Yes the weld will become hard and brittle. It’s diluted with the harder material from the cutter.Be wary of that weld by the way. I know what Richard said, but my experience has shown me that welding heat treatable materials can actually make the weld very hard and brittle
correct. great for thin materials I use them on steel trunking and electrical cabinets using cutting compound .use them on thicker materials ruins them even the quality onesWhat were you drilling Ashley? They are a sheet metal tool really.
Maybe 5mm steel...What were you drilling Ashley? They are a sheet metal tool really.
Yes the weld will become hard and brittle. It’s diluted with the harder material from the cutter.
However although the weld has become harder the heat from the weld can do a bit of annealing to the material the cutter it made from so the weld is harder than mild steel and the cutter can be softer than hss or whatever it’s supposed to be made off.
A squirt of lubricant can make a hole easier.Wiggle it a bit, seems to work in other situations......
I've got another 1/4" drive one & that's done plenty of holes, But never snapped like this one. But yes probably aimed at the DIY timber jobs.A 1/4" hex drive is not really man enough to take the torque required in cutting a 20mm hole in 5mm steel if it snatches in the material even in 2mm increments, OK in wood though which is likely the market they are aimed at with the 1/4" Snappy Drive.
What make were they & where did you buy them from?I bought 2 sets of 3 step drills - about £7 per set, one imperial and one metric. They've performed really well drilling a couple of these indexing discs in 5mm mild steel.View attachment 132770
I should have said that I pre-drilled with 6mm jobber before going through with the step drills to 12mm and 1/2". Benefit is they also edge-break nicely.
Imperial Set:
https://www.ebay.co.uk/itm/3pcs-Tit...4-Hex-Shank-/162566622179?hash=item25d9b9cbe3
Metric Set:
https://www.amazon.co.uk/gp/product/B017GYX72K/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1
Most probably going down the annular cutter route first!Ashley have a look at the sherwood ones I think they used to do them in a set of 3 from cromwells. About 50 pounds for the set. I'l see if I can find them.