Author Topic: What tolerance in dimensions should allow from the manufacture?  (Read 502 times)

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Offline Jparis1138

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What tolerance in dimensions should allow from the manufacture?
« on: Sat, 06 February 2021, 16:15:20 »
I am about to send my design to a manufacturer, but Iím not sure what tolerance I can allow in my design . Iím especially worried about the screw holes as Iím not sure how precise the dimensions need to be for the screws to fit. If anyone can help Iíd be really thankful.

Offline nevin

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Re: What tolerance in dimensions should allow from the manufacture?
« Reply #1 on: Sat, 06 February 2021, 19:16:50 »
Ask that manufacturer your planning on sending it to.
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Offline xudongz

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Re: What tolerance in dimensions should allow from the manufacture?
« Reply #2 on: Tue, 09 February 2021, 12:55:58 »
It depends on what you're getting manufactured (PCB, CNC, laser cutting, etc). If the manufacturer needs to tap screw threads for CNC, you'll likely need to provide them with a technical drawing with details on what/where to tap.

If you don't need threads but only need the screw to fit through, you can do something like 3.1mm holes for M3 screws based on the manufacturer's specified tolerance.
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Offline Leslieann

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Re: What tolerance in dimensions should allow from the manufacture?
« Reply #3 on: Tue, 09 February 2021, 22:05:56 »
Laser and water also have kerf to deal with (beam spread).

There are charts that tell you the proper dimension for screw holes prior to tapping.
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