I need 4 holes on the wall for a bracket mounting, the 1st hole can be anywhere, but the 3 other holes need to follow the 1st hole and need to be extremely accurate or the screw will not fit, from my experience its difficult for me to drill the hole so accurate, can have only +- 1mm variance for mistake only for each hole.

How to make such accurate drilling ? drawing circle on the wall is easy, but once drilling starts, the drill bit will some how "move" a bit if certain part of the wall is harder, how to prevent the bit from "moving" ?

Lol

Use manual hand drill. The slower the drill, the more accurate u r.

use laser drill...

or do pilot drill

Use makita/bosch rotary hammer wont have problems with 'move a bit'.

Also new drill bit.

use punch tool 2 mark a small hole, y u no experience need a virgin help

This post has been edited by junsheng: Feb 2 2016, 11:39 PM

use punch tool 2 mark a small hole, y u no experience need a virgin help

This post has been edited by junsheng: Feb 2 2016, 11:39 PM

ingat drill benda lain...sigh

make a wood jig.. drill 4 holes with accurate location on it.. then drill the first hole to the wall.. and use the jig for the other 3 holes.

use a spirit ruler.



use this to level and mark ur holes.

during drill time, use a slower speed to mark the hole and then speed up and punch through

This post has been edited by bananajoe: Feb 2 2016, 11:41 PM

if u want to prevent the bit from moving,

just put masking tape on the wall.. when the drill tip hits it, it wont move all around.

use sniper scope

Take a nail and hit it at exact spot of the center of marking. The use small size drill to drill a small hole.
After that only drill the hole using the drill size that you wanted. You could skip that nail part also

image of punch tool



This post has been edited by junsheng: Feb 2 2016, 11:44 PM

Drill gun

Guna drill bit paling kici dulu adik.

just paku a small hole with a nail 1st la.. easy as ABC

tumpang ask , why i drill for wall plug screw, steel type , cannot hentam in , although the
drill already masuk the length i want ,

susah hammer in wall plug ,i keep drill many hole and it just eerytime hammer in , the nut or head spoil , either it is too hard to hammer in , or too loose ,



This post has been edited by DSEcomp: Feb 2 2016, 11:58 PM

+1

Bosch multi purpose drill bit not bad…you can get from ace hardware.

Btw, if ts scare 'move a bit' then use 5.5mm drill bit first instead of 6mm

you need the hole to be same size or slightly bigger than the "pipe" on the plug, and when hammer it in, loosen the nut, the hole need to be deep enough for the entire "pipe" plus the head of the screw to go in. i am installing these too, i purchased item that come with low quality anchor wall plug, and im changing them to something bigger, more reliable, its not that difficult to put them in. oh btw dont make the hole too big, or the wall plug will be useless.