Turning Inserts
There are many variables that go into choosing the correct insert for your turning operations: insert shape, geometry, grade, and more. The goal is to select an insert that meets your requirements for quality and performance, while providing good chip control, and a reasonable combination of wear resistance and toughness.
Choose the insert style (shape and size) based on the features of the part and the desired depth of cut. A larger nose radius is stronger, but requires more machine power, and increases the tendency for vibration. A smaller nose radius increases the access to fine part features, but has a weaker cutting edge.
Choose the chip breaker (geometry) based on the selected machining operation: finishing, medium, or roughing. Roughing with high depths of cut and feedrates requires an insert with a stronger cutting edge.
Finishing operations with light depths of cut and lower feedrates produce lower cutting forces, so cutting-edge strength is not as important. Medium turning operations, with a wide range of depths of cut and feedrate, require a more versatile geometry.
Choose the insert grade (coatings) based on the type of material being cut, the specific machining operation (finishing, medium, roughing), and the cutting conditions (smooth, lightly interrupted, heavily interrupted). The insert grade and the chip breaker complement each other to provide specific performance characteristics. A tougher grade can compensate for a cutting edge with less strength, while a more wear resistant grade can provide longer tool life on a stronger cutting edge.
Chipbreakers
HAL
For cost-effective machining of aluminum, non-ferrous metals, and plastics. Extremely sharp cutting edges result in optimum part finishes with low cutting forces and short chips.
HFS
For finish turning operations. Ground periphery with positive cutting edge ideally suited for high-temp alloys. Micro-finished edge on the ground periphery adds just a slight hone for improved edge integrity and reliability.
HMP
For medium to rough turning operations, with reduced cutting forces and improved chip control for high feed rates. Suitable for high metal removal rates and spindling applications.
HMU
For medium turning operations. Medium universal geometry with a soft cutting action due to its positive profile. Versatile application range well suited for boring operations and turning unstable components.
HUM
For medium turning operations, with a soft-cutting chipbreaker. Used in applications producing varying chip sections, such as profile or copy turning. Good dimensional accuracy. For soft steel materials and stainless steels.
AL
For finish to medium turning operations. High rake angle and a low resistance cutting edge for extended tool life in continuous cutting of aluminum, non-ferrous metals, and plastics.
HFF
For finish turning operations, producing smooth, accurate surfaces. Very good chip control, especially at low depths of cut.
HMA
For finish to rough turning operations. Flat-top geometry for machining cast iron.
HMR
For light to medium rough-turning operations. Excellent choice for steels, difficult-to-machine high-alloy titanium, and aluminum materials. High strength to deal with heavy chip deformation.
HRH
For medium to rough turning operations. Outstanding chip control. High edge strength for interrupted cuts, forging skin, or scale. Preferred for all cast iron, such as gray, malleable, and nodular.
HUR
For rough turning operations. Improved chip forming and coolant flow for increased tool life. Positive geometry reduces cutting forces and improves depth-of-cut notching resistance. Suitable for stainless steel and smooth machining of steel.
HSF
For finish hard turning operations. Excellent chip control with a unique anti-vibration tip structure. Good dimensional accuracy. Excels at cutting high-hardness materials between 40-62 HRC.
HFP
For finish to medium turning operations, with optimal chip control over a wide range of cutting conditions and workpiece materials.
HML
For finish to medium turning operations, with a negative, stable cutting edge.
HMS
For medium turning operations. Primarily used with high-temp materials. Utilizes a micro-finished edge preparation to increase edge toughness.
HUF
For finish turning operations, with a positive cutting edge for reduced cutting forces and superior surface quality.
HM
For medium turning operations. Excellent chip control in various conditions for increased productivity. Variable land reduces cutting loads at high speeds and feeds, promoting stable tool life.
Cermet Chipbreakers
HVB
For finish turning operations. Excellent chip evacuation and control with various depth of cut, especially in copying and internal machining. Superior tool life due to improved edge design and low cutting resistance.
HVL
For finish turning operations. Improved chip control on tough materials and decreased cutting load in external, facing, and copying applications. Predictable and stable cutting edge for excellent surface finish.
Insert Grades
Choose the grade that best matches your application and workpiece material.
Decoding Haas Grades: HTP15
BRAND | H | Haas
APPLICATION | T | Turning
PRIMARY WORKPIECE MATERIAL
P
P – Steel
M – Stainless Steel
K – Cast Iron
N – Non-Ferrous
S – High-Temp Alloys
H – Hardened Materials
U – Universal Machining
APPLICATION RANGE
15
10 – Uninterrupted
15 – Light Interrupted
20 – Medium Interrupted
25 – Medium Interrupted
35 – Heavy Interrupted
SMOOTH SURFACE
Smooth Cut Pre-Turned
MEDIUM TO ROUGH SURFACE
Lightly Interrupted
ROUGH SURFACE
Heavily Interrupted
CCET Insert Grades
Clamping Styles
M – Multi-Lock System*
• For negative-style inserts
• Lock pin and top clamp provide rigid clamping
• Can use a wide variety of insert styles
P – Lever-Lock System
• For negative-style inserts
• Lock pin and top clamp provide rigid clamping
• Can use a wide variety of insert styles
S – Screw-On System
• For positive-style inserts
• Top clamping by screw for screw-on inserts
• Compact design for reliability
• Does not interfere with chip flow
D – Double-Clamp System
• For negative-style inserts
• Powerful single-lever screw clamping
• Spring design releases clamp automatically
• Optimized for chip flow
M – Multi-Lock System*
• For negative-style inserts
• Eccentric lock pin secures the insert against the side
• Top clamp provides rigid downward clamping
• Can use a wide variety of insert styles
S – Screw-On System
• For positive-style inserts
• Top clamping by screw for screw-on inserts
• Compact design for reliability
• Does not interfere with chip flow
Turning Inserts Overview