Posted by Daemar Inc.
Daemar manages the sourcing and delivery of millions of Essential Components to the manufacturing and MRO marketplace. I... Read more
Sealing components from Daemar work best with proper shaft and bore design.
As a major provider of essential components for industry, Daemar Inc. plays two important roles for its customers: a supplier of products, and an expert team offering advice on getting the most out of these products. Take sealing components. For optimal seal performance, the bore and the shaft – the two components with which seals interact – must be designed properly. Here is Daemar’s expert advice on designing shafts and bores to get better performance from seals.
Extending seals’ operational life
Appropriate bore and shaft design will not only improve seal performance, but also extend the seals’ operational life. Bores should have adequate lead-in chamfer and proper tolerance to enable the correct press fit of the seal’s outer casing after installation, thereby eliminating leaks between seals and bores. This also prevents seal rotation or movement during operation. Shafts also require proper lead-in chamfer, as well as appropriate diameters and surface finish. Minimal shaft movement and misalignment boost performance – and limit seal lip wear.
Material, hardness, finish, lead-in chamfer, and tolerance should be considered when designing bores. Cast iron and steel provide good surfaces for accepting metal and rubber O.D. seals. Bores should be hard enough to withstand the seal’s O.D., while the finish should be 0.8 to 1.6 μm Ra for metal O.D. seals, or 2½ to five μm Ra for rubber ones. The lead corner should be chamfered and bore-free.
Daemar recommends the following design considerations:
To learn more, contact Daemar.
Posted by Daemar Inc.
Daemar manages the sourcing and delivery of millions of Essential Components to the manufacturing and MRO marketplace. I... Read more