Yes I often use 4" because they're able to get into small spaces and are not so subject to awkward gyroscopic forces of the 125mm and particularly the 800mm ones.
I have had a Ryobi corded 100mm grinder for about 12 years which only recently burnt out. I also bought one of the cheapie Ozito grinders from Bunnings which only lasted a couple of months under the same usage profile as the Ryobi. Unfortunately I replaced the old Ryobi 100mm with a new Ryobi 100mm corded, only to find that the cutting disk safety shield is now held on with an over-centre clamp placed on the cutting side of the shield. This placement of the clamp inhibits the depth you can cut with the blade, so you have to remove the shield for tight spaces or waste a lot of the disc and use a new one.
All my other tools are Makita and I'd probably go with that next time, of course after checking the safety shield clamping arrangement.
Bookmarks