Precision Gear Technology Catalog
NIDEC DRIVE TECHNOLOGY CORPORATION
Letter from the President
The Nidec Drive Technology Corporation was originally founded in Kyoto
Japan in 1952. Since our inception, we have made every possible eff ort to
improve our manufacturing skill and capabilities, including the advance-
ment of power transmission products to support new technologies and
markets. Nidec DTC initially established an industry-wide leadership po-
sition in the area of mechanical variable speed drives. We are very proud
of our storied past with mechanical drive technology, through which
Nidec DTC helped contribute to the growth of the emerging industries
that are now the cornerstone of our world economy today.
Over time, within the  eld of power transmission engineering, Nidec DTC
has maintained the highest level of skill and production quality through-
out the industry. We have earned a reputation as a long term dependable
partner to our customers, and this solid reputation is  rmly supported
by the many industrial awards we hold, such as the Japanese Machinery
Society Award, and Deming Award, among others.
Today, the growing global market for motion control has driven us to
continuously develop products that provide the highest level of accuracy,
reliability and value for our customers. We are technical experts across all
of the various gear technologies we off er, and are the only company in
the world producing such a wide range of product. Our Precision Gear
Technology Catalog provides in-depth technical detail for our planetary,
worm, cycloidal and rotary index table products.
Nidec DTC promises to continue to provide high precision power trans-
mission products at unmatched value, which solve the new requirements
of our customer base and allow them to be competitive in an increasingly
tough global market. Within our company, we have coined this promise
as “Enduring Process of Nidec DTC” - a pledge by our employees to ap-
proach all of their day-to-day work activities with full eff ort, full dedica-
tion, and full energy to support the evolving needs of our customers.
Your continued support and loyal patronage to our company is highly
appreciated. Thank you for your time.
Best Regards,
President
T. Nishimoto
VRSFVRT VRBEVL VRLNEV VRSEVBSTH EVSEVTERH STR EJMEJHEJPEJS EJL
Table of contents
Commercial Information .................................................................................. 472-477
Company Overview
...................................................................................... 2‐15
Technical Information
.................................................................................... 458-471
Inline Planetary Gearboxes Right-angle Worm Gearboxes
Rotary Index Tables
Cycloidal Gearboxes
Right-angle Planetary Gearboxes
VRL Series ....................... 28‐59
Planetary Inline Conguration
General purpose
VRSF Series ...................... 16‐27
Planetary Inline Conguration
Economy class
VRB Series .......................60‐91
Planetary Inline Conguration
High accuracy, thru bolt mount
VRS Series ...................... 92‐123
Planetary Inline Conguration
High accuracy, high bearing capacity
NEV Series ..................... 160‐179
Planetary Right-angle Conguration
Economy class, hollow and solid shaft
EVL Series .....................180‐207
Planetary Right-angle Conguration
General purpose
EVB Series .....................208‐235
Planetary Right-angle Conguration
High accuracy, thru bolt mount
EVS Series .....................236‐267
Planetary Right-angle Conguration
High accuracy, high bearing capacity
EVT Series .....................268‐295
Planetary Right-angle Conguration
High accuracy and bearing capacity, ISO ange mount
STH Series .....................408‐415
Hollow Rotary Index Table
General purpose, lighter loads
STR Series .....................416‐445
Hollow Rotary Index Table
Arc-second accuracy, high loads
ERH Series .................... 446‐457
Inline Cycloidal Conguration
High shock-load, industrial duty
VRT Series ..................... 124‐159
Planetary Inline Conguration
High accuracy and bearing capacity, ISO ange mount
EJM Series ..................... 296‐313
Right-angle Worm Conguration
Economy class
EJH Series ......................350‐367
Right-angle Worm Conguration
Heavy duty class, wide mounting range
EJP Series ......................368‐385
Right-angle Worm Conguration
High performance class, wide mounting range
EJS Series ..................... 386‐407
Right-angle Worm Conguration
Hygienic class
EJL Series ......................314‐349
Right-angle Worm Conguration
Performance class, wide mounting range