Technical Information
Internal Laydown Threading
Required Information
chuck
jaws
70mm
From Part Drawing:
material:
thread form:
tolerance:
operation:
pitch diameter:
35mm
ISO R262
2,5mm pitch
50mm deep
4140 steel
ISO R262 2,5mm pitch
ISO Metric Class 6G/6H
internal threading
40mm x 35mm deep
feed
40mm
From Machine Setup Data:
tooling: 20mm boring bar
spindle rotation: clockwise
feed: away from chuck
CW rotation
Steps for a Successful Threading Operation
Step 1 •
Determine Threading Method
Step 2 •
Select Insert
Need to Know: Need to Know:
• Operation (internal). • Thread form (ISO Metric Class 6G/6H).
• Spindle rotation (CW).
Clockwise rotation. • Hand of insert (left hand — NL).
• Feed direction (away from chuck).
• Left-hand toolholder.
Choose the High-Performance Solution
• Left-hand insert (NL).
• Reverse helix method.
catalogue number insert size TN6025
3IL25ISO 3 •
High-Performance Selection
NOTE: Use insert with largest possible insert size to go into the bore.
insert: 3IL25ISO
grade: TN6025
speed: 130 m/min
Step 3 •
Select the Grade and Speed Step 4 •
Select Toolholder Step 5 •
Select Shim
Need to Know: Need to Know: Need to Know:
• Workpiece material (4010 steel). • External or internal operation
(internal). • Thread form — TPI or pitch
(2,5mm pitch).
• Pitch diameter to determine minimum
bore diameter for internal operations
(40mm). • Pitch diameter (40mm).
Options: Grade and Speed
Selection Guidelines
• Helix method (reverse).
See Laydown Threading (LT)
shim selection chart.
• Type of tooling — toolholder, boring
bar (boring bar).
• Hand of tool (left hand).
threading
operation
steel
Select SM-YE3
• Insert size (16).
NOTE: For this application, the
standard shim supplied
should be replaced with
the recommended shim,
SM-YE3.
general purpose
and high performance
internal
TN6025
Options:
40–200 m/min
widia.com
catalogue number insert size shim
AVR32D3R 3 SM-YE3
F99
• Operation (internal).