BLUE DIAMOND Auger Bits

Blue Diamond Auger Bits are engineered for demanding drilling sites, delivering dependable performance in heavy soils, clay, frozen ground, fracturable rock, asphalt, and compacted soils. With a 4' standard length and hardened components, these bits are built to endure tough jobs and deliver precision bores over time.

Features

Four specialized families: Heavy Duty Bits (fabricated boring head, hardened bolt-on teeth, hardened fishtail point, 4' length, heavy double flighting, 2" hex drive); Heavy Duty with Cast Head Bits (cast steel boring head, hardened drive-in teeth, hardened fishtail point, 4' length, 2" hex drive); Rock Bits (drive-in carbide bullet teeth, solid rock and concrete capability, ¾" thick boring head, 4' length, 2" hex drive, minimum down pressure for best results); Tree Bits (tapered version of the Heavy Duty bit for large-diameter bores, 4' length, 2" hex drive, heavy double flighting).
Standard length and drive: All models feature a 4' standard length and a 2" hex drive for broad compatibility with common boring rigs.
Durable construction: Hardened fishtail points and hardened teeth (bolt-on or drive-in, depending on model) maximize wear resistance in tough soils.
Rock-ready option: Rock bits offer carbide teeth for enhanced penetration through solid rock and concrete, with a ¾" thick boring head for added rigidity.
Cast head option: Cast steel boring heads in select models provide robust durability for repeated, heavy-duty use.

Benefits

These auger bits are designed to help professionals complete challenging borings with confidence and efficiency. Key benefits include:

Versatility across ground conditions: Whether you’re digging in moderate soil, heavy clay, frozen ground, fracturable rock, or asphalt, there’s a Blue Diamond bit tailored to the task.
Enhanced durability: Hardened teeth and points, plus cast or fabricated heads, reduce wear and extend service life in demanding environments.
Improved drilling performance: Heavy double flighting on many models promotes better chip evacuation, reducing stalling in dense soils.
Rock-specific capability: For solid rock and concrete, choose rock bits with carbide teeth and a thick boring head to maintain penetration and stability under higher loads (minimum down pressure around 3000 lbs for optimal performance).
Professional-ready flexibility: The standard 4' length and 2" hex drive fit a wide range of rigs, making these bits suitable for fence posts, utility bore holes, pilings, and other industrial applications.

Who this is ideal for: Professional drill operators, utility contractors, and landscapers tackling tough bore jobs, from large-diameter Tree Bits for expansive bores to compact 4" and 6" Heavy Duty Bits for routine installations.

Practical tips: - Match the bit type to ground conditions: use Rock Bits with carbide teeth for solid rock and concrete; opt for Cast Head or fabricated Heavy Duty Bits for clay, frost, or compacted soils. - Ensure your rig can apply sufficient down pressure on rock work to maximize penetration and minimize wear (rock bits typically benefit from higher contact force). - For large-diameter bores, Tree Bits offer a tapered option that maintains performance while enabling bigger holes over the same 4' working length.

PART NUMBER	MODEL	WEIGHT
HEAVY DUTY BITS	—	—
105105	4" Diameter, Heavy Duty, W/2" Hex	37 lbs
105110	6" Diameter, Heavy Duty, W/2" Hex	45 lbs
105115	8" Diameter, Heavy Duty, W/2" Hex	76 lbs
105120	9" Diameter, Heavy Duty, W/2" Hex	85 lbs
105125	10" Diameter, Heavy Duty, W/2" Hex	100 lbs
105130	12" Diameter, Heavy Duty, W/2" Hex	113 lbs
105135	15" Diameter, Heavy Duty, W/2" Hex	132 lbs
105140	16" Diameter, Heavy Duty, W/2" Hex	136 lbs
105145	18" Diameter, Heavy Duty, W/2" Hex	166 lbs
105147	20" Diameter, Heavy Duty, W/2" Hex	182 lbs
105150	24" Diameter, Heavy Duty, W/2" Hex	210 lbs
105155	30" Diameter, Heavy Duty, W/2" Hex	278 lbs
105160	36" Diameter, Heavy Duty, W/2" Hex	372 lbs
HEAVY DUTY WITH CAST HEAD BITS	—	—
105205	6" Diameter, Cast Head, W/2" Hex	45 lbs
105208	8" Diameter, Cast Head, W/2" Hex	90 lbs
105210	9" Diameter, Cast Head, W/2" Hex	98 lbs
105215	10" Diameter, Cast Head, W/2" Hex	113 lbs
105220	12" Diameter, Cast Head, W/2" Hex	128 lbs
105225	15" Diameter, Cast Head, W/2" Hex	139 lbs
105230	16" Diameter, Cast Head, W/2" Hex	167 lbs
105235	18" Diameter, Cast Head, W/2" Hex	204 lbs
105237	20" Diameter, Cast Head, W/2" Hex	231 lbs
105239	24" Diameter, Cast Head, W/2" Hex	272 lbs
105241	30" Diameter, Cast Head, W/2" Hex	312 lbs
105243	36" Diameter, Cast Head, W/2" Hex	430 lbs
105245	42" Diameter, Cast Head, W/2" Hex	460 lbs
105250	48" Diameter, Cast Head, W/2" Hex	550 lbs
ROCK BITS	—	—
105305	4" Diameter, Rock, W/2" Hex	70 lbs
105310	6" Diameter, Rock, W/2" Hex	66 lbs
105320	9" Diameter, Rock, W/2" Hex	102 lbs
105330	12" Diameter, Rock, W/2" Hex	134 lbs
105340	16" Diameter, Rock, W/2" Hex	203 lbs
105345	18" Diameter, Rock, W/2" Hex	201 lbs
105350	24" Diameter, Rock, W/2" Hex	291 lbs
105355	30" Diameter, Rock, W/2" Hex	340 lbs
105360	36" Diameter, Rock, W/2" Hex	395 lbs
TREE BITS	—	—
105405	18-9" Diameter, Tree, W/2" Hex	120 lbs
105410	24-12" Diameter, Tree, W/2" Hex	198 lbs
105415	30-15" Diameter, Tree, W/2" Hex	264 lbs
105420	36-18" Diameter, Tree, W/2" Hex	302 lbs
105425	42-18" Diameter, Tree, W/2" Hex	432 lbs
105430	48-24" Diameter, Tree, W/2" Hex	449 lbs

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