores
• Neutral rake (0-degree) supports a broad range of insert grades and workpiece materials
• Multi-use toolholder supports both boring and turning from one platform
• 3/8 inch neck diameter matches shank diameter for consistent rigidity along the bar

Compatibility

Accepts CCMT 21.51 inserts with a 1/4 inch (6.35 mm) inscribed circle. Toolholder style is A-SCLC. Part of the SANDVIK COROMANT CoroTurn 107 series. Catalog number A06M-SCLCR 2-R.

Installation Notes

Installation is performed by qualified machinists or tooling technicians on CNC or manual turning equipment. Ensure the machine spindle is fully stopped and the turret or toolpost is locked before mounting or removing the toolholder. Confirm insert seating and screw torque per the insert manufacturer guidelines before taking a cut. Verify coolant-through connections are clear and properly pressurized before engaging the coolant supply.