Large-diameter auger bit engineered for deep, wide holes — perfect for posts, poles, trees, and heavy construction groundwork.
The BEFCO 18in x 48in Auger Bit – Double Flight | Fits 300–400 is a heavy-duty drilling attachment designed for use with the 300- and 400-series of BEFCO MOLE post-hole diggers. It’s purpose-built for demanding tasks such as setting large fence posts, structural poles, vineyard or orchard posts, and planting sizable trees — anywhere you need a robust, wide-diameter hole.
Featuring a full 18-inch diameter and a generous 48-inch length, this auger bit enables you to dig deeper and wider than standard bits. Its **heavy-duty double-flight design** helps lift and eject soil efficiently, reducing clogging and speeding up hole digging even in compact or damp ground. With fully welded flighting, a reinforced mounting collar, and replaceable knives and point, this auger is built for long-term durability and minimal maintenance — ideal for contractors, farmers, landscapers, and construction crews doing repetitive, heavy-duty digging jobs.
Extra-Large 18″ Diameter & 48″ Length
This size delivers wide, deep holes suitable for large posts, poles, or structural supports — ideal when standard augers aren’t enough.
Double-Flight Spiral Flighting (1/4″ Thick)
Dual spirals lift soil out effectively and minimize clogging, making digging faster and cleaner even in heavy or sticky soils.
Fully Welded Flighting & Reinforced Mount Collar
Built for rugged, repeated use — the welded construction and reinforced connection to the gearbox ensure strength and reliability under heavy loads.
Replaceable Knives & Standard Fish-Tail Point
Wear parts are serviceable, so cutting performance remains sharp over time — reducing replacement costs and extending tool life.
Compatibility with BEFCO MOLE 300 & 400 Series
Specifically made to fit the more powerful 300-512 and 400-512 post-hole diggers — ensuring seamless integration with the heavy-duty gearbox and PTO drive for optimal digging performance.
Built for High-Torque, Heavy Work
This auger is ideal for structural, agricultural, or landscaping jobs requiring large-diameter holes — from posts and poles to tree planting and vineyard work.
Compatible Models
BEFCO MOLE post-hole digger — 300 & 400 Series
Auger Diameter
18 inches
Auger Length
48 inches
Flighting
Double flight, fully welded
Flighting Thickness
1/4 inch
Standard Point
Fish-tail auger point, replaceable knives & point
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