Weldments in fabricated steel beams are designed for

The expected life of a ball bearing subjected to a load of $$9800N$$ and working at $$1000RPM$$ is $$3000$$ hours. What is the expected life of the same bearing for a similar load of $$4900$$ $$N$$ and a speed of $$2000rpm$$

Axial operation claw clutches having self-locking tooth profile

Riser is designed so as to