Value Collection 220-1594 Boring Head Taper Shank NMTB40

Product Description

The VALUE COLLECTION 220-1594 is a boring head taper shank designed to interface a boring head with a machine spindle using an NMTB40 taper and a 1-1/2-18 threaded mount. The shank transfers cutting forces from the boring head to the spindle while maintaining concentricity throughout the operation. It is used in vertical and horizontal milling machines equipped with NMTB40 spindle tapers. Machinists and tool-and-die technicians install this component when setting up line boring or precision hole enlargement operations. Coolant-through capability is not supported on this shank. The part ships as a single unit and weighs 0.2 pounds.

This taper shank is suited for shop environments running NMTB40-standard milling equipment where a threaded boring head mount is required. The 1-1/2-18 thread specification matches the mounting thread found on compatible boring heads in that size class. Typical applications include precision bore finishing, ID turning setups on a mill, and hole diameter correction work in both production and toolroom settings. No adapter or intermediate arbor is required when the boring head thread matches 1-1/2-18.

Key Features

• NMTB40 taper shank for direct spindle mounting on compatible milling machines
• 1-1/2-18 threaded mount interfaces directly with matching boring heads
• No coolant-through passages, simplifying setup in dry or flood-coolant-from-outside configurations
• Lightweight at 0.2 pounds, minimizing added mass at the spindle
• Single-piece construction with no additional hardware required

Compatibility

Designed as an OEM-style replacement or setup component for milling machines with an NMTB40 spindle taper, used with boring heads threaded to the 1-1/2-18 standard.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Power down and lock out the machine spindle before inserting or removing any taper tooling. Clean both the spindle taper bore and the shank taper with a lint-free cloth before seating to ensure full contact and accurate runout. Draw-in retention hardware appropriate to the NMTB40 standard should be torqued according to machine manufacturer specifications, not values from this listing.