Kaimana
Plastic
- Joined
- May 20, 2022
I'm a boatbuilder who does all his own stainless steel fabrication. I TIG weld parts, drill them, occasionally put something on a lathe or milling machine. I just ran into an exceptionally hard batch of 316L that burned my big HSS bits: 5/8", 3/4" and 1". So I bought M42 bits from Drill Hog on eBay, and they worked GREAT! Several holes through 1/4" to 3/8" plate and the bits still sharp enough to shave with when done. Well, almost.
Got a little money in, and decided to buy an index full of M42 bits, just to have in the shop. Then I started reading the Amazon and eBay reviews and was surprised to find that every single ONE of the manufacturers: Irwin, Milwaukee, Bosch, Drill Hog, the Chinese seller BeHappy drills, DeWalt, Viking, Norseman, Drill America, Chicago Latrobe, had numerous "one-star" reviews from several users each who said the drills were crap.
I discounted the one-star reviews who said they broke drills, because they were using them in a battery-powered drill motor and those are unstable; easy for an amateur to snap a hard and brittle drill like an M42 cobalt bit. But many of the users were experienced professional machinists who were using the bits in drill presses with vises or work tables so the work was held down solidly. They complained of burning bits up. What the heck??
These guys know to use lubricant/coolant and how to run the equipment. I couldn't understand it, and I got frustrated because I couldn't find a single manufacturer that had NONE of these ratings. As best as I can tell, everything is made in China now; with more or less oversight and quality control from the American companies who are "making it in America". My guess is that some batches come out fine, and some just pour from the wrong pot of steel back at the smelting works.
Does anyone have anything definitive about this to say? How do you GUARANTEED get real M42 HSS bits? I broke down and bought a set of Irwin M42 bits on eBay, because they had a 30-day return, and the guy's reputation is on the line from the feedback. If I get drills that burn up, I'll write him a real nice email and send the stuff back. But that doesn't get me any REAL M42 bits. Anyone?
With Warm Aloha, A Boatbuilder in Hawaii
Got a little money in, and decided to buy an index full of M42 bits, just to have in the shop. Then I started reading the Amazon and eBay reviews and was surprised to find that every single ONE of the manufacturers: Irwin, Milwaukee, Bosch, Drill Hog, the Chinese seller BeHappy drills, DeWalt, Viking, Norseman, Drill America, Chicago Latrobe, had numerous "one-star" reviews from several users each who said the drills were crap.
I discounted the one-star reviews who said they broke drills, because they were using them in a battery-powered drill motor and those are unstable; easy for an amateur to snap a hard and brittle drill like an M42 cobalt bit. But many of the users were experienced professional machinists who were using the bits in drill presses with vises or work tables so the work was held down solidly. They complained of burning bits up. What the heck??
These guys know to use lubricant/coolant and how to run the equipment. I couldn't understand it, and I got frustrated because I couldn't find a single manufacturer that had NONE of these ratings. As best as I can tell, everything is made in China now; with more or less oversight and quality control from the American companies who are "making it in America". My guess is that some batches come out fine, and some just pour from the wrong pot of steel back at the smelting works.
Does anyone have anything definitive about this to say? How do you GUARANTEED get real M42 HSS bits? I broke down and bought a set of Irwin M42 bits on eBay, because they had a 30-day return, and the guy's reputation is on the line from the feedback. If I get drills that burn up, I'll write him a real nice email and send the stuff back. But that doesn't get me any REAL M42 bits. Anyone?
With Warm Aloha, A Boatbuilder in Hawaii