DymaxRail Ballast Blaster undercutter attachment with pin grab coupler on hi-railed excavator

Ballast Blaster Undercutter for Pin Grab Couplers

OVERVIEW COMPATIBILITY MID TO LARGE EXCAVATOR MODELS BACKHOE & SMALL EXCAVATOR ENHANCED PERFORMANCE VIDEO

UNDERCUTTING WITH EXCAVATORS AND BACKHOES

The DymaxRail Ballast Blaster Undercutter for pin grab quick couplers is an undercutter attachment that features advanced patented design and durability. A DymaxRail Ballast Blaster Undercutter efficiently removes fouled ballast rock and mud by cutting and pulling the material out from beneath the railway tracks. This attachment adapts to Railway Excavators and Backhoe Loaders equipped with a traditional pin-grab type coupler system and feature built-in rotation and tilt for positioning.

FASTER AND MORE EFFICIENT

Rail networks prefer using DymaxRail Ballast Blasters over conventional on-track ballast cleaners, as they are more efficient and easier to get on and off track, especially congested networks with severe time restraints.

BLASTER WEAR PLATES

Our patented Ballast Blaster Undercutter features bolt on indexable wear plates with full carbide protection that surrounds all sides of the cutter bar and includes a 2 year warranty.

BI-DIRECTIONAL CUTTING

A DymaxRail Ballast Blaster cuts and removes ballast faster with it’s innovative chain design. The Dymax Carbide Tooth (DCT) features two-sided protection allowing operators to cut in both directions.

DOWNLOAD BROCHURE REQUEST A QUOTE

Railroad Mud Spot – Fouled Ballast Requiring Undercutting

DymaxRail Ballast Blaster Undercutter on Railway Excavator

Got Mud ProblemsGet a Ballast Blaster

When an on-track machine isn’t the answer

Full ballast cleaning machines have their place — but they require dedicated track time, significant lead time to mobilize, and are sized for production runs, not spot work. Rail networks increasingly use excavator-mounted undercutters for mud spots, targeted fouling, areas around switches and crossings, and any situation where getting a large machine on track isn’t practical. The Ballast Blaster works from a hi-railed excavator or backhoe already on your crew — so you’re not scheduling around a machine, you’re solving the problem in the same window you’re already in.

Compatible with the backhoes & excavators your crew runs

The Ballast Blaster fits excavators and backhoe loaders from leading manufacturers, including Caterpillar (308–336 series), John Deere (85–350 series), and Komatsu (PC78–PC138). See the full model table for machine weight class, bar length options, and hydraulic requirements for your specific unit.

DymaxRail Ballast Blaster 180 and 360 rotation undercutter models for 13-30 ton excavators with automatic chain tensioning and carbide wear plates

B180 – Ballast Blaster

20-25 ton excavators
180-degree rotation through innovative hydraulic cylinders
10ft, 12ft and 15ft bar cutting length
30-degree bar tilt
Powerful drive motor
Replaceable carbide wear plates
Automatic chain tensioner
Optional spoilmaster wheel

B360RB – Ballast Blaster

13-18T Excavators
360 degree rotation box for compact slim design
Available only in 10ft cut length models for 13-18t excavators
10ft bar cutting length
30 degree bar tilt
Powerful drive motor
Replaceable carbide wear plates
Automatic chain tensioner
Optional spoilmaster wheel

B360-Twin Drive Ballast Blaster

25-30 ton excavators
360 degree rotation twin drive with built in brake
12ft and 15ft bar cutting length
30 degree bar tilt
Powerful drive motor
Replaceable carbide wear plates
Automatic chain tensioner
Optional spoilmaster wheel

B360-SMALL BALLAST BLASTER

Suited for Backhoe and 8-11 ton excavators
360 degree rotation (compact)
6ft and 8ft bar cutting length option
30 degree bar tilt
Powerful drive motor
Replaceable carbide wear plates
Manual chain tensioner

DymaxRail Ballast Blaster B360 small undercutter model for backhoe loaders and 8–11 ton excavators showing bolt-on carbide wear plates

AUTOMATIC CHAIN TENSION

For 13-36T models including 10, 12 and 15 foot cutter bar lengths.
Provides shock absorbing performance to increase chain life and reduce chain breaks.
Includes tensioner gauge for visual recognition of chain tension pressure.

DRIVE MOTOR PROTECTION

Full shroud protection around drive sprocket.
Reduces seal contamination by keeping unwanted debris out.
AR400 Wear plates provide additional wear protection.

SERVICE. SIMPLIFIED.

When its time to service it’s quick and easy with removable top adapter.

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SPECIFICATIONS

360 ROTATION UNDERCUTTERS - PIN GRAB COUPLER

Model
Description
Weight

DX-UC-B360-6ftxADCT-BL-10

Undercutter-Ballast Blaster 360 degree rotation-6 feet cutting length x Size “A” chain with DymaxRail Carbide Teeth-Backhoe Loader-Class 10

45mm/50mm pin connection size

STANDARD FEATURES:

– Cut length: 6 feet
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Mechanical adjuster
– Chain type: Style “A” Series bidirectional cutting chain with DymaxRail forged cutting teeth with carbide tips
– Chain Cut Width: 4.1 inches
– Motor: High torque motor, size 25 with heavy duty bearing group
– Rotation: 360 degree continuous rotation system
– Bar tilt: Hydraulic bar tilt, cylinder driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 1850 lbs

DX-UC-B360-6ftxADCT-HX-8T

Undercutter-Ballast Blaster 360 degree rotation-6 feet cutting length x Size “A” chain with DymaxRail Carbide Teeth-Hydraulic Excavator-8 ton
45mm/50mm pin connection size

STANDARD FEATURES:

– Cut Length: 6 feet
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Mechanical adjuster
– Chain Type: Style “A” Series bidirectional cutting chain with DymaxRail forged cutting teeth with carbide tips
– Chain Cut Width: 4.1 inches
– Motor: High torque motor, size 25 with heavy duty bearing group
– Rotation: 360 degree continuous rotation system
– Bar tilt: Hydraulic bar tilt, cylinder driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 1850 lbs

DX-UC-B360-8ftxADCT-BL-20

Undercutter-Ballast Blaster 360 degree rotation-8 feet cutting length x Size “A” chain with DymaxRail Carbide Teeth-Backhoe Loader-Class 20

50mm pin connection size

STANDARD FEATURES:
– Cut Length: 8 feet
– Chain Cut Width: 4.1 inches
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Mechanical adjuster
– Chain Type: Style “A” Series bidirectional cutting chain with DymaxRail forged cutting teeth with carbide tips
– Motor: High torque motor, size 25 with heavy duty bearing group
– Rotation: 360 degree continuous rotation system
– Bar tilt: Hydraulic bar tilt, cylinder driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 2200 lbs

DX-UC-B360-8ftxADCT-HX-8T

Undercutter-Ballast Blaster 360 degree rotation-8 feet cutting length x Size “A” chain with DymaxRail Carbide Teeth-Hydraulic Excavator-8 ton

50mm pin connection size

STANDARD FEATURES:

– Cut Length: 8 feet
– Chain Cut Width: 4.1 inches
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Mechanical adjuster
– Chain Type: Style “A” Series bidirectional cutting chain with DymaxRail forged cutting teeth with carbide tips
– Motor: High torque motor, size 25 with heavy duty bearing group
– Rotation: 360 degree continuous rotation system
– Bar tilt: Hydraulic bar tilt, cylinder driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 2200 lbs

DX-UC-B360-8ftxADCT-HX-11T

Undercutter-Ballast Blaster 360 degree rotation-8 feet cutting length x Size “A” chain with DymaxRail Carbide Teeth-Hydraulic Excavator-11 ton

50mm pin connection size

WEIGHT: 2280 lbs

DX-UC-B360-9ftxBDCT-HX-12T

Undercutter-Ballast Blaster 360 degree rotation-9 feet cutting length x Size “B” chain with DymaxRail Carbide Teeth-Hydraulic Excavator-12 ton

60/65mm pin connection size

STANDARD FEATURES:
– Cut Length: 9 feet
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Automatic chain tension US Patent 9487921
– Chain Type: Style “B” Series bidirectional cutting chain with DymaxRail forged cutting teeth with carbide tips
– Chain Cut Width: 6.0 inches
– Motor: High torque motor, size 30 with heavy duty bearing group
– Rotation: 360 degree continuous rotation system
– Bar tilt: Hydraulic bar tilt, cylinder driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 5000 lbs

DX-UC-B360-10ftxBDCT-HX-14T

Undercutter-Ballast Blaster 360 degree rotation-10 feet cutting length x Size “B” chain with DymaxRail Carbide Teeth-Hydraulic Excavator-14 ton

60/65mm pin connection size

STANDARD FEATURES:
– Cut Length: 10 feet
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Automatic chain tension US Patent 9487921
– Chain Type: Style “B” Series bidirectional cutting chain with DymaxRail forged cutting teeth with carbide tips
– Chain Cut Width: 6.0 inches
– Motor: High torque motor, size 30 with heavy duty bearing group
– Rotation: 360 degree continuous rotation system
– Bar tilt: Hydraulic bar tilt, cylinder driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 5300 lbs

DX-UC-B360-10ftxCDCT-HX-14T

Undercutter-Ballast Blaster 360 degree rotation-10 feet cutting length x Size “C” chain with DymaxRail Carbide Teeth-Hydraulic Excavator-14 ton

60/65mm pin connection size

STANDARD FEATURES:
– Cut Length: 10 feet
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Automatic chain tension US Patent 9487921
– Chain Type: Style “C” Series bidirectional cutting chain with DymaxRail forged cutting teeth with carbide tips
– Chain Cut Width: 6.0 inches
– Motor: High torque motor, size 30 with heavy duty bearing group
– Rotation: 360 degree continuous rotation system
– Bar tilt: Hydraulic bar tilt, cylinder driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 5300 lbs

DX-UC-B360-12ftxBRCB-HX-25T

Undercutter-Ballast Blaster 360 degree rotation-12 feet cutting length x Size “B” chain with Rotate Carbide Bits-Hydraulic Excavator-25 ton

90-100mm pin connection sizes

STANDARD FEATURES:
– Cut Length: 12 feet
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Automatic chain tension US Patent 9487921
– Chain Type: Style “B” Series bidirectional cutting chain with Rotating carbide bits
– Chain Cut Width: 6.0 inches
– Motor: High torque motor, size 35 with heavy duty bearing group
– Rotation: 360 degree continuous rotation system with integrated brake
– Bar tilt: Hydraulic bar tilt, cylinder driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 6700 lbs

DX-UC-B360-12ftxBDCT-HX-30T

Undercutter-Ballast Blaster 360 degree rotation-12 feet cutting length x Size “B” chain with DymaxRail Carbide Teeth-Hydraulic Excavator-30 ton

90-100mm pin connection sizes

STANDARD FEATURES:
– Cut Length: 12 feet
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Automatic chain tension US Patent 9487921
– Chain Type: Style “B” Series bidirectional cutting chain with DymaxRail forged cutting teeth with carbide tips
– Chain Cut Width: 6.0 inches
– Motor: High torque motor, size 35 with heavy duty bearing group
– Rotation: 360 degree continuous rotation system with integrated brake
– Bar tilt: Hydraulic bar tilt, cylinder driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 6800 lbs

DX-UC-B360-12ftxCDCT-HX-30T

Undercutter-Ballast Blaster 360 degree rotation-12 feet cutting length x Size “C” chain with DymaxRail Carbide Teeth-Hydraulic Excavator-30 ton

90-100mm pin connections

STANDARD FEATURES:
– Cut Length: 12 feet
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Automatic chain tension US Patent 9487921
– Chain Type: Style “C” Series bidirectional cutting chain with DymaxRail forged cutting teeth with carbide tips
– Chain Cut Width: 6.0 inches
– Motor: High torque motor, size 35 with heavy duty bearing group
– Rotation: 360 degree continuous rotation system with integrated brake
– Bar tilt: Hydraulic bar tilt, cylinder driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 6800 lbs

DX-UC-B360-15ftxCDCT-HX-30T

Undercutter-Ballast Blaster 360 degree rotation-15 feet cutting length x Size “C” chain with DymaxRail Carbide Teeth-Hydraulic Excavator-30 ton

90-100mm pin connection size

STANDARD FEATURES:
– Cut Length: 15 feet
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Automatic chain tension US Patent 9487921
– Chain Type: Style “C” Series bidirectional cutting chain with DymaxRail forged cutting teeth with carbide tips
– Chain Cut Width: 6.0 inches
– Motor: High torque motor, size 42 with heavy duty bearing group
– Rotation: 360 degree continuous rotation system with integrated brake
– SpoilMaster Ready: Yes
– Bar tilt: Hydraulic bar tilt, cylinder driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 7400 lbs

DX-UC-B360-15ftxCRCB-HX-30T

Undercutter-Ballast Blaster 360 degree rotation-15 feet cutting length x Size “C” chain with Rotate Carbide Bits-Hydraulic Excavator-30 ton

90-100mm pin connection size

STANDARD FEATURES:
– Cut Length: 15 feet
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Automatic chain tension US Patent 9487921
– Chain Type: Style “C” Series bidirectional cutting chain with rotating carbide bits
– Chain Cut Width: 6.0 inches
– Motor: High torque motor, size 42 with heavy duty bearing group
– Rotation: 360 degree continuous rotation system with integrated brake
– SpoilMaster Ready: Yes
– Bar tilt: Hydraulic bar tilt, cylinder driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 7400 lbs

Design and specifications are subject to change without notice.

180 ROTATION UNDERCUTTERS - PIN GRAB COUPLER

Model
Description
Weight

DX-UC-B180-10ftxBDCT-HX-20T

Undercutter-Ballast Blaster 180 degree rotation-10 feet cutting length x Size “B” chain with DymaxRail Carbide Teeth-Hydraulic Excavator-20 ton

80mm pin connection size

STANDARD FEATURES:
– Cut Length: 10 feet
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Automatic chain tension US Patent 9487921
– Chain Type: Style “B” Series bidirectional cutting chain with DymaxRail forged cutting teeth with carbide tips
– Chain Cut Width: 6.0 inches
– Motor: High-torque motor, size 30 with heavy-duty bearing group
– Rotation: 180-degree rotation system – hydraulic cylinder arrangement
– Bartilt: Hydraulic Bar Tilt Cylinder Driven provided with electro-hydraulic diverter valve and wiring kit

WEIGHT: 5500 lbs

DX-UC-B180-10ftxBRCB-HX-20T

Undercutter-Ballast Blaster 180 degree rotation-10 feet cutting length x Size “B” chain with Rotate Carbide Bits-Hydraulic Excavator-20 ton

80mm pin connection size

STANDARD FEATURES:
– Cut length: 10 feet
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Automatic chain tension US Patent 9487921
– Chain Type: Style “B” Series bidirectional cutting chain with DymaxRail forged cutting teeth with rotating carbide bits
– Chain Cut Width: 6.0 inches
– Motor: High-torque motor, size 30 with heavy-duty bearing group
– Rotation: 180-degree rotation system – Hydraulic Cylinder Arrangement
– Bar Tilt: Hydraulic bar tilt, cylinder-driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 5500 lbs

DX-UC-B180-10ftxCDCT-HX-20T

Undercutter-Ballast Blaster 180 degree rotation-10 feet cutting length x Size “C” chain with DymaxRail Carbide Teeth-Hydraulic Excavator-20 ton

80mm pin connection size

STANDARD FEATURES:
– Cut Length: 10 feet
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Automatic chain tension US Patent 9487921
– Chain Type: Style “C” Series bidirectional cutting chain with DymaxRail forged cutting teeth with carbide tips
– Chain Cut Width: 6.0 inches
– Motor: High-torque motor, size 30 with heavy-duty bearing group
– Rotation: 180-degree rotation system – Hydraulic Cylinder Arrangement
– Bar Tilt: Hydraulic bar tilt, cylinder-driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 5500 lbs

DX-UC-B180-10ftxCRCB-HX-20T

Undercutter-Ballast Blaster 180 degree rotation-10 feet cutting length x Size “C” chain with Rotate Carbide Bits-Hydraulic Excavator-20 ton

80mm pin connection size

STANDARD FEATURES:
– Cut Length: 10 feet
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Automatic chain tension US Patent 9487921
– Chain Type: Style “C” Series bidirectional cutting chain with DymaxRail forged cutting teeth with rotating carbide bits
– Chain Cut Width: 6.0 inches
– Motor: High-torque motor, size 30 with heavy-duty bearing group
– Rotation: 180-degree rotation system – Hydraulic Cylinder Arrangement
– Bar Tilt: Hydraulic bar tilt, cylinder-driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 5500 lbs

DX-UC-B180-12ftxCDCT-HX-20T

Undercutter-Ballast Blaster 180 degree rotation-12 feet cutting length x Size “C” chain with DymaxRail Carbide Teeth-Hydraulic Excavator-20 ton

80mm pin connection size

STANDARD FEATURES:
– Cut Length: 12 feet
– Chain Cut Width: 6.0 inches
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Auto chain tensioner US Patent # 9487921
– Chain Type: Style “C” Series bidirectional cutting chain with DymaxRail forged cutting teeth with carbide tips
– Motor: High-torque motor size 35 with a heavy-duty bearing group
– Motor Box: Quick-change motor box top assembly
– Spoilmaster Ready: Yes
– Rotation: 180-degree continuous rotation system; Cylinder powered
– Bar Tilt: Hydraulic bar tilt, cylinder-driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 5850 lbs

DX-UC-B180-12ftxCRCB-HX-20T

Undercutter-Ballast Blaster 180 degree rotation-12 feet cutting length x Size “C” chain with Rotate Carbide Bits-Hydraulic Excavator-20 ton

80mm pin connection size

STANDARD FEATURES:
– Cut Length: 12 feet
– Chain Cut Width: 6.0 inches
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Auto chain tensioner US Patent # 9487921
– Chain Type: Style “C” Series bidirectional cutting chain with DymaxRail forged cutting teeth with carbide tips
– Motor: High-torque motor size 35 with a heavy-duty bearing group
– Motor Box: Quick-change motor box top assembly
– Spoilmaster Ready: Yes
– Rotation: 180-degree continuous rotation system; cylinder powered
– Bar Tilt: Hydraulic bar tilt, cylinder-driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 5850 lbs

DX-UC-B180-12ftxCDCT-HX-25T

Undercutter-Ballast Blaster 180 degree rotation-12 feet cutting length x Size “C” chain with DymaxRail Carbide Teeth-Hydraulic Excavator-25 ton

90-100mm pin connection size

STANDARD FEATURES:
– Cut Length: 12 feet
– Chain Cut Width: 6.0 inches
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Auto chain tensioner US Patent # 9487921
– Chain Type: Style “C” Series bidirectional cutting chain with DymaxRail forged cutting teeth with carbide tips
– Motor: High-torque motor size 35 with heavy duty bearing group
– Motor Box: Quick-change motor box top assembly
– Spoilmaster Ready: Yes
– Rotation: 180-degree continuous rotation system; Cylinder powered
– Bar Tilt: Hydraulic bar tilt, cylinder-driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 6000 lbs

DX-UC-B180-15ftxCDCT-HX-30T

Undercutter-Ballast Blaster 180 degree rotation-15 feet cutting length x Size “C” chain with DymaxRail Carbide Teeth-Hydraulic Excavator-30 ton

90-100mm pin connection size

STANDARD FEATURES:
– Cut Length: 15 feet / 4.57M
– Chain Cut Width: 6.0 inches
– Bar: Patented bar with replaceable carbide wear plates, US Patent # 8904676
– Tensioner: Auto chain tensioner US Patent # 9487921
– Chain Type: Style “C” Series bidirectional cutting chain with DymaxRail forged cutting teeth with carbide tips
– Motor: High-torque motor size 42 with heavy-duty bearing group
– Motor Box: Quick-change motor box top assembly
– Spoilmaster Ready: Yes
– Rotation: 180-degree continuous rotation system; Cylinder powered
– Bar Tilt: Hydraulic bar tilt, cylinder-driven, provided with electro-hydraulic diverter valve and wiring kit.

WEIGHT: 6600 lbs

Design and specifications are subject to change without notice.

CUTTING CHAIN AND TOOTH OPTIONS

All models feature standard DymaxRail two-way carbide forged cutting teeth (DCT Model designations)
For customers who prefer rotating carbide bits we offer Kennemetal cutting solutions.
- Rotating carbide bit models are designated as (RCB) in the models listing.
Chain sizes are matched to horsepower requirements.
For custom OEM Solutions, contact DymaxRail.

HYDRAULIC REQUIREMENTS

MODELS: DX-UC-B360-6ftxADCT-HX-8T, DX-UC-B360-6ftxADCT-BL-10

HYDRAULIC REQUIREMENTS: Setup and operation are critical for proper operation. Your machine needs to be set up with TWO hydraulic circuits capable of meeting the requirements below. If you have questions, please contact DymaxRail sales for more information.

CIRCUIT 1 – Chain Drive Motor
– Type: Two way + drain line to tank
– Min drain size -08 (1/2in)
– Flow and Pressure GPM/PSI (min/max): 20-26 / 4,500

CIRCUIT 2 – Rotator
– Type: Two-way Med Pressure
– Flow and Pressure GPM/PSI (max): 8 / 3,000

CIRCUIT 3 – Bar Tilt
– Type: Electro-Hyd Diverter Valve
– Set up on the Undercutter. Requires installation of the electric cable service kit provided with switch and fuse.
– Diverts oil from CIRCUIT 2 rotator system.