Page 1662 - Master Catalog 2017, Inch

Hole Finishing
ROTAFLEX High-Performance Boring Systems
™

General Application Hints
• Identify your critical diameter (D).
• Identify the maximum distance cutting edge (L) to critical diameter.
Here are some examples:

D
D

D

L
L
Refer to this table for fi rst investigation of application:

Type of Tooling Stable Unstable Tests Necessary
Twin Cutter Solid Tools <3,5 x D 3,5–6,5 x D >6,5 x D

Twin Cutter Bridge Tools <3,5 x D 3,5–6,5 x D >6,5 x D

Fine-Boring Heads with Boring Bar (FBHBB) <3,5 x D 3,5–5,0 x D >5,0 x D
Fine-Boring Heads (FBH) <3,5 x D 3,5–5,0 x D >5,0 x D

Fine-Boring Bridge Tools <3,5 x D 3,5–5,0 x D >5,0 x D

Function of the tool is Application may require Machining test may
expected without issues reduced feeds and/or speeds be required to identify
within recommended compared to stable conditions. cutting data.
cutting data.

Causes of and remedies for rough and fi ne boring problems
It is generally assumed that the tools have been properly mounted as per the technical recommendations in this catalog.
Problem Cause Possible Remedy

• Adjust L/D ratio
• Select 90° lead angle on rough boring tools
1. Overhang • Select inserts with positive geometry
Vibration tendency 2. Choice of insert • Select inserts with smaller corner radius
3. Cutting data
• Reduce depth of cut
• Increase feed

• Select 90° lead angle
1. Choice of insert • Select ground inserts with small edge preparation
Slight chatter marks on surface 2. Cutting data • Select inserts with smaller corner radius
3. Machining environment • Increase feed
• Increase coolant

• Select a more wear-resistant insert grade
1. Choice of insert • Increase cutting speed
Conical bores 2. Cutting data • Check whether all screws have been tightened
3. Machining environment
to recommended torque

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