Rockwell Automation 1325L DC Motors User Manual - Manual (Page 10)

10 DC Motors
Shaft Extension and Method Of Drive
V-belts should be within the limits of NEMA Standard MG1-14.67.a.
Frames DC180ATZ, C180ATZ, DC210ATZ are supplied with the same size
shaft for either coupled or belted drives.
Table C Multipliers for Drives other than V-belt
1 The above multiplier is intended for use with conventional single-ply flat, belts. When other than single-ply flat belts
are used, the use of a larger multiplier is recommended.
2 It is often necessary to install belts with a snug fit. However, tension should be no more than necessary to avoid
belt slap or tooth jumping.
Shaft Loads – Axial and Radial
DC motors are suitable for limited shaft load as shown in Tables D and E .
Recommended maximum thrust loads depend on the mounting position,
either horizontal or vertical. For load recommendations in excess of those
shown, contact your local Sales Office.
Table D Axial Thrust Capacity
1
1 Thrust capacity for vertical mounting includes a constant whose value is plus or minus depending on the
direction of the thrust load. The constant is plus for thrust loads acting upward against the force of gravity and
minus for loads acting downward with gravity.
Drive Multiplier
Flat Belt (See Note 1) 1.33
Timing Belt (See Note 2) 0.9
Chain Sprocket 0.7
Spur Gear 0.75
Helical Gear 0.85
!
ATTENTION: The use of these radial load capacities requires
the accurate calculation of the radial load for the application.
Radial loads for gears, sprockets, and flywheel are usually
accurately determined but the radial loads due to V-belt drives are
subject to miscalculations because they do not include all of the
pre-tension load (belt tightening). The calculations of the radial
load for a V-belt drive must include the pre-tension for
transmitting the horsepower, pre-tension for centrifugal force on
the belts, pre-tension for high start torques, rapid acceleration or
deceleration, pre-tension for drives with short arc-of-contact
between the V-belt and sheave, and low coefficient of friction
between belt and sheave caused by moisture, oil or dust. Failure
to observe these precautions could result in damage to or
destruction of the equipment.
Frame Units
Horizontal Mounting Vertical Mounting
2500 RPM 1750 1150 850 2500 1750 1150 850 RPM
DC180ATZ &
DC210ATZ lbs. 176 207 251 286 190
±
45 217
±
45 265
±
45 295
±
45
kg 80 94 114 130 86
±
20 99
±
20 120
±
20 134
±
20
C180ATZ lbs. 295 345 417 477 370
±
45 357
±
45 430
±
45 492
±
50
kg 134 156 189 216 139
±
20 162
±
20 195
±
20 223
±
20