![]() I suspect that China is making some mag drills that are similar. I've used it about 30 times and it works just fine and hasn't tried to kill me like the high end drill did. So soured on high end core drills, I bought a $300 core drill to drill a couple of 4" holes through 6" reinforced concrete. Clutch didn't work on the brand new rental drill and it about broke my wrists / arms / collar bone. Holding force (also called drill-point breakaway) is calculated against a 1' thick steel plate. These drills also have a valve to adjust coolant flow. The local rental place rents expensive high end Husquavas. The electromagnetic base attaches to flat ferrous surfaces (such as steel and cast iron). I also pleasantly surprised myself with China special core drill on Amazon a few years ago. I have a Hougen HMD904 and it would be more than adequate for the job. And you get the primal feeling of POWER when you pull down hard on the handle and hear the motor slow down a little. In my time with mag drills, it usually takes longer and more effort to get the drill positioned than to drill the hole. I think 150 7/16" holes through 3/4" is going to go quickly and not need power feed. P.S., do get a unit that takes annular cutters (3/4 weldon spindle), and a auxiliary Jacobs chuck, so that you can use the slugger bits in the future when drilling larger holes! I don't have a specific brand/model recommendation but make sure it has the upward travel to fit the chuck and the 7/16 twist drill. It would make sense is if you were set up drilling larger holes with a mag drill, and had a few 7/16 to do as well. I don't know what size the slug is on a 7/16 slugger, but it can't be much more than 1/4 or so, meaning you are saving the effort of drilling a 1/4" hole. Great prices & free shipping on orders over 50. Annular Cutter Set 6 Pcs, Weldon Shank 3/4, Cutting Depth 1, Outside Diameter 1/2 to 1-1/16 Inch, Mag Drill Bits Kit for Magnetic Drill Press by S&F STEAD & FAST 4. that advantage is basically lost under 1/2", and they cost a lot more too.Īs a way of visualizing the work savings, the size of the slug is a good guide. Order Euroboor Twist Drill Bits For Magnetic Drills, 3/4 Weldon Shank, 1/4 x 1, SSPI.1/4 at . Most Popular Mag Drill Hidden motor cord Lower overall height Pilot Light Positive slug ejection Many accessories are available for a portable machine shop including: drill chucks, tapping, countersink, and more. The big advantage of annular cutters is they remove less metal for a given size hole than a twist drill, and take proportionately less feed pressure. the annular cutter will dull really quickly on scale or rust, and resharpening one isn't nearly as easy as is a twist drill. Stop fumbling around looking for the right bit, your cutter set will be well organized.You really don't want to use an annular cutter if you are drilling hot rolled or rusty plate at 7/16. It features a comfortable handle, allowing convenient transportation and quick classification. Compact Portable Case: The package comes with a carrying case. ![]() They have multiple cutting edges for ply-cutting and lower friction, allowing them to reach a high level of performance for chips' removal. ![]() The biggest advantage of annular bits is the ability to re-sharpen and then obtain smooth holes. 2 Pilot Pins & Unique Design: Two pilot pins help locate the center of a hole's location.All with 2 inch cutting depth allow you to create holes in most common sizes. Results 1/2' Round Chuck Annular Cutter Adapter with 3/4' Shank - for Drill Press and Milling Machines 45 50+ bought in past month 4497 List: 49. Premium M2 Steel: Our mag drill bits are made of M2 high speed steel for maximum durability and wear resistance, high efficiency, and superior service life.Applicable materials include various metals and plastics: aluminum, brass, stainless steel, pipe, etc. High Compatibility: The annular cutter set features a 3/4" Weldon shank and it is compatible with almost all major brands of machine tools.
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