impact v regular

[Homesafe]

is there an advantage if i use an impact for screwing as other day watching Homes on homes and he was screwing bout 8' screws into joist etc. with ease,

my 18v makita would struggle with something like that.

 

[big-all]

the thing about impact drivers is they use the force in a rotary action
a normal strong drill will quote 40 nm tork[turning motion /power]an impact can muster 140nm -400nm of tork in other words 3 to 10 times the power to insert screws

 

[Thermo]

ive used a battery impact driver for driving in 10" timberlocks before. you wont do that with a hammer drill!

 

[Homesafe]

i'm getting one of those , but i use max 100mm 8/10 screws would a 12v be sufficient, they are much cheaper

 

[Thermo]

ive got a 14v and 2 18v ones. the 14v doesnt have the oomph or last long enough to do any serious work with

 

[JohnD]

I didn't understand that

I thought the idea of an impact drill was to bash the bit backwards and forwards to penetrate masonry, not round and round?

Wouldn't it mangle the screw heads as well?

 

[big-all]

ok the way they function they start rotating at full revs [2400 in the ryobi]
as the load increases there is a point [around say 400rpm]the rotational impacts kicks in literaly
its like a ratchet action for the sake off a better words its like an extra low gear where the energy on the rotation is stored up so if the screw moves after half a turn then the power output is doubled if it moves after 3/4 turn then you miltiply by 4
the power mutiplie fairly indefinatly up untill your on perhaps 10 rpm actual rotation at the tip on the largest possible screw where as the machine is still rotating at 400rpm and storing the energy for ultra short but powerfull kicks

yes you can chew up driver bits but not surprising when your applying 4 or 5 times the tork

clear as mud eeehhh

 

[Thermo]

i find providing i have the right size bit that the heads and the bits dont get chewed up. I did used to find that a lot of bits would simply shear. Since ive switched to using spax screws i dont get this problem now.

 

[1john]

the thing about impact drivers is that untill you own one you never knew that you needed one. Love mine and it is not the best, i have the concept, which also doubles up as a colleted screw driver. i cant seem to get a replacment bit for it either mind lol. you need to use quality bits in the impact driver though as they will chew and shear cheap bits.

 

[dpsservices]

ive got a 14v and 2 18v ones. the 14v doesnt have the oomph or last long enough to do any serious work with

i have the hitachi 14.4 volt impact good enough for me and they take a good beating

 

[Thermo]

the thing about impact drivers is that untill you own one you never knew that you needed one. Love mine and it is not the best, i have the concept, which also doubles up as a colleted screw driver. i cant seem to get a replacment bit for it either mind lol. you need to use quality bits in the impact driver though as they will chew and shear cheap bits.

i agree, ive switched to using the wera bits as well. seem to outlast the others.

dpsservices, i just found the 14 v one didnt hack it whjen we were doing big decks, alongside the 18v one. still a good bit of kit though (mine are hitachi too)

 

[dpsservices]

i use mine for building stages ect have 2 of them so that give me four battery's if needed, as someone said you don't realise you need one to you own one... one of the best investments i made tbh tool wise as use it everyday

 

[noseall]

I have just bought (an hour ago) a Milwaukee heavy duty 18v hammer drill/driver and the 18v impact driver.

Awesome.

The Makita had to go, as it used ni-cad batteries.

The new fella uses lithium-ion. No comparison.

 

[seaangler]

the thing about impact drivers is that untill you own one you never knew that you needed one. Love mine and it is not the best, i have the concept, which also doubles up as a colleted screw driver. i cant seem to get a replacment bit for it either mind lol. you need to use quality bits in the impact driver though as they will chew and shear cheap bits.

replacement bits for the collated driver should be available from anyone who sells the driver - look at about £3.45 each