Nabtesco RV N Series User manual

ERD15003B
Oct 1, 2016
Precision Reduction Gear RVTM
N series
Operation Manual
<Applicable model>
RV-N△
above indicates the torque code.
△above indicates the series code.
For the applicable models, refer to “Model” indicated on the shipping label of the product.
This manual must be thoroughly read and understood before using the product.
Be sure to deliver this operation manual to the system manager and the person in
charge of the operation.
Keep this manual in the specified location so that it can be immediately referred to
whenever necessary.
®

Contents
Important Information ......................................................................................................i
1. Intended use of this product......................................................................................................................i
2. Rules to ensure safe use of this product................................................................................................. i
3. Sharing of hazard information with users................................................................................................. ii
4. Product disposal..................................................................................................................................... ii
5. Other important notes .............................................................................................................................. ii
About This Manual..........................................................................................................iii
1. Users of this manual................................................................................................................................ iii
2. Copyrights ............................................................................................................................................... iii
Warranty .......................................................................................................................... iv
Glossary ........................................................................................................................... v
Chapter 1 About Safety ................................................................................................1
1.1. About warnings....................................................................................................................................1
1.2. Type and indication of warning............................................................................................................1
1.3. General precautions ............................................................................................................................2
Chapter 2 Product Overview ........................................................................................3
2.1. Name of each section..........................................................................................................................3
2.2. Parts codes of catalog products..........................................................................................................3
Chapter 3 Transportation and Storage of Product.....................................................4
3.1. Transportation .....................................................................................................................................4
3.2. Storage................................................................................................................................................5
Chapter 4 Preparations for Installation .......................................................................6
4.1. Installation environment ......................................................................................................................6
4.2. Preparation of required components...................................................................................................7
4.3. Unpacking .........................................................................................................................................16
4.4. Lifting of this product .........................................................................................................................20
Chapter 5 Installation..................................................................................................21
5.1. Bolt tightening torque ........................................................................................................................21
5.2. Installation work.................................................................................................................................22
Contents

Contents
Chapter 6 Filling the Lubricant .................................................................................. 32
6.1. Precautions when handling the lubricant ..........................................................................................32
6.2. Reduction gear mounting direction and amount of lubricant ............................................................34
6.3. Lubricant filling procedure .................................................................................................................37
Chapter 7 Operation.................................................................................................... 39
7.1. Checking before operation ................................................................................................................39
7.2. Break-in operation .............................................................................................................................39
7.3. Precautions for operation ..................................................................................................................39
Chapter 8 Maintenance and Inspection..................................................................... 41
8.1. Precautions on maintenance.............................................................................................................41
8.2. Daily inspection .................................................................................................................................41
8.3. Lubricant replacement.......................................................................................................................42
Appendix: Design Scheme of Input Gear .................................................................. 44
NABTESCO CONTACT INFORMATION
Contents

Important Information
1. Intended use of this product
This product was designed and manufactured as a reduction gear that decelerates the rotation of the motor and
transmits the rotational torque. Do not use this product for other purposes.
Do not modify the reduction gear or use it outside its specified range. This could cause injury or
damage to the reduction gear.
The specifications indicated in the product catalog are based on Nabtesco evaluation methods. This
product should only be used after confirming that it is appropriate for the operating conditions of
your system. Failure to do so could cause injury or damage to the reduction gear.
2. Rules to ensure safe use of this product
It is impossible for Nabtesco Corporation (referred to as “Nabtesco” hereafter) to foresee any potential hazards
related to this product and hazards caused by human errors or peripheral devices.
There are also various points that must be observed and operations that are prohibited in relation to the use of
this product, but it is also impossible to note all of them in this manual.
For this reason, it is necessary to take appropriate safety measures when operating this product, in addition to
the points noted in this manual.
The particularly important information for safe handling of this product is noted below. This information
applies to all workers involved, including the manager and supervisor of this product.
The “procedures” referred to in this manual indicate all the acts performed on this product during
transportation, installation, operation, and maintenance/inspection.
Be sure to read this manual
Before using this product, thoroughly read this manual and understand all the content of this manual.
Also, observe the safety precautions described in this manual.
Conditions for workers
• The worker must have a fundamental knowledge of this product
• The worker must be aware of the potential hazards of this product and have adequate knowledge to
avoid hazardous situations
• The worker must be able to take appropriate measures to avoid hazardous situations
Important
Information
i

Important Information
Observe the relevant laws, regulations, ordinances, and bylaws.
Observe the relevant laws, regulations, ordinances, and bylaws enacted by the related countries and
local governments.
Prevention of accidents
To prevent accidents, do not perform any procedures not noted in this manual. Also, do not use this
product for any purposes other than those noted at the beginning of this manual.
If any abnormalities are found, take appropriate measures immediately to prevent any accidents,
serious injury, or damage.
• Everyone, including workers and supervisors, must voluntarily take measures to ensure safety and
well-being, as this can prevent accidents.
3. Sharing of hazard information with users
When selling or transferring this product embedded in a device, etc., hand this manual to the person who
actually uses or manages the device (the person/group in charge). Or, add the necessary information concerning
handling and maintenance procedures for preventing the accidents and failures described in this manual to the
contents of the operation manual of the device.
4. Product disposal
When disposing of this product, drain the lubricant completely and handle it according to the ordinances of the
local government and entrust the disposal to an industrial waste disposal specialist.
5. Other important notes
It is strictly prohibited to reverse-engineer the internal parts of this product.
ii

About This Manual
1. Users of this manual
This manual is intended for native speakers of English. If this product is operated by non-native speakers of
English, the customer is responsible for conducting safety training and giving operation instructions to those
workers.
2. Copyrights
The copyright for this manual belongs to Nabtesco Corporation. Unauthorized reprinting, reproduction,
copying, or translation of this manual in whole or in part is strictly prohibited.
About This Manual
iii

Warranty
1. In the case where Nabtesco confirms that a defect of the Product was caused due to
Nabtesco’s design or manufacture within the Warranty Period of the Product, Nabtesco
shall repair or replace such defective Product at its cost. The Warranty Period shall be
from the delivery of the Product by Nabtesco or its distributor to you (“Customer”) until
the end of one (1) year thereafter, or the end of two thousand (2,000) hours from the
initial operation of Customer's equipment incorporating the Product at end user's
production line, whichever comes earlier.
2. Unless otherwise expressly agreed between the parties in writing, the warranty
obligations for the Product shall be limited to the repair or replacement set forth herein.
OTHER THAN AS PROVIDED HEREIN, THERE ARE NO WARRANTIES ON THE
PRODUCT, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE.
3. The warranty obligation under Section 1 above shall not apply if:
a) the defect was caused due to the use of the Product deviated from the Specifications or
the working conditions provided by Nabtesco;
b) the defect was caused due to exposure to foreign substances or contamination (dirt,
sand etc.);
c) lubricant or spare part other than the ones recommended by Nabtesco was used in the
Product;
d) the Product was used in an unusual environment (such as high temperature, high
humidity, a lot of dust, corrosive/volatile/inflammable gas, pressurized/depressurized
air, under water/liquid or others except for those expressly stated in the
Specifications);
e) the Product was disassembled, re-assembled, repaired or modified by anyone other
than Nabtesco;
f ) the defect was caused due to the equipment into which the Product was installed;
g) the defect was caused due to an accident such as fire, earthquake, lightning, flood or
others; or
h) the defect was due to any cause other than the design or manufacturing of the Product.
4. The warranty period for the repaired/replaced Product/part under Section 1 above shall be
the rest of the initial Warranty Period of the defective Product subjected to such
repair/replace.
Warranty
iv

Glossary
Rated service life
The lifetime resulting from the operation with the rated torque and the rated output speed is referred to as
the “rated service life”.
Allowable acceleration/deceleration torque
When the machine starts or stops, the load torque to be applied to the reduction gear is larger than the
constant-speed load torque due to the effect of the inertia torque of the rotating part. In such a situation, the
allowable torque during acceleration/deceleration is referred to as “allowable acceleration/deceleration
torque”.
Note: Be careful that the load torque, which is applied at startup and stop, does not exceed the allowable
acceleration/deceleration torque.
Momentary maximum allowable torque
A large torque may be applied to the reduction gear due to execution of emergency stop or by an external
shock. In such a situation, the allowable value of the momentary applied torque is referred to as
“momentary maximum allowable torque”.
Note: Be careful that the momentary excessive torque does not exceed the momentary maximum allowable
torque.
Allowable output speed
The allowable value for the reduction gear’s output speed during operation without a load is referred to as
the “allowable output speed”.
Note: Depending on the conditions of use (duty ratio, load, ambient temperature), the reduction gear surface
temperature may exceed 60°C even when the speed is under the allowable output speed. In such a case,
either take cooling measures or use the reduction gear at a speed that keeps the surface temperature at 60°C
or lower.
Allowable Moment and Maximum Thrust Load
The external load moment or thrust load may be applied to the reduction gear during normal operation. The
allowable values at this time are referred to as “allowable moment” and “maximum thrust load”
respectively.
Note 1: The above specification values are noted in the catalog or separately provided specification sheet.
Note 2: The “reduction gear” described in this manual indicates the N series of the product.
Glossary
Load torque
External shock torque
Max. torque for startup
Constant torque
Time
Max. torque
for stop
Shock torque at emergency stop
V

Chapter 1 About Safety
1
Chapter 1 About Safety
The safety precautions noted in this chapter should be used as guidelines to prevent injury of workers who
perform transportation, installation, operation, and maintenance of this product, as well as damage to the
product.
1.1. About warnings
This manual alerts workers to hazardous situations and precautions related to this product in the following
manner:
1. Safety regulations are described in Chapter 1 “About safety” in this manual
2. Warning statements are noted in this manual
1.2. Type and indication of warning
Warnings for potential hazards during operation are given according to the following four categories in this
manual. If you fail to observe these warning statements, it could result in lethal injury or serious damage and
malfunction of the product.
Indicates a hazardous situation that, if not avoided, is highly likely to result in
death or serious injury.
Indicates a potentially hazardous situation that, if not avoided, could result in
death or serious injury.
Indicates a potentially hazardous situation that, if not avoided, could result in
minor or moderate injury.
Indicates a potentially hazardous situation that, if not avoided, could result in
physical damage.
Provides important information for correct use of this product, as well as
supplemental explanation for the main body of the text or other information that
helps to prevent erroneous operation.
Note
Important

Chapter 1 About Safety
2
1.3. General precautions
This section describes general precautions for safe use of this product. For precautions concerning
transportation, installation, operation, maintenance, and inspection, be sure to confirm the contents of the
relevant chapter.
Do not modify or disassemble the reduction gear in a manner not described in this manual. It could
cause injury or damage to the reduction rear.
Transportation, installation, operation, maintenance, and inspection of the reduction gear must be
performed by personnel who fully understand this manual. The person in charge of the operation
and manager of the reduction gear must not allow anyone without an understanding of the contents
of this manual to operate it. It could cause injury or damage to the reduction gear.
Do not put your fingers or any object into the opening of the reduction gear. If a belt or chain is used
for connection of the drive sections, do not put your fingers or any object into the clearance of the
protective cover, etc., as it could cause injury.
If any abnormalities or damage to the reduction gear are found, stop the operation immediately.
Incorrect motion could cause injury.
The reduction gear could be extremely hot during operation. After stopping the operation, never
touch the reduction gear before it is completely cooled. Touching the reduction gear could cause
burns.
Handle the lubricant according to the instructions given in this manual. Failure to do so could impair
your health.
This reduction gear is not filled with lubricant. Fill the reduction gear with an appropriate amount of
Nabtesco-recommended lubricant before use. Failure to do so could cause damage to the reduction
gear.
Return the tools and other necessary items to the specified location after use. If a tool, bolt, nut, or
other foreign object is trapped in the system, it could cause damage to the reduction gear.
Avoid excessive impact or vibration of the reduction gear. It could cause damage to the reduction
gear.
Note