SCHUNK ROTA NCA 160 Gebrauchsanweisung

Translation of Original Operating Manual

Power Lathe Chuck

ROTA NCA

Assembly and Operating Manual

Superior Clamping and Gripping

Imprint

02.00|ROTA NCA |en

Imprint

This manual is protected by copyright. The author is SCHUNK GmbH & Co. KG. All rights

reserved.

Technical changes:

We reserve the right to make alterations for the purpose of technical improvement.

Document number: 1155400

Version: 02.00 |26/04/2021|en

Dear Customer,

thank you for trusting our products and our family-owned company, the leading

technology supplier of robots and production machines.

Our team is always available to answer any questions on this product and other solutions.

Ask us questions and challenge us. We will find a solution!

Best regards,

Your SCHUNK team

H.-D. SCHUNK GmbH & Co.

Spanntechnik KG

Lothringer Str. 23

D-88512 Mengen

Tel. +49–7572-7614-0

Fax +49-7572-7614-1099

[email protected]

schunk.com

Customer Management

Tel. +49–7572-7614-1300

Fax +49-7572-7614-1039

customercentermenge[email protected]k.com

Please read the operating manual in full and keep it close to the product.

Table of Contents

02.00|ROTA NCA |en

Table of Contents

General .................................................................................................................... 5

1.1

About this manual .................................................................................................... 5

1.1.1

Presentation of Warning Labels.................................................................... 5

1.1.2

Applicable documents................................................................................... 6

1.1.3

Sizes............................................................................................................... 6

1.2

Warranty................................................................................................................... 6

1.3

Scope of Delivery ...................................................................................................... 7

Basic safety notes .................................................................................................... 8

2.1

Intended use............................................................................................................. 8

2.2

Not intended use ...................................................................................................... 8

2.3

Constructional changes ............................................................................................ 9

2.4

Spare parts................................................................................................................ 9

2.5

Chuck jaws ................................................................................................................ 9

2.6

Environmental and operating conditions............................................................... 10

2.7

Personnel qualification........................................................................................... 11

2.8

Personal protective equipment.............................................................................. 12

2.9

Notes on safe operation......................................................................................... 12

2.10

Transport ................................................................................................................ 13

2.11

Malfunctions........................................................................................................... 13

2.12

Disposal................................................................................................................... 13

2.13

Fundamental dangers............................................................................................. 13

2.13.1

Protection during handling and assembly .................................................. 14

2.13.2

Protection during commissioning and operation ....................................... 14

2.13.3

Protection against dangerous movements................................................. 15

2.13.4

Notes on particular risks ............................................................................. 15

Technical data ......................................................................................................... 19

3.1

Chuck data .............................................................................................................. 19

3.2

Clamping force-RPM diagrams............................................................................... 20

3.3

Calculations for clamping force and speed ............................................................ 22

3.3.1

Calculation of the required clamping force in case of a given rpm............ 22

3.3.2

Calculation example: Required initial clamping force Fsp0 for a given rpm n

..................................................................................................................... 25

3.3.3

Calculation of the permissible rpm nzul in case of a given initial clamping

force Fsp0.................................................................................................... 26

3.4

Grades of Accuracy................................................................................................. 27

3.5

Permissible imbalance............................................................................................ 27

Table of Contents

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Torques per screw ................................................................................................... 27

Assembly................................................................................................................. 28

5.1

Installing and connecting ....................................................................................... 28

5.2

Connection thread draw tube ................................................................................ 29

5.3

Checking the chuck mount ..................................................................................... 30

5.4

Assembly................................................................................................................. 31

5.4.1

Chuck assembly (with cylindrical recess).................................................... 31

5.4.2

Assembly preparation for chuck with reduction or extension flange ........ 34

5.4.3

Assembly preparation for chuck with direct mount................................... 34

Function .................................................................................................................. 35

6.1

Function and handling............................................................................................ 35

6.2

Functional testing ................................................................................................... 35

6.3

Replacement or renewal of jaws............................................................................ 36

Maintenance ........................................................................................................... 38

7.1

Lubrication.............................................................................................................. 38

7.2

Maintenance intervals............................................................................................ 39

7.3

Disassembling and assembling the chuck .............................................................. 39

Spare parts.............................................................................................................. 41

Drawing................................................................................................................... 43

Declaration of Incorporation ................................................................................... 44

Appendix on Declaration of Incorporation, as per 2006/42/EC, Annex II, No. 1 B ..... 45

General

02.00|ROTA NCA |en

General

About this manual

This manual contains important information for a safe and

appropriate use of the product.

This manual is an integral part of the product and must be kept

accessible for the personnel at all times.

Before starting work, the personnel must have read and

understood this operating manual. Prerequisite for safe working is

the observance of all safety instructions in this manual.

Illustrations in this manual are provided for basic understanding

and may differ from the actual product design.

In addition to these instructions, the documents listed under

(1.1.2, Page 6) are applicable.

Presentation of Warning Labels

To make risks clear, the following signal words and symbols are

used for safety notes.

DANGER

Danger for persons!

Non-observance will inevitably cause irreversible injury or death.

WARNING

Dangers for persons!

Non-observance can lead to irreversible injury and even death.

CAUTION

Dangers for persons!

Non-observance can cause minor injuries.

CAUTION

Material damage!

Information about avoiding material damage.

1.1

1.1.1

General

02.00|ROTA NCA |en

Applicable documents

•General terms of business*

•Catalog data sheet of the purchased product *

•Calculation of the jaw centrifugal forces, "Technology" chapter

in the lathe chuck catalog *

The documents marked with an asterisk (*) can be downloaded on

our homepage schunk.com

Sizes

This operating manual applies to the following sizes:

•ROTA NCA 160-32

•ROTA NCA 200-52

•ROTA NCA 225-66

•ROTA NCA 280-86

•ROTA NCA 330-104

Warranty

The warranty period is 24 months after delivery date from factory

or 500 000 cycles*, if it is used as intended, under the following

conditions:

•Observe the applicable documents, (1.1.2, Page 6)

•Observe the ambient conditions and operating conditions,

(2.6, Page 10)

•Observe the specified maintenance and lubrication intervals,

(7, Page 38)

Parts touching the workpiece and wear parts are not included in

the warranty.

* A cycle consists of a complete clamping process ("Open" and

"Close").

1.1.2

1.1.3

1.2

General

02.00|ROTA NCA |en

Scope of Delivery

Power lathe chuck in the version ordered

Mounting screws

T-nuts with screws or 3 combination T-nuts

Assembly key from size 280

Eye bolt

1.3

Basic safety notes

02.00|ROTA NCA |en

Basic safety notes

Intended use

This product is intended for clamping workpieces on machine tools

and other suitable technical devices.

•The product may only be used within the scope of its technical

data, (3, Page 19).

•The product is intended for industrial and industry-oriented

use.

•Appropriate use of the product includes compliance with all

instructions in this manual.

•The maximum RPM of the chuck and the required clamping

force must be determined by the user for the respective

clamping task based on the applicable standards and technical

specifications of the manufacturer.

(See also “Calculations for clamping force and RPM” in the

chapter “Technical data”). (3, Page 19)

Not intended use

A not intended use of the product is for example:

•It is used as a press, a punch, a toolholder, a load-handling

device or as lifting equipment.

•the product is used for unintended machines or workpieces.

•the technical data is exceeded when using the product.

(3, Page 19)

•if workpieces are not clamped properly, paying particular

attention to the clamping forces specified by the manufacturer.

•if it is used in working environments that are not permissible.

•if the product is operated without a protective cover.

2.1

2.2

Basic safety notes

02.00|ROTA NCA |en

Constructional changes

Implementation of structural changes

By conversions, changes, and reworking, e.g. additional threads,

holes, or safety devices can impair the functioning or safety of the

product or damage it.

•Structural changes should only be made with the written

approval of SCHUNK.

Spare parts

Use of unauthorized spare parts

Using unauthorized spare parts can endanger personnel and

damage the product or cause it to malfunction.

•Use only original spare parts or spares authorized by SCHUNK.

Chuck jaws

Requirements of the chuck jaws

Stored energy can make the product unsafe and poses the danger

of serious injuries and considerable material damage.

•Only change chuck jaws if no residual energy can be released.

•Do not use welded jaws.

•The chuck jaws should be designed to be as light and as low as

possible. The clamping point must be as close as possible to the

chuck face (clamping points at a greater distance lead to

greater surface pressure in the jaw guidance and can

significantly reduce the clamping force).

•If for constructional reasons the special chuck jaws are heavier

than the top jaws assigned to the lathe chuck, greater

centrifugal forces must be accounted for when defining the

required clamping force and the recommended speed.

2.3

2.4

2.5

Basic safety notes

02.00|ROTA NCA |en

•The maximum recommended speed may only be operated in

conjunction with maximum actuating force and only with the

lathe chuck in optimum, fully functioning condition.

•After a collision, the lathe chuck and the chuck jaws must be

subjected to a crack test before being used again. Damaged

parts must be replaced with original SCHUNK spare parts.

•Renew the chuck jaw mounting screws if there are signs of

wear or damage. Only use screws with a quality of 12.9.

•Screw the jaw mounting screws into the bore holes furthest

apart.

Environmental and operating conditions

Required ambient conditions and operating conditions

Incorrect ambient and operating conditions can make the product

unsafe, leading to the risk of serious injuries, considerable material

damage and/or a significant reduction to the product's life span.

•Make sure that the product is used only in the context of its

defined application parameters, (3, Page 19).

•Make sure that the product is a sufficient size for the

application.

•Only use high-quality cooling emulsions with anti-corrosive

additives during processing.

Clamping force measurement

Depending on the operating conditions, the function and clamping

force must be checked after a certain period of operation

(7.2, Page 39).

With the smallest possible actuating pressure (hydraulic cylinder),

the base jaws should move evenly. This method only provides a

limited indication and is not a substitute for measuring the

clamping force.

2.6

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