MB Crushers Bucket Crusher | Model BF120.4 S4 | Mouth Opening Width 47″ | Machine Size 30-45 Tons | For Excavators

For Excavators

Crush On-Site and Haul Less with the BF120.4 S4

The MB Crushers Bucket Crusher BF120.4 S4 transforms your excavator into a powerful mobile crushing plant, delivering exceptional on-site material processing with unmatched efficiency. Engineered for heavy-duty performance, this premium attachment reduces hauling and disposal costs by turning demolition debris into reusable aggregate. Elevate your job site productivity with the industry leader in crushing technology, designed for the most demanding applications.

**Get more done per shift** — high-capacity design cuts cycle times
**Lower your cost-per-yard** — fewer loads to move the same amount
**Racks up billable hours** — reliable performance shift after shift

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MB Crushers Bucket Crusher | Model BF120.4 S4 | Mouth Opening Width 47" | Machine Size 30-45 Tons | For Excavators
$1.00

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MB Crushers Bucket Crusher | Model BF120.4 S4 | Mouth Opening Width 47″ | Machine Size 30-45 Tons | For Excavators
$1.00

Crush On-Site and Haul Less with the BF120.4 S4

The MB BF120.4 S4 bucket crusher is a vetted investment for owner-operators running 30-to-45-ton excavators. Built to process over 65 cubic yards of material per hour, it turns demolition debris, quarry rock, and landfill waste into reusable aggregate right on the jobsite. With a massive 47-inch mouth opening and heavy-duty craftsmanship, this unit handles high-demand crushing without needing a separate crusher and hauling crew. It operates on 50–69 GPM with pressures over 3,191 PSI, giving you direct control over output size.

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Processes 65+ Yards Per Hour
47 x 21 Inch Mouth
Customizable Hydraulic Output
Engineered For Longevity
10,582 lbs
Operating Weight
1.7 cu. yds
Load Capacity
30–45 Tons
Excavator Size Range
Caterpillar_336_Hydraulic_Excavator

Feature. . This ensures long-lasting durability and consistent performance in demanding conditions. Professional-grade materials and expert engineering come together to deliver a product you can rely on day after day, job after job. Every detail has been carefully considered to maximize your satisfaction and minimize downtime.

Caterpillar-330_Hydraulic_Excavator

Feature. . This ensures long-lasting durability and consistent performance in demanding conditions. Professional-grade materials and expert engineering come together to deliver a product you can rely on day after day, job after job. Every detail has been carefully considered to maximize your satisfaction and minimize downtime.

Liebherr-944

Feature. . This ensures long-lasting durability and consistent performance in demanding conditions. Professional-grade materials and expert engineering come together to deliver a product you can rely on day after day, job after job. Every detail has been carefully considered to maximize your satisfaction and minimize downtime.

Compatibility Check

Make sure your excavator meets these specs before requesting a quote.

  • Excavator operating weight between 66,100 and 99,200 lbs
  • Hydraulic oil flow between 50 and 69 GPM
  • System pressure greater than 3,191 PSI

Built for These Jobs

Take the crusher directly to the material instead of hauling it off-site.

Quarry Rock Crushing
Demolition Debris Recycling
Aggregate Processing
Landfill Waste Reduction

Full specifications

At a glance

Dimensions
47 inches
Warranty
See product page
Full specifications9 data points across 4 categories

Dimensions

Mouth Opening Width47 inches
Mouth Opening Height21 inches
Weight10,582 lbs

Power & Performance

Pressure>3,191 PSI
Oil Flow Range50–69 GPM
Load Capacity1.7 cubic yards
Excavator Compatibility66,100–99,200 lbs (30–45 tons)

Materials

Build QualitySee product page

Compliance & Warranty

WarrantySee product page

The Forge & Grit Promise

We back every attachment we sell with straightforward policies that respect your time and your bottom line.

Ships FreeNo hidden freight charges. Tracking emailed the day it ships from our US warehouse.
Guaranteed FitIf it doesn't fit your rig, send it back on us. No restocking fee. No runaround.
Price Match GuaranteeSend us a quote from any authorized US dealer and we will beat it.

MB Crushers Bucket Crusher | Model BF120.4 S4 | For Excavators 30-45 Tons

Transform your excavator into a powerful mobile crushing plant with the MB Crushers Bucket Crusher BF120.4 S4. Designed for heavy-duty excavators in the 30 to 45-ton class (66,100–99,200 lbs), this attachment delivers over 65 cubic yards per hour of high-output crushing performance. Whether you are processing aggregate at a quarry, reducing demolition debris, or recycling materials on a pipeline project, the BF120.4 S4 turns waste into valuable, reusable material on-site—eliminating hauling costs and boosting job site efficiency. Engineered by MB Crushers, a global leader in crushing technology, this model offers a massive 47-inch mouth opening and a robust 10,582 lb build, ensuring it handles the toughest materials with relentless reliability.

Key Features

  • Exceptional Throughput: Process over 65 cubic yards of material per hour for maximum productivity on large-scale projects.
  • Versatile Crushing Power: Ideal for quarries, demolition sites, aggregate recycling, pipelines, and landfills.
  • Durable, Heavy-Duty Construction: Weighing 10,582 lbs, the BF120.4 S4 is built for longevity and high performance in the most demanding environments.
  • Customizable Hydraulic Performance: Operates efficiently with oil flows of 50–69 gal/min and requires hydraulic pressure greater than 3,191 PSI for optimal crushing force.
  • Large Crushing Chamber: Features a 47-inch wide by 21-inch high mouth opening to accommodate a wide range of material sizes.
  • Adjustable Output: The jaw setting can be adjusted to produce different material sizes, giving you full control over the final product.

Specifications

Feature Specification
Model BF120.4 S4
Total Weight 10,582 lbs
Load Capacity 1.7 cubic yards
Productivity 65+ cubic yards per hour
Required Hydraulic Pressure > 3,191 PSI
Required Oil Flow Range 50–69 GPM
Mouth Opening Width 47 inches
Mouth Opening Height 21 inches
Excavator Weight Class 66,100–99,200 lbs (30–45 tons)

Why Choose MB Crushers Bucket Crusher | Model BF120.4 S4 | Mouth Opening Width 47″ | Machine Size 30-45 Tons | For Excavators

When your bottom line depends on speed and material reclamation, the MB Crushers BF120.4 S4 is the definitive choice. Unlike traditional crushing equipment that requires dedicated machinery and transport, this bucket crusher mounts directly onto your excavator, turning idle time into productive crushing time. It eliminates the need for costly material hauling and disposal, allowing you to recycle aggregate on the spot for backfill, road base, or new concrete production.

Built with premium, heavy-duty materials, the BF120.4 S4 is engineered to withstand the rigors of commercial use and demanding job site conditions day after day. Its universal mounting system is compatible with most major excavator brands, allowing for quick attachment in under 60 seconds without special tools. This model is specifically designed to pay for itself by reducing labor costs, eliminating dump fees, and increasing overall project profitability. Backed by MB Crushers’ world-class engineering and supported by our expert team, you are investing in a machine built for the long haul.

Please Note: Online pricing is not available for this item. Please request a quote via chat or by calling 330-919-7543 to ensure you get the exact configuration and support you need.

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About MB Crushers Skid Steer Buckets

MB Crushers manufactures professional-grade crushing bucket, padding bucket, sorting grapple, pulverizer, and screening bucket for skid steers, excavators, and compact equipment. Shop 53 MB Crushers attachments at Iron Attachments with competitive pricing and fast US shipping.
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