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Lapping Compound: Emery Ground, Settled Fine and Mixed with Oil
Lapping rubs two surfaces together with an abrasive between them; in hand lapping a slurry of emery powder is spread on the plate. Crush and grind emery rock, settle out the fine part in water, dry it and mix it with oil into a paste.
The picture: our diagram, emery rock, grinding, fine powder in oil.
Beginner
Two days with settling
Instructions
1
1
Crush and grind
Crush and grind
Break emery rock on a stone with the hammer and grind the pieces in the mortar. Wear a mask and glasses.
Materials for this step:
Emery Rock0.5 kgTools needed:
Hammer
Flat Stone Slab
Mortar and Pestle
Dust Mask
Safety Glasses2
2
Settle out the fine grade
Settle out the fine grade
Stir the powder into a bucket of water, wait a minute for the coarse grit to sink, and pour the cloudy water into a second bucket. Let that settle, pour off the water and dry the fine sediment on a tray.
Tools needed:
Bucket
Water
Flat Drying Tray3
3
Mix with oil
Mix with oil
Sieve the dry powder and work it into oil to a smooth paste. Keep it in a closed jar.
Materials for this step:
Olive Oil0.1 literTools needed:
Fine Sieve
Glass Jar4
4
Paste proportion
Paste proportion
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