High Quality Aluminum Alloy Flexible Shaft Coupling BC3-ISeries

Quick Details
Place of Origin:
Zhejiang, China
Brand Name:
Model Number:
Standard or Nonstandard:
Jaw / Spider
Flexible or Rigid:
Color:Light Grey:
Supply Ability
Supply Ability:
1000 Piece/Pieces per Week

Packaging & Delivery
Packaging Details

<dd class="do-entry-item-val" title="1 Piece/Plastic Bag,
1 Piece/Inner Box,
N Inner boxes/Ctn box

High Quality Aluminum Alloy Flexible Shaft Coupling

BC3-I Series

Setscrew Type

Features: ·

· One-piece metallic spring coupling· For little torque shaft connect· Zero backlash· Absorption of parallel, angular misalignments and shaft end-play by spring action· Identical clockwise and anticlockwise rotational characteristics· Setscrew type· Material: Aluminum alloy

Order Information:

Example: BC3-12-4-5BC3: Series No.12: Outer Diamater 12mm Setscrew type4: D1 Bore 4mm5: D2 Bore 5mm


Model InnerDia OuterDia. Length L1 Thread WrenchTorque Min.(Ød1/Ød2) Max.(Ød1/Ød2) ØD L M (N.m) BC3-12-d1-d2 3 5 12 18.5 2.5 M2.5 0.5 BC3-16-d1-d2 3 6.35 16 23.3 3.0 M3 0.7 BC3-20-d1-d2 4 8 20 26 3.0 M3 0.7 BC3-25-d1-d2 5 12 25 31 4.0 M4 1.7 BC3-32-d1-d2 8 16 32 41 6.0 M4 1.7 BC3-40-d1-d2 10 18 40 56 8.5 M5 4.0 BC3-50-d1-d2 12 20 50 71 10.5 M6 4.0 BC3-63-d1-d2 14 24 63 90 13.0 M8 15.0

Please contact us if you need specific dimensions.The dimension can be customized made according to customer’s requirements.

Product Details of Shaft Coupling:

Packing Details of Shaft Coupling:

Spare Parts of Shaft Coupling:

Raw Material of Shaft Coupling:

Manufacture Process of Shaft Coupling:

What’s Coupling?

Coupling is the mechanical drive which is mainly used for connecting shaft and shaft (sometimes coupling spindle other rotary parts) with the transfer motion and torque, and also it is the commonly used components used for safety devices. Mechanical running can’t be separated from two axis; Only be separated in the mechanical parking and coupling apart from two axis.

In addition, coupling is able to complement the axial direction, angular and shaft end-play and absorb vibration, thus it can prolong mechanical life, improve the operation quality and stability of the machine.

Installation Caution

l It must be calibrated and adjusted when installing the coupling.




l Misalignments are sometimes caused not only by equipment assembly, but also by vibration, heat expansion, wear of bearings, etc, during operation. Therefore, it is recommended to adjust the shaft misalignment to be below 1/3 of maximum values.

l The allowable axis deviation of coupling contains the following three types:

Calculate Motor Torque

When we know the motor watt, we can calculate the motor torque using the following formula.

Motor torque T(N. m)=kW×9550 rpm

Calculate Coupling Torque

When calculate the motor rated torque and select the adjustment factor, the coupling torque can calculate using the following formula.


T1: Motor rated torque K1: Operating Coefficient by Load Character

K2: Corrected Coefficient by Operating Hours

K3: Corrected Coefficient by Start and Braking

Load Character K1



Small Fluctuations


Medium Fluctuations


Large Fluctuations


Operating Hours Factor K2


2 Hour


4 Hour


8 Hour


16 Hour


24 Hour


Start and Braking Frequency Coefficient K3


10 times


30 times


60 times


120 times


240 times


Main Couplings Attachment Type:

Setscrew type: Two setscrews have a angle of 90 °, this low-cost type features the most conventional attachment. However, the point of setscrew may cause damage to the shaft and may be difficult to remove.

Clamp Type: This type is clamped on the shaft by tightening the socket head cap screws. Attachment and removal is easy, and no shaft damage results.

As one of leading jaw coupling manufacturers, suppliers and exporters of mechanical products, We offer jaw coupling and many other products.

Please contact us for details.

Mail:[email protected]

Manufacturer supplier exporter of jaw coupling

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