Can You Drill Wear Resistant Steel…Even QT PLUS?JADCO • Rich F.
A recent customer commented about drilling holes through JADCO QT-PLUS.
It reminded us, that others likely have the same question or experience. When asked how his project was progressing, Ron C’s immediate answer was…
“I can tell QT-PLUS ® is way harder than my old wear plate, it just ignores drill bits.”
Please remember, you can absolutely drill and even tap JADCO QT-PLUS ® even though the hardness is 500 BHN.
You simply need to follow the correct procedures.
Here are a few things you should never do with QT-PLUS ® , and her are a few tips on how to get great results fast when making holes.
A good rule is using the same RPMs as drilling stainless steel, or half the rotational speed you use on mild steel. If you try to use a high-speed/air drill, causing the drill bit to overheat, and your QT-PLUS ® steel to work harden. Doing this makes it difficult to drill holes.
or twice the pressure/feed rate as if you are drilling mild steel. If you apply only light pressure, again the QT-PLUS ® material will work harden. This makes it difficult to drill holes effectively.
Start out with the correct sized bit for the hole you need to create. All drill bits are designed to cut with the full cutting edge. Do not step drill – starting with a smaller diameter drill bit and re-drill the same location using an increasingly larger drill bit each time. If you need a ½” hole and first drill a ¼” hole, and follow it with a ½” drill bit; the QT-PLUS ® will likely damage the ½” drill bit, chipping your drilling edge. Always use the proper size bit at the start, to save yourself time and money.
JADCO QT PLUS ® is an industry leading impact and abrasion resistant plate.
QT PLUS ® will fight back and will quickly ruin your punch tip.
With the high quantities of Nickel, Chrome, Moly, Boron and Titanium alloys in JADCO QT PLUS ®, the magnetic base drill will create highly magnetic areas that will create significant problems when welding. These magnetized areas are retained long after you finish welding. This causes your welding arc to dance around, making a proper weldment nearly impossible.
Here is a photo of a shattered punch that failed when trying to punch a hole through ¼” JADCO QT-PLUS ® through hardened wear plate.
Thankfully no one was injured from sharp metal fragments flying through the shop.
If your current wear plate vendor says you can use a punch press on their steel, it guarantees your current wear plate IS NOT HARDENED all the way through the steel.
Here are Tips For Successfully Drilling Holes In Wear Plate.