can someone please help with hole dimensions

[reefy86]

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

cheers

Ash

[reefy86]

just to throw something in there would this make sense for you guys or does it look confusing :)

[Clive S]

just to throw something in there would this make sense for you guys or does it look confusing :)

I think you have too many measurements some are duplicated also the bottom 4 holes are drawn differently ie not showing the countersunk bit. I don't see the line down the centre holes sizes. If all the holes are the same size you can say that. Unless the holes tapped just say the hole size ie not M8 8.1 as a M8 hole would be 6.8mm to be tapped.

If hole are through holes I would say that instead of 30mm.

I would reference all the measurements from one end and one side. Do you really need 30mm plate?


Do you have a dxf file for this. If not I can do one for you.

[CharlieRam]

Just to add to what Clive says, I don't see any measurement for the actual position of the 4 and 8 grouped holes on the plate, try and pick two sides(Datums) to take the measurements from and maybe positional tolerances if its important to you. Also you don't need the length of the angled side, an angle would do.
Cheers, Charlie

[reefy86]

ahh yeah sorry i forgot about the position of the holes, as for the bottom 4 the reason why they are different is because the counterbore are on the opposite side. i do not have a dxf file as im new when it comes to drawing so that was actually my first drawing to show you guys lol.

cheers

Ash

[reefy86]

forgot to mention i want a close fit on the through holes so instead of 8.4mm i wanted 8.1mm thats what i meant to of said.

Ash

[komatias]

forgot to mention i want a close fit on the through holes so instead of 8.4mm i wanted 8.1mm thats what i meant to of said.

Ash

If you want alignment, use dowel pins or shoulder screws not plain screws. tightening the through holes will cause tolerance stackup issues.

[Clive S]

ahh yeah sorry i forgot about the position of the holes, as for the bottom 4 the reason why they are different is because the counterbore are on the opposite side. i do not have a dxf file as im new when it comes to drawing so that was actually my first drawing to show you guys lol.

cheers

Ash

Well then you have not said on the drawing which side is being countersunk. You have not mentioned 8.4mm only 8.1mm. If you say you want a hole for M8 it will probably end up at 6.8MM

So
1: Do you need 30mm ali
2: You don't need to say M8 just the hole size you want and whether it is through hole or to a depth
3: set all your measurements from two datum's ie bottom and one side.

[reefy86]

thanks guys, 30mm probably is ott what would you recommend for all round? i think i will stay with 30mm on the front z axis plate though but for everything else would 25 do? i know 20 is the minimum.

and with the holes so i just say 8.4mm through on plate 1 and 6.8mm tapped 15mm depth on plate 2?

Ash