Scientific Cutting Tools QHC10-3/8 Boring Grooving Bar Holder

Product Description

The SCIENTIFIC CUTTING TOOLS QHC10-3/8 is a boring and grooving bar holder designed for use with CNC lathes and turning centers. It accepts a 3/8-inch inner diameter boring bar and mounts into a 1-inch outer diameter toolpost or turret station. The holder features a 1/2-14 NPT through-coolant port, allowing directed coolant delivery to the cutting zone. With a 3-1/4-inch overall length and a 1.12-inch head diameter, this holder provides rigid, low-profile support for grooving and boring operations. Four lock-down screws secure the bar firmly to minimize deflection during cutting.

This bar holder is suited for production and job-shop turning applications where consistent tool positioning and coolant delivery are required. It is designed for use in gang-tool setups or standard turret configurations on CNC lathes. The through-coolant design makes it well matched to operations involving deep bores or hard-to-machine materials where heat management at the cutting edge is critical. Machinists and CNC setup technicians are the primary users in both job shop and production environments.

Key Features

• 3/8-inch ID accepts standard boring and grooving bars of that shank diameter
• 1-inch OD for mounting into compatible turret or toolpost stations
• 1/2-14 NPT through-coolant port for directed coolant at the cutting zone
• 3-1/4-inch overall length with 1.12-inch head diameter for compact turret clearance
• Four lock-down screws provide secure, repeatable bar clamping
• Part of the Series QHC holder family for consistent cross-compatibility within the line

Compatibility

Designed for use with 3/8-inch shank boring and grooving bars in CNC lathe turrets or toolpost stations requiring a 1-inch OD holder with 1/2-14 NPT through-coolant connection. Belongs to the Series QHC product family.

Installation Notes

Installation is performed by qualified CNC machinists or tool-room technicians. Disengage machine power and verify the spindle is fully stopped before mounting or adjusting tooling in the turret. Torque all four lock-down screws evenly to seat the boring bar without inducing runout. Connect the coolant supply line to the 1/2-14 NPT port using an appropriate fitting and verify for leaks before resuming cutting operations.