PRODUCT HIGHLIGHTS
- Machine Compatibility: Excavators, backhoe loaders, grapple trucks, rail cranes
- Tine Spread: 21 inches – wider footprint for stable tamping
- Vibrator Group: High-frequency design for fast, consistent tamping.
- Motor: Single vibrator motor.
- Hydraulics: Twin cylinders with flow control for smooth tamping.
- Rotation Options: 270° electro-hydraulic rotation or no rotation for fitting tiltrotator couplers.
APPLICATIONS
- Turnout and crossover tamping
- Spot tamping along mainline and siding track
- Yard track maintenance
- Tamping support for crane and MOW operations
- Tight-access tamping near structures and switches
- Tie replacement and surfacing projects
KEY FEATURES
- 21-inch tine spread with single-side configuration: Wide enough for stable compaction across both ends of the tie. Bolt-on tines can be removed for left- or right-side-only tamping when clearance is too tight for a full spread. Useful in tight switch areas and near structures where a standard spread won’t fit.
- Lightweight, compact design: Ideal for 5T excavators and tight-access job sites, including crane rail applications.
- Powerful Dymax Rail vibrator group: Delivers high-frequency vibration with fewer motor issues.
- Twin-cylinder design: Applies direct force to the tine holder for efficient ballast compaction.
- Heavy-duty rubber isolators: Reduce vibration transfer and extend service life of both tool and carrier.
- Bolt-on steel tines with carbide wear pads: Easy to replace for long service life.
- Rotation options: Optional 270° rotation system or can be made to fit tiltrotators couplers, railroad cranes, and grapple trucks.
- Electro-hydraulic valve kit: Smooth, precise operation for rotation-equipped models.
- Transport stand with tie-down points: Simplifies handling and storage.
OPTIONS
- Longer tamping tines suited to rail crane applications
FAQ
WHAT’S THE SMALLEST MACHINE THE SERIES 21 WILL RUN ON?
The Series 21 is configured for hydraulic excavators as small as 5 tons, making it one of the few tamper attachments rated for compact carriers in rail service. It also fits backhoe loaders (Class 10 and 20), grapple trucks, and rail cranes. For crane applications, longer tamping tines are available as an option.
CAN I USE A TAMPER ATTACHMENT FOR RAILROAD CRANE WORK?
Yes — the Series 21 is specifically configured for crane rail applications. Longer tines are available to reach the required tamping depth from a crane-mounted position, and the 270° rotation or tiltrotator compatibility gives the operator the positioning range needed when working from above the track rather than beside it. If you’re running a crane on your MOW program and need tamping capability without adding a separate machine, contact DymaxRail to confirm fit for your specific crane model.
WHAT DOES SINGLE-SIDE TAMPING MEAN, AND WHEN DO I NEED IT?
The Series 21’s bolt-on tines can be removed to run only the left or right side of the workhead. This lets operators tamp one side of a tie at a time in locations where a full spread won’t fit — next to a switch rod, near a structure, or in any clearance situation where inserting both tine sets simultaneously isn’t possible. It’s a minor hardware change that avoids having to bring a different tool to the job.
SPECIFICATIONS
MODELS WITH 270° ROTATION
| Model Code Description Weight (lbs) |
| DX-BT-DYM21-270×1-GT-10
Ballast Tamper-DymaxRail Series 21-270 degree rotation x 1 motor-Grapple Truck-Class 10 STANDARD FEATURES: – 21 inch tine spacing – 270 degree rotation system – Bolt-on AR400 1.50in tines with AR500 pads – DymaxRail heavy duty vibrator group – Twin cylinder; outside mount design with integrated stop and flow control valves – Machine adapter with pins – Integrated flow control for motor circuit – 12v/24v Electro hydraulic valve mounted on workhead provided with cable kit – Transport stand with tie downs included WEIGHT: 1900 lbs |
| DX-BT-DYM21-270×1-BL-10
Ballast Tamper-DymaxRail Series 21-270 degree rotation x 1 motor-Backhoe Loader-Class 10 STANDARD FEATURES: – 21 inch tine spacing – 270 degree rotation system – Bolt-on AR400 1.50 inch tines with AR500 pads – DymaxRail heavy duty vibrator group – Twin cylinder; outside mount design with integrated stop and flow control valves – Machine adapter with pins – Integrated flow control for motor circuit – 12v/24v Electro hydraulic valve mounted on workhead provided with cable kit – Transport stand with tie downs included WEIGHT: 1900 lbs |
| DX-BT-DYM21-270×1-BL-20
Ballast Tamper-DymaxRail Series 21-270 degree rotation x 1 motor-Backhoe Loader-Class 20 STANDARD FEATURES: – 21 inch tine spacing – 270 degree rotation system – Bolt-on AR400 1.50in tines with AR500 pads – DymaxRail heavy duty vibrator group – Twin cylinder; outside mount design with integrated stop and flow control valves – Bolt 202 machine adapter with pins – Integrated flow control for motor circuit – 12v/24v Electro hydraulic valve mounted on workhead provided with cable kit – Transport stand with tie downs included WEIGHT: 1900 lbs |
| DX-BT-DYM21-270×1-HX-5T
Ballast Tamper-DymaxRail Series 21-270 degree rotation x 1 motor-Hydraulic Excavator-5 Ton STANDARD FEATURES: – 21 inch tine spacing – 270 degree rotation system – Bolt-on AR400 1.50in tines with AR500 pads – DymaxRail heavy duty vibrator group – Twin cylinder; outside mount design with integrated stop and flow control valves – Bolt 202 machine adapter with pins – Integrated flow control for motor circuit – 12v/24v Electro hydraulic valve mounted on workhead provided with cable kit – Transport stand with tie downs included WEIGHT: 1900 lbs |
| DX-BT-DYM21-270×1-HX-8T Ballast Tamper-DymaxRail Series 21-270 degree rotation x 1 motor-Hydraulic Excavator-8 Ton
STANDARD FEATURES: – 21 inch tine spacing – 270 degree rotation system – Bolt-on AR400 1.50in tines with AR500 pads – DymaxRail heavy duty vibrator group – Twin cylinder; outside mount design with integrated stop and flow control valves – Bolt 202 machine adapter with pins – Integrated flow control for motor circuit – 12v/24v Electro hydraulic valve mounted on workhead provided with cable kit – Transport stand with tie downs included WEIGHT: 1900 lbs |
Design and specifications are subject to change without notice.
MODELS WITHOUT ROTATION (FITS TILTROTATOR COUPLERS)
| Model Code Description Weight (lbs) |
| DX-BT-DYM21-TRQx1-BL-10
Ballast Tamper-DymaxRail Series 21-Tilt Rotator Coupler x 1 motor-Backhoe Loader-Class 10 STANDARD FEATURES: – 21 inch tine spacing – Bolt-on AR400 1.5in tines with AR500 pads – DymaxRail heavy duty vibrator group – Twin cylinder; outside mount design with integrated stop – Integrated flow control on motor circuit – Bolt 202 machine adapter with pins – Transport stand with tie downs included WEIGHT: Tamper: 1350 lbs / Stand: 300 lbs / Total Weight: 1650 lbs |
| DX-BT-DYM21-TRQx1-BL-20
Ballast Tamper-DymaxRail Series 21-Tilt Rotator Coupler x 1 motor-Backhoe Loader-Class 20 STANDARD FEATURES: – 21 inch tine spacing – Bolt-on AR400 1.5in tines with AR500 pads – DymaxRail heavy duty vibrator group – Twin cylinder; outside mount design with integrated stop – Integrated flow control – Bolt 202 machine adapter with pins – Transport stand with tie downs included WEIGHT: Tamper: 1350 lbs / Stand: 300 lbs / Total Weight: 1650 lbs |
| DX-BT-DYM21-TRQx1-HX-5T
Ballast Tamper-DymaxRail Series 21-Tilt Rotator Coupler x 1 motor-Hydraulic Excavator-5 Ton STANDARD FEATURES: – 21 inch tine spacing – Bolt-on AR400 1.5in tines with AR500 pads – DymaxRail heavy duty vibrator group – Twin cylinder; outside mount design with integrated stop – Integrated flow control on motor circuit – Bolt 202 machine adapter with pins – Transport stand with tie downs included WEIGHT: Tamper: 1350 lbs / Stand: 300 lbs / Total Weight: 1650 lbs |
| DX-BT-DYM21-TRQx1-HX-8T
Ballast Tamper-DymaxRail Series 21-Tilt Rotator Coupler x 1 motor-Hydraulic Excavator-8 Ton STANDARD FEATURES: – 21 inch tine spacing – Bolt-on AR400 1.5in tines with AR500 pads – DymaxRail heavy duty vibrator group – Twin cylinder; outside mount design with integrated stop – Integrated flow control on motor circuit – Bolt 202 machine adapter with pins – Transport stand with tie downs included WEIGHT: Tamper: 1350 lbs / Stand: 300 lbs / Total Weight: 1650 lbs |
| DX-BT-DYM21-TRQx1-HX-12T
Ballast Tamper-DymaxRail Series 21-Tilt Rotator Coupler x 1 motor-Hydraulic Excavator-12 Ton STANDARD FEATURES: – 21 inch tine spacing – Bolt-on AR400 1.5in tines with AR500 pads – DymaxRail heavy duty vibrator group – Twin cylinder; outside mount design with integrated stop – Integrated flow control – Bolt 202 machine adapter with pins – Transport stand with tie downs included WEIGHT: Tamper: 1550 lbs / Stand: 300 lbs / Total Weight: 1850 lbs |
| DX-BT-DYM21-TRQx1-HX-16T
Ballast Tamper-DymaxRail Series 21-Tilt Rotator Coupler x 1 motor-Hydraulic Excavator-16 Ton STANDARD FEATURES: – 21 inch tine spacing – Bolt-on AR400 1.5in tines with AR500 pads – DymaxRail heavy duty vibrator group – Twin cylinder; outside mount design with integrated stop – Integrated flow control on motor circuit – Bolt 202 machine adapter with pins – Transport stand with tie downs included WEIGHT: Tamper: 1350 lbs / Stand: 300 lbs / Total Weight: 1950 lbs |
Design and specifications are subject to change without notice.
HYDRAULIC REQUIREMENTS
| MODELS: DX-BT-DYM21-270×1-GT-10 | DX-BT-DYM21-270×1-BL-10 | DX-BT-DYM21-270×1-BL-20 | DX-BT-DYM21-270×1-HX-5T | DX-BT-DYM21-270×1-HX-8T |
| HYDRAULIC REQUIREMENTS:
Your machine will require the following (2x) circuits to operate the attachment. It also requires a drain line for the motor circuit. This attachment is provided with an electro-hydraulic valve to power the rotation circuit. Installation of the cabling kit is required prior to use. If your machine does not have the correct number of hydraulic circuits or controls please contact your sales representative to discuss alternative solutions for setup of the attachment. CIRCUIT 1 – VIBRATE MOTOR CIRCUIT2 – TINE SQUEEZE ARMS CIRCUIT 3 – ROTATION NOT SUPPLIED: Jumper hose lines from attachment bulkhead to machine lines with disconnects. |
| MODELS: DX-BT-DYM21-TRQx1-BL-10 | DX-BT-DYM21-TRQx1-BL-20 | DX-BT-DYM21-TRQx1-HX-5T | DX-BT-DYM21-TRQx1-HX-8T | DX-BT-DYM21-TRQx1-HX-12T | DX-BT-DYM21-TRQx1-HX-16T |
| HYDRAULIC REQUIREMENTS:
Your machine will require the following (2x) circuits to operate the attachment. It also requires a drain line for the motor circuit. CIRCUIT 1 – MOTOR CIRCUIT 2 – TINE SQUEEZE NOT SUPPLIED: Jumper hoses from the attachment to the machine lines. |
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