Full sizes of spline hubs available for your machine
YNF Machinery is committed to providing total solutions for excavator accessories. The coupling is one of the most important accessories. In the center of the coupling – the spline hub, although the damage rate in daily use is very low, a high-quality spline can greatly reduce the damage to the hydraulic pump and engine during the operation of the machine.
■ Materials
If the material is not strong enough on the flywheel side, it can be compensated for by changing the bolt length. YNF Machinery is always using the best material to provide the cylindrical hub.
Hub type: Cylindrical hub Material: S 45 C Tensile strength： 569 N/mm2 or higher
■ Spring pin bore dimensions
All sizes of spring pins are available. Our products perfectly meet your machine’s needs.
■ Cylindrical hub
■ Coupling a pump shaft (spline shaft) to a cylindrical hub
A clamping hub that completely locks a cylindrical hub to a spline shaft using CENTA-LOCK action.
There are two ways to categorize the spline hubs, one is by the outer diameter, and the other is by the inner teeth.
YNF Machinery provides spline hubs with 60mm outer diameter to 160 mm outer diameter. Also, we provide the hubs from 0 teeth hubs (key-way hub) to 27 teeth hubs.
Moreover, we also have the ability to produce the hubs according to your requirement. We provide customized service for our customers.
There are 4 steps to confirm the spline hub that you need:
- Measure the outer diameter. To categorize a hub by the outer diameter is a good way. So it’s easy to confirm it by its outer diameter. There are 60 mm outer diameter, 70 mm outer diameter, 85 mm outer diameter, 100 mm OD, 125 mm OD, and 160 mm OD.
- The second step is to count the inner teeth. Because the inner teeth of the spline hub are connected to the pump shaft, you can also count the teeth of the pump shaft. So far, we have developed the following teeth types: 0 teeth, 9 teeth, 10 teeth, 11 teeth, 12 teeth, 13 teeth, 14 teeth, 15 teeth, 16 teeth, 17 teeth, 21 teeth, 22 teeth, 24 teeth, 27 teeth.
- The third step is to measure the inner diameter. Our spline hubs meet different standards which areJIS D2001, SAE J498b and ANSI B92.1. So it’s easy to find the hubs that you need for your machine. If you don’t know what standard of the hub you need, you can just send us the measurement of the hub. We’ll confirm it for you.
- The last step is to check the height of the hub. If you have the old hub at hand, just measure your old hub. Or you can check your pump. The hub is usually slightly shorter than the pump shaft making sure there’s enough room.
There are two kinds of customization ways.
In one situation, you have the old hubs in your hand. In this situation, you can send us the photos and dimensions of the hub to our staff. We’ll confirm the correct hub for you. If we don’t have the hub in stock, we’ll confirm if we have the teeth mold, and we can make it based on our mold. Or you’ll have to send the sample to us.
The second situation is that you only have the drawing. In this case, you can send us the drawing of the hub to our staff and our staff will confirm the details with you.
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Currently, the material of the spline hubs we produce is S45S which is the most suitable material. Because we are producing it in bulk, with scale production, we can order the material at a lower cost. If producing with other materials, the cost will be much higher causing the product price high.
The spline hubs fit the Centaflex-A couplings and Centaflex-H couplings.