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Bean knowledge "Chapter 4" of the grinding wheel

With the bean knowledge Chapter 4 "best use circumferential speed degree and number of revolutions" (rotary speed) of the whetstone
 
  • Use of best circumferential speed degree
  • Circumferential speed degree
  • Number of revolutions (rotary speed)
  • Destruction turn circumferential speed degree

Use of best circumferential speed degree

You must certainly follow the use of best circumferential speed degree in security, and it is said that you must not use it at the speed beyond this under any circumstance. This is established in labor security hygiene rule Article 119.
Say the use of best circumferential speed degree at a circumferential speed degree of the maximum that a whetstone to grind can use safely; several meters per second (m/sec)
I am displayed by no unit.

Circumferential speed degree

Because a whetstone turns for one second, I express length to advance. (unit: m/sec)
Circumferential speed degree

Number of revolutions (rotary speed)

The axis of the installation tool expresses number of revolutions to turn for one minute. (unit: r.p.m)
A circumferential speed degree and the relative expressions of the number of revolutions are as follows.
For example, how many will the number of best number of revolutions that I can put on in case of the cutting whetstone (e.g.,: valuables 105) of the use of best circumferential speed degree 80 indication become?
 
 
In the case of "valuables 105," a grinder to 14,556 rounds a minute understands that wearing is possible.

Destruction turn circumferential speed degree

The maximum thing is an internal stress caused by the centrifugal force by the turn in various factors to influence safely of the grinding wheel to grind.
If a circumferential speed degree gradually rises and exceeds strength peculiar to it of the grinding wheel which this internal stress grinds, the grinding wheel destroys it.
I call a circumferential speed degree of the grinding wheel to grind of this time "destruction turn lap speed", and it is the basics to find a degree safely of grinding wheel which it grinds to know this value.
 
The use of best circumferential speed degree of the grinding wheel to grind divided this destruction turn circumferential speed degree by a constant factor of safety and is set around all this rule, standard point in the security about a grinder and the grinding wheel to grind.
 
At the time of the use of grinding wheel, please use it at speed not to exceed "use of best lap speed" after checking the best use circumferential speed degree of the grinding wheel indication and the number of revolutions of the use tool for security.
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