SCHUNK ROTA NCR-A 190 Gebrauchsanweisung

Translation of the original manual

Power Chuck

ROTA-NCR-A

Assembly and operating manual

Superior Clamping and Gripping

Imprint

03.00|1341130_ROTA NCR-A |en

Imprint

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

reserved. Any reproduction, processing, distribution (making available to third parties),

translation or other usage - even excerpts - of the manual is especially prohibited and

requires our written approval.

Technical changes:

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

Document number: 1341130

Version: 03.00 |13/05/2019|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

Table of Contents

03.00|1341130_ROTA NCR-A |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 ...................................................................................................... 6

Basic safety notes .................................................................................................... 7

2.1

Intended use............................................................................................................. 7

2.2

Not intended use ...................................................................................................... 7

2.3

Constructional changes ............................................................................................ 7

2.4

Spare parts................................................................................................................ 8

2.5

Chuck jaws ................................................................................................................ 8

2.6

Environmental and operating conditions................................................................. 9

2.7

Personnel qualification............................................................................................. 9

2.8

Personal protective equipment.............................................................................. 10

2.9

Notes on safe operation......................................................................................... 11

2.10

Transport ................................................................................................................ 11

2.11

Malfunctions........................................................................................................... 11

2.12

Disposal................................................................................................................... 12

2.13

Fundamental dangers............................................................................................. 12

2.13.1

Protection during handling and assembly .................................................. 12

2.13.2

Protection during commissioning and operation ....................................... 13

2.13.3

Protection against dangerous movements................................................. 13

2.13.4

Notes on particular risks ............................................................................. 14

Technical data ......................................................................................................... 18

3.1

Chuck data .............................................................................................................. 18

3.2

Clamping force / speed diagrams........................................................................... 19

3.3

Calculations for clamping force and speed ............................................................ 23

3.3.1

Calculation of the required clamping force in case of a given rpm............ 23

3.3.2

Calculation example: required initial clamping force for a given speed .... 25

3.3.3

Calculation of the permissible speed in case of a given initial clamping

force ............................................................................................................ 27

3.4

Grades of Accuracy................................................................................................. 28

3.5

Permissible imbalance............................................................................................ 28

Torques per screw ................................................................................................... 28

Table of Contents

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Mounting ................................................................................................................ 29

5.1

Installing and connecting ....................................................................................... 29

5.2

Checking the chuck mounting ................................................................................ 29

5.3

Assembly of the chuck on the machine ................................................................. 30

5.3.1

Mounting the chuck with a reduction or extension flange ........................ 32

5.3.2

Mounting the chuck by means of a direct mount ...................................... 33

5.4

Replacement of jaws .............................................................................................. 34

5.5

Switching the compensating clamping on and off ................................................. 35

Function .................................................................................................................. 36

6.1

Function and handling............................................................................................ 36

6.2

Functional testing ................................................................................................... 36

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

7.1

Maintenance intervals............................................................................................ 38

7.2

Disassembly and assembly of the Chuck................................................................ 38

7.3

Disassembling and assembling the piston ............................................................. 40

7.4

Lubrication.............................................................................................................. 41

Spare parts.............................................................................................................. 42

Assembly drawings.................................................................................................. 44

Translation of the original declaration of incorporation ........................................... 47

Appendix on Declaration of Incorporation, as per 2006/42/EC, Annex II, No. 1 B ..... 48

General

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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.

NOTICE

Material damage!

Information about avoiding material damage.

1.1

1.1.1

General

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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 NCR-A

190; 225; 250; 315; 400; 500; 630; 800; 1000

•ROTA NCR-A with centrifugal force compensation

225; 250; 315; 400; 500; 630

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 9)

•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").

Scope of delivery

Power Chuck

Fastening screws (up to size 400)

Fastening screws (from size 500 on)

T-nuts for fine serration

Screws for tongue and groove

Eye bolt from size 250 and up

Operating manual

1.1.2

1.1.3

1.2

1.3

Basic safety notes

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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 18).

•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 18)

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 18)

•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.

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.

2.1

2.2

2.3

Basic safety notes

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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.

•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.

2.4

2.5

Basic safety notes

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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 18).

•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 tester

Depending on the operating conditions, the function and clamping

force must be checked after a certain period of operation

(7.1, Page 38). Only use a calibrated clamping force tester for

measuring during the clamping force test.

With the smallest possible actuating pressure (clamping cylinder),

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

limited indication and is not a substitute for measuring the

clamping force.

If the clamping force has dropped too much or if the base jaws and

pistons no longer move properly, the chuck must be disassembled,

cleaned, and relubricated (7, Page 38).

Personnel qualification

Inadequate qualifications of the personnel

If the personnel working with the product is not sufficiently

qualified, the result may be serious injuries and significant

property damage.

•All work may only be performed by qualified personnel.

•Before working with the product, the personnel must have read

and understood the complete assembly and operating manual.

•Observe the national safety regulations and rules and general

safety instructions.

2.6

2.7

Basic safety notes

03.00|1341130_ROTA NCR-A |en

The following personal qualifications are necessary for the various

activities related to the product:

Due to their technical training, knowledge and experience, trained

electricians are able to work on electrical systems, recognize and

avoid possible dangers and know the relevant standards and

regulations.

Due to its technical training, knowledge and experience, qualified

personnel is able to perform the delegated tasks, recognize and

avoid possible dangers and knows the relevant standards and

regulations.

Instructed persons were instructed by the operator about the

delegated tasks and possible dangers due to improper behaviour.

Due to its technical training, knowledge and experience, service

personnel of the manufacturer is able to perform the delegated

tasks and to recognize and avoid possible dangers.

Personal protective equipment

Use of personal protective equipment

Personal protective equipment serves to protect staff against

danger which may interfere with their health or safety at work.

•When working on and with the product, observe the

occupational health and safety regulations and wear the

required personal protective equipment.

•Observe the valid safety and accident prevention regulations.

•Wear protective gloves to guard against sharp edges and

corners or rough surfaces.

•Wear heat-resistant protective gloves when handling hot

surfaces.

•Wear protective gloves and safety goggles when handling

hazardous substances.

•Wear close-fitting protective clothing and also wear long hair in

a hairnet when dealing with moving components.

Trained electrician

Qualified personnel

Instructed person

Service personnel of

the manufacturer

2.8

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