Stamping and forming processes
What tolerances can metal stamping achieve?
Answer
Can tighter tolerances be achieved with a secondary operation? A pierced or drawn feature can be brought into tolerance afterwards by coining/calibration in the die, or by CNC turning, milling or grinding where the geometry allows. The trade-off is cost per part, and the review will show both options. Do these reference values apply to stainless steel and aluminium too?
Sources
- Sheet Metal Stamping Tolerances & ±0.01 mm LimitsCan tighter tolerances be achieved with a secondary operation? Often yes. A pierced or drawn feature can be brought into tolerance afterwards by coining/calibration in the die, or by CNC turning, milling or grinding where the geometry allows. The trade-off is cost per part, and the review will show ...
- Sheet Metal Stamping Tolerances & ±0.01 mm LimitsBalford's Metal Components Expertise Deep Drawing Sheet Metal: Precision Components What is metal stamping? Design Guide: Double-Sided Chamfered Circular Washer Design Guide: Stamping Washers Automotive Motor Housing Manufacturing via Deep Drawing Reference Tolerances for Stamped and Deep-Drawn Part...
- ISO 2768 General Tolerances: The m, f, c and v ClassesISO 2768 is a two-part standard for general tolerances: the tolerances that apply to dimensions on a drawing which carry no individual tolerance of their own. Part 1 covers linear and angular dimensions and defines four classes, f for fine, m for medium, c for coarse and v for very coarse; the class...
- Sheet Metal Gauge Chart - Gauge to mm and inchTwo other traps come with the number. A gauge is nominal: the mill tolerance on cold-rolled sheet is not zero, so a "1.2 mm" coil can arrive a few hundredths either side of 1.2 mm. And gauge says nothing about the material condition or the direction of the strip, both of which affect how the part fo...
- Metal Stamping Tolerances: Reading A Drawing Before QuotingMetal Stamping Tolerance Standards: How To Read A Drawing Before Quoting Which tolerances a stamping tool can hold, which ones need machining, and how to read a drawing so the quote matches the part you actually need. Most quotation arguments are tolerance arguments in disguise. A drawing that appli...
- Surface Finish Chart: Ra 0.08 µm in MachiningHome › Blog › Metal Stamping Services Engineering Data · Surface Finish Surface Finish Chart: What Ra Value Comes From Which Process Published October 1, 2026 · Balford Technical Team Ra is the number on the drawing, and it is also the most over-specified number on the drawing. A bl...
What an engineer still needs from you
- material and material condition (grade, temper)
- material thickness, plus the key diameter, height and wall thickness
- tolerances, burr direction and the visual acceptance standard
- annual volume - it decides whether tooling is single-hit, progressive or transfer
- surface finish, and any secondary machining, annealing or plating
Need a DFM feasibility assessment for your project?
Send the engineering drawing (STEP or PDF) with the material grade, thickness and annual volume. Balford engineers then check it against the process window - draw ratio, wall thickness, tolerances, blank and tooling route - and come back with what is feasible and what is not. An answer on this page cannot replace that review.
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This page is an engineering answer, not a quotation and not a dimensional acceptance. It is generated from Balford's published material and held to the verified company fact sheet.