Hi. I'm Ted, from Everything Attachments. We're going to show you the HDF style of auger bit. They make two different styles that we mainly sell. The HDF is the most popular, and the HDC. I'm going to point out the main differences.
One is listed . . . I don't like the way they're listed in the book, because the HDF says for moderate ground, and that to me sounds like a medium-duty auger, where this is a very heavy-duty auger any way you look at it. The HDC is for abrasive ground, but as far as the main shaft, the collar, the welding, and the thicknesses, they're all the same. The same flighting goes on an HDC or an HDF.
This is an HDF, and it has the wisdom teeth and the gauge teeth. The gauge teeth is on the end and has a little wider spot; gives you more wearing room. The wisdom teeth go in the middle, and they're spaced so everywhere there's a gap it's picking it up over here. They're spaced so you get a full, clean bottom all the way to the bottom, and it has a fishtail point that's also replaceable in the end. The difference between a HDF and a HDC is from here down, this is made out of all steel, and it's fabricated and welded, and the teeth are bolted on. On an HDC, this head is meant for abrasive ground. Even though sand digs very easily, it's abrasive and it will wear these pieces down here quicker. An HDC, instead of being steel-
fabricated, it's a casted high-nickel, high-carbon head on the end of it and the teeth actually drive into a pocket, and there's no bolt that can wear. For 90% of what we sell, it's an HDF auger, and that's what this is. It's a really good heavy auger out of all the other brands that I've seen. McMillan pretty much invented the hydraulic auger to start with, and that's who we stick with because we've had the best results out of.
If you'll just give us a call at Everything Attachments, give us an email. There's different reasons why you pick different sizes of holes. If you're doing fence posts and you're only putting in a 4x4 post, which will measure about 6 inches across, then there's a difference between if you're going to tamp the dirt in or if you're going to cement it in, of what size bits you would want. If you just go with a real large bit and you're going to tamp this hole tight with dirt, it's going to take a long time to stabilize and be firm if you picked the wrong size bit. Depending on what you're doing, if you know if it's a round or a square and what size it is of what you're going to be putting in, just give us a call or an email and we'll help size this properly for you, whether you're putting it in with dirt or cement, there's different reasons why we pick different size bits.
Just give us a call. We'll be happy to help you, at Everything Attachments.
Auger extension 
