Schaeffler RT Series Mode d’emploi

Precision strain wave gears

Series RT

Mounting manual

Schaeffler Technologies

MON 106

Page

Contents

Precision strain wave gears

About the mounting manual

Availability........................................................................... 2

Legal guidelines................................................................... 2

Symbols............................................................................... 2

Images................................................................................. 2

General safety guidelines

Usage for the intended purpose............................................ 3

Usage not for the intended purpose ...................................... 3

Selection and qualification of personnel............................... 4

Personal protective equipment ............................................. 4

Safety regulations ................................................................ 4

Scope of delivery

Damage during transit .......................................................... 5

Defects ................................................................................ 5

Strain wave gear RT..-H-..-BHS

Preparation for mounting

Cleanliness .......................................................................... 6

Overview.............................................................................. 6

Mounting surfaces ............................................................... 7

Mounting.................................................................................. 8

Running-in process ................................................................... 12

Strain wave gear RT..-H-..-BMS

Preparation for mounting

Cleanliness .......................................................................... 14

Overview.............................................................................. 14

Mounting surfaces ............................................................... 15

Mounting.................................................................................. 16

Running-in process ................................................................... 20

Strain wave gear RT..-H-..-UHS

Preparation for mounting

Cleanliness .......................................................................... 22

Overview.............................................................................. 22

Mounting surfaces ............................................................... 23

Mounting.................................................................................. 23

Decommissioning and

disposal

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

MON 106

Schaeffler Technologies

Precision strain wave gears

About the mounting manual

This mounting manual serves as an aid in mounting strain wave

gears safely and correctly.

The manual contains important information on:

■

avoiding personal injury or damage to property

■

mounting the strain wave gear correctly to ensure functionality

The original language of the manual is German.

All other languages are translations from the German language.

Availability

A current electronic version (PDF) of this manual can be found at

https://www.schaeffler.de/std/1F3F

Legal guidelines

The information in this manual reflects the status as of July 2022.

Unauthorised modifications to or improper use of the product are

not permitted. Schaeffler does not assume any liability in this

respect.

The information and instructions contained in this document, in the

catalogue and in the customer delivery drawing must be observed.

Special and customer-specific designs may differ in technical

detail from the designs covered in this publication. It is strongly

recommended that you contact Schaeffler, quoting the type

designation and serial number, if any clarification is required.

Symbols

The warning and hazard symbols are defined in accordance with

ANSI Z535.6-2011.

NOTICE

In case of non-compliance, damage or malfunctions in the product

or the adjacent construction may occur.



Images

The images in this manual are examples and may differ from

the delivered product.

Further information

For any questions relating to mounting, please consult your local

contact at Schaeffler.

Schaeffler Technologies

MON 106

General safety guidelines

Usage for the intended

purpose

Strain wave gears of series RT are intended for industrial or

commercial applications.

Typical application areas include:

■

robots and handling

■

medical equipment

■

industrial machinery

■

machine tools

The strain wave gears may only be operated within the operating

ranges and environmental conditions specified in the documen-

tation.

Fundamental health and safety requirements were taken into

account during the development, design and production stages.

Under the terms of the EC Machinery Directive, strain wave gears of

series RT are classified as machine components, not incomplete

machines. Machine components do not fall within the scope of the

EC Machinery Directive.

Before commissioning equipment and machinery fitted with strain

wave gears of series RT, the conformity of the equipment or machine

with the EC Machinery Directive must be ensured.

Usage not for the intended

purpose

Use of the strain wave gears outside of the aforementioned

application areas or under operating ranges and environmental

conditions which deviate from those described in the documen-

tation is considered incorrect usage.

Use of the strain wave gears in the following application areas is

considered incorrect use:

■

aviation and aerospace

■

areas with an explosion risk

■

machinery specifically designed or used for nuclear applications,

the failure of which may result in the emission of radioactivity

■

vacuum

■

devices for domestic use

■

medical equipment that comes into direct contact with the

human body

■

machinery or equipment used to transport and lift people

■

special equipment for use in fairgrounds and amusement parks

MON 106

Schaeffler Technologies

Precision strain wave gears

Selection and qualification

of personnel

Strain wave gears may only be fitted by qualified personnel.

Qualified personnel:

■

are authorised

■

have all the necessary knowledge

■

are familiar with the safety regulations

Personal protective equipment

Personal protective equipment protects against health hazards.

For your own safety, always use safety shoes and clean safety

gloves.

Depending on the mounting location and on the machine or equip-

ment, it may be necessary to use additional personal protective

equipment. Further information on this subject can be obtained from

your contact at Schaeffler.

Observe the applicable regulations relating to occupational safety

at the mounting location.

Safety specifications

In order to prevent the occurrence of personal injury or damage

to property, observe the following safety specifications.

Fundamental specifications

Keep the work area free of trip hazards.

Always carry out all mounting and maintenance work when the

machine or equipment is at a standstill. Do not reach into the work-

ing area of the gear unit while the shafts are still rotating.

Secure the machine or equipment against unintentional start-up

before carrying out mounting or maintenance work.

Observe the safety datasheet for the lubricant. Please address any

questions to your contact at Schaeffler.

Transport, storage, mounting

Do not open the strain wave gear packaging until immediately before

mounting.

Cleaning

Use volatile cleaning solvents, which allow residue-free cleaning,

to clean the surfaces of the gear unit. The solvents must be

compatible with the gear unit surfaces and with the corrosion

protection used, in order to avoid damage to the gear unit

surfaces.

Disposal

Dispose of any cloths soaked with grease or solvents, as well as

excess grease, packaging material and any other waste generated in

connection with mounting, by environmentally acceptable methods.

Observe the applicable legal regulations at the mounting location.

Schaeffler Technologies

MON 106

Environmental hazards

Pay attention to any safety risks that are not associated directly

with the strain wave gear, but are posed by the ambient conditions

at the mounting location. These may include dusts that are

hazardous to health or working at a considerable height.

Furthermore, the machine or equipment may also be a source

of hazards, for example, as a result of moving machine or equipment

parts.

Consult with a local safety engineer before starting mounting work

and observe all safety specifications that are applicable to the

mounting location, the machine or the equipment.

Scope of delivery

Please refer to the customer delivery drawing.

The scope of delivery comprises:

■

strain wave gear

■

accessories

–O-rings

– lubricant (for RT..-H-..-BHS and RT..-H-..-BMS)

Damage during transit



Check the delivery immediately upon arrival for any damage

during transit.



Report any damage during transit promptly as a complaint

to the carrier.

Defects



Check the strain wave gear immediately upon delivery for

externally visible defects.



Report any defects promptly as a complaint to the distributor

of the strain wave gear.

MON 106

Schaeffler Technologies

Strain wave gear RT..-H-..-BHS

Preparation for mounting

Cleanliness

NOTICE

No foreign bodies or mounting aids must be allowed to enter

the gear unit during mounting.

Contaminants and residues from cleaning agents can shorten

the operating life of the strain wave gear.

Only use volatile solvents and lint-free cloths for cleaning.



Measures for ensuring cleanliness are as follows:



Keep the mounting location, tools and clothing clean and free

from magnetic or magnetisable particles.



Clean the mounting surfaces on the gear parts.



Do not remove the strain wave gear from its packaging until

immediately before mounting.

Overview

An overview of the components used in the strain wave gear can

be found in the following illustration.

O1, O2 = O-rings



Flexspline



Double row angular contact

needle roller bearing

XZU-RTH



Circular spline



Wave generator bearing



Input shaft



Wave generator



Retaining screws

Figure 1

Components of RT..-H-..-BHS

O2O1

0019F0220019F022

Schaeffler Technologies

MON 106

Mounting surfaces

Observe the following instructions in relation to the mounting

surfaces.

NOTICE

Damage due to anti-corrosion oil.

The gear unit is supplied with anti-corrosion oil.

Remove the anti-corrosion oil prior to mounting.



NOTICE

Damage due to incompatible components.

The main components of the gear unit (flexspline, circular spline,

input shaft and wave generator bearing) are matched to each other.

Do not substitute the components for components from other gear

units.





Motor shaft



Adjacent construction

(on the circular spline side)



Adjacent construction

(on the flexspline side)

Figure 2

Strain wave gear RT..-H-..-BHS

with adjacent construction

1112

0019F0240019F024

MON 106

Schaeffler Technologies

Strain wave gear RT..-H-..-BHS

Mounting

Wear clean gloves when working on the gear unit to prevent

corrosion.

Do not remove the strain wave gear from its packaging until immedi-

ately before mounting.

The gear teeth, wave generator bearing and double row angular

contact needle roller bearing XZU-RTH are supplied ready lubricated.

NOTICE

Damage to property due to removal of individual parts.

Do not remove any screws from the circular spline.



Lubricate the flexspline and

adjacent construction



Lubricate the interior of the flexspline



using the lubricant

provided.

For the amount of lubricant required, please refer to the customer

delivery drawing.



Distribute the lubricant evenly.



Apply the lubricant provided to surface A of the adjacent

construction



For the amount of lubricant required, please refer to the customer

delivery drawing.

Figure 3

Lubricate the flexspline

0019F0260019F026

Figure 4

Lubricate the adjacent construction

0019F0280019F028

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