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Our company adopts the leading international precision castings technology and patent for ensuring dimensional precision of product is up to 0.003"/1" (CT3) and surface roughness of casting can be controlled over,It to be as free process products and semi-finished products, internal quality standard can reach A grade of American military standard and top grade of aviation standard.
Our technology can meet your strict requirements about material qualities and metallographyit can also complete facture of complex structure products and ensure that entirety and consistency of castings, thus making a great improvement for enduring burthen strength performance of productsa remarkable improvement for quality intensity proportionto strengthen processes capability of high temperature and resist eroding.

Tolerance:

  • Concentricity:
    External Diameter: 3/4".... 1"........ 1 1/2" ....2"
    Inner Diameter: .....1/4".... 1/2"....... 3/4" ....1"
    TIR Eccentricity:... 0.008 ..0.010 .0.010... 0.016
  • Flatness and Straightness:
    It should be remembered that flatness and straightness tolerances deal with bowonly and should not be confused with surface irregularity.Tolerances for flatness and straightness are 0.003---0.0055"/1"and depend on alloy and configuration of casting.
  • Radii:
    General Tolerance:+0.016"/1"
    Limit Tolerance: +0.005"/1"
  • Angular Tolerance:>=0.50
  • Roundness:Diameter: 2/1" ....1" .....1/12"
    Roundness Tolerance TIR: 0.010...0.016... 0.024
    Allowable tolerance after corrective action:
    External Diameter:.........2/1" ....1" ...1/12".......2"
    Roundness Finished TIR:...0.006 ..0.008 ..0.010 ...0.015
  • Hole Tolerance:
    Best tolerances for holes are as follows:
Hole Diameter
Limit Tolerance
~ 0.25"
0.003"/1"
~ 0.5"
0.004"/1"
>0.5"
0.005"/1"

These tolerances apply to round holes, D-holes and square holes.
Tolerances on hole centers should conform to the following limit.

  • Recommended Tolerances:

For all functional dimensions, the linear tolerance table below should be used.
For non-functional dimensions, wider casting tolerances will result in a more economical design.

Inches

Millimeters

Dimensions Tolerance Dimensions Tolerance
0.250 .005 3 .0100
0.250-0.500 .006 3-6 .0125
0.500-0.750 .007 6-10 .0150
0.750-1.250 .008 10-18 .0180
1.250-1.750 .010 18-30 .0215
1.750-2.500 .012 30-50 .0260
2.500-3.500 .015 50-80 .0310
3.500-5.500 .018 80-120 .0370
5.000-7.000 .020 120-180 .0435
7.000-10.000 .024.003 180-250 .0500.076
>10.000 <0.06 >250 <.15
  • Wall Thickness Dimension Tolerance is exceptional, conforms to Chinese HB6103----86 CT4

Configuration Dimension:
Not more than 500mmX400mmX400mm
Materials: Aluminum Alloy, Copper Alloy, Ni-base Alloy, Co-base Alloy, Stainless Steel and Other Steels.

Metallurgical Quality Standards:
American IC, MIL, Chinese HB963-90 and other Standards. Castings should? be used at the request of customers.

 
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