Overview
A boring head enlarges and finishes pre-existing holes to exact diameters with tight tolerances. Mounted on milling machines, it holds a single-point cutting tool adjustable radially for precise bore sizes. Essential for engine blocks, gearboxes, and hydraulic components requiring high accuracy.
Types and Features
Manual boring heads feature graduated dials for micrometer-level adjustments, widely used in job shops. Digital versions incorporate electronic displays eliminating reading errors. Fine boring heads achieve one-micron resolution with precision ground spindles for IT6 grade tolerances. Rough boring heads prioritize rigidity for heavy material removal operations.
How to Choose
Determine the bore diameter range and match the taper shank to your machine spindle. Consider tolerance and surface finish when choosing between types. For production, invest in quick-change cartridge systems. Evaluate depth-to-diameter ratios for deep hole applications requiring specialized designs.
Replacement and Installation
Clean the spindle taper and shank before mounting. Insert the boring bar into the cartridge and tighten to torque specifications. Set the initial diameter and perform a test cut on scrap material. Use only manufacturer replacement parts to maintain precision alignment.
Maintenance Tips
Keep the adjustment mechanism clean and lubricated. Inspect boring bar clamping surfaces for wear. Replace worn inserts promptly. Store in protective cases and verify accuracy periodically by boring test holes and comparing measurements against dial settings.
