can someone please help with hole dimensions

[reefy86]

thing is though that really confuses me is when looking at the dimensions from zapp it just shows a diagram with an hole at 4.5mm, im not good at knowing what holes what but in solidwork i select m4 and it has a default settings at 10.10mm blind hole depth and 8.00mm tap thread depth.

[komatias]

Slightly confused myself here too. What are you trying to draw up, the rail or the mating part?

If it is the mating part:
That setting is fine if you want a threaded hole. It give you two full diameters worth of M4 thread. I am sure you know you cannot tap to the bottom of a blind hole so the 10.10 is pretty decent in my mind.

[Clive S]

thing is though that really confuses me is when looking at the dimensions from zapp it just shows a diagram with an hole at 4.5mm, im not good at knowing what holes what but in solidwork i select m4 and it has a default settings at 10.10mm blind hole depth and 8.00mm tap thread depth.

As have been said A 2D drawing is best and if you are asking for holes to bolt the rails to, through holes are much easier to drill and tap. As long as the hole centres are marked and dimensioned on the drawing that will be fine. You can just say drill for M4 or M5 or whatever size you want, the company would then drill the appropriate hole.

[reefy86]

forgive me for sounding dumb, so if i ask them to make an m4 hole will they know to tap it or will i have to tell them.

[reefy86]

its for the linear profile rails.

[komatias]

Never assume that the machine shop knows what you mean or need. You can however be as descriptive as you want. For example, you add an arrow to the threaded whole with a note leading from it saying: 24 X M4x0.7 8mm MIN FULL THREAD. DRILL POINT OPTIONAL TO DEPTH 12MM

[reefy86]

thank you :)

[Boyan Silyavski]

When i send to somebody some things to machine for me i do the following:
/thats how i like to receive also/

- on the 3 D drawing i group all same plate thickness objects at one plane and near each other and send each group as separate file.
The file is accompanied by another JPG snip which shows basic dimensiones, so when you take a glance you could see more or less what the job dimensions are.

-Each piece has detailed snip or even some times 5, with hole detailed explication, where tapped, where pass through, hole clearance, etc.


What i hate to receive is 15 separate files and i waste 2 hours to import them and check dimensions only to give a quote. When they are grouped i could import them at once and could judge material weight, hence price for a minute, not another hour.


if machining 5 parts that go together, i want also to see how they interact, so i always need also the assembly file with them. 99% of the files i have seen or have a design mistake, something not well thought or is done from people who dont have any idea how this will be mounted together in real life.
I have yet to see something that does not need any correction. dealing with fellow DIY crowd i mean.

[reefy86]

thank you that makes alot of sence to do it that way tbh and feels natural.

cheers

Ash