The suspension spring supports the outer tub and keeps the tub steady during loads that could cause an unbalance. If this part breaks, is worn down, or has stretched out and lost its spring, it could cause the load to be off-balance which can lead to excessive shaking, moving, noise, and leaks.
An important early lathe in the UK was the horizontal boring machine that was installed in 1772 in the Royal Arsenal in Woolwich.It was horse-powered and allowed for the production of much more accurate and stronger cannon used with success in the American Revolutionary War in the late 18th century.
A burr mill, or burr grinder, is a mill used to grind hard, small food products between two revolving abrasive surfaces separated by a distance usually set by the user. When the two surfaces are set far apart, the resulting ground material is coarser, and when the two surfaces are set closer together, the resulting ground material is finer and smaller.