Dorian Tool 73310155540 Indexable Boring Bar Right Hand

Product Description

The DORIAN TOOL 73310155540 is a right-hand MINI S-SDUC indexable boring bar designed for internal turning and boring operations on CNC lathes and manual turning centers. Built from steel with a 3/8-inch shank diameter and 4-inch overall length, it accepts screw-clamped diamond-shaped inserts with a 1/4-inch inscribed circle. The minimum bore diameter is 0.492 inches with a maximum bore depth of 0.875 inches. A 3-degree lead angle and neutral rake angle provide stable cutting geometry at the insert. This tool is installed and operated by machinists and CNC turning technicians in production and job-shop environments.

This boring bar is suited for small-diameter internal boring applications in light to medium material removal operations. The MINI S-SDUC toolholder style accommodates compact bores where standard holders will not fit. Compatible insert size code is 21.51, and the insert inscribed circle measures 0.25 inches. The right-hand cutting direction makes it appropriate for conventional lathe setups. It is a single-use toolholder without coolant-through capability, intended for dry or flood-coolant applications where through-spindle coolant is not required.

Key Features

• Right-hand cutting direction for standard lathe setups
• Minimum bore diameter of 0.492 inches enables small-diameter internal operations
• Screw-clamped diamond insert retention for secure, repeatable indexing
• 3-degree lead angle with neutral rake for stable cutting geometry
• Steel construction provides rigidity in the MINI S-SDUC form factor
• Compatible with MINI S-SDUC inserts, insert size code 21.51, 1/4-inch inscribed circle

Compatibility

Designed as an OEM-style replacement and standard fitment for MINI S-SDUC indexable boring bar toolholders accepting diamond-shaped inserts with a 1/4-inch inscribed circle and insert size code 21.51.

Installation Notes

This boring bar is installed and set up by qualified machinists or CNC turning technicians. Ensure the lathe or turning center is fully powered down and the spindle is locked before mounting or changing the toolholder. Secure the shank in a tool block or turret station per machine manufacturer specifications. Index or replace inserts using the appropriate screw-type fastener; do not overtighten, as this can damage the insert pocket.