Diameter
6 – 36 in
Models available
8 variants
Overall Length
48 in
Guaranteed Fit
Fast Shipping
Hassle-Free Returns
Description
🏭Made in USA since 1981
🔒1-year warranty
🔨Rockwell 65 hard-faced boring head
📘 Overview
The Star Industries 160A-R is the rock auger bit range — the most rugged auger Star builds, for solid rock, concrete, fractured rock, frozen ground and heavily compacted soil. Eight diameters run from 6 to 36 inches, all 48 inches overall length. From 8 inches up the bits use a bolt-in 1 3/4 inch shaft pilot, a reinforced 3/4 inch bottom flight boring head with Rockwell 65 hard facing, replaceable carbide bullet teeth and double flighting on a 3 1/2 inch high strength tube. The 6 inch bit uses a welded pilot with the same replaceable carbide bullet teeth. Bullet count rises with diameter, from 6 on the smallest to 30 on the 36 inch.
⚙ Key Features of the Star Industries 160A-R Rock Auger
- Eight diameters: 6, 8, 9, 12, 18, 24, 30 and 36 in, all 48 in overall length
- Replaceable carbide bullet teeth on every size
- Bullet count by diameter: 6 at 6 in, 8 at 8 and 9 in, 12 at 12 in, 18 at 18 in, 22 at 24 in, 24 at 30 in, 30 at 36 in
- 8 in and larger: bolt-in 1 3/4 in shaft pilot for field replacement
- 8 in and larger: reinforced 3/4 in bottom flight boring head with Rockwell 65 hard facing
- 8 in and larger: double flighting on 3 1/2 in high strength tube
- 6 in bit uses a welded pilot with replaceable carbide bullet teeth
- Standard 2 in hex drive; optional round drive by adding suffix B to the model number
- Designed for solid rock, concrete, fractured rock, frozen ground and compacted soils
- A solid rock auger and rock drilling auger for the hardest ground
- A carbide auger bit and skid steer rock auger on the same 2 in hex drive as the dirt bits
- The heaviest auger bit for skid steer drives in the Star range
- 1-year warranty on auger bits, made in the USA since 1981
🔑 Why Buyers Choose the Star Industries 160A-R Rock Auger
- Carbide bullet teeth cut rock instead of wearing against it — a steel dirt tooth glazes and stops cutting in the first few feet of rock. Carbide bullets chip material away and rotate in their pockets as they wear, which is why they last.
- Rockwell 65 hard facing goes where the bit dies first — the bottom flight takes the whole cutting load at the base of the hole. Hard facing that surface is the difference between a season and a week.
- The pilot bolts in from 8 inches up — the pilot is the first thing to go in rock, and a bolt-in 1 3/4 inch shaft pilot is replaced on site rather than sending the bit away.
- Double flighting on a 3 1/2 inch tube handles the torque — rock drilling puts far higher and more sudden torque through the stem than dirt, and a single flight on a light tube twists.
- Bullet count scales with diameter — 30 bullets on a 36 inch bit against 6 on a 6 inch, so the cutting load per tooth stays sensible as the outer edge travels further per revolution.
📊 Star Industries 160A-R Rock Auger Specifications
| Model | Diameter | Overall Length | Carbide Bullet Teeth | Pilot |
|---|---|---|---|---|
| 160A-R6 | 6 in | 48 in | 6 bullet | Welded |
| 160A-R8 | 8 in | 48 in | 8 bullet | Bolt-in 1 3/4 in shaft |
| 160A-R9 | 9 in | 48 in | 8 bullet | Bolt-in 1 3/4 in shaft |
| 160A-R12 | 12 in | 48 in | 12 bullet | Bolt-in 1 3/4 in shaft |
| 160A-R18 | 18 in | 48 in | 18 bullet | Bolt-in 1 3/4 in shaft |
| 160A-R24 | 24 in | 48 in | 22 bullet | Bolt-in 1 3/4 in shaft |
| 160A-R30 | 30 in | 48 in | 24 bullet | Bolt-in 1 3/4 in shaft |
| 160A-R36 | 36 in | 48 in | 30 bullet | Bolt-in 1 3/4 in shaft |
📋 Rock Auger Diameters at Checkout
| Option as shown at checkout | What you get |
|---|---|
| 6" Dia x 48" OAL | 160A-R6, 6 in diameter, 48 in overall length, 6 carbide bullet teeth |
| 8" Dia x 48" OAL | 160A-R8, 8 in diameter, 48 in overall length, 8 carbide bullet teeth |
| 9" Dia x 48" OAL | 160A-R9, 9 in diameter, 48 in overall length, 8 carbide bullet teeth |
| 12" Dia x 48" OAL | 160A-R12, 12 in diameter, 48 in overall length, 12 carbide bullet teeth |
| 18" Dia x 48" OAL | 160A-R18, 18 in diameter, 48 in overall length, 18 carbide bullet teeth |
| 24" Dia x 48" OAL | 160A-R24, 24 in diameter, 48 in overall length, 22 carbide bullet teeth |
| 30" Dia x 48" OAL | 160A-R30, 30 in diameter, 48 in overall length, 24 carbide bullet teeth |
| 36" Dia x 48" OAL | 160A-R36, 36 in diameter, 48 in overall length, 30 carbide bullet teeth |
🔗 Teeth, Pilots and Extensions for the 160A-R
Every 160A-R rock auger arrives with its carbide bullet teeth and pilot fitted. Wear parts are stocked individually: carbide bullet tooth 160A-T10, the tooth pocket 160A-112007 it seats in, the bolt-on bullet tooth pilot 160A-BT500S, and a bullet tooth puller 160A-112000 for changing teeth that have worn into their pockets. For deeper holes, fixed length shaft extensions are available from 24 to 72 inches, and the replacement 2 inch hex coupler is part 160A-112042A.
🚜 Which Auger Drives Fit This Rock Auger Bit?
Rock augers connect to the auger drive unit rather than to the machine, so the drive output is what matters. Standard fitment is a 2 inch hex connection suiting Star 160D drive units and other makes with the same output, and an optional round drive version is available by adding the suffix B to the model number. Adapters 160A-AD01 and 160A-AD02 convert between 2 inch hex and 2.5 inch round in either direction. Rock drilling puts high torque through the whole train, so match the bit to a drive with enough torque for the diameter rather than to the largest bit the coupler will accept.
| Requirement | Detail |
|---|---|
| Drive connection | 2 in hex standard; optional round drive available by adding suffix B to the model number |
| Adapters | 160A-AD01 converts 2 in hex drive to 2.5 in round bit; 160A-AD02 converts 2.5 in round drive to 2 in hex bit |
| Compatible drives | Star 160D auger drive units, and other makes using a 2 in hex or 2.5 in round output |
| Machine types | Skid steer loaders, compact track loaders, mini skid steers, mini excavators and backhoes running a Star auger drive |
| Hydraulics | Supplied by the auger drive unit, not by the bit itself |
❓ Star Industries 160A-R Rock Auger Questions, Answered
When do I need a rock auger instead of a dirt auger?
When the ground is solid rock, concrete, or too hard for a dirt auger to enter. A rock auger is the tool for that; The Star 160A-R is built for solid rock, concrete, fractured rock, frozen ground and heavily compacted soil. The 160A-HDSF single flight dirt auger already handles frozen ground and fractured rock, so many sites never need to step up.
What are carbide bullet teeth?
Conical carbide-tipped teeth that chip rock away rather than shearing it, and rotate in their pockets as they wear so they self-sharpen. A steel dirt tooth glazes over in rock within a few feet; carbide bullets are what make rock drilling practical.
How many bullet teeth does each size carry?
Bullet count rises with diameter: 6 on the 6 inch, 8 on the 8 and 9 inch, 12 on the 12 inch, 18 on the 18 inch, 22 on the 24 inch, 24 on the 30 inch and 30 on the 36 inch.
What is the difference between the 6 inch rock auger and the larger sizes?
The pilot. The 6 inch bit uses a welded pilot; 8 inch and larger use a bolt-in 1 3/4 inch shaft pilot that can be replaced in the field. The larger bits also add a reinforced 3/4 inch bottom flight boring head with Rockwell 65 hard facing and double flighting on a 3 1/2 inch high strength tube.
Can I replace worn bullet teeth myself?
Yes. The carbide bullet tooth is part 160A-T10 and the pocket it seats in is 160A-112007. A bullet tooth puller, part 160A-112000, is available for teeth that have worn tight into their pockets. The bolt-on bullet tooth pilot is 160A-BT500S.
What is Rockwell 65 hard facing and where is it applied?
Rockwell 65 is a hardness rating for the facing material applied to the bottom flight of the boring head. That surface carries the whole cutting load at the base of the hole, so hard facing it is what keeps the head cutting rather than rounding off.
Will a rock auger fit my existing auger drive?
It fits any drive with a 2 inch hex output, including the Star 160D range, and a round drive version is available by adding suffix B. More important than the coupler is torque: rock drilling loads the whole train, so match the bit diameter to a drive with the torque to turn it.
Can a rock auger be used in ordinary soil?
It will drill soil, but it is slower and far more expensive than the right tool. Star skid steer auger bits in the HDSF dirt range are the better match; Carbide bullets are optimised for chipping hard material; a single flight dirt auger with Drive-In teeth digs faster and carries spoil better in soil.
How deep can I drill with a rock auger?
All 160A-R bits are 48 inches overall length. For deeper holes, fixed length shaft extensions are available in 24, 36, 48, 60 and 72 inch lengths, fitted between the drive and the bit.
How do I order a rock auger and how is it shipped?
Add the rock auger to your cart on eskidsteer.com and complete checkout online. Shipping is calculated at checkout once you enter your delivery address.
📥 Star Industries 160A-R Rock Auger Downloads
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