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Safety Rules of Grinding Wheels   
 

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Recommended Safe Operating Practices
 
1.

Carefully store grinding wheels in a proper condidtion. I.e. away from heat and humidity sources.
2.

Select correct wheel for your operation. "Ring" wheel and inspect for cracks. Never use cracke wheel.
3.

Never exceed maximum safe operating speed marked on wheel.
4.

Use clean recessed matching flanges at least 1/3 of wheel diameter.
A.

A flange-key is required to ensure concentric operation.
B.

The inside diameter of the wheel should be larger than the spindle diameter.
C.

The contact side of the flange should be recessed to prevent from slipping off.
D.

The contact area between flange and wheel should insert with blotters or rubber pad with a thickness smaller than 0.025" (0.6mm)
E.

Two flanges on both sides should be of the same size.
5.

Never alter hole sizes of wheels or force a wheel on to a spindle.
6. Keep work rest adjusted within 3mm of wheel face.
7.

Adjust wheel guard and put on safety glasses before grinding.
8.

Wheels newly mounted or rarely used must run idly for at least one minute before starting to grind.
9.

Grind only on face of straight wheel. Use disc wheel for side grinding. Light side grinding permitted on cup or saucer wheel.
10. Do comply with ANSI B7.1 safety code for safe grinding operation.

Correct Mounting

 InCorrect Mounting InCorrect Mounting

Grinding Wheels Speeds

The speed at which a grinding wheel revolves is important because too slow a speed means wastage of abrasive without getting much useful work in return, whereas an excessive speed may result in hard grinding action and may introduce the danger of breakage. As a general proposition, it is better to operate a grinding wheel at somewhere near the speed recommended by KINIK we have found by years of experience that certain approved speeds work better than others. The grits, grades and structures usually recommended for specific grinding operations are based on the assumption that approximately the recommended speeds is employed. If for some reason the speeds cannot be, as recommended then the grade must be changed to suit the particular condition. Some of the more common efficient operating speed regulations for particular types of grinding wheels are given below in m/min.
 
Efficient Operating Speeds in S.M.P.M (m/min)
The most efficient operating speed may be different than the maximum operating speed marked on the wheel. In no case should wheels be operated faster than the speed marked on the wheel.
Cutlery (Large-Offhand) ................. ................................. 1220-1520
Cut-off (Rubber, Shellac, Resinoid).... ................................. 2740-4850*
Cylinders (including Hemming).......... ................................. 800-1520*
Cylindrical Grinding......................... ................................. 1520-4000*
Disc Grinding................................. ................................. 1220-1680
Internal Grinding............................ ................................. 1220-4000*
Knife Grinding (machine Knives)........ ................................. 1070-1350
Mounted wheels and Points-
Speed varies with shape, mandrel dia. overhang (outside chuck); see mounted wheel maximum safe speed book.
Portable Grinding........................... ................................. 1950-4000*
Snagging - Vitrified Small Hole.......... ................................. 1520-1830
Snagging - Resinoid and Rubber........ ................................. 2130-2900*-4000*
Surface Grinding ........................... ................................. 1220-1950
Tool Grinding................................. ................................. 1520-1830
Weld Grinding................................ ................................. 2900-4400
* The higher speeds are premitted only shere bearings, protection devices and machine rigidity are adequeate.
 

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