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Investment Casting vs Forging for Agricultural Wear Parts — the 2026 Farm Machinery OEM Procurement Decision Matrix

Investment Casting vs Forging for Agricultural Wear Parts — the 2026 Farm Machinery OEM Procurement Decision Matrix

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6 Questions to Ask Your Investment Casting Supplier — From ISO 8062 Tolerance to Post-Processing

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Cement Plant Maintenance Teams Specify Heat-Resistant Alloy Sintering Grate Bars for Rotary Kiln Cooling Zone Replacement

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0102030405

Ningbo Investment Casting Co., Ltd

2021-07-29

By Li Chenyu / hcfire360

Casting Roughness Comparision Table

Nominal value Ra	micrometre(um)	50	25	12.5	6.3	3.2	1.6	0.8	0.4	0.2	0.1	0.05	0.025
Nominal value Ra	microinch(uinch)	2000	1000	500	250	125	63	32	16	8	4	2	1
Roughness number		N12	N11	N10	N9	N8	N7	N6	N5	N4	N3	N2	N1

Surface Roughness Designations Microinches	Metric Equivalent Micrometers
1/4（0.25）	0.006
1/2（0.5）	0.013
1	0.025
2	0.05
4	0.1
8	0.2
16	0.4
18.9	0.48
32	0.81
63	1.6
119.5	3.04
125	3.18
250	6.35
500	12.7
1000	25.4
2000	50.8

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