Products - Casting Reference Data 1. Linear Tolerance (mm) Dimensions (mm) 10 10 25 25 50 50 75 75 100 100 150 150 200 200 250 250 Normal (mm) 0.15 0.25 0.35 0.50 0.65 1.00 1.50 1.80 1.00% Premium (mm) 0.10 0.15 0.25 0.40 0.50 0.75 1.00 1.20 0.60% 2. Angle Tolerance 3. Surface Roughness (Ra/um) Rough Castings Weight>5kg, Main Wall Thickness>12mm 3.2-6.3 The surface finish for the castings we can provide with are as the following. Blacking, zinc plating, chrome plating and nickel plating for the carbon steel and the low alloy steel castings Tumbling, hand dull polishing, mirror polishing, electrolytic polishing and passivation treatment for the stainless steel castings and sand blasting, including glass beed blasting, corundum-sand blasting and quarlz-sand blasting for all the steel castings. Weight>5kg, Main Wall Thickness>12m m 1.6-3.2 Finished Castings 0.8-1.6 4. Limit Dimension for Cast Holes and Slots Items Hole Diameter(? mm) L / D ?2 ?3 L / D 1 ?4 ?7 L / D 2 ?8 L / D 2.5 ?2 ?3 L / D 2 ?4 ?7 L / D 4 ?8 L / D 5 5. Size and Weight Range Items Max Min Best Outline Dimension(mm) 1000 300 300 20 10 10 150 100 100 Weight (Kg) 40 0.015 0.2 5 Min. Wall Thickness(mm) 1.0 5 15 6. Frame design advice: