GC Aluminum Bellows Shaft Coupling

Product Details

The GC coupling is cut from high-strength aluminum alloy and receives an anodized finish. Because the flexible section and both hubs form one component, there are no loose discs, rubber spiders or pins inside the transmission path.

 

Each hub closes around its shaft when the fastening screw is tightened. This clamping action is useful where a set screw mark on the shaft is undesirable or where the coupling may need to be removed during maintenance.

 

Movement is accommodated through controlled deformation of the center grooves. The catalog gives the same displacement limits across the range: 0.15 mm eccentricity, 3 degrees angular displacement and ±0.2 mm axial movement.

 

Product Description

Model selection starts with the two bores. After confirming that both shaft diameters are available in the required frame, compare the coupling's rated torque and maximum speed with the actual drive conditions.

 

The short GC25×25 and GC32×32 versions can be used where axial space is restricted. GC25×32 and GC32×41 provide longer bodies at the same outside diameter. These pairs should not be chosen by diameter alone because their length, stiffness and weight differ.

 

A coupling should not run continuously at its displacement limit. Visible shaft offset should be corrected during assembly, leaving the flexible section to deal with smaller errors caused by installation tolerance, temperature change or operating load.

 

Product Information

Model	Body Size mm	Torque N·m	Speed Limit rpm	Weight g
GC12×18.5	12 × 18.5	0.3	11000	4
GC16×23	16 × 23	0.5	9500	8.1
GC19×23	19 × 23	0.9	7700	12
GC25×25	25 × 25	2	6100	23
GC25×32	25 × 32	2	6100	32
GC28.5×38	28.5 × 38	3	5500	47
GC32×32	32 × 32	4	5000	55
GC32×41	32 × 41	4	5000	86
GC38×41	38 × 41	6.5	4500	118
GC40×50	40 × 50	8	3800	125
GC42×50	42 × 50	8	3200	165
GC50×50	50 × 50	20	3200	220

 

Common catalog limits: 0.15 mm eccentricity, 3° angular displacement and ±0.2 mm axial movement. Bore availability depends on the selected body size.

 

FAQ

Which information is needed to select a GC coupling?

Provide the diameter of both shafts, required torque, maximum rotational speed and available installation length.

Are GC25×25 and GC25×32 interchangeable?

Not automatically. They share a 25 mm outside diameter, but their body lengths, stiffness and weights are different.

Is an elastic insert used inside the coupling?

No. Flexibility comes from the machined center section of the aluminum body.

Can it operate with permanent shaft offset?

Only within the published limits, but continuous operation near those limits is not recommended. Correcting the alignment during installation will reduce fatigue in the flexible section.

Can non-standard bore combinations be produced?

We build to customer drawings under OEM/ODM, and accept orders as small as a single piece for standard sizes.

 

About Us

Lishui Guangyuan Industry & Trade Co Ltd supplies couplings for motor, encoder and automation assemblies. Orders can be reviewed using the customer's shaft dimensions and operating data before the bore combination is confirmed.

 

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