B35 Mounted Electric Motors
B35 mounted electric motors are industrial electric motors that have both a foot mounting and a large flange mounting. In this mounting type there are B3 type foot mountings underneath the motor body, and a B5 type large flange is located at the front of the motor. This way the motor can be fixed to the machine frame by its feet, and it can also be connected through the front flange to a gearbox, pump, fan, compressor or special machine body.

The B35 mounting type is frequently preferred because it offers versatile usage advantages in industry. Thanks to both foot mounting and flange mounting options, it helps the motor to be connected to the machine in a more solid, balanced and secure manner. Especially in applications where high power is transmitted, supporting the motor not only through the flange but also through its feet increases mechanical strength and helps reduce vibrations that may occur during operation.
What Is a B35 Mounted Electric Motor?
A B35 mounted electric motor can be considered as the combination of a B3 foot-mounted motor and a B5 large flange motor. There are feet underneath the motor and a large flange on the front cover section. Thanks to this structure, the motor can adapt to different machine connections.
B35 motors are generally used in applications where the motor needs to both rest on the frame and be connected to the equipment through the flange. This connection type is especially preferred in geared systems, large pumps, fans, crushers, conveyor systems, concrete batching plants, mixers, compressors and heavy industrial machinery.
Correct dimension selection is very important in B35 mounted motors. Because in these motors both the foot mounting dimensions and the flange dimensions must be compatible with the machine. Making a selection based only on motor power and speed is not correct. The existing motor's body type, shaft diameter, shaft length, foot hole spacing, flange diameter, centering diameter and connection holes must definitely be checked.
Where Are B35 Mounted Motors Used?
B35 foot-mounted and large flange electric motors are used in many industrial applications where mechanical strength and correct alignment are important. They are an ideal solution especially in systems where the motor needs to be both supported from the base and connected to the machine through the flange.
Their main areas of use are as follows:
- Geared systems
- Pump applications
- Fan and ventilation systems
- Compressors
- Conveyor belt systems
- Crusher and screening machines
- Concrete batching plants
- Mixer and agitator systems
- Agricultural machinery
- Packaging machines
- Textile machines
- Woodworking machines
- General machine manufacturing
- Heavy industrial applications
B35 mounted motors provide an advantage especially in applications that require high torque and where the motor needs to be fixed more solidly in mechanical terms. While the foot mounting carries the weight of the motor, the flange mounting helps the motor work on the same axis as the equipment.
What Should Be Considered When Selecting a B35 Mounted Motor?
When selecting a B35 mounted electric motor, both the B3 foot dimensions and the B5 flange dimensions must be checked together. When the wrong body or wrong flange dimension is selected, the motor may not fit the machine, the connection holes may not match, or the motor shaft may not be on the same axis as the equipment shaft.
The main dimensions to be considered in B35 mounted motors are as follows:
H dimension: The height of the motor shaft center from the foot base.
A dimension: The lateral distance between the foot mounting holes.
B dimension: The longitudinal distance between the foot mounting holes.
D dimension: The motor shaft diameter.
E dimension: The motor shaft extension length.
M dimension: The center diameter of the flange connection holes.
N dimension: The diameter of the flange centering spigot.
P dimension: The outer diameter of the flange.
S dimension: The diameter of the flange connection hole.
K dimension: The diameter of the foot mounting hole.
Key dimension: The dimension of the keyway on the shaft.
During B35 motor replacements, the old motor's nameplate, body type and dimensions must be carefully checked. Two motors with the same kW power can be manufactured in different body dimensions. For this reason, especially in applications where a coupling, gearbox, pump or fan connection will be made, the shaft diameter, shaft length, flange center and foot dimensions must definitely be verified before ordering.
Common Dimensions in B35 Mounted Electric Motors
The table below is a general reference for B35 mounted electric motors commonly used in the Turkish market. Dimensions may vary according to the manufacturer, motor series, number of poles and special design. They must definitely be checked with a technical drawing or catalog dimension before ordering.
| Body Type | H Shaft Height | A Foot Width | B Foot Length | D Shaft Diameter | E Shaft Length | M Flange Hole Diameter | N Centering Diameter | P Flange Outer Diameter |
|---|---|---|---|---|---|---|---|---|
| 63 | 63 mm | 100 mm | 80 mm | 11 mm | 23 mm | 115 mm | 95 mm | 140 mm |
| 71 | 71 mm | 112 mm | 90 mm | 14 mm | 30 mm | 130 mm | 110 mm | 160 mm |
| 80 | 80 mm | 125 mm | 100 mm | 19 mm | 40 mm | 165 mm | 130 mm | 200 mm |
| 90S | 90 mm | 140 mm | 100 mm | 24 mm | 50 mm | 165 mm | 130 mm | 200 mm |
| 90L | 90 mm | 140 mm | 125 mm | 24 mm | 50 mm | 165 mm | 130 mm | 200 mm |
| 100L | 100 mm | 160 mm | 140 mm | 28 mm | 60 mm | 215 mm | 180 mm | 250 mm |
| 112M | 112 mm | 190 mm | 140 mm | 28 mm | 60 mm | 215 mm | 180 mm | 250 mm |
| 132S | 132 mm | 216 mm | 140 mm | 38 mm | 80 mm | 265 mm | 230 mm | 300 mm |
| 132M | 132 mm | 216 mm | 178 mm | 38 mm | 80 mm | 265 mm | 230 mm | 300 mm |
| 160M | 160 mm | 254 mm | 210 mm | 42 mm | 110 mm | 300 mm | 250 mm | 350 mm |
| 160L | 160 mm | 254 mm | 254 mm | 42 mm | 110 mm | 300 mm | 250 mm | 350 mm |
| 180M | 180 mm | 279 mm | 241 mm | 48 mm | 110 mm | 300 mm | 250 mm | 350 mm |
| 180L | 180 mm | 279 mm | 279 mm | 48 mm | 110 mm | 300 mm | 250 mm | 350 mm |
| 200M | 200 mm | 318 mm | 267 mm | 55 mm | 110 mm | 400 mm | 350 mm | 450 mm |
| 200L | 200 mm | 318 mm | 305 mm | 55 mm | 110 mm | 400 mm | 350 mm | 450 mm |
| 225S | 225 mm | 356 mm | 286 mm | 60 mm | 140 mm | 400 mm | 350 mm | 450 mm |
| 225M | 225 mm | 356 mm | 311 mm | 60 mm | 140 mm | 400 mm | 350 mm | 450 mm |
| 250M | 250 mm | 406 mm | 349 mm | 65 mm | 140 mm | 500 mm | 450 mm | 550 mm |
| 280S | 280 mm | 457 mm | 368 mm | 75 mm | 140 mm | 500 mm | 450 mm | 550 mm |
| 280M | 280 mm | 457 mm | 419 mm | 75 mm | 140 mm | 500 mm | 450 mm | 550 mm |
| 315S | 315 mm | 508 mm | 406 mm | 85 mm | 170 mm | 600 mm | 550 mm | 660 mm |
| 315M | 315 mm | 508 mm | 457 mm | 85 mm | 170 mm | 600 mm | 550 mm | 660 mm |
| 315L | 315 mm | 508 mm | 508 mm | 85 mm | 170 mm | 600 mm | 550 mm | 660 mm |
| 315HT | 315 mm | Varies by manufacturer | Varies by manufacturer | 100 mm | around 210 mm | around 740 mm | around 680 mm | around 800 mm |
| 355M | 355 mm | 610 mm | around 560 mm | 100 mm | around 210 mm | 740 mm | 680 mm | 800 mm |
| 355L | 355 mm | 610 mm | around 630 mm | 100 mm | around 210 mm | 740 mm | 680 mm | 800 mm |
Dimensions Suitable for the Turkish Market in High-Power B35 Motors
In high-power electric motors, dimension selection becomes more critical compared to small and medium-power motors. In the Turkish market, especially in 315 kW and 355 kW 1500 rpm B35 mounted electric motors, a 355 body and a Ø100 mm shaft diameter are commonly used.
For this reason, in 315 kW or 355 kW motor replacements, power and speed information alone is not sufficient. The existing motor's body type, foot mounting spacing, shaft diameter, shaft length, key dimension, flange diameter and centering dimension must definitely be checked.
The high-power B35 motor dimensions frequently encountered in the Turkish market are generally as follows:
| Power | Speed | Common Body | Shaft Diameter Common in Turkey | Mounting Type |
| 250 kW | 1500 rpm | 315HT / 355 body | Ø100 mm | B35 |
| 315 kW | 1500 rpm | 355M | Ø100 mm | B35 |
| 355 kW | 1500 rpm | 355M / 355L | Ø100 mm | B35 |
| 400 kW | 1500 rpm | 355L | Ø100 mm | B35 |
Advantages of B35 Mounted Motors
B35 mounted electric motors offer both the foot mounting and the flange mounting advantage in the same body. While the foot mounting ensures the motor is solidly carried on the frame, the large flange mounting helps the motor work on the same axis as the equipment.
Thanks to this structure, the motor's mechanical strength increases, alignment is done more soundly, and vibrations that may occur during operation can be reduced. Especially in high-power motors, supporting the motor with a foot mounting instead of carrying the load only through the flange contributes to safer operation of the system.
B35 motors are also advantageous in terms of maintenance and replacement. Depending on the machine design, since the motor is fixed both by its feet and by its flange, connection safety becomes higher during operation. When the correct dimension is selected, bearing life, coupling life and overall system efficiency are positively affected.
The Difference Between B3, B5 and B35 Mounting
B3, B5 and B35 mounting types are among the most commonly used connection types in electric motors.
B3 motor: Foot-mounted motor type. It is connected to the frame through the feet underneath the motor body.
B5 motor: Large flange footless motor type. The motor is connected to the machine through the front flange.
B35 motor: Foot-mounted + large flange motor type. It has both a foot mounting and a large flange mounting.
The B35 mounting type is especially preferred in heavy-duty applications because it offers the advantages of both B3 and B5 connections together.
Hem Motor B35 Mounted Electric Motors
As Hem Motor, we offer industrial enterprises strong, efficient and long-lasting solutions in B35 mounted electric motors. With a wide range of power options from 0.55 kW to 355 kW, we provide B35 mounted motor options suitable for fan, pump, compressor, gearbox, conveyor, crusher, screen, concrete batching plant, mixer and machine manufacturing applications.
Our B35 foot-mounted and large flange electric motors stand out with their advantages of high efficiency, strong body structure, 100% copper winding, quality bearing use and design suitable for heavy operating conditions. Thanks to the motor options in the IE3 and IE4 efficiency classes, energy savings are achieved, while long-lasting and reliable operation is obtained thanks to the strong mechanical structure.
Selecting the correct body, shaft and flange dimension is especially important in high-power motors. As Hem Motor, in high-power B35 mounted electric motors such as 315 kW, 355 kW and 400 kW, we offer solutions in body, flange and shaft dimensions suitable for Turkish industrial applications. By carrying out a technical dimension check before ordering, we support our customers in selecting the correct motor.
For your B35 mounted electric motor needs, Hem Motor is your reliable solution partner with the advantage of wide stock, a suitable price policy and fast delivery support.
