Course Objective


Course Objective;
Students will process materials using hand tools while following these elements of knowledge, skills, strategies, attitudes and perceptions related to the competency

Students will learn, for the competency as a whole:

• Basic technical terminology
• Basic hand tools used in this competency: planes, saws, mallets, hammers, wood chisels, squares,
files, rasps, pliers, screwdrivers, measuring instruments, etc.
• Occupational health and safety: individual protective equipment, equipment safety, ergonomic work posture, etc.
• Method for using materials economically
• Importance of following the manufacturing process for the object

Specific
attitude required for this competency:

patience, in order to persevere in spite of difficulties encountered

Wednesday, 16 September 2015

Grinding and Honing / working up the grits

When honing a plane iron or chisel you may have a preference to type of stone or materials.
Names like India stone and Ceramic Stone are commonly heard.
Many materials are used as abrasives to grind and hone steel 

Man Made
These materials can be also glued to paper producing sand paper

Also


 Diamond

And Natural (mined and cut right out of the ground)



 Some stones insist lubricant is needed to cut steel and so often we classify them accordingly


In this class we will explore a variety of stones and sandpaper.
It is not obligatory to hone with only one category of material at a time.
the important thing to remember is that one must respect the order of grits.

The rule to remember is that the lower the number, the courser the grit.
For example;   A 320 grit is courser than 600 grit.

As a matter of fact, one can divide the grinding and honing process by grit,

Eg:  Grinding <  320 <  Honing

The confusing thing though is that there are other systems of grits too.
For woodworkers, the other system is Japanese 
As you can see a 500 U.S. grit is equivalent to a 1000 Japanese grit
 Most Japanese waterstones are Aluminum Oxide which has a characteristic called Friability.

Diamond Stones are the most durable.
So we use them here at RTC

Search the blog for grinding and honing articles. 
Perhaps comment about your experience.