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THUNDERBAY 4 Inch Diameter 36 Inch Long Earth Auger Bit with Fishtail Point, for Decks, Mailboxes, Fences, Tree Planting

Free shipping on orders over $29.99

$79.99

$ 35 .99 $35.99

In Stock

About this item

  • Features a replaceable fishtail centering point
  • Hardened steel, replaceable cutting blade
  • 4 inch drilling diameter
  • 7/8 inch drive will fit all Thunderbay, Earthquake, Dolmar, Echo, and Maruyama power heads
  • Rugged welded steel construction with extra heavy powedercoat paint finish



Product Description

TB Earth Auger

Features

Fish

Fishtail Point

THUNDERBAY Augers feature with helpful fishtail points, which make hole placement and starting easier.

Blades

Replaceable Blades

Earth auger blades will inevitably become dull. Our earth auger blades are simple to replace.

Bits

Durable Bits

Our earth auger bits are built to last, constructed from welded solid steel with a thick powdercoat finish.

spring

Shock absorbing Torque Coil

THUNDERBAY 6", 8", 10", 12" and 14" augers feature with the patent shock spring on the bit can help keep stability and absorb shock while in use

TB

Sheri Dryden
Reviewed in Canada on February 7, 2025
Fit perfectly on my gas powered ice auger and went through almost 3 feet of dirt for me to plant a sign, like nothing!!!!
Ancient Technology
Reviewed in the United States on September 14, 2024
My thunder bay bit is still shiny and new because I bought a second bit from another manufacturer when none of the adapters I bought would fit this bit. The pin while very strong is too thick to fit the adapter bits. Not having a working drill press at my disposal at the moment I was forced to rely on the market availability instead of just drilling one of the cheap ones out myself.So it's not a bad bit it's built very tough and for the money if they mated it with an adapter in the box that fit their pin it would be a perfect tool for those looking for an off grid small scale hole drilling rig that can cut a small hole in just seconds with almost no effort. If I manufactured this bit, I'd certainly be pairing this with an adapter to make this useful.Unfortunately because it is so hard to mate this to an adapter I have to recommend a pass on this tool to anyone who is not prepared to alter an existing cheap auger drill adapter. If you choose to buy it and don't have a drill bit there is an adapter out there but unfortunately I bought 7 of them to find the right one and I am not sure which one is the right one to buy. It was not the cheap one though I can tell you. It was one of the more expensive adapters. Somewhere in the $35 range I believe, there were several that look alike in that range from different brands.If you're that guy who has a bench and drill press at his disposal and you want to cut yourself a bigger hole in a cheap adapter go for it. This bit is designed to cut small holes in hard pack clay and gravel. This is one of 2 bits I found that are capable and available. It's a very capable bit if you can mate it and it's probably the better of the two available especially with different tip options.Again if you're not willing to alter a hardened steel auger adapter don't buy this you'll be stuck returning it or owning a bright shiny red garage ornament. Though it is very nice looking with that shiny red paint, it certainly brings an aire of sophistication to my garage floor.Time saver, no absolutely not, spent like 2 weeks trying to mate this tool. Ease of use 100% no sir. Built tough as hell though if you can actually drill a hole with it.
Antonio
Reviewed in the United States on August 12, 2024
Me gustΓ³ mucho.
Zed
Reviewed in the United States on October 10, 2024
Broke after one use. Also the pin isn't a pin and needs a special machine screw πŸ€”
TAnliker
Reviewed in the United States on July 16, 2023
Extremely quick shipping. It worked decent in the hard rock and Clay soil.
Steve Beneteau
Reviewed in the United States on May 27, 2023
works well for installing pipes in the ground
Danny
Reviewed in the United States on December 19, 2023
I liked the sturdiness of this bit. I like how it fit my gasoline powered auger. I used it to dig approx. 100 holes for Hazelnut seedlings. Great product.
BJ Spano
Reviewed in the United States on September 15, 2022
Product works great. It allows quick and easier start in hard clay soil whereby I can then change over to a larger auger bit to open the hole. Arrived on time. Happy with this product.
Kindle Customer
Reviewed in the United States on October 21, 2016
I bought this to help be get pilot holes for fence posts through a rocky tree rooted area that the 8" bit that came with my thunder bay auger just couldn't get through.The 4" worked like a charm. It turn a process that was taking days into process that took hours...I also bought the 6" bit and it works too.These are sturdy we'll made bits for a well made auger...
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