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How to reduce vibration

in metal cutting

Turning - Rotating

Introduction

Vibration in metal cutting is familiar to every machine tool operator. This

phenomena is recognised in operations such as internal turning, threading,

grooving, milling, boring and drilling, to which there are several reasons

why this problem occurs. Some are related to the machine tool itself, to the

clamping of the tool, the length and diameter of the tool holder and the

cutting data to be used. More of this will be discussed later.

There will be several different actions to consider when solving this pro-

blem. Reducing the process parameters is one such consideration, however,

this could have a negative effect on productivity. Our focus, therefore, will

be easy hands on recommendations for productive solutions and easy to

use products. This strategy will be emphasized throughout this guide

which will also contain useful information relating to the tool holder e.g.

clamping methods, extensions and the types of inserts that can be used.

Stretching beyond the normal limit of 4 x the L/D (Length by Dia-

meter) ratio is possible when using a Silent Tools tool holder.

Silent Tools is a Trade Mark for a family of tool holders for turning,

milling, boring and drilling with a damper inside to minimise the problems

with vibration. You will ﬁnd more information about these damped adap-

tors in a separate chapter. Products with a similar function can be referred

to as tuned, damped or anti-vibration tools.

The aim, with this application on hand, is for you to have easy access to

information giving you productive solutions for eliminating vibrations in

your metal cutting process.

For further information and assistance, please contact your local

Sandvik Coromant representative.

Sandvik Coromant – How to reduce vibration in metal cutting

Contents

Turning

Practical tips and hints on how to reduce vibrations ................02

Select your tool system .................................................................04

Turning: hands on information ....................................................07

Threading: hands on information ................................................12

Grooving: hands on information .................................................14

Holding the bar ..............................................................................17

Internal machining theory ............................................................19

Boring very deep holes ..................................................................21

Eliminating vibration with damped boring bars ........................24

Silent Tools

Productivity with slender tools ...................................................25

Which products have Silent Tools ................................................26

Sandvik Coromant – How to reduce vibration in metal cutting

Milling

Practical tips and hints on how to reduce vibrations ................28

Select your tool system ..................................................................32

Main applications and milling concepts ......................................32

Operations – tool recommendations ...........................................37

Clamping .......................................................................................40

Hands on info .................................................................................43

Boring

Practical tips and hints how to reduce vibrations .....................48

Select your tool system ..................................................................51

Hands on info .................................................................................53

Silent Tools

Silent tools within milling ............................................................55

Sandvik Coromant – How to reduce vibration in metal cutting

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