Scientific Cutting Tools QHC10-5/16 Boring Grooving Bar Holder

Product Description

The SCIENTIFIC CUTTING TOOLS QHC10-5/16 is a boring and grooving bar holder designed for precision machining applications. This Series QHC holder features a 5/16-inch ID and 1-inch OD, with an overall length of 3-1/4 inches and a head diameter of 1.12 inches. It accepts a 1/2-14 NPT through-coolant connection, allowing direct coolant delivery to the cutting zone for improved chip evacuation and tool life. Machinist and toolroom technicians install this holder in CNC lathes and boring applications where secure bar retention and consistent coolant flow are required.

This holder is suited for internal boring and grooving operations on CNC turning centers and manual lathes. The through-coolant design makes it appropriate for deep-bore applications where flood coolant does not reach the cutting edge effectively. Four lock-down screws provide firm, repeatable clamping of the boring bar, reducing chatter and maintaining dimensional accuracy during continuous production runs.

Key Features

• 5/16-inch ID and 1-inch OD for compatible boring bar fitment
• 3-1/4-inch overall length with 1.12-inch head diameter
• 1/2-14 NPT through-coolant port for direct coolant delivery to the cutting zone
• Four lock-down screws for secure, vibration-resistant bar clamping
• Series QHC design for standardized tooling system compatibility

Compatibility

Designed as an OEM-style replacement and standard fitment holder within the Series QHC boring and grooving bar holder system for compatible boring bar diameters of 5/16 inch.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Ensure the machine spindle is fully stopped and all energy sources are locked out before mounting or adjusting the holder. Tighten all four lock-down screws evenly to the machine tool manufacturer specifications to prevent bar slippage. Verify the 1/2-14 NPT coolant connection is properly sealed before resuming through-coolant operation.