Scientific Cutting Tools QHC62-1/4 Boring Bar Holder

Product Description

The SCIENTIFIC CUTTING TOOLS QHC62-1/4 is a boring grooving bar holder designed for precision machining operations on CNC lathes and turning centers. Built to accept a 0.25-inch inner diameter boring bar, the holder features a 0.625-inch outer diameter body and an overall length of 3.25 inches. The 0.75-inch head diameter and through-coolant design support efficient chip evacuation and thermal control during deep-bore and grooving passes. Four lock-down screws secure the boring bar firmly, minimizing deflection and maintaining positional accuracy under cutting loads. This holder is installed by machinists and tooling setup technicians in production and job-shop environments.

The QHC62-1/4 belongs to the Series QHC line of boring and grooving bar holders. It is suited for internal grooving and boring applications where precise bar retention and coolant delivery are required. The through-coolant channel directs fluid directly to the cutting zone, making it particularly effective in interrupted cuts or when machining tough materials at higher surface speeds. Typical installations include gang-tool setups and turret-mounted configurations on CNC turning equipment.

Key Features

• 0.25-inch ID accepts standard quarter-inch shank boring and grooving bars
• 0.625-inch OD body fits common turret and gang-tool block bores
• 3.25-inch overall length provides reach for moderate-depth bore applications
• 0.75-inch head diameter supports rigid clamping at the cutting end
• Through-coolant design delivers fluid directly to the cutting zone
• Four lock-down screws provide secure, repeatable bar retention

Compatibility

Designed as an OEM-style holder for use with 0.25-inch shank boring and grooving bars in the Series QHC tooling system. Confirm turret bore and block specifications before installation.

Installation Notes

Installation is performed by qualified machinists or tooling technicians. Power down and lock out the machine spindle and turret before mounting or removing the holder. Ensure all four lock-down screws are torqued evenly to secure the boring bar without inducing runout. Verify through-coolant port alignment with the machine tool coolant supply before starting a cycle.