Virtually unbreakable

Duo-Lock is a new revolutionary coupling for solid carbide end milling applications.

This replaceable head design combines a high accuracy in runout and length repeatability with maximum stability, making it a precise and virtually unbreakable interface.


Try any of these 4 fluted modular end mill tips

in combination with a conical shank

For steel, stainless steel, and cast iron.

HARVI 4 Flute UKDV Series in KCPM15*


Duo-Lock Conical Shank

For stainless steels, and high temperature alloys.

HARVI 4 Flute ULDV Series in KCSM15*


Duo-Lock Conical Shank

*Choose from diameters 10, 12, 16, 20, 25 and 32 mm (3/8, 1/2, 5/8, 3/4, 1 and 1 1/4 inch)
NOTE: Duo-Lock conical shanks can be clamped with any adaptor style!

High Performance HARVI Geometry

High metal removal rates with up to 1 x D full slotting and up to 1,5 x D side milling at 50% ae capability.


Benefit from 50μm / 0.002" axial repeatability from tip-to-tip, independent from batch of tips.

Intelligent Thread

Ensures that stress levels remain below critical values.

3rd Contact Surface

Delivers high stiffness and accuracy below 5μm / 0.0002" runout.

Double Cone

Eliminates expensive presetting processes by providing an axial repeatability of 10μm / 0.0004".

37/39° Variable Helix Technology

Minimizes chatter and harmonics for smoother machining

Asymmetrical Flute Spacing

Reduces vibrations, improving surface finish.

Flute Spacing & Helix

Asymmetrical flute spacing and variable helix configuration minimizes chatter and harmonics for smoother machining.

Cutting action

Center cutting.

Set up Reduction

Single tool for both roughing and finishing operations requiring fewer setups.


Conical shape for best results in full slot milling and side milling.


Pull out protection with Safe-Lock™.


Strongest combination with Safe-Lock™ adaptors or sleeves.


• Other adaptor styles can be utilized as well.
• Recommended adaptors: HydroForce, ShrinkFit and Milling Chucks.

1. Clean both sides

Clean both sides of the coupling before clamping

2. High quality torque wrench

Use a high quality torque wrench!


For highest runout accuracy. No one-sided clamping.

Power Transmission

Optimal power transmission by constant force application.

Highest Clamping Forces

Maximum torque for highest clamping forces.


Extension handles recommended for DL25 and DL32.

Kennametal reserves the right to have a Kennametal Sales Engineer assess the application to make recommendations for process improvement in order to achieve the targeted performance. A request for credit must be submitted to Kennametal within 60 days of shipment of your order and a Returned Materials Authorization will be issued for the product.

All orders are subject to Kennametal’s standard terms and conditions of sale. Unused and/or worn tools for which credit has been issued must be returned to Kennametal at the discretion of Kennametal (free-of-charge shipment).

Credit for individual tools will be issued on only one order per customer per year. Credit will be issued as a credit to the customer’s account. Kennametal’s liability under this promotion is limited to refunds issued on tooling and does not include damage to workpieces, machinery, or any other consequential damages.

This offer is valid through June 30, 2017. Offer void where prohibited by law. All local, state, and federal laws apply. Offer subject to product availability. Other restrictions may apply. Kennametal Inc. reserves the right to alter or cancel this promotion at any time and without further notice.

Call today and refer to promo code DL-NORISK
+1 800.446.7738



Discover the Duo-Lock Product Portfolio.