Aloris DA-7R Universal Parting Blade Holder Reversible

Product Description

The ALORIS DA-7R is a reversible universal parting blade holder designed for use with Series DA quick-change tool post systems on engine lathes. The holder accepts parting blades up to 1.125 inches in height and positions the cutting edge at a 1.0-inch centerline height. Reversible mounting allows the blade to be oriented for standard or back-parting operations without swapping toolholders. Built to handle lathe swings from 17 to 48 inches, this holder suits a wide range of engine and toolroom lathes found in production and job-shop environments. Machinists and tool and die makers install this holder as part of a quick-change setup to reduce turnaround between operations.

The DA-7R is suited for use on engine lathes with a swing capacity between 17 and 48 inches when paired with a compatible Series DA quick-change tool post. Typical applications include production parting, grooving, and cutoff operations in both ferrous and non-ferrous materials. The reversible design expands the holder's utility in tight setups where standard blade orientation is not practical, making it a common choice in job shops and maintenance machine rooms running mid-to-large bench and floor lathes.

Key Features

• Reversible blade orientation supports both standard and back-parting operations from a single holder
• Accepts parting blades up to 1.125 inches in height
• 1.0-inch centerline height for consistent tool positioning
• Compatible with lathe swings from 17 to 48 inches
• Series DA quick-change interface for fast, repeatable tool changes
• Overall height of 2.75 inches keeps a low, rigid profile at the tool post

Compatibility

Designed for use with Series DA quick-change tool post systems on engine lathes with a swing range of 17 to 48 inches. Through-coolant is not supported on this holder.

Installation Notes

Installation is performed by a machinist or tool and die maker as part of a quick-change tool post setup. Before installing or changing any toolholder, power down the lathe and confirm the spindle is fully stopped. Secure the parting blade in the holder to the manufacturer-specified clamping screw torque using appropriate Allen or hex keys before engaging a cut. Verify centerline height against the lathe's spindle centerline and adjust the tool post riser if needed before taking the first pass.