Sumitomo 2000W12 Indexable Boring Bar 1-1/4 in Bore

Product Description

The SUMITOMO 2000W12 is a steel-bodied indexable boring bar engineered for internal turning and boring operations on CNC lathes and machining centers. Built to the BMWLNR164 toolholder style, it accepts WNMG 432 trigon inserts secured by a pin-and-clamp holding method. The bar features a 1 inch shank diameter and a 12 inch overall length, with a minimum bore diameter of 1.25 inches and a center-to-cutting-edge distance of 0.625 inches. A 5-degree lead angle and negative 15-degree rake angle define the cutting geometry. Coolant-through capability is built in via a 0.1969 inch coolant hole, supporting high-pressure coolant delivery at the cutting zone. At 3.412 pounds, the bar is suited for robust, production-level boring setups.

The 2000W12 is designed for right-hand cutting direction and mounts in standard lathe turrets or boring bar holders accepting a 1 inch round shank. It is appropriate for both roughing and finishing passes on internal bores in ferrous and non-ferrous workpiece materials. Machinists and toolroom technicians working in high-volume turning applications will find the coolant-through design and rigid steel construction well matched to interrupted cuts and deep bore reach requirements.

Key Features

• BMWLNR164 toolholder style with pin-and-clamp insert retention for positive insert indexing
• Accepts WNMG 432 trigon inserts with 1/2 inch inscribed circle and 3/16 inch insert thickness
• Coolant-through design with 0.1969 inch coolant hole for direct coolant delivery to the cutting edge
• Negative 15-degree rake angle and 5-degree lead angle optimized for right-hand boring
• Steel construction provides rigidity and vibration damping in deep-reach applications
• 1 inch shank diameter fits standard turret and boring bar holder configurations

Compatibility

Compatible with WNMG 432 trigon inserts. Designed as an OEM-style toolholder for CNC lathes and turning centers accepting a 1 inch round shank boring bar with right-hand cutting orientation.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Secure the shank in the turret or boring bar holder to the tool manufacturer and machine builder specifications before engaging the spindle. Ensure the coolant-through passages are clear and connected to the machine coolant supply before running. Index or replace the WNMG 432 insert only after the machine is fully stopped and the spindle is locked out per your facility lockout-tagout procedure.