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B34 Mounted Electric Motors
B34 mounted electric motors are industrial electric motors that have both a foot mounting and a small flange mounting. In this mounting type there are B3 type foot mountings underneath the motor body, and a B14 type small 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 directly through the front small flange to a gearbox, pump, fan body or special machine connection surface.
The B34 mounting type can be considered as the combination of a B3 foot-mounted motor and a B14 small flange motor. The motor's foot-mounted structure ensures it stands solidly on the frame, while the small flange mounting helps make a connection on the same axis as the driven equipment. Thanks to this feature, B34 mounted motors are preferred in applications that require both mechanical support and a compact flange connection.
B34 electric motors are widely used especially in small and medium-power machines. The B34 mounting type is frequently preferred in geared systems, small pumps, fans, conveyor auxiliary equipment, packaging machines, food machines, textile machines, agricultural machines, mixers, dosing systems, automation equipment and general machine manufacturing applications. Thanks to the small flange structure, the motor is connected to the machine in a compact manner, while thanks to the foot mounting, the weight of the motor is carried in a more balanced way.
What Is a B34 Mounted Electric Motor?
A B34 mounted electric motor is a foot-mounted and small flange motor type. The feet located underneath the motor allow the motor to be fixed to the ground or to the machine frame. The B14 small flange located at the front allows the motor to be connected to a gearbox, pump, fan or machine body by being directly centered.
In B14 small flange motors the motor is connected only through the flange, while in the B34 mounting type the motor is also supported by its feet. For this reason, B34 motors maintain the compact structure provided by the small flange connection while offering a more balanced and secure mounting advantage thanks to the foot mounting.
This structure provides an important advantage especially in geared applications and in machine manufacturing. Supporting the motor both from the base and connecting it to the equipment through the flange provides a sounder alignment and more reliable power transmission when the correct dimension is selected.
Where Are B34 Mounted Motors Used?
B34 mounted electric motors are used in many industrial applications where the need for a compact connection and solid fixing exist together. Thanks to its foot-mounted and small flange structure, it offers a practical solution for both machine manufacturers and maintenance-repair teams.
Their main areas of use are as follows:
- Geared systems
- Small and medium-power pumps
- Fan and ventilation systems
- Conveyor auxiliary equipment
- Packaging machines
- Food machines
- Textile machines
- Agricultural machines
- Mixer and agitator systems
- Dosing systems
- Automation equipment
- Woodworking machines
- Small compressor applications
- General machine manufacturing
- Industrial production lines
B34 motors provide an advantage especially in applications where the motor is connected to the gearbox or machine body through the small flange, but where it is also desired to support the motor body from the feet. This way the motor does not carry the load only through the flange; the foot mounting also contributes to the mechanical strength of the system.
What Should Be Considered When Selecting a B34 Mounted Motor?
When selecting a B34 mounted electric motor, the motor power and speed alone are not sufficient. Because in B34 motors both the B3 foot dimensions and the B14 small flange dimensions must be checked together. When the wrong body, wrong shaft diameter or wrong flange dimension is selected, the motor may not connect to the machine or alignment problems may occur after the connection.
Especially if a new motor will be installed in place of an existing one, the old motor's nameplate, body type and dimensions must definitely be checked. Two motors with the same kW power can be manufactured in different body dimensions. For this reason, in motor replacements, information such as "1.5 kW 1500 rpm" or "5.5 kW 3000 rpm" alone is not sufficient. The body type, shaft diameter, shaft length, flange centering diameter, connection holes and foot dimensions must definitely be known as well.
The main dimensions to be considered in B34 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 small flange connection holes.
N dimension: The diameter of the flange centering spigot.
P dimension: The outer diameter of the small flange.
S dimension: The diameter of the flange connection hole or the screw size.
K dimension: The diameter of the foot mounting hole.
Key dimension: The dimension of the keyway on the shaft, and it is important for the coupling, pulley or gearbox connection.
When the correct dimension is not selected, mounting the motor onto the machine may become difficult, the gearbox connection may be incompatible, the coupling axis may be off, or vibration may occur during operation. For this reason, technical drawing and dimension checking are of great importance in B34 mounted motor orders.
Common Dimensions in B34 Mounted Electric Motors
The table below is a general reference for B34 mounted electric motors commonly used in the Turkish market. In B34 motors, the foot dimensions are compatible with B3 mounting dimensions, and the small flange dimensions are compatible with B14 mounting dimensions. Dimensions may vary according to the manufacturer, motor series, number of poles and special design. They must definitely be checked with the motor's 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 Small Flange Hole Diameter | N Centering Diameter | P Flange Outer Diameter | S Hole / Screw |
|---|---|---|---|---|---|---|---|---|---|
| 63 | 63 mm | 100 mm | 80 mm | 11 mm | 23 mm | 75 mm | 60 mm | 90 mm | M5 |
| 71 | 71 mm | 112 mm | 90 mm | 14 mm | 30 mm | 85 mm | 70 mm | 105 mm | M6 |
| 80 | 80 mm | 125 mm | 100 mm | 19 mm | 40 mm | 100 mm | 80 mm | 120 mm | M6 |
| 90S | 90 mm | 140 mm | 100 mm | 24 mm | 50 mm | 115 mm | 95 mm | 140 mm | M8 |
| 90L | 90 mm | 140 mm | 125 mm | 24 mm | 50 mm | 115 mm | 95 mm | 140 mm | M8 |
| 100L | 100 mm | 160 mm | 140 mm | 28 mm | 60 mm | 130 mm | 110 mm | 160 mm | M8 |
| 112M | 112 mm | 190 mm | 140 mm | 28 mm | 60 mm | 130 mm | 110 mm | 160 mm | M8 |
| 132S | 132 mm | 216 mm | 140 mm | 38 mm | 80 mm | 165 mm | 130 mm | 200 mm | M10 |
| 132M | 132 mm | 216 mm | 178 mm | 38 mm | 80 mm | 165 mm | 130 mm | 200 mm | M10 |
| 160M | 160 mm | 254 mm | 210 mm | 42 mm | 110 mm | 215 mm | 180 mm | 250 mm | M12 |
| 160L | 160 mm | 254 mm | 254 mm | 42 mm | 110 mm | 215 mm | 180 mm | 250 mm | M12 |
The Difference Between B3, B14 and B34 Mounting
To better understand the B34 mounting type, it is necessary to compare it with the B3 and B14 connection types.
B3 motor: Foot-mounted motor type. There are foot mountings underneath the motor body and the motor is connected to the frame by its feet.
B14 motor: Small flange footless motor type. The motor is connected to the machine through the front small flange.
B34 motor: Foot-mounted + small flange motor type. It has both a foot mounting and a small flange mounting.
B34 mounted motors offer the solid foot mounting advantage of B3 motors and the compact small flange connection advantage of B14 motors together. For this reason, they are especially preferred in machine manufacturing, geared systems and narrow mounting spaces.
Advantages of B34 Mounted Motors
The most important advantage of B34 mounted electric motors is that they can be both fixed to the frame by their feet and connected directly to the equipment through the small flange. Thanks to this structure, while the weight of the motor is carried through the feet, the flange mounting provides centering between the motor and the equipment.
B34 motors offer a space advantage in compact machine designs. Thanks to the small flange mounting, the motor can be positioned closer to the machine. The foot mounting, on the other hand, helps the system stand more solidly. This feature is especially important in geared applications, small pumps and auxiliary machine equipment.
When the correct dimension is selected, B34 motors provide low vibration, proper alignment and efficient power transmission. Wrong dimension selection, on the other hand, can shorten bearing life and cause strain at the coupling or gearbox input. For this reason, dimension checking in B34 motors is of critical importance for safe and long-lasting operation.
Hem Motor B34 Mounted Electric Motors
As Hem Motor, we offer reliable solutions in B34 mounted electric motors to industrial enterprises, machine manufacturers and equipment producers. Our small flange and foot-mounted B34 motor options are suitable for geared systems, pumps, fans, packaging machines, conveyor auxiliary equipment, food machines, textile machines, agricultural machines and general machine manufacturing applications.
Our B34 mounted electric motors provide a long-lasting use advantage with their high efficiency, quality winding structure, reliable bearing system and durable body options. While energy savings are achieved with the motor options in the IE3 and IE4 efficiency classes, machine-compatible mounting is offered with the correct foot, flange and shaft dimensions.
As Hem Motor, we provide technical support to our customers regarding correct dimension selection in B34 foot-mounted and small flange electric motors. Before ordering, the most suitable motor selection is made by checking the motor power, speed, body type, foot dimension, flange dimension, shaft diameter, shaft length, centering diameter and key dimension.
For your B34 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.