How close should the tool rest be to the grinding wheel?

Keep the tool rest as close to the grinding wheel as possible without touching it. The tool rest must be minimally within  of an inch of the grinding wheel. If a magnetic chuck is being used on the surface grinder, make sure it is holding the work securely before starting to grind.

What is the safe distance between the grinding wheel and wheel rest?

The gap should be no more than 3mm as a bigger clearance could cause the tool to become jammed in between. no less than 3mm so that debris also doesn’t cause the grindstone to jam.

What is the max distance the tool rest can be from the grinding wheel on a bench grinder?

1⁄8-inch
An adjustable work rest must also be installed and adjusted to maintain a maximum clearance of 1⁄8-inch between it and the wheel. This prevents the operator’s hands or the work from being jammed between the wheel and the rest.

How much of a gap should there be between the work rest and the face of the grinding wheel?

1.5mm – 2mm
Contributing factors to the incident where that the worker was wearing gloves, the large gap existing between the wheel and the tool rest as well as the work piece being too small to be used in the grinder. wheel and rest is no greater than 1.5mm – 2mm or as per OEM. Never force the work piece against a wheel.

How close should a tool rest and spark breaker be set to the wheel on pedestal grinder?

1/16″
The tool rest and spark breaker should be set at a maximum 1/16″ from face of grinding wheel.

What is the maximum allowed distance between an abrasive wheel and its protective safeguard?

1/4-inch
Because grinders run at such high RPM, wheels actually explode when they break, causing very serious injuries, blindness and even death. In addition, the distance between the grinding wheel and the adjustable tongue-guard — also known as a “spark arrestor” — must never exceed 1/4-inch.

What is the maximum clearance between a work rest and a grinding wheel in MM?

Never adjust rests while wheels are moving. Work rest height should be on horizontal centre line of the machine spindle. Maintain 6 mm (1/4 in.) wheel exposure with a tongue guard or a movable guard.

What is the maximum distance that a work rest should be from the wheel face?

one-eighth inch
Work rests shall be kept adjusted closely to the wheel with a maximum opening of one-eighth inch to prevent the work from being jammed between the wheel and the rest, which may cause wheel breakage.

What is grit size in grinding wheel?

Grit size typically runs from coarse (16 -24 grit), medium (36 – 60 grit) and fine (80-120 grit). Superfine grits run from 150 and higher. Grinding wheels usually will be between 24 and 100 grit. Honing stones and jointing stones and other polishing abrasives will be 150 grit and higher.

When grinding the operator should not stand?

Do not stand in direct line with the grinding wheel when using the grinder. Stand to the side so that if a piece of the grinder wheel is thrown off it will not hit you. 5.

How much gap is maintained between the grinding wheel and the work based on a pedestal grinder?

The gap is usually maintained to be approximately 0.1mm to 0.3 mm. During the grinding operation one side of the wheel takes part in the grinding operation whereas the other side of the wheel is being dressed by electrochemical reaction.

What does D mean on an abrasive wheel?

D- Diamond. B- Cubic Boron Nitride. Z- Zirconium (metals) Second digit(s) (number)- Grain size.

How far apart should workrests be on a grinding grinder?

Grinder Safety – Work-Rests and Tongue-Guards OSHA specifies that work-rests be kept adjusted to within 1/8-inch of the wheel to prevent the workpiece from being jammed between the wheel and the rest, resulting in potential wheel breakage.

How far should a work rest be from the wheel?

Work rests shall be kept adjusted closely to the wheel with a maximum opening of 1/8 inch (0.3175 cm) to prevent the work from being jammed between the wheel and the rest, which may cause wheel breakage. The work rest shall be securely clamped after each adjustment.

How far should the tongue guard be from the grinding wheel?

In addition, the distance between the grinding wheel and the adjustable tongue-guard — also known as a “spark arrestor” — must never exceed 1/4-inch. Because the wheel wears down during use, both these dimensions must be regularly checked and adjusted.

What is the OSHA standard for grinding wheels?

OSHA specifies that work-rests be kept adjusted to within 1/8-inch of the wheel to prevent the workpiece from being jammed between the wheel and the rest, resulting in potential wheel breakage. Because grinders run at such high RPM, wheels actually explode when they break, causing very serious injuries, blindness and even death.