Page 1670 - Master Catalog 2017, Inch

Hole Finishing Application Example
Heat Exchanger • Tube Sheets

TRM — TOP REAM MODULAR

CHALLENGE
• Tube holes Ø .994" (25,25mm).
• Tolerance range 100 μm.
• Alloy steel, long-chipping.
• Machining center with internal coolant.

SOLUTION
• Six cutting edges.
• Coated cermet.
• Standard 5 x D body clamped
into hydraulic chuck.

CUTTING

• vc = 295 SFM (90 m/min). DATA
• f = .019 IPR (0,48 mm/rev).

RESULT
• After more than 30 minutes only minor
wear visible.

BENEFIT

• Reduction of machining time in total to less
than 60 minutes per plate with 180 holes.
• Predictable tool life as only 2 μm diameter
deviation after 30 minutes tool life.

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