Does the DM-20 mast require welding to install on my bulldozer?

No. The DM-20 mast bolts directly to standard bulldozer mounting points without welding, drilling, or tapping. For Trimble Ready equipped machines, installation is even faster with no additional machine modification needed.

What batteries are included, and how long do they last during a typical grading shift?

The kit includes rechargeable NiMH batteries and charger. Battery runtime depends on receiver usage patterns and laser signal intensity, but daily charge cycles before shifts help maintain optimal performance during extended grading operations. We recommend performing a full charge overnight between workdays.

Can I use the LR30-DM with my existing Spectra Precision laser system?

Yes. The LR30 receiver integrates with existing Spectra Precision laser systems and other LR Series compatible grading equipment already deployed on your job sites, so you leverage established survey infrastructure without additional equipment purchases.

What's the difference between buying this integrated system versus purchasing the LR30 receiver and DM-20 mast separately?

The LR30-DM is pre-coordinated and tested as a complete system, eliminating compatibility concerns and reducing setup time. Buying separately means managing two vendor relationships, verifying component compatibility yourself, and potentially facing longer overall deployment timelines.

Are there any setup steps I should perform before operating the system?

Mount the DM-20 mast securely to your bulldozer and tighten all bolts, then apply thread-locking compound to prevent vibration-related loosening during blade cycling. Charge the included batteries, install them in the receiver, mount the receiver on the mast, calibrate with your Spectra Precision laser system, and test blade control feedback before production grading work.

What should I do if I experience mast vibration or laser signal drop-out during grading operations?

Verify all DM-20 mast mounting bolts are tight before first operation and periodically during heavy use—vibration loosens bolts over time. Position the receiver to minimize cable management strain on connections. If laser signal intermittency persists at extended distances, ensure your Spectra Precision laser system is properly leveled and within effective range for your grade specifications.

Spectra 010459-99S Replacement CLAMPS (2 Pack) for LR30, LR30W, LR50, LR50W, LR60 and LR60W

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At a Glance

Knowledge Summary: The Spectra Precision LR30-DM is a complete integrated system combining the LR30 Machine Display Receiver with the DM-20 bulldozer mast, offering a turnkey solution for immediate laser-guided blade control on bulldozers and similar grading equipment. Rather than sourcing receiver and mast separately, the LR30-DM bundles proven components into one coordinated system. The package arrives with rechargeable NiMH batteries and charger, with the included DM-20 mast bolting directly to bulldozers without welding. This integration reduces compatibility concerns, simplifies project planning, and provides contractors with everything needed for precision laser-guided blade control.
Type: Integrated Receiver and Mast System
SKU: Spectra Precision LR30-DM
Receiver Model: LR30
Mast Model: DM-20
Battery Type: NiMH Rechargeable

Spectra Precision010459-99SSKU Spectra Precision LR30-DMNew

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Spectra 010459-99S Replacement CLAMPS (2 Pack) for LR30, LR30W, LR50, LR50W, LR60 and LR60W

$42.25

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Battery Type

Runs on NiMH Rechargeable for jobsite flexibility.

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In-stock orders placed before 2 PM CT ship the same day.

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Quick Answer

What is the Spectra Precision 010459-99S?

The Spectra Precision LR30-DM is a complete integrated receiver-and-mast system combining the LR30 laser display receiver with the DM-20 bulldozer mast, featuring no-weld bolt-on installation and included rechargeable batteries for turnkey laser-guided blade control. It's designed for contractors who need immediate precision grading deployment without managing separate component compatibility.

FIELD APPLICATIONS

What contractors use this accessories for

Bulldozer Fleet Laser-Guided Grading

Contractors equip bulldozer fleets with LR30-DM systems to enable laser-guided blade control across multiple machines without managing separate receiver and mast sourcing. The integrated package simplifies fleet standardization and ensures all equipment uses compatible, proven components.

Highway and Parking Lot Finish Grade

Site preparation contractors use the LR30-DM to maintain precise elevation and slope control during finish-grade work on highways, parking lots, and commercial projects. Real-time operator feedback reduces rework and material waste while improving grade consistency across large surface areas.

Slope Cutting and Earthwork Shaping

Grading contractors deploy the LR30-DM for slope cuts, swale creation, and terrain shaping on site development projects where precision elevation control is critical. The rigid DM-20 mast provides stable laser signal reception during active blade cycling.

Quick Equipment Deployment on New Projects

Contractors purchasing grading equipment for immediate job deployment choose the LR30-DM to eliminate setup delays and compatibility concerns. The no-weld installation and included batteries allow operators to begin precision grading work within hours of equipment arrival on site.

Excavation Site Precision Grading

Excavation specialists integrate the LR30-DM into equipment packages for projects requiring laser-guided blade positioning and elevation verification. The system works with existing Spectra Precision laser systems already deployed on job sites, leveraging established survey infrastructure.

PRODUCT OVERVIEW

Product Description

Keep your Spectra rotating lasers field-ready with the Spectra 010459-99S Replacement Clamps 2-Pack. Designed as direct OEM replacement hardware, these universal 2-inch clamps deliver the secure, repeatable clamping action that professional crews depend on when mounting LR30, LR50, and LR60 series rotating lasers to tripods, grade rods, and custom support structures. Whether you're replacing worn clamps on a high-cycle rental unit or stocking spare hardware across a fleet of instruments, the 010459-99S keeps your equipment productive without costly downtime.

Overview & Jobsite Applications

On active construction sites, clamping hardware takes a beating. Daily setups, transport vibration, concrete dust, and rough handling accelerate wear on mounting components that are critical to instrument stability and grade accuracy. Loose or damaged clamps introduce unwanted movement that compromises laser plane consistency — a problem that compounds quickly when crews are shooting elevations for concrete flatwork, pipe runs, or structural steel. The Spectra 010459-99S restores original clamping integrity with hardware engineered to the same tolerances as the factory-installed components, ensuring your laser stays locked on elevation without constant re-checks.

Key Specifications

Part Number: 010459-99S
Clamp Diameter: Universal 2-inch (fits standard contractor tripod legs and grade poles)
Pack Quantity: 2 clamps per package
Compatible Models: Spectra LR30, LR30W, LR50, LR50W, LR60, LR60W rotating lasers
Type: OEM replacement mounting clamps
Application: Tripod, pole, and custom support structure mounting

What's in the Kit

2x Universal 2-inch mounting clamps
Hardware sized for direct compatibility with LR-series rotating laser receivers and brackets
Replacement components matched to original Spectra factory specifications

Job Applications

Concrete Flatwork & Slab Elevation Control: Secure laser mounting is non-negotiable when shooting floor grades. Worn clamps that allow even minor instrument drift will show up in your finished slab. Replacing clamps with genuine Spectra hardware maintains the rigid hold needed for consistent grade control across large pour areas.

Site Grading & Earthwork: Machine control and grade rod work put constant stress on mounting hardware as lasers are repositioned throughout the day. Fresh clamps reduce the risk of mid-shift instrument slippage that can push your cut-and-fill calculations off grade.

Interior Framing & Level Layout: Indoor applications on wall tracks, suspended ceiling grids, and partition layouts require a stable laser plane from the first shot. Secure clamping eliminates the low-frequency drift that can occur with fatigued hardware during extended interior layout sessions.

Rental Fleet Maintenance: Equipment rental operations and large contractor fleets benefit from keeping 010459-99S clamps in inventory as standard consumable maintenance stock. Proactive clamp replacement during scheduled service intervals extends the working life of LR-series instruments and minimizes field returns.

Compatible Accessories

Related Guides

Frequently Asked Questions

Which Spectra laser models are compatible with the 010459-99S clamps?: The 010459-99S clamps are compatible with the full Spectra LR-series lineup, including the LR30, LR30W, LR50, LR50W, LR60, and LR60W rotating lasers. If you're unsure whether these clamps fit your specific configuration, contact our team at Express Tools for verification before ordering.
Are these OEM Spectra parts or aftermarket replacements?: The 010459-99S is a genuine Spectra OEM replacement part, manufactured to the same specifications as the clamps originally installed on LR-series rotating lasers. Express Tools is an authorized Spectra dealer, so you can be confident you're receiving authentic hardware.
What does "universal 2-inch" mean for these clamps?: The 2-inch designation refers to the clamp's compatibility with standard 2-inch diameter contractor tripod legs and mounting poles commonly used in the field. This sizing ensures a secure fit on the most widely used support equipment without the need for adapters.
How many clamps come in one order of 010459-99S?: Each order of the Spectra 010459-99S includes two (2) replacement clamps. This 2-pack format is ideal for replacing both mounting points simultaneously or keeping one unit as a spare during field operations.

Why This Equipment

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In-stock orders placed before 2PM ship same day from our Texas warehouse.

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Call or chat with a contractor equipment specialist before and after your purchase.

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Free ground shipping on orders $99+ to the continental US.

KIT CONTENTS

What's In The Box

LR30 Machine Display Receiver
DM-20 Bulldozer Mast
NiMH Rechargeable Batteries
Battery Charger

Why Buy This?

Professional-grade equipment, authorized dealer pricing.

The tools contractors trust on municipal infrastructure, commercial projects, and high-tolerance earthwork aren't available at hardware stores — and they shouldn't be. This equipment is engineered for professionals, and buying it through an authorized dealer means you get full manufacturer support when it matters.

Express Tools carries only factory-fresh inventory from brands contractors specify by name. No gray-market product, no import-spec units, just authentic gear with legitimate firmware and calibration documentation.

Same-day shipping on in-stock items, expert support before and after the sale, and a 30-day return window on most products. If you have questions about specs, compatibility, or applications, call us — we know this equipment.

TECHNICAL SPECS

Specifications

Technical Specs

Manufacturer data and field-verified measurements.

Knowledge Summary	The Spectra Precision LR30-DM is a complete integrated system combining the LR30 Machine Display Receiver with the DM-20 bulldozer mast, offering a turnkey solution for immediate laser-guided blade control on bulldozers and similar grading equipment. Rather than sourcing receiver and mast separately, the LR30-DM bundles proven components into one coordinated system. The package arrives with rechargeable NiMH batteries and charger, with the included DM-20 mast bolting directly to bulldozers without welding. This integration reduces compatibility concerns, simplifies project planning, and provides contractors with everything needed for precision laser-guided blade control.
Type	Integrated Receiver and Mast System
SKU	Spectra Precision LR30-DM
Receiver Model	LR30
Mast Model	DM-20
Battery Type	NiMH Rechargeable
Key Feature 1	Complete integrated system
Key Feature 2	LR30 receiver with laser detection
Key Feature 3	DM-20 rigid mast included
Key Feature 4	No-weld bolt-on installation
Key Feature 5	Coordinated component integration
Key Feature 6	NiMH batteries and charger included
Key Feature 7	Turnkey laser-guided blade control
Use Cases	Bulldozer blade control installation; Laser-guided grading operations; Earthmoving projects; Blade positioning automation; Precision excavation and grading; New equipment setup
Setup Steps	Mount DM-20 mast to bulldozer blade control point \| Tighten all mounting bolts securely \| Charge LR30 batteries using provided charger \| Install batteries in receiver \| Mount receiver on DM-20 mast \| Calibrate with Spectra Precision laser system \| Test blade control feedback
Pro Tips	Verify all mounting bolts are tight before first operation \| Use thread-locking compound on mast bolts \| Position receiver to minimize cable management complexity \| Perform daily battery charge cycles for optimal performance
Compatible Equipment	Bulldozers with standard mounting points; Trimble Ready machines; Spectra Precision laser systems; LR Series compatible grading equipment
Common Issues	Mast vibration affecting receiver stability \| Battery drain during extended grading operations \| Laser signal intermittency at extreme distances

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