Technical Resources

Free engineering downloads from a Dongguan ISO9001 factory: metal material equivalents, machining tolerance guide, DFM checklist, surface finish, weight and thread charts.

No match. Try 304, DIN or tolerance.

Metal Material Equivalents Chart: Worldwide Grade Cross-Reference

Cross-reference a metal across the world's main standards at once - USA (AISI/UNS), Germany (DIN), Europe (EN), UK (BS), France (AFNOR), Japan (JIS), China (GB) and Russia (GOST). Covers stainless steel, carbon and alloy steel, cast iron, aluminium, copper alloys, silver, gold, nickel, zinc, lead, tin, magnesium and ti...

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Machining Tolerance Guide: What Each Process Can Hold

Achievable tolerances by process - CNC turning, milling, grinding, EDM, bending, stamping and springs - plus common GD&T symbols and Ra surface roughness values.

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DFM Checklist for CNC, Stamping, Sheet Metal and Springs

A practical design-for-manufacturing checklist by process: corners, holes, wall thickness, bend radii and spring index, to cut cost and avoid rework.

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Surface Finish Guide: Ra Values, Anodizing, Plating and Powder Coating

Surface finish options for machined and stamped metal parts: Ra roughness values and a comparison of anodizing, plating, powder coating, passivation and blasting.

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Metal Density and Weight Chart for Machining and Stamping

Density table for steel, stainless, aluminium, brass and copper with weights per 100 x 100 x 10 mm block, plus the formula to work out any blank weight.

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Metric and Imperial Thread Size Chart for CNC Parts

Metric coarse and fine thread chart with pitch, tapping drill and clearance holes, plus common UNC and UNF sizes for machined and stamped parts.

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All sheets are free to download - no sign-up required.

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CNC machining · metal stamping · custom springs · heat sinks — ISO9001 source factory in Dongguan, China. Send your drawing, get a quote within 12 hours. Email sc@bquq.com | WhatsApp +86 13713157787

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