Plain linear bearings and track roller wheel based bearings can use a wide variety of shaft materials, depending on the application requirements. Shafts for recirculating linear bearings are typically made of bearing-grade carbon steel or stainless steel. For very harsh environments or special conditions, shafts can be plated or coated to withstand abrasive contaminants.
What are Linear Shafts?
Linear Shafts are long, rod-shaped devices that provide linear motion for different applications. Linear motion applications can be found in the aerospace, medical, packaging and industrial sectors.
A better shaft equals better performance. A shaft design plays a crucial role in the functioning of the shaft. Shafting is a critical component of linear motion machines. There are different types of linear shafts to get the job done.
Types of Linear Motion Shafts
- Tapped - internal threads allow you to mount these shafts onto threaded studs
- Threaded - also do not need shaft support, you can mount the threaded rods into tapped holes
- Hollow - hollow shafts are lighter than solid shafts, so it helps reduce the weight of your total system.
Materials and Coatings
Most linear shafts are made of alloy or stainless steel, here’s the reason why.
- Alloy steel - Alloy steel provides superior durability
- Stainless steel - Steel shafts are used with typical linear bearing applications. Stainless steel shafts are suitable for cleanroom environments or when introduced to severe conditions, such as high humidity or erratic temperatures.
- Aluminium linear - These shafts can provide good electrical and thermal connectivity, high reflectivity and oxidation resistance.
Types of Load
- Radial Load - Radial loads act as the right angles to the shaft. A radial load can also be referred to as the ‘overhung load’ because of how it hangs from the shaft.
- Axial Load - Axial load acts in the same direction as the shaft. It is considered when the load is parallel to the post.
- Angular - These are designed to accommodate combined loads, acting radial and axial loads.
Why Primeroll
Primeroll International Private Limited, a member of the largest bearing distribution group of India with over 40+ years of experience is the authorised exclusive distributor of bearing and shaft solutions in India.
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