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  5. Mechanical specifications for electric motors

Mechanical specifications for electric motors

Per CEI EN 60034-9 »

 

Available configurations »

Bearings »

 

Axial Loads »

Radial Loads »

 

 

Rotors
These are die-cast aluminum or Silumin alloy (Al-Si) squirrel-cage rotors.

Shafts (per CEI-IEC 72-1)
Made of standard C40/C43 steel (UNI 8373-7847).
They may be made of stainless steel for use with foodstuffs, or steel alloys, with standardized CEI IEC 72-1 dimensions or according to customer drawings.
The motor with double extension shaft, is only on request (with price list surcharge).

Tangs
These are made of C40 steel with dimensions standardized per CEI IEC 72-1.

Frame (per CEI-IEC 72-1)
Die-cast aluminum with high mechanical capacity, good thermal conductivity, and very lightweight.
Frames are available in a version with standard tie-rods, with studs upon request.

Motor terminal board
For the B3 frame with feet, added in the terminal box, the terminal board is placed on top in standard production, or may be placed on the right or left side upon request.

Flanges and shields (per CEI-IEC 72-1)
These are made of die-cast aluminum alloy, with standard dimensions per CEI-IEC 72-1 or based on customer drawings, reduced or enlarged.
For sizes 160 - 180 - 200, flanges B5 and B14 are in cast iron.
Caution: In flanges B14, seal the fixing holes not used; do not use very long screws or you may cause serious electrical hazards.

Cooling (per IEC 34-6 and CEI EN 60034-6)
Obtained by means of a two-way rotary fan with radial blades keyed onto the motor shaft IC 411.
Made of Latarnid 6, it has a high operating temperature of 100 °C.
For applications with electronic controls such as inverters, assisted power cooling is available via an auxiliary cooling-type motor IC416, also in kit form.

Fan cover
Made of galvanised sheet metal, also available in plastic upon request for aggressive environments (MEC50 as standard).

Noise level (CEI EN 60034-9)
Sound pressure and power levels were measured on three-phase motors, one meter away from the machine, and weighted according to curve A (ISO R 1680). At 50 Hz for relative values at 60 Hz, this increases by an average of 4 dbA.

Vibration grade
Grade A (standard); others (B) upon request (CEI IEC 60034-14).

 

Per CEI EN 60034-9

Ventilation IC411 - Protection IP55
A-Sound pressure (LpA) - A-Sound power (LwA)

Motor size

2 poles

4 poles

6 poles

8 poles
LpA [dB] LwA [dB] LpA [dB] LwA [dB] LpA [dB] LwA [dB] LpA [dB] LwA [dB]
50 59 69 55 65 50 60 47 57
56 60 70 56 66 51 61 48 58
63 62 72 58 68 53 63 50 60
71 64 74 59 69 55 65 52 62
80 68 78 61 71 58 68 55 65
90 70 80 63 73 60 70 58 68
100 74 84 65 75 62 72 60 70
112 76 86 66 76 62 72 60 70
132 77 87 66 76 62 72 60 70
160 78 88 66 76 62 72 60 70
180 90 100 84 94 76 86 72 82
200 92 102 84 94 76 86 76 86

Indicative non binding values

 

Available configurations (to specify when ordering)
Table shows the available motor configurations and installation positions per IEC 34-7.
Versions B3, B5, B14.
In general from MEC 71 to 200 reported feet, for specific requests contact the Commercial Dpt; from 100 to 200 it is reported in motor configuration.

 

IP ratings and housings
IP55 standard protection rating of the motors.
Special executions are possible for harsh environments with greater or specific protection except for other indications on motor rating plate.

 

Bearings
Front and rear ZZ radial ball bearings (sealed 2RS upon request), with two metal shields, prelubricated with lithium grease, with a temperature range from -10 °C to +110 °C.
Waterproof front bearings, C3 bearings with increased clearance, or bearings with special grease (-30°C to +140°C)/synthetic grease may be applied.
All are pre-loaded with corrugated tempered steel rings to eliminate residual clearance from the bearing.
Axially-free bearings; locked or with grease nipple upon request.

 

Size
50
56
63
71
80
90
100
112
132
160
180
200
200-B5

Front

6000-ZZ

6201-ZZ

6202-ZZ

6203-ZZ

6204-ZZ

6205-ZZ

6206-ZZ

6206-ZZ

6308-ZZ

6309-ZZ

6310-ZZ

6310-ZZ

6312-ZZ

Back

6000-ZZ

6201-ZZ

6202-ZZ

6203-ZZ

6204-ZZ

6205-ZZ

6206-ZZ

6206-ZZ

6308-ZZ

6309-ZZ

6310-ZZ

6310-ZZ

6310-ZZ

 

Axial Loads
The table below shows the maximum applicable axial loads [N] at 50 Hz, calculated for a running life of:

  • 20,000 hours* for 2-pole motors
  • 40,000 hours* for 4-6-8-10-12 pole motors

Reduce values by approximately 6% for 60-Hz motors
* To be intended as indicative and not guaranteed

 

Size
Horizontally-mounted motors
Vertically-mounted motors

 

 

Speed (min -1)

Speed (min -1)

 

 750 1000 1500 3000 750 1000 1500 3000 750 1000 1500 3000 750 1000 1500 3000
50 - - 120 100 - - 120 100 - - 100 80 - - 110 90
56 230 200 160 120 230 200 160 120 220 160 120 100 230 170 130 110
63 320 300 250 200 320 300 250 200 300 290 240 190 320 310 260 210
71 380 360 300 240 380 360 300 240 365 345 285 230 395 375 315 250
80 480 430 370 300 880 730 600 600 450 400 340 280 510 460 400 320
90 650 600 510 400 950 900 810 800 600 550 470 360 700 650 550 440
100 850 750 580 500 1150 1050 1000 1000 770 670 500 430 930 830 660 570
112 1300 1250 950 700 1150 1050 1000 1000 1200 1150 850 620 1100 1000 850 680
132 1800 1700 1350 800 2000 1800 1400 1400 1600 1500 1150 650 1500 1300 1100 850
160 2300 2000 1600 1400 2800 2500 2200 2200 2000 1700 1400 1300 2000 2000 2000 1500
180 2600 2300 -1800 1600 3300 3000 2500 2500 2200 1900 1500 1400 3000 3000 3000 2500
200 3400 3000 2400 2400 4200 3800 3200 3200 2800 2500 2000 2000 4000 4000 3800 3500

 

Radial Loads
These diagrams make it possible to determine the maximum applicable loads [N] based on measurement X, calculated for a bearing running life of:

  • 20,000 hours* for 2-pole motors
  • 40,000 hours* for 4-6-8-10-12-16-32 pole motors.

* To be intended as indicative and not guaranteed

 

 

Radial load when using pulleys and belts
If the motor is coupled by belts, make sure the radial load on the shaft does not exceed the maximum allowed values.

This may be checked using the following formula where:

F = radial load in N
P = power in kW
n = motor rpm in 1st
D = pulley diameter in meters
K = - 2 flat pulleys with belt stretcher roller
       - 2.25 for trapezoid groove pulleys
       - 2.25 ÷ 3 for heavy duty and other pulleys