Stepper MotorS
FraMe SizeS FroM NeMa 11 to 34
Wide Range
of Motor
Sizes!
OMEGA offers a robust line of 2-phase biploar step motors ranging
in frame size from NEMA 11 to NEMA 34. Most of our models are
the high torque style, with holding torques up to
1845 oz-in. All motors conform to industry-standard NEMA
mounting dimensions, and are offered with a range of wellfeatured, compatible drives and indexers. With the exception of
our two smallest motors (OMHT11-013, OM5014-842), all of our
step motors are optimized for microstepping: they can achieve a
stepping resolution of up to 51,200 steps/revolution
(0.007° per step) when operated by one of our microstepping
drives. In addition, these motors can be operated in a closed-loop
system for even more precise position control when fitted with one
of our incremental encoders.
8-lead motors offer the flexibility of either series or parallel
connection. The motors should be series connected for best
torque at low speeds, and parallel connected for best torque at
higher speeds.
All models shown
smaller than actual size.
Motor Wiring
Parallel Connection (8-lead motors):
Drive A+ = Orange + Black/White
Drive A- = Black + Orange/White
Drive B+ = Red + Yellow/White
Drive B- = Yellow + Red/White
Series Connection (8-lead motors):
Drive A+ = Orange
Drive A- = Black
Drive B+ = Red
Drive B- = Yellow
Connect Orange/White to Black/White (not connected to drive)
Connect Red/White to Yellow/White (not connected to drive)
(4-lead motors):
Drive A+ = Red
Drive A- = Blue
Drive B+ = Yellow
Drive B- = White
D-1
MOTION INSTALLATION TIPS
l Mount the motor securely
against a surface with good
thermal conductivity such as
steel or aluminum
l Properly align the motor
with the load using a
flexible coupling
l Protect the motor shaft from
excessive thrust, overhang and
shock loads
DESIGN TIPS
l Series connect lead wires for
best torque at low speeds
l Center tap to end or parallel
connect lead wires for best
torque at higher speeds
l Keep motor case temperature
below 100°C. This can be
achieved by lowering the motor
current or limiting the duty cycle
l Allow sufficient time to
accelerate load
l Size motor with 100% safety
factor for required torque
@ speed
l Do not disassemble motors.
A significant reduction in motor
performance will result
l Do not disconnect motor from
drive while in operation
l Do not use holding torque/
detent torque of motor as
fail-safe brake
Length: L
075: 47 ± 1 (1.85 ± 0.04)
275: 47 ± 1 (1.85 ± 0.04)
278: 62.5 ± 1 (2.46 ± 0.04)
10 ±1 (0.394 ±0.04)
2X #4-40 UNC
ON A Ø19.05 (0.750)
BOLT CIRCLE
0.3 m (1') MIN
2 x #2-56 UNC
ON Ø0.75 BCD
OMHT11-013
2X 28 ±0.3
(2X 1.10 ±0.012)
15 ±1 (0.591 ±0.04)
47.5 ±1
(1.87 ±0.04)
FLAT
4.5 ±0.15 (0.177)
1.5 ±0.2
(0.06 ±0.008)
Ø5.000 (Ø0.1968)
+ 0
Ø22.00
()
-0.03
L
15 ±0.25 (0.59 ±0.01) TYP
Ø22.00
20 ±0.5
(0.787 ±0.02)
+ 0
-0.012
+ 0
Ø0.866
-0.001
2 ±0.5 (0.08 ±0.02)
20 ±0.5 (0.79 ±0.02)
Ø5.000
(Ø0.1968)
FLAT
4.5 ±0.15 (0.177)
+ 0
Ø0.866
()
-0.03
+0.0000
- 0.0004
+ 0
-0.001
4X M2.6 X 0.45
3.0 min deep
2 x 42 (1.65)
MOUNTING
200 (7.87) min
2X 11.50 (0.453)
END
2X 23 ±0.2
(2X 0.906 ±0.01)
4 x #4-40 UNC
4.3 (0.17) min deep
OMHT17-075/275
2 x 31 (1.220)
Dimensions: mm (inch)
Ø = diameter
OM5014-842
2X 35 (1.38)
2X #2-56
ON A Ø0.75 B.C.
10
(0.39)
2X 7.11
40 (1.575) max
+ 0
-1.52
+ 0
2X 0.28
()
-0.06
1.5 ±0.1
(0.06 ±0.004)
Ø22.00
D-2
14 (0.559) ±0.014
2 X Ø5.000
(0.1968)
+ 0
Ø0.866
()
-0.03
+0.000
- 0.004
+ 0
-0.001
2X #4-40
STUDS
305 (12) min
2X 26 (1.024)
470±10
Ø2.875 ±0.002
“ L”
8
(0.330)
2
(0.062)
32 (1.25)
±0.02
2X 69.6 ±0.3
(2.74 ±0.01)
4X Ø5.50
(Ø0.218)
THRU
Ø0.3750
29 (1.12)
±0.04
Shaft
D
86 ±0.5
(3.38 ±0.02)
5 (0.2) DEEP ON
A Ø1.28 (32.5) B.C.
2X 2-56 UNC
2X #4-40 UNCTAP 5(.2)
DEEP 180°
APARTONAØ46.02
(1.812) B.C.
Shaft: D
HT34-485 0.5
HT34-486 0.5
HT34-487 0.625
Length: L
485: 79 ±1 (3.11 ±0.04)
486: 117.5 ±1 (4.626 ±0.04)
487: 156 ±1 (6.14 ±0.04)
Ø2.875 ±0.002
“ L”
8
(0.330)
2
(0.062)
32 (1.25)
±0.02
2X 69.6 ±0.3
(2.74 ±0.01)
4X Ø5.50
(Ø0.218)
THRU
Ø0.3750
29 (1.12)
±0.04
Shaft
D
86 ±0.5
5 (0.2) DEEP ON
A Ø1.28 (32.5) B.C.
2X 2-56 UNC
2X #4-40 UNCTAP 5(.2)
DEEP 180°
APARTONAØ46.02
(1.812) B.C.
Shaft: D
HT34-485 0.5
HT34-486 0.5
HT34-487 0.625
Ø73.02 ±0.05
(Ø2.875 ±0.002)
“L”
8.5 (0.330)
1.52 (0.062)
31.75 ±0.5
(1.25 ±0.02)
69.6 ±0.3
(2.74 ±0.01)
4X Ø5.50
(0.218) THRU
Ø 0.3750
28.5 ±1 (1.12 ±0.04)
Shaft
D
3 m (10') min
86 ±0.5
(3.38 ±0.02)
5 (0.2) DEEP ON
A Ø1.28 (32.5) B.C.
2X 2-56 UNC
2X #4-40 UNC TAP 5 (0.2) DEEP 180°
APART ON A Ø46.02 (1.812) B.C.
9
2X #4–40 UNC
TAP Thru EQ.SP.
ON A Ø10.05 B.C.
9
#4–40 UNC
TAP THRU
457 (18) min
5.8 ±0.15
(0.228
±0.006)
5–10
21.50
(0.85)
2 x 56.4 (2.22)
2 x 28.2
(1.11)
9
5.8
(0.23)
4X R4.6
15 ±0.25 (0.59 ±0.01)
±0.1
Dimensions: mm (inch)
Ø = diameter
+0
Ø6.35
-0.013
+0.000
Ø.250
( )
- 0.001
2 x #4-40 UNC
ON Ø1.82 BCD
2 x #4-40 UNC
ON Ø0.75 BCD
9
9
9
2X #2–56 UNC
TAP THRU EQ.SP.
ON A Ø32.5 B.C.
OMHT23-393/397/400
“L”
16 ±1 (0.63 ±0.04)
Notes -
1) Drawing shown with optional rear shaft.
2) Encoder holes only on dual shaft version.
“L”
9
15 ±0.2
0.5 X 45º
±0
Ø6.35–0.013
9
16 ±1
5 (0.197)
1.6 ±0.2
(0.063 ±0.008)
LABEL
A0.10
0.05
3 m (10') MIN
(Ø1.50 ±0.001)
15 ±0.25 (0.59 ±0.01)
Ø6.35
Ø0.250
( )
20 ±0.5 (0.787 ±0.02)
4.8±0.3
1.6±0.2
15 ±0.2
20 ±0.5
Ø38.1 ±0.03
+0
-0.013
+0.000
-0.001
-A-
ø6.35–0.013
0.5 X 45º
Ø0.250
5.8 ±0.15 (0.228 ±0.006)
0.05
ø38.1±0.05
0
+0.000
- 0.001
15 (0.59) ±0.001
4X Ø5.2 ±0.25
(4X 0.205 ±0.01)
2X 23.57
(0.928)
2X 47.14 (1.856)
OMHT23-593/597/600/603
A
5.8 ±0.1
2X 56.4 MAX
2X 28.2
77.47
(3.05)
4X ø5.1
±0.2
–0
2X 23.57
2X 47.14±0.20
5 (0.197)
1.6 (0.063)
15 ±0.25
(0.591
±0.01)
Length: L
393: 39 ± 1 (1.535 ± 0.04)
397: 54 ± 1 (2.126 ± 0.04)
400: 76 ± 1 (2.99 ± 0.04)
Length: L
593: 41 ± 1 (1.61 ± 0.04)
597: 54 ± 1 (2.13 ± 0.04)
600: 76 ± 1 (2.99 ± 0.04)
603: 111 ± 1 (4.37 ± 0.04)
OMHT23-550
Ø1.50 ±0.001
4 x Ø0.205 ±0.01
+0.000
Ø0.250
- 0.001
2 x 47.14
(1.856)
OMHT34-485/486/487
Length: L
488: 79 (3.11)
490: 155.9 (6.14)
Shaft: D
12.7 (0.5)
15.875 (0.625)
2 x 56.4 (2.22)
3 m (10') min
D-3
28.2
(1.11)
2X 2-56 UNC
5 (0.2) DEEP ON
A Ø1.28 (32.5) B.C.
86 ±0.5
(3.38 ±0.02)
0.630 ±0.039
2 x #4-40 UNC
ON Ø1.82 BCD
2X 2-56 UNC TAP
THRU 180° APART
ON A Ø19.05 B.C.
Length: L
485: 79 ±1 (3.11 ±0.04)
486: 117.5 ±1 (4.626 ±0.04)
487: 156 ±1 (6.14 ±0.04)
28.5 ±1 (1.12 ±0.04)
Ø 0.3750
2X #4-40 UNC TAP 5 (0.2) DEEP 180°
APART ON A Ø46.02 (1.812) B.C.
6 (0.228) ±0.006
FLAT
20.6 ±0.5
(0.811 ±0.02)
Notes -
1) Drawing shown with optional rear shaft.
2) Encoder holes only on dual shaft version.
24 (0.928)
OMHT34-488/490
“L”
31.75 ±0.5
(1.25 ±0.02)
8.5 (0.330)
1.52 (0.062)
Shaft
D
Ø73.02 ±0.05
(Ø2.875 ±0.002)
69.6 ±0.3
(2.74 ±0.01)
4X Ø5.50
(0.218) THRU