Nabtesco RV RH E Series User manual

ERD15018A
2016/10/01
Precision Reduction Gear RV
TM
High Precision Gearhead
RH Series
Operation Manual
<Applicable model>
RH-E
RH-C
RH-N
above indicates the torque code (number).
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
Chapter 3 Transportation and storage of product...................................................... 6
3.1. Transportation ............................................................................................................................................ 6
3.2. Storage ....................................................................................................................................................... 7
Chapter 4 Preparations for installation ....................................................................... 8
4.1. Installation environment ............................................................................................................................ 8
4.2. Preparation of required components .......................................................................................................... 9
4.3. Unpacking................................................................................................................................................ 14
4.4. Lifting of this product .............................................................................................................................. 16
Chapter 5 Installation.................................................................................................. 17
5.1. Bolt tightening torque .............................................................................................................................. 17
5.2. Installation work ...................................................................................................................................... 18
Contents

Contents
Chapter 6 Filling the Lubricant .................................................................................. 36
6.1. Precautions when handling the lubricant ................................................................................................. 36
6.2. Reduction gear mounting direction and amount of lubricant................................................................... 38
6.3. Lubricant filling procedure ...................................................................................................................... 40
Chapter 7 Operation.................................................................................................... 42
7.1. Checking before operation....................................................................................................................... 42
7.2. Running-in operation ............................................................................................................................... 42
7.3. Precautions for operation ......................................................................................................................... 42
Chapter 8 Maintenance and Inspection..................................................................... 43
8.1. Precautions on maintenance..................................................................................................................... 43
8.2. Daily inspection ....................................................................................................................................... 43
8.3. Lubricant replacement.............................................................................................................................. 44
8.4. Troubleshooting checksheet..................................................................................................................... 47
Contact information

Important Information
i
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. Failure to do so could cause
injury or damage to the reduction gear.
The specifications indicated in the specification sheet 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

Important Information
ii
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.

About This Manual
iii
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

Warranty
iv
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

Glossary
v
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 precision gearhead RH series of the
product.
Glossary
Load torque
Time
External shock torque
Max. torque for startup
Constant torque
Shock torque at
emergency stop
Max.
torque for
stop

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. Failure
to do so could cause injury or damage to the reduction gear.
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. Failure to do so 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 become extremely hot during operation. After stopping the operation,
never touch the reduction gear until 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 may not be filled with lubricant, depending on the customer's specifications. For
such product, fill it 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. Failure to do so could cause damage to
the reduction gear.
Note