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        About USTo science and technology To provide customers with the most satisfactory service!

        Current position:主頁 > Index > Casting quality >

        Customers can refer to the following technical standards and standards of the company to design precision casting products.
        - TOLERANCES (unit: mm)
        I recommended tolerances


        Nominal size
        --10
        10-- 30
        30 -- 100
        100 -- 300
        300 -- 1000
        Straightness
        General accuracy
        0.12
        0.18
        0.27
        0.40
        0.60
        High-precision
        0.08
        0.12
        0.18
        0.27
        0.40
        Roundness
        General accuracy
        0.18
        0.27
        0.40
        0.60
        0.90
        High-precision
        0.12
        0.18
        0.27
        0.40
        0.60
        Parallelism, perpendicularity, symmetry
        General accuracy
        0.18
        0.27
        0.40
        0.60
        0.90
        High-precision
        0.12
        0.18
        0.27
        0.40
        0.60
        Coaxial degree
        General accuracy
        0.18
        0.27
        0.40
        0.60
        0.90
        High-precision
        0.12
        0.18
        0.27
        0.40
        0.60

        I recommend the size tolerance:
        Nominal size Tolerance (general accuracy) Tolerance (general accuracy)
        Less than 3 ±0.200 ±0.100
        3------6 ±0.240 ±0.120
        6------10 ±0.260 ±0.130
        10------16 ±0.270 ±0.140
        16------25 ±0.290 ±0.150
        25------40 ±0.320 ±0.160
        40------63 ±0.350 ±0.180
        63------100 ±0.390 ±0.200
        100------160 ±0.440 ±0.220
        160------250 ±0.500 ±0.250
        250------400 ±0.550 ±0.280
        400------630 ±0.600 ±0.320
        630------1000 ±0.700 ±0.350

         

        No less than 0.5 degrees angle tolerance:
        The minimum aperture casting D = Phi 2
        Through hole D > Phi 7, length L = 3D; D < Phi 7 hole length, L = 2D
        Blind D > Phi 7, depth of L = 2D; D < Phi 7 blind hole depth, L = D
        - cast fillet
        Round R = 0.3, R = 0.5 fillet
        The minimum wall thickness
        General 1 mm, part of up to 0.6 mm
        The surface roughness
        Non ferrous metals: 1.6 m ~ 3.2 m
        Black metal: 3.2 m ~ 6.3 m
        The overall size and weight of castings:
        This profile is generally not more than 1400 * 600 * 600mm, the weight is less than 40kg

        The material selection:
        ] can provide casting materials include: aluminum alloy (Al Mg alloy, Al Li alloy, copper alloy (containing beryllium bronze alloy), stainless steel (including precipitation hardening stainless steel) and nickel base alloy, cobalt based alloys, iron-based alloys, etc.. The following is a common material for the user reference:

        Aluminium alloy
        Alloy code ZL101(A), ZL104, ZL105(A), ZL114A, ZL201(A), ZL205A ZL301, ZL303, ZL401, ZL402
        Alloy grades ZAlSi7Mg(A), ZAlSi9Mg, ZAlSi5Cu1Mg(A), ZAlSi7Mg1A, ZAlCu5Mn(A), ZAlCu5MnCdVA, ZAlMg10, ZAlMg5Si1, ZAlZn11Si7, ZAlZn6Mg
        Copper alloy
        Copper ZCu99.7 ZCu99.5
        Aluminium bronze ZCuAl10Fe3
        Beryllium bronze ZCuBe0.5Co2.5 ZCuBe0.5Ni1.5 ZCuBe2.4Co0.5
        Brass brass ZCuZn38 ZCuZn40Pb2 ZCuZn16Si4 ZCuZn31Al2
        Steel and stainless steel
        Structural steel ZG35Cr13 ZG30CrMnSi.
        Deformed super heat resistant alloy Cobalt based solid solution Stellite6B
        Ni based solid solution Inconel600
        Stainless steel Martensite ZG1Cr13 ZG2Cr13
        Austenitic type ZG0Cr18Ni9 ZG1Cr18Ni9Ti ZG0Cr17Ni12Mo2
        Austenite ferrite ZG0Cr22Ni5Mo3N
        Precipitation hardening ZG0Cr17Ni4Cu4Nb 17-4PH 15-4PH
        The casting quality standards:
        ] casting classification, grading and the chemical composition, mechanical properties, surface quality, internal quality compliance HB963-90, HB5312-85, HB5430-89, HB5480-91, RZLB1-86 and other standard of.
        The production cycle
        After the common casting products in the contract after the entry into force of 4 to 6 weeks to complete the mold production and delivery of qualified samples. Special products separately.
        Note the order of investment castings:
        ] to do a good job in the parts of the structure process of review work (higher dimensional accuracy and surface roughness is fine, the shape of the casting more and more complex, the casting cushion more hours and even more so), so as to make casting design and material selection more reasonable, easy guarantee of the quality of casting, reduce casting production cost budget, avoid because of design problems caused delays the production time and pay more costs. (in the course of the problem, contact us, negotiate with our foundry Engineers).
        Length and thickness tolerance (mm)
        Size range General tolerances Special tolerance
        0-6 +/-0.10 +/-0.08
        6-10 +/-0.13 +/-0.10
        10-18 +/-0.16 +/-0.13
        18-30 +/-0.20 +/-0.16
        30-45 +/-0.25 +/-0.20
        45-62 +/-0.30 +/-0.25
        62-87 +/-0.35 +/-0.30
        87-125 +/-0.45 +/-0.35
        125-175 +/-0.50 +/-0.45
        175-250 +/-0.60 +/-0.50
        250-400 +/-1.00 +/-0.80
         

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