The USA contractor in Colorado was stuck on a hard rock excavation job. He found YG videos of an excavator drum cutter online and contacted YG about buying one. After reviewing his rock conditions, YG recommended a two-attachment solution: a YG1400 excavator breaker hammer for breaking large hard rock, plus a YG-200 excavator drum cutter for precision excavation and profiling. The result: excavation speed increased by 55%, blasting permits were avoided entirely, labor dropped from 6 workers to 3, cost per cubic yard fell by about 40%, and the equipment paid for itself in 7 months. Do you have a similar situation? Contact YG at +8613937183205.
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What Was the Problem? Hard Rock, Tight Deadlines, and No Blasting Allowed
Our customer is based in Colorado, USA. He runs a mid-sized excavation and site work company with about 30 employees. His core business is residential and commercial site preparation—foundations, utility trenches, road sub-base, and rock excavation. He owns several excavators, including a 25-ton machine.
The project was a hillside development. The ground was hard rock—sandstone and granite with compressive strength around 100–140 MPa. The original plan was drilling and blasting. That plan fell apart fast:
- Blasting permits were delayed. Local regulations required extra studies. The approval timeline stretched to 10–14 weeks.
- Blasting was restricted. The site was within 300 meters of occupied homes. Vibration limits made blasting nearly impossible.
- The breaker alone was too slow. He had one breaker hammer. It broke the big rock, but the surface was jagged and uneven.
- The breaker could not do fine work. Trenches for utilities needed straight walls and flat bottoms. The breaker left a mess.
- He was paying for off-site disposal. Broken rock had to be trucked away—expensive and time-consuming.
- Labor costs were climbing. He needed 6 workers per shift to handle the rock.
He told us: “I can break rock all day with a hammer. But I can’t finish it. And I can’t blast. I need something that cuts.”
Why Did He Start Looking at an Excavator Drum Cutter?
He found the YG website while searching for an excavator rock hammer. But during his research, he kept seeing videos of rotary drum cutters cutting trenches in rock—clean, straight, and quiet. That caught his attention.
An excavator drum cutter uses a rotating drum with carbide picks. Instead of smashing the rock, it grinds and cuts it. That means:
- Clean trench walls and flat bottoms
- Less noise and vibration than a breaker
- No secondary breaking needed
- Material can often be reused on site as backfill
He was intrigued. But he was not sure a drum cutter could handle his rock. He also wasn’t sure it could replace his breaker. So he contacted YG Machinery.
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Why Did YG Recommend an Excavator Drum Cutter Pair With an Excavator Rock Hammer?
This is the key part. Many suppliers would have just sold him a drum cutter. We didn’t. We asked questions first:
- What is the rock compressive strength?
- How big are the rock blocks?
- What is the final surface requirement?
- What is your excavator’s hydraulic flow and pressure?
Based on his answers, we explained something important: an excavator drum cutter and a breaker do two different jobs. A drum cutter is excellent for trenching, profiling, and precision cutting in medium-hard rock. But when you have large, solid blocks of very hard rock, a drum cutter alone will wear out picks fast and cut slowly. You first need to break the rock into manageable pieces.
So we recommend a combination:
The Breaker: YG1400 Excavator Breaker Hammer
| Parameter | YG1400 Specification |
|---|---|
| Chisel Diameter | 140 mm |
| Suitable Carrier Weight | 18–26 Ton |
| Main Body Weight | 916 kg |
| Operating Pressure | 160–180 Kg/cm² |
| Hydraulic Oil Flow | 120–180 l/min |
| Blow Frequency | 350–500 bpm |
| Hose Diameter | 1 inch |
This matched his 25-ton excavator perfectly. It breaks the large hard rock into smaller pieces.
The Drum Cutter: YG-200 Excavator Drum Cutter
| Parameter | YG-200 Specification |
|---|---|
| Applicable Models | 20–35 T |
| Total Weight | 1000 kg |
| Milling Width | 720 mm |
| Milling Head Diameter | 510 mm |
| Number of Blades | 44 |
| RPM | 0–85 r/min |
| Traffic (Oil Flow) | 200 L/min |
| Maximum Pressure | 30 MPa |
| Maximum Torque | 10,600 N.m |
This handles the precision work: trenching, profiling, trimming, and finishing. Both attachments run on the same 25-ton excavator. He swaps them in about 20 minutes.
What Did He Worry About Before Buying?
He had real concerns. We answered every one.
- “Will a drum cutter survive my rock?” We explained the two-step method. Break first, cut second. This protects the picks and speeds up the work.
- “Will it fit my excavator?” We checked his hydraulic flow and pressure. The YG-200 excavator drum cutter needs 200 L/min. His machine delivered enough. The YG1400 excavator rock hammer needs 120–180 L/min. Both were within range.
- “What about pick wear?” We explained that cutting broken rock is much easier on picks than cutting solid rock. We shipped a spare pick kit with the machine.
- “Is it hard to operate?” We provided 4 days of on-site training. His operators learned both attachments.
- “What if it breaks down?” We offered a 12-month warranty, a spare parts kit, and remote technical support.
- “Is the price worth it?” We calculated the savings: no blasting permits, no off-site disposal, fewer workers, and faster completion. The payback was under 8 months.
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What Were the Unexpected Effects?
He expected faster trenching. He got much more.
| Result | Before Taking YG’s advice | After taking YG’s advice | Improvement |
|---|---|---|---|
| Excavation speed | 80 m³/day | 124 m³/day | +55% |
| Blasting permits | 10–14 weeks | 0 (not needed) | Eliminated |
| Labor per shift | 6 workers | 3 workers | -50% |
| Off-site rock disposal | 100% trucked out | 60% reused on site | -60% trucking |
| Surface finish | Rough, needed patching | Clean, ready for concrete | Rework nearly zero |
| Noise complaints | Frequent | Almost none | Major reduction |
| Project completion | Estimated 16 weeks | Completed in 10 weeks | 6 weeks earlier |
| Cost per cubic yard | $48 | $29 | -40% |
| Payback period | — | 7 months | — |
Other unexpected wins:
- He reused crushed rock as backfill. That saved trucking and material costs.
- He won a second contract. The developer hired him for the next phase because he finished early.
- Neighbors stopped complaining. The drum cutter is much quieter than a breaker.
- His operators preferred the drum cutter. Less vibration, less fatigue, better control.
- He avoided a $25,000 penalty. Finishing 6 weeks early eliminated delay fees.
What Did the Customer Say After Taking YG’s Advice?
“I called about a rock hammer. They told me I needed two tools, not one. At first I thought they were just trying to sell more. But they were right. The breaker does the heavy breaking. The drum cutter does the clean cutting. Together they do what neither one can do alone. I finished 6 weeks early. I should have bought this setup years ago.”
He has since asked us about a second drum cutter for his 35-ton excavator.
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Are You Facing the Same Problem?
If you are dealing with hard rock excavation, trenching in rock, or tight sites where blasting is not allowed, a hydraulic drum cutter combined with an excavator breaker hammer can be the answer.
The YG drum cutter series covers 6-ton to 50-ton excavators:
| Model | Applicable Models | Weight | Milling Width | Torque |
|---|---|---|---|---|
| YG-060 | Within 6T | 270 kg | 450 mm | 1,500 N.m |
| YG-150 | 8–18T | 650 kg | 680 mm | 6,300 N.m |
| YG-200 | 20–35T | 1000 kg | 720 mm | 10,600 N.m |
| YG-350 | 30–40T | 1550 kg | 950 mm | 23,300 N.m |
| YG-450 | 40–50T | 1800 kg | 1050 mm | 25,000 N.m |
| Dual-motor | 20–35T | 700 kg | 745 mm | 10,000 N.m |
Let YG Build Your Rock Excavation Solution-Contact YG Now
If you have a similar project—hard rock, no blasting, tight deadlines—contact us. Tell us your excavator size, rock type, and final surface requirement. We’ll recommend the right drum cutter attachment and excavator breaker hammer combination for your machine.
Don’t let hard rock slow you down. Don’t lose another contract because you can’t finish the surface. Contact YG today for an excavator drum cutter for sale, and let’s turn your rock problem into your advantage.
