When it is necessary to harden and temper long thin components, such as blades for example for hedge-trimmers, it is possible to harden in furnace loads in which the blades are suspended vertically but are not restrained. The resulting slight bowing of the blades can be rectified by clamping them together between holding plates and tightening the pack to a precise pre-determined level of torque and then tempering the pack in the normal way. This technique is termed temper-setting and is often used for hardening and tempering clutch plates, washers and similar thin components.
When it is necessary to harden and temper long thin components, such as blades for example for hedge-trimmers, it is possible to harden in furnace loads in which the blades are suspended vertically but are not restrained. The resulting slight bowing of the blades can be rectified by clamping them together between holding plates and tightening the pack to a precise pre-determined level of torque and then tempering the pack in the normal way. This technique is termed temper-setting and is often used for hardening and tempering clutch plates, washers and similar thin components.
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