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Overview<br />
P/PA Series Motor Mounting Plate Option (Motor information required with ME or MF Motor Adapter Option)<br />
STOBER <strong>Servo</strong> <strong>Gear</strong>heads fit the motor of<br />
your choice with the appropriate motor<br />
mounting plate assembled between the<br />
motor and the gearhead.<br />
NOTE: When ordering a gearhead:<br />
• Specify the motor manufacturer and<br />
part number<br />
• Provide the motor drawing with<br />
dimensions, or specify the motor<br />
mounting dimensions (per the list shown<br />
at right)<br />
For a precise dimension on a specific motor,<br />
or for general assistance, we recommend<br />
you contact STOBER Technical Support.<br />
Maximum 10 working days for custom<br />
motor mounting plates.<br />
Motor Mounting Plate Dimensions —<br />
mm(<strong>Gear</strong>head Part Number Specific)<br />
Customer Required Dimensions for Properly Sized Motor Mounting Plate<br />
d2<br />
b6<br />
e6<br />
s6<br />
I5<br />
f6<br />
a6<br />
P221<br />
P222<br />
P/PA322<br />
Motor Shaft Diameter (If an adapter bushing is required it will be supplied with<br />
the motor plate.)<br />
I5<br />
s6<br />
c<br />
Pilot Diameter<br />
Bolt Circle Diameter<br />
Bolt Diameter<br />
Motor Shaft Length<br />
P221...L<br />
P222...L<br />
P/PA321<br />
P322...L<br />
P/PA422<br />
P/PA321...L<br />
P/PA421<br />
P/PA422...L<br />
P/PA522<br />
P/PA421...L<br />
P/PA521<br />
P/PA522...L<br />
P/PA722<br />
P/PA521...L<br />
P/PA721<br />
P/PA722...L<br />
P/PA822<br />
d2 b6<br />
Pilot Length<br />
f6<br />
a6<br />
Square Flange<br />
e6<br />
(Optional – motor plate will typically be made to match this dimension.)<br />
P/PA721...L<br />
P/PA821<br />
P/PA822...L<br />
P922<br />
P821...L P921<br />
P922...L<br />
Maximum Allowed Motor Shaft Dia. d2 14 19 24 32 38 48 60<br />
Minimum Allowed Motor Plate Thickness c* 15 18 21 24 25 33 43<br />
* Note that c motor plate thickness is determined by the motor shaft length. The minimum motor plate thickness is the value listed.<br />
P/PA Series: INLINE — Shaft Output<br />
P/PA Series Output Shaft Options (“P” or “G” designated in part number, for example: P421S P 0160 MEL)<br />
P Shaft with Key<br />
l4<br />
l2<br />
l1<br />
d<br />
t<br />
u<br />
s2<br />
Unit<br />
d k6<br />
mm<br />
l1 l2 l4<br />
t u (2)<br />
s2 (1)<br />
mm mm mm mm W x H x L<br />
P2 12 +0.012/+0.001 2 22 36 M4 13.5 A4x4x18<br />
P/PA3 16 +0.012/+0.001 2 28 48 M5 18.0 A5x5x22<br />
P/PA4 22 +0.015/+0.002 3 36 56 M8 24.5 A6x6x28<br />
P/PA5 32 +0.018/+0.002 3 58 88 M12 35.0 A10x8x50<br />
P/PA7 40 +0.018/+0.002 4 82 112 M16 43.0 A12x8x70<br />
P/PA8 55 +0.021/+0.002 6 82 112 M20 59.0 A16x10x70<br />
P9 75 +0.021/+0.002 7 105 143 M20 79.5 A20x12x90<br />
G Shaft without Key<br />
l4<br />
l2<br />
d<br />
s3<br />
d k6<br />
l2 l4<br />
Unit<br />
mm<br />
mm mm<br />
s3 (1)<br />
P2 12 +0.012/+0.001 22 36 M4<br />
P/PA3 16 +0.012/+0.001 28 48 M5<br />
P/PA4 22 +0.015/+0.002 36 56 M8<br />
P/PA5 32 +0.018/+0.002 58 88 M12<br />
P/PA7 40 +0.018/+0.002 82 112 M16<br />
P/PA8 55 +0.021/+0.002 82 112 M20<br />
P9 75 +0.021/+0.002 105 143 M20<br />
(1)<br />
The center hole in shafts<br />
with keys (Option “P”)<br />
are machined to DIN<br />
332 T2 shape DR.<br />
(2)<br />
Feather keys are<br />
toleranced according to<br />
standard DIN 6885.<br />
800.711.3588 • www.stober.com <strong>Servo</strong> <strong>Gear</strong> <strong>Units</strong> V.28 17
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