After detail inspection of the 3 finger chuck, looks like one of the finger in the chuck is out of alignment a bit.
Mujur I have found the receipt.

use the miwaukee batt hammer drill yesterday. didnt note down the model but it work like a charm drilling tru a zinc plate - mortar - brick with a mansory bit.

too bad didnt have a chance to drill on concrete.

anyone know where i can go and look see miwaukee power tools.
cheers folks.

so far all my bosch powertool has no such issue....maybe there is a little but it not obvious ..

no harm send it back to bosch for checking.

Quote from bosch representative from their forum...
There will be a very small amount of movement with the chuck both backwards & forwards as that is needed for the impact/hammer action and because of this there will also be movement in all directions. However there is a tolerance to what is acceptable. It does vary slighty from machine to machine.

Anyway, need your guy's opinion on this. I have a Dremel 4000, a plunge router attachment with modified length of the rod as to convert a hobby power tool to a semi pro power tool. Apparently this way does not work on cutting MDF straight. So now am thinking getting a real pro power tool for the right job. Jigsaw sure out of topic as it won't give a real straight cut. Left with circular saw which I'm thinking to get. But would like to convert it to a fixed saw as this is the only way to get real straight cut.
Any idea for this? Thanks.

Did further testing on all my drill bits after work today.
Seems like not all drill bits will wobble.
Looking at the picture, those bits at the right wobbles while those at the left is stable or wobble a little only.
most 4mm drill bits wobble except 1.
Hmm...I think the drill is ok, just the drill bits. I don't have smaller size(less than 4mm) bits to test.
[attachmentid=7063122]

Yup, target will be circular saw. Just that need to see ways to convert it, or at least adding some metal plates to have adjustable straight guide.
Trust me, when dealing with harder wood, jigsaw are pretty useless.
Converting circular saw do post high risk, that's why adding metal guide on it will be safer, since I'm still using it on the proper way.

On the side note, I won't be getting cordless circular saw, wired will be the better option for me. Using Dremel to cut hard wood by breaking 2 drill bits tells me that power is everything.

Those drill bits I accumulated over the years, got china bundle bits, B&D, wolfcraft and bosch.
The ones I used the most are 5 and 6 mm.

Well, 2 of the bits that wobble are from Bosch, 4mm and 10mm.

If use 18V I think will have enough power to cut hard wood.
Later when I make my workbench with resak wood I plan to cut with my 18v jigsaw.

A GKS 235T that requires 2000W wired cost you rm880.
While an entry level Bosch cordless cost you rm4** or the 18V cost rm1***.
Also the motor speed also matters, especially when you need to cut MDF or HDF, cutting wood actually requires more power than cutting metal.

Walauweh so cheap... Big seller like amazon really have huge purchasing/nego power.

Shipment I got proxy warehouse in California to consolidate, just the DHL cost is a lot..

Amazon ship to Malaysia? For this circular saw how much do you reckon the shipping cost is?

Well, for that circular saw, shipping costs = cost of the saw. 
Amazon prime day is today, see amazon prime day got crazy 30% discount or not.

Hi,

Do you guys do dust collection when cutting/routing/sanding?
I plan to convert my small room into a woodwork room. Worry about dusts flying around. Room is small at about 8' x 10'.
Saw some cyclone collectors in aliexpress, quite interesting.

Better do it open air, even you are using the world most expensive dust extractor, it won't remove 100% most of the time.
Wear proper dust mask(avoid those 3M cheapo mask) and safety spec are the best way to go with it.

http://www.chinabestprice.com/wholesale/Co...irator-548.html
Most pariah type also is the first 3.
Yup, you are right, then as time goes by, you lost your hearing and getting lung cancer.

Mine is home DIY and small woodworking only. Not hardcore production type.
Doing in a room has the benefit of aircond.

RM150 is just the cyclone cone from aliexpress, you need to add the vacuum blower and dustbin to make it work.
Want high quality air can even add HEPA filter lol...

The cyclone's function is to collect larger wood dusts first before the air goes to your vacuum cleaner.
Normal home use vacuum cleaner not durable enough to handle too many wood dust.