Metalworking Machines - Surface Grinders

What should you know before working with a surface grinder?

A surface grinder is a tool that uses a stationary, abrasive, rotating wheel to shave or finish a metallic surface. Surface grinders can be dangerous if not used properly. Please refer to the OSH Answers on Metalworking Machines - General for basic safety tips, and to Abrasive Wheels for further information.

• context Read the owner's manual carefully.
• context Ensure that all parts, switches and plugs are in good working condition.
• context Always check the grinding wheel for damage or wear before each use.
• context Make sure that the material you wish to shape can be used in the grinder. Soft materials such as aluminum or brass may clog the abrasive wheel and stop the wheel from performing effectively.
• context Make sure the material is securely fastened in place by a vise.
• context Make sure you understand instructions and are properly trained before operating a surface grinder.

What are some basic safety principles to know when using a surface grinder?

• context Wear appropriate CSA-certified safety glasses and other required protective equipment (including CSA-certified footwear and CSA-certified hearing protection). In addition, use the eye shield on the grinder, when provided.
• context Make sure that the grinder has a working emergency start/stop button (e-stop) within easy reach of the operator.
• context Check the grinding wheel before mounting it. Make sure it is properly maintained and in good working order.
• context Follow the manufacturer's instructions for mounting grinding wheels.
• context Keep the face of the wheel evenly dressed.
• context Make sure that the wheel guard covers at least one-half of the grinding wheel.
• context File off any burrs on the surface of the work that is placed on the magnetic chuck.
• context Clean the magnetic chuck with a cloth and then wipe with the palm of your hand.
• context Place a piece of paper slightly larger than the work piece in the centre of the chuck.
• context Position work on the paper and turn on the power to the magnetic chuck.
• context Check that the magnetic chuck has been turned on by trying to remove work from the chuck.
• context Check that the wheel clears the work before starting the grinder.
• context Run a new grinding wheel for about one minute before engaging the wheel in the work.
• context Wait for the wheel to reach maximum speed before using it, as it may have unseen faults.
• context Stand to one side of the wheel before starting the grinder.
• context Turn off the coolant before stopping the wheel to avoid creating an out-of-balance condition.
• context Keep the working surface clear of scraps, tools and materials.
• context Keep the floor around the grinder clean and free of oil and grease.
• context Use an appropriate ventilation exhaust system to reduce inhalation of dusts, debris, and coolant mists. Exhaust systems must be designed and maintained appropriately.
• context Follow lockout procedures when performing maintenance work.