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 |
