Abstract

The vibration generated by chain-saws may cause Raynaud’s syndrome (white-finger disease) in workers. While it is known that blade sharpness affects vibration levels, the precise nature of this relationship is poorly understood.

Using a experimental test bed, the effects of 17 types of sharpening techniques on vibration and cut quality were studied.

The weighted vibration level varies by a factor of two, depending on the sharpening technique. Sharp blades decrease vibration, and improve cut quality.

An appropriate sharpening stand should be developed. Vibration standards for chain-saws should take the type of chain and its sharpness into account. Forestry workers should be trained in optimal blade sharpening.