Page 18 - Heat_Exchanger_2020

Machining Tube Sheets

Heat Exchangers
Drilling

Fully Effective Large Diameter Drill • Highest steel grade with a body
hardness of up to 55 HRC
• Excellent chip evacuation, improved • Drilling depth to diameter ratios
surface finish and hole cylindricity
of 2xD, 3xD, 4xD and 5xD
• Excellent solution for drilling stacked plates • Twisted coolant holes
• Standard inserts
• High rigidity due to integral tool • Diameter range of 12 to 60 mm (.472 to 2.36”)
• Carries standard SOMX/SOMT indexable inserts with
• No need for pre-hole
4 cutting edges with DT, GF and HD chipbreaker
• Full program from diameter 26 to 50 mm (1.023 • Optimal flute shape for easy chip flow
to 2.165”) in increments of 1 mm (.04”)
• Standard program tools of 5xD drilling depth
• Indexable inserts are available with several chipformer
types in the following grades: IC808 and IC908
• Indexable SUMOCHAM and SUMOCHAM-IQ
heads are available with ICP/ICM/HCP geometries
in ISCAR`s IC908 TiAlN PVD grade

L=5xD and up CHAMIQDRILL drill family for the drilling range of 33
• High feed drilling to 40 mm (1.3-1.574”) with 1.5, 3, 5 and 8 length to
• Excellent surface quality diameter ratios. The CHAMIQDRILL features a unique
design, utilizing the carbide’s flexibility for self-
• High hole accuracy
• Large drilling depth: L=5xD locking; eliminating the need for clamping accessories.
The robust structure of the drill with the concave
and higher– up to 800 mm (31.5”)
• Carries standard SOMX/SOMT indexable cutting edge design enables drilling at high feed rate,
providing very accurate IT8 – IT9 hole tolerance
inserts with 4 cutting edges
• No dedicated machine or extra setup needed
• Standard coolant pressure as used for general drilling
• Standard indexable, double-sided guiding pads

18 ISCAR