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Dwi Rahdiyanta
FT-UNY
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Topik
Konstruksi
batu gerinda
Pemilihan
batu gerinda
Spesifikasi
batu gerinda
Mounting
batu gerinda
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Konstruksi
batu gerinda
Abrasives
Perekat
Perekat
Perekat
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Abrasives
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Natural
Abrasives
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Artificial
abrasives
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SILIKON CARBIDE
1. Extreme keras, tajam dan getas 2. Digunakan untuk : besi tuang, brass, soft
bronze, copper, Al dan lain-lain
Klasifikasi silikon carbide: 1. 37c grey color all aplication
kecuali cemented carbide 2. 39c green color cemented
carbide
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UKURAN BUTIRAN ABRASIVES (µm)…
1. Coarse : 1700, 1400, …, 630 2. Medium : 500,…, 250 3. Fine : 220,…, 125 4. Very fine : 106,…, 58 5. Flour size : 52,…, 26
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BOND (PEREKAT)…
Vitriefied bond (V)
Silicate bond (S)
Resinoid bond (B)
Rubber bond (R)
Shellac bond (E)
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GRADE… (identik dg kekerasan)
• Adalah kekuatan relatif perekat dalam
memegang butiran abrasive untuk diam
ditempatnya
• Jika jumlah perekat persentasenya
meningkat maka ikatan antar butiran
abrasive juga meningkat.
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GRADE…
1.Very soft : E, F, G, H
2.Soft : I, J, K
3.Medium : L, M, N, O
4.Hard : P, Q, R
5.Very Hard : S, T, U, W Z
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Structure
Adalah elemen penting daklam batu
gerinda yang ditentukan oleh proporsi dan
tata letak perekat dan butiran abrasive
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Structure
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STRUCTURE…
1.Close spacing : 0, 1, 2, 3
2.Medium spacing : 4, 5, 6
3.Wide spacing : 7, 8, 9, 10, 11, 12
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External cyl. grinding
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Menggerinda roda gigi
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Internal cyl. grinding
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Crank shaft
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Poros Nok
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Bearing
(dalam)
valve
Contoh komponen
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Presicion Grinding
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Presicion Grinding
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Presicion Grinding