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Technical Information

Investment Casting Process Material Selection Design Guidelines

1. Linear dimensional tolerances:

Nominal Dimension (mm)		Length/Width/Height (mm)						Center Line Distance (mm)
Nominal Dimension (mm)		D1		D2		D3		D1	D2
from	to	Tolerance	Range	Tolerance	Range	Tolerance	Range	Tolerance	Tolerance
0	6	± 0.10	0.20	± 0.08	0.16	± 0.06	0.12	± 0.25	± 0.16
6	10	± 0.12	0.24	± 0.10	0.20	± 0.06	0.12
10	14	± 0.15	0.30	± 0.12	0.24	± 0.09	0.18
14	18	± 0.20	0.40	± 0.14	0.28	± 0.09	0.18
18	24	± 0.25	0.50	± 0.17	0.34	± 0.12	0.23	± 0.32	± 0.20
24	30	± 0.30	0.60	± 0.20	0.40	± 0.14	0.27	± 0.32	± 0.20
30	40	± 0.37	0.74	± 0.25	0.50	± 0.17	0.33	± 0.50	± 0.30
40	50	± 0.44	0.88	± 0.30	0.60	± 0.20	0.39	± 0.50	± 0.30
50	65	± 0.52	1.04	± 0.38	0.76	± 0.23	0.46	± 0.71	± 0.45
65	80	± 0.60	1.20	± 0.46	0.92	± 0.27	0.53	± 0.71	± 0.45
80	100	± 0.68	1.38	± 0.53	1.06	± 0.30	0.60	± 0.91	± 0.60
100	120	± 0.76	1.52	± 0.60	1.20	± 0.33	0.66	± 0.91	± 0.60
120	140	± 0.84	1.68	± 0.65	1.30	± 0.36	0.71	± 1.15	± 0.85
140	160	± 0.92	1.84	± 0.72	1.44	± 0.38	0.76
160	180	± 1.02	2.04	± 0.80	1.60	± 0.42	0.81
180	200	± 1.12	2.24	± 0.88	1.76	± 0.43	0.86	± 1.80	± 1.00
200	225	± 1.28	2.56	± 0.95	1.90	± 0.47	0.93
225	250	± 1.44	2.88	± 1.05	2.10	± 0.51	1.02
250	280	± 1.64	3.28	± 1.15	2.30	± 0.56	1.12	± 2.20	± 1.25
280	315	± 1.84	3.68	± 1.25	2.50	± 0.63	1.26	± 2.20	± 1.25
315	355	± 2.10	4.20	± 1.40	2.60	± 0.71	1.42	± 2.60	± 1.60
355	400	± 2.40	4.80	± 1.60	3.20	± 0.80	1.60	± 2.60	± 1.60

Note:

D1: for general dimension tolerances
D2: for some important dimensions requiring close tolerance.
D3: for some special dimensions requiring tightest tolerance.

2. Angular tolerance:

3. Flatness tolerance:

Dimension (mm) Normal Premium

0-25 0.2 0.1

25-50 0.4 0.2

50-100 0.6 0.3

100-150 0.8 0.4

4. Holes design tips:

5. Wall thickness: 2mm (1mm is achievable for certain small area;

6. Surface roughness: Ra6.3 minimum. For better finish, we offer polishing service.

7. Cast weight: 50KG max

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Tel: +86.532.68972380 Fax: +86.532.68972380
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