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Melchiorre SP3 600 (piano in rame copp...
二手机
MELCHIORRE Sp3 / 600 4 rings copper plate, rings with ceramic inserts,
diamond lapping lapping machine Under power in our warehouse in
Gussago BS Mimu machine tools, Lapping is a
[machining](https://en.wikipedia.org/wiki/Machining) process in which
two surfaces are rubbed together with an
[abrasive](https://en.wikipedia.org/wiki/Abrasive) between them, by
hand movement or using a machine., This can take two forms. The first
type of lapping (traditionally called
[grinding](https://en.wikipedia.org/wiki/Grinding_machine)), involves
rubbing a brittle material such as
[glass](https://en.wikipedia.org/wiki/Glass) against a surface such as
[iron](https://en.wikipedia.org/wiki/Iron) or glass itself (also known
as the lap or grinding tool) with an abrasive such as [aluminum
oxide](https://en.wikipedia.org/wiki/Aluminum_oxide), [jewellers
rouge](https://en.wikipedia.org/wiki/Jeweller%27s_rouge), [opticians
rouge](https://en.wikipedia.org/wiki/Cerium(IV)_oxide),
[emery](https://en.wikipedia.org/wiki/Emery_(mineral)), [silicon
carbide](https://en.wikipedia.org/wiki/Silicon_carbide),
[diamond](https://en.wikipedia.org/wiki/Diamond), etc., between them.
This produces microscopic [conchoidal
fractures](https://en.wikipedia.org/wiki/Conchoidal_fracture) as the
abrasive rolls about between the two surfaces and removes material
from both., The other form of lapping involves a softer material such
as M636876 [pitch](https://en.wikipedia.org/wiki/Pitch_(resin)) or a
[ceramic](https://en.wikipedia.org/wiki/Ceramic) for the lap, which is
charged with the abrasive. The lap is then used to cut a harder
materialâthe workpiece. The abrasive embeds within the softer
material, which holds it and permits it to score across and cut the
harder material. Taken to a finer limit, this will produce a polished
surface such as with a polishing cloth on an automobile, or a
polishing cloth or polishing pitch upon glass or steel., Diameter: 600
mm, Number of rings: 4, Top material: copper
seller offer No.
resale 20
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