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Parker: Stepper Motor (OS21A Series) Low cost stepper motors 23-frame A-Winding for use with 75VDC or less bus voltage drives like the OEM750 and E-DC B-Winding for use with the higher bus voltage drives like the E-AC, GT, and ZETA OS21A-DFFLY: OS2(57-51), 75V, CE, DBL, FL OS21A-DNFLY: OS2(57-51), 75V, CE, DOUBLE OS21A-DNFLY-HJ: OS2(57-51), 75V, CE, ENCDR OS21A-DNL10: OS57-51, DBL, 10FT, 75V OS21A-SFFLY: OS2(57-51), 75V, CE, SINGLE OS21A-SFL10: OS57-51, SGL, FLAT, 10FT, 75V OS21A-SNFLY: OS2(57-51), 75V, CE, SINGLE OS21A-SNL10: OS57-51, SGL, 10FT, 75V
Model No.: OS21A-DFFLY, OS21A-DNFLY, OS21A-DNFLY-HJ, OS21A-DNL10, OS21A-SFFLY, OS21A-SFL10, OS21A-SNFLY, OS21A-SNL10
Frame
Size
(mm)
|
Parameters
|
Static Torque
(oz-in)
|
Rotor inertia
oz-in2
|
Phase Inductance
Series/ Parallel
(mH)
|
Detent Torque
oz-in
|
Radial Play
(Per 0.5 lb load)
(in)
|
OEM750
Series/ Parallel
|
Motor Weight
(lb)
|
Size 23
|
OS2HA
|
49.1
|
0.39
|
1.7/NA
|
2.5
|
0.0008
|
2.65
(1.9) / 5.3 (3.7)
|
1
|
OS21A
|
114
|
0.66
|
1.8/NA
|
4.0
|
0.0008
|
3.3
(2.3) / 6.6 (4.7)
|
1.5
|
OS22A
|
186
|
1.39
|
2.8/NA
|
7.0
|
0.0008
|
3.8
(2.7) / 7.5 (5.3)
|
2.5
|
OS2HB
|
61.35
|
0.39
|
8.6/2.2
|
2.5
|
0.0008
|
NA /
NA
|
1
|
OS21B
|
126.5
|
0.66
|
12/3
|
4.0
|
0.0008
|
NA /
NA
|
1.5
|
OS22B
|
238
|
1.39
|
16.6/4.2
|
7.0
|
0.0008
|
NA /
NA
|
2.5
|
Parker Sizing and Selection
Tools
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