Hardness of grits

Relative hardness of the various types of abrasive in comparison with the diamond which is given a MOH value of 10 are as follows:

Commercial name

Formula

Origin

scale

Commercial name

Formula

Origin

scale

Crocus

Fe2O3

Artificial

and natural

5.5-6.5

Quartz

S102

Natural

7.0

(flint, agate)

Garnet

(Almanite)

Al203Fe03Si02

Natural

7.0-8.5

Emery

Si02FeOAl20,

Natural

7.0-9.0

Aluminium oxide

Complex

(corundum)

A1203

Artificial

9.0-9.4

Silicon carbide

(carborundum)

SiC

Artificial

9.5-9.6

Diamond

(carbonado)

c

Natural

10.0

Woodworking Tools and Installation Tips

Woodworking Tools and Installation Tips

There are a lot of things that either needs to be repaired, or put together when youre a homeowner. If youre a new homeowner, and have just gotten out of apartment style living, you might want to take this list with you to the hardware store. From remolding jobs to putting together furniture you can use these 5 power tools to get your stuff together. Dont forget too that youll need a few extra tools for other jobs around the house.

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