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The KENNAMETAL 1097580 is an indexable threading toolholder designed for both internal and external threading operations on CNC lathes and manual turning centers. Part of the Top Notch series, it accepts a NU 3125L insert secured by a clamp-style holding method, providing consistent insert positioning and repeatable thread form accuracy. The right-hand configuration suits standard spindle rotation setups. The shank measures 1 inch wide by 1 inch tall, with an overall length of 5 inches. Weighing 1.28 pounds, it is built for production turning environments where threading reliability is a priority for machinists and toolroom technicians.
This toolholder is suited for threading applications in both internal and external profiles on ferrous and non-ferrous workpieces. The Top Notch series is a widely recognized platform in production turning shops. With a head length of 1.25 inches and a back-of-bar to cutting edge distance of 1.25 inches, it provides good clearance geometry for threading passes. Coolant-through capability is not included on this model. It is appropriate for job shops, production machining facilities, and toolroom setups requiring a reliable right-hand threading holder in the 1-inch shank class.
Designed for use with NU 3125L Top Notch series inserts. No additional compatible model numbers or system families were specified in the product data.
Installation is performed by qualified machinists or toolroom technicians. Power down and lock out the machine spindle before seating or indexing any insert or changing toolholder position. Ensure the shank is fully seated and clamping screws are torqued according to the turret or toolpost manufacturer specifications. Verify thread direction and tool offset values in the CNC control before initiating any threading cycle.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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