The document discusses the HPN series of precision planetary gearheads from Harmonic Drive. The gearheads deliver precision and value with a compact, lightweight design that incorporates helical gears for quiet performance and long life. They are available with short lead times and can couple to any servo motor. The gearheads are suitable for a wide range of automation and machinery applications. Tables provide specifications on torque ratings, speeds, dimensions, and efficiency for various models.

1. High Performance Gearheads for Servomotors
HPN Series Precision Planetary Gearheads
Affordable Precision

2. HPN Series Precision Planetary Gearheads
Affordable Precision
The HPN precision planetary gearhead delivers both precision and value. The compact and light weight design incorporates
helical gears for quiet performance and long life. These gearheads are available with short leadtimes and are designed to
couple to any servo motor using our Quick-Connect coupling.
This new series of gears carry the reputation for quality and reliability for which Harmonic Drive™ products are known
throughout the world. HPN gearheads are suitable for use in a wide range of applications for automation, medical and
packaging equipment as well as machine tools and robots.
2 Application Examples
Machine Tool Gantry Robot Power Press
Pipe Bending Machine
Chain
Rack and pinion
Belt
HPN
HPN
HPN

3. High Performance Gearheads for Servomotors
3
1. Ordering Code
HPN
HPN 14 A 05 J6 AA-AB1
Reduction Ratio Input Configuration
J 6：
J 8 ：
With a key and center
tapped hole
Smooth shaft with center
tapped hole
This code represents the motor mounting
configuration. (This code differs depending on the
motor to be used. Please contact an
applications engineer at Harmonic Drive for the
mounting codes of motors not listed in the
matching table.)
Model Name Model No. Design Revision Output Shaft Options
11,14, A
20,32,40
4,5,7,10,
13,21,31
Speak with an applications engineer or check our website for specifications
Size
Backlash
arc-min
Noise *
dB
2. Performance
Reduction Ratio
4
5
7
10
16
20
30
3
4
5
7
10
13
21
31
3
4
5
7
10
13
21
31
3
4
5
7
10
13
21
31
3
4
5
7
10
13
21
31
5 or less
7 or less
5 or less
7 or less
5 or less
7 or less
5 or less
7 or less
5 or less
7 or less
56 or less
58 or less
60 or less
63 or less
65 or less
Number of
Stages
1
2
1
2
1
2
1
2
1
2
11
14
20
32
40
＊ The above noise values are reference values.

4. 3. Rating Table
Please contact an applications enginner with any questions about the specifications, comparisons to other manufacturers products or any other topic.
（1）
（2）
（3）
（4）
4 The torque that will have a 20,000 hour life at the rated input speed.
The maximum torque during acceleration and deceleration.
The instantaneous maximum torque in an emergency stop. (Maximum of 1000 emergency stops)
The maximum average input speed.
（5）
（6）
（7）
The instantaneous maximum input speed.
The load at which the output bearing will have 20,000 hour life at the rated input
speed. (Axial load = 0 and radial load point is in the center of the output shaft.)
The load at which the output bearing life will be 20,000 hours at the rated input
speed. (Radial load = 0 and axial load point is in the center of the output shaft.)
Size
Rated
Torque（１）
Nm
Repeated
Peak Torque （２）
Nm
Momentary
Peak Torque（3）
Nm
Rated Input
Speed（4）
rpm
Maximum
Input Speed（5）
rpm
Allowable
Radial Load（6）
N
Allowable
Axial Load（7）
N
4
5
7
10
16
20
30
3
4
5
7
10
13
21
31
3
4
5
7
10
13
21
31
3
4
5
7
10
13
21
31
3
4
5
7
10
13
21
31
14
14
11
9
18
22
25
22
28
29
30
18
30
30
30
51
80
80
80
54
80
80
80
153
198
200
200
185
200
200
200
440
460
480
510
480
530
620
700
14
16
11
9
24
24
26
25
50
50
37
18
43
50
38
74
130
149
113
54
130
147
113
254
376
376
376
185
376
376
376
752
752
752
752
509
752
752
752
40
40
40
40
40
40
40
89
110
107
100
79
106
99
101
226
256
256
256
216
256
256
256
625
625
625
625
625
625
625
625
1,137
1,265
1,265
829
829
823
1,029
1,097
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
3,000
10,000
10,000
10,000
10,000
10,000
10,000
10,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
6,000
240
260
280
320
360
400
480
380
420
450
510
570
630
740
840
830
920
1,000
1,100
1,230
1,350
1,600
1,800
1,800
1,900
2,000
2,300
2,600
2,900
3,400
3,900
2,800
3,100
3,400
3,800
4,200
4,500
5,000
5,500
280
320
360
420
460
560
640
340
380
410
480
580
630
780
900
900
1,100
1,200
1,400
1,600
1,850
2,100
2,200
2,000
2,300
2,500
2,900
3,200
3,600
3,800
3,800
2,700
3,000
3,300
3,800
4,200
4,500
5,000
5,400
1
2
1
2
1
2
1
2
1
2
11
14
20
32
40
Number of
Stages
Reduction
Ratio

5. High Performance Gearheads for Servomotors
Symbol
D1
D2
D3
D4
D6
D7
L1
L2
L3-1
L3-2
L5
L6
L7
L8
#14
70
5.5
16h7
50h7
M5
49
60
37
5
12
23
10
8
44
□L1
#11
50
3.4
13h7
35h7
M4
None
42
26
2.5
4
18
8
9
56
#20
100
6.6
22h7
80h7
M8
78
90
48
5
12
32
14
12
64
#32
130
9
32h7
110h7
M12
107
115
65
5
19
44
20
20
78.5
C9
L2 C8-2 C8-1
#40
165
11
40h7
130h7
M16
128
142
97
5
18
70
28
35
161
Symbol
C1
C2
C3
C4
C5
C6-1
C6-2
C6-3
C7
C8-1
C8-2
C9
C10
B1
H1
#14
5h9
18
#11
5h9
13
#20
6h9
24.5
#32
10h9
35
#40
12h9
43
4. Dimensions (Common for both single-stage and double-stage)
45°
45°
H1
B1 L5
C10
L8
L4 L7
C4
L3-2
L3-1
C6-1
C6-2
C6-3
□C7
C2
φC1
φD1
Output Shaft Ｊ８ Output Shaft Ｊ６
4-φD2
φD4
φD7
φD5
φD3
φC3
φC5
D6 L6
Dimensions C1
through C10 vary
depending on the
motor to be used.
Please contact
the Sales Division
for details.
5

6. HPN-11A
HPN-11A-04 HPN-11A-05 HPN-11A-07
100
80
70
60
50
40
30
20
10
00 1 2 3 4 5
Input Torque (Nm)
100
80
70
60
50
40
30
20
10
00 0.5 1 1.5
Input Torque (Nm)
100
80
70
60
50
40
30
20
10
00 0.2 0.4 0.6 0.8 1 1.2
HPN-14A
HPN-14A-04
Input Torque (Nm)
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
0 2 4 6 8 10
100
80
70
60
50
40
30
20
10
00 1 2 3 4
100
80
70
60
50
40
30
20
10
00 0.5 1 1.5
HPN-14A-05
Input Torque (Nm)
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%) 0 8 6 4 2
100
80
70
60
50
40
30
20
10
00 1 2 3
100
80
70
60
50
40
30
20
10
00 0.5 1 1.5
HPN-14A-07
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
0 1 2 3 4 5 6
Input Torque (Nm)
HPN-14A-13
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
0 1 2 3 4 0 0.2 0.4 0.6 0.8 1 1.2 1.4
Input Torque (Nm)
HPN-14A-21
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
0 0.5 1 1.5 2 2.5
Input Torque (Nm)
HPN-14A-31
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
Input Torque (Nm)
5. Efficiency
Efficiency measurment conditions
• Input speed: 3,000 rpm
• Ambient temperature: 25℃
• Efficiency values indicated in graphs are average values.
90
90
90
90
90
90
90
Input Torque (Nm)
Input Torque (Nm) Input Torque (Nm)
Input Torque (Nm) Input Torque (Nm)
Efficiency (%) Efficiency (%) Efficiency (%)
Efficiency (%) Efficiency (%)
Efficiency (%) Efficiency (%)
HPN-11A-10
HPN-11A-30
HPN-11A-16 HPN-11A-20
6

7. High Performance Gearheads for Servomotors
7
HPN-20A-04 HPN-20A-05 HPN-20A-07
0 5 10 15 20 25
HPN-20A-13
0 2 4 6 8 10
Efficiency measurment conditions
• Input speed: 3,000 rpm
• Ambient temperature: 25℃
• Efficiency values indicated in graphs are average values.
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
0 2 4 6 8 10 12 14
Input Torque (Nm)
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
0 5 10 15 20 25
Input Torque (Nm)
HPN-20A
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
Input Torque (Nm)
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
Input Torque (Nm)
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
HPN-20A-21
0 1 2 3 4 5 6 7
Input Torque (Nm)
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
HPN-20A-31
0 1 2 3 4 5
Input Torque (Nm)
5. Efficiency
HPN-32A-04
Input Torque (Nm)
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
0 10 20 30 40 50 60
HPN-32A-05
Input Torque (Nm)
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
0 10 20 30 40 50
HPN-32A-07
Input Torque (Nm)
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
0 5 10 15 20 25 30 35
HPN-32A-13
Input Torque (Nm)
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
0 5 10 15 20 25
HPN-32A-21
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
0 2 4 6 8 10 12 14 16
Input Torque (Nm)
HPN-32A-31
100
90
80
70
60
50
40
30
20
10
0
Efficiency (%)
0 2 4 6 8 10 12
Input Torque (Nm)
HPN-32A

8. 5. Efficiency
High Performance Gearheads for Servomotors
HPN-40A-03 HPN-40A-04 HPN-40A-05
100
90
80
70
60
50
40
30
20
10
00 50 100 150 200 250
100
80
70
60
50
40
30
20
10
00 50 100 150 200 250
100
80
70
60
50
40
30
20
10
00 50 100 150 200
Input Torque (Nm) Input Torque (Nm) Input Torque (Nm)
HPN-40A-07 HPN-40A-10 HPN-40A-13
100
80
70
60
50
40
30
20
10
00 30 60 90 120
100
80
70
60
50
40
30
20
10
00 20 40 60 80
100
80
70
60
50
40
30
20
10
0
Input Torque (Nm) Input Torque (Nm) Input Torque (Nm)
High-precision actuators can be created
with a simple installation of a servomotor
from the manufacturer of your choice!
Please speak with an application engineer
to assist in ordering the proper gear for
your motor.
100
80
70
60
50
40
30
20
10
00 10 20 30 40 50
Efficiency measurment conditions
• Input speed: 3,000 rpm
• Ambient temperature: 25℃
• Efficiency values indicated in graphs are average values.
Harmonic Drive LLC
US Headquarters
247 Lynnfield Street
Peabody, MA 01960
New York Sales Office
100 Motor Parkway
Suite 116
Hauppauge, NY 11788
100
90
80
70
60
50
40
30
20
10
0 0 10 20 30 40
Harmonic Drive and Harmonic Planetary are trademarks of Harmonic Drive LLC.
Group Companies
Harmonic Drive Systems, Inc.
6-25-3 Minami-Ohi, Shinagawa-ku
Tokyo 141-0013, Japan
Harmonic Drive AG
Hoenbergstrasse, 14, D-6555
Limburg/Lahn Germany
San Jose Sales Office
333 W. San Carlos Street
Suite 1070
San Jose, CA 95110
T: 800.921.3332
T: 978.532.1800
F: 978.532.9406
www.HarmonicDrive.net
Rev_08_13
HPN-40A
Efficiency (%)
Efficiency (%)
Efficiency (%)
Efficiency (%)
Efficiency (%)
Efficiency (%)
Efficiency (%)
Efficiency (%)
Input Torque (Nm) Input Torque (Nm)
90
90
90
90
90
90
0 20 40 60 80
HPN-40A-21 HPN-40A-31