Gear Shafts

Vigor produces high-accuracy gear shafts for Gear Reducer, Electric Motor & Brake Motor. Inspecting by both CMM and the full set of the specialized gauges for dimension linear tolerance and geometrical tolerance.

Gear shaft can be described as an important part within the complete transmission that bears the torsion as well as the shear stress. 

The gearbox or transmission is essentially a system whose application can be done for monitoring the energy application through increasing or reducing the speed, reversing rotation, varying the direction of the drive shaft, or increasing torque. 

Every gearbox has an input side as well as an output side. Energy is carried by the output shaft to the input shaft which operates at varying speeds based on the gear ratio and the gear itself. 

The input shaft is again directly attached to the motor thereby controlling the speed of the motor. It tolerates the produced torque through engaged gears and also facilitates the bringing of the controller within the gearbox network.

Technical Parameter

Gear Shafts Display

Gear Shaft Details Display

What is a Shaft?

A shaft is normally described as a machine element that rotates. The device is mostly circular in the cross-sectional region. This is utilized for transmitting power from a specific part to another specific part. This can be also be stated as transmitting power from power-producing machinery to power absorbing machinery.

Shafts are considered an important element within machines. They mostly use the machine’s rotating parts such as pulleys and gears. Further, they are supported by the rigid machine housing’s bearing resting. The shafts help in transmitting power from a particular member that is rotating to another that is either in connection with it or is supported by it. Hence, as a result of bending moment as well as transmission of power due to the members’ reaction which they support, a torque is experienced by them.

What do you mean by Gear?

Gear is generally described as a component shaped in the form of a roller or cylindrical toothed in nature that meshes with a completely separate cylindrical toothed  for transmitting power from a specific shaft to another specific shaft. It is mostly utilized for obtaining various speeds and torque ratios or altering the direction of the driven shaft and driving shaft.

There are different types of power transmission devices such as rope drive, chain drive, belt drive, etc. However, the core advantage of the systems of gear is that it has no or almost negligible slippage between driven as well as driving members. Most of the time a gear is used when a short distance can be noticed between the driven shaft as well as the axis driving such as a car or motorcycle. In this context, the gear shaft is important. A gear shaft along with curves of gearing at each part is introduced via an intersecting gear shaft. Gear such as the Spiral Bevel is a common example of profiles of gears that are used on the accurately made shafts.

Gear Shaft key

A gear shaft key or simply a shaft key is defined as a machine element utilized for making a connection between the gears’ rotating part and the transmission shaft. The Gear shaft key’s function, as well as the keyway, prevents the relative motion between hub and shaft. Thus it allows the transmission of torque. 

For the gear shaft key to be fixed, the hub must have the keyway and the shaft must have the key seat. Here it should be mentioned that half of the shaft key allows the fixing of the key seat and half of the shaft key allows the fixing of the keyway. 

Thus the overall combination is referred to as the keyed joint.  In this regard the concept of the keyway is vital. It is the groove cut within the section of a gear, hub, or some other machine element that is rotating and the electrical connector. 

This groove helps to make sure their orientation towards one another is usually fitted with a particular key.  Gear shaft keys are normally available in different sizes like semi-circular, square and rectangular, and different materials.

Name

Production Process

1. Heat Treatment Process of Gear Shafts

In the entire process of shafts machining, sufficient heat treatment procedures should be arranged to ensure the mechanical properties and machining accuracy of the gear shaft, and also improve the machinability of the workpiece.

1) Generally, normalizing is the first treatment after rough shafts are forged to relieve internal stress, refine the grains, and improve the machinability.

2) Arrange Q+T treatment after rough machining. Through rough turning, drilling, and other processes, most of the machining allowance of the gear shaft is cut off. In this stage, the cutting force and heat are very large. Under the action of force and heat, the shaft will have large internal stress. The stress can be relieved by Q+T treatment, instead of aging treatment, and the required toughness can also be obtained simultaneously.

3) At this stage, except for the machining allowance of important surfaces, other surfaces and dimensions have reached the design requirements. At this time, arrange local quenching treatment on teeth and another required surface to meet the hardness requirements and ensure the wear resistance of these surfaces. The subsequent final machining process will relieve the quenching deformation.

2. Machining Process of Gear Shafts

The machining process sequence is based on the principle of confirming the datum surface first, machining the general accuracy surface prior to the high accuracy surface, and machining main sizes in priority.

In the gear shaft machining process, heat treatment is the demarcation. Rough machining prior to QT treatment, semi-finish machining prior to quenching, and finish machining behind quenching. Arrange the finish machining process at the final stage to avoid the main surface accuracy being affected by the stress during other surface processing.

Product Package

When arranging the gear shaft process, the following points should also be noted.

(1) Because the tooth profile machining is relatively a large workload and difficult process content, the tooth profile rough machining should be arranged behind the semi-finish machining of the excircle to improve the accuracy. The tooth profile finishing should be arranged behind all the external surfaces machining completed, in order to relieve the heat treatment deformation caused by the tooth partial quenching.

(2) Machining the bigger excircle prior to smaller excircles to ensure the shaft’s rigidity in the production processes.

(3) The other processing, such as the keyway of the gear shaft should generally be arranged behind the excircle finish turning or rough grinding, but before the finish grinding. If the keyway is milled before finish turning, then there will be the vibration of intermittent cutting when finish machining. It will affect the processing quality, and keyway sizes and also easy to damage the tool.