1. Grooving Tools
 
Purpose
 
Grooving tools are used for:
 
 
 
Internal grooving
 
 
External grooving
 
 
Face grooving
 
 
Snap ring grooves
 
 
O-ring grooves
 
 
Retaining ring grooves
 
 
Lubrication grooves
 
 
Precision-width groove machining
 
 
Working Principle
 
The tool holder (grooving holder):
 
 
 
Reduces vibration
 
 
Securely clamps the insert
 
 
Withstands cutting forces
 
 
The actual cutting operation is performed by the carbide insert.
 
Grooving Systems
 
The most widely used grooving systems include:
 
MGMN
 
MGMN is the most commonly used grooving insert system.
 
Available insert widths:
 
 
 
1.0 mm
 
 
1.5 mm
 
 
2.0 mm
 
 
2.5 mm
 
 
3.0 mm
 
 
4.0 mm
 
 
5.0 mm
 
 
Typical Korloy insert designations:
 
 
 
MGMN150
 
 
MGMN200
 
 
MGMN250
 
 
MGMN300
 
 
MGMN400
 
 
MRMN
 
Designed for heavier machining applications.
 
Advantages
 
 
 
Stronger cutting edge
 
 
Higher feed rates
 
 
Longer tool life
 
 
GDM / GTN
 
These are older grooving insert systems.
 
Today, they have largely been replaced by the more versatile MGMN system.
 
Grooving Tool Holders
 
External Grooving Holders
 
Common shank sizes:
 
 
 
20 × 20 mm
 
 
25 × 25 mm
 
 
32 × 32 mm
 
 
Internal Grooving Holders
 
Selected according to the minimum bore diameter.
 
Typical minimum bore sizes:
 
 
 
Ø12 mm
 
 
Ø16 mm
 
 
Ø20 mm
 
 
Ø25 mm
 
 
Ø32 mm
 
 
Face Grooving Holders
 
Designed for machining grooves on the face of a workpiece.
 
Korloy Grooving Inserts
 
Korloy grooving inserts feature:
 
 
 
Fine-grain tungsten carbide substrate
 
 
PVD or CVD coating technology
 
 
Advanced chipbreaker geometry
 
 
Excellent wear resistance
 
 
Low cutting forces
 
 
Main Korloy Grades
 
PC5300
 
Applications
 
 
 
Stainless steel
 
 
Low-carbon steel
 
 
General-purpose machining
 
 
Advantages
 
 
 
Low friction
 
 
Excellent surface finish
 
 
Long tool life
 
 
PC8110
 
Applications
 
 
 
Steel
 
 
Cast steel
 
 
General turning operations
 
 
Advantages
 
 
 
Excellent wear resistance
 
 
High heat resistance
 
 
PC9030
 
One of Korloy's most popular grooving grades.
 
Features
 
 
 
High-speed machining capability
 
 
Long tool life
 
 
Strong cutting edge
 
 
Excellent impact resistance
 
 
PC6510
 
Developed specifically for cast iron machining.
 
Chipbreaker Geometries
 
One of the key features of Korloy grooving inserts is their advanced chipbreaker design.
 
Benefits
 
 
 
Produces short, controlled chips
 
 
Protects the machined surface
 
 
Ideal for automated production
 
 
Extends tool life
 
 
Reduces cutting temperature
 
 
Threading Tools
 
Threading tool holders are used for machining:
 
 
 
Metric threads
 
 
Whitworth threads
 
 
UN threads
 
 
UNF threads
 
 
BSP pipe threads
 
 
NPT pipe threads
 
 
Trapezoidal threads
 
 
ACME threads
 
 
External Threading Holders
 
The most common series is SER.
 
Example:
 
SER2020K16
 
Designation:
 
 
 
S = Threading tool holder
 
 
E = External threading
 
 
R = Right-hand
 
 
20 = 20 mm shank height
 
 
20 = 20 mm shank width
 
 
K = Holder length designation
 
 
16 = Accepts 16ER inserts
 
 
Internal Threading Holders
 
The most common series is SIR.
 
Example:
 
SIR0016M16
 
Designed for internal thread machining.
 
Korloy Threading Inserts
 
Korloy manufactures threading inserts in the following sizes:
 
External
 
 
 
11ER
 
 
16ER
 
 
22ER
 
 
27ER
 
 
Internal
 
 
 
11IR
 
 
16IR
 
 
22IR
 
 
Thread Profiles
 
AG60
 
 
 
60° universal profile
 
 
Suitable for both Metric and Unified (UN) threads
 
 
Metric Full Profile
 
 
 
Produces complete metric thread profiles
 
 
Higher thread accuracy
 
 
Improved thread crest formation
 
 
UN
 
Designed for Unified inch thread standards.
 
BSW (Whitworth)
 
 
 
55° thread profile
 
 
Suitable for British Standard Whitworth threads
 
 
NPT
 
Designed for tapered pipe threads.
 
Trapezoidal
 
Used for power transmission screws.
 
ACME
 
Designed for power screw applications requiring high load capacity.
 
Korloy Threading Grades
 
Commonly used grades include:
 
PC9030
 
Recommended for general steel machining.
 
PC5300
 
Optimized for stainless steel machining.
 
PC8110
 
Designed for steel turning applications.
 
PC6510
 
Developed for cast iron machining.
 
Selecting the Correct Tool Holder
 
The following factors should be considered when selecting a grooving or threading holder:
 
 
 
Groove width
 
 
Groove depth
 
 
Workpiece material
 
 
Internal or external machining
 
 
Machine power
 
 
Clamping rigidity
 
 
Coolant application
 
 
Cutting speed
 
 
Feed rate
 
 
Incorrect tool selection may result in:
 
 
 
Vibration
 
 
Burr formation
 
 
Insert breakage
 
 
Dimensional inaccuracies
 
 
Reduced tool life
 
 
Advantages of Korloy Grooving and Threading Inserts
 
 
 
Premium fine-grain tungsten carbide substrate for extended tool life
 
 
Advanced PVD/CVD coatings providing excellent wear and heat resistance
 
 
Optimized chipbreaker geometries for steel, stainless steel, cast iron, and selected superalloys
 
 
ISO-standard dimensions compatible with Teknik tool holders and most standard tool holders worldwide
 
 
Wide selection of grades and geometries suitable for both high-volume production and precision machining
 
 
Recommended Starting Cutting Parameters
 
Workpiece MaterialCutting Speed (Vc)Feed RateC45 Steel140–220 m/min0.05–0.15 mm/revAISI 304 Stainless Steel90–160 m/min0.04–0.12 mm/revCast Iron180–280 m/min0.06–0.18 mm/revAluminum Alloys300–800 m/min0.08–0.25 mm/rev
 
 
 Note: These values are recommended as starting parameters only. Optimum cutting conditions should be adjusted according to the selected 
 Korloy grade (such as 
 PC5300, 
 PC8110, or 
 PC9030), groove width, tool overhang, coolant application, machine rigidity, and workpiece material to achieve maximum productivity and tool life.