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Husqvarna FS 400

by Blades Admin

Husqvarna FS 400: Professional Walk-Behind Concrete and Asphalt Saw Built for Precision Cutting

The Husqvarna FS 400 is a professional walk-behind floor saw designed for contractors who need clean, accurate, and repeatable cuts in concrete and asphalt. Known for its balance, durability, and ease of operation, the FS 400 has become a go-to solution for surface cutting applications where control and consistency matter more than extreme cutting depth.

Produced by Husqvarna, the FS 400 is most commonly referenced in the field as the FS 400 LV configuration. It is widely used across residential, commercial, and municipal jobsites for expansion joints, slab work, sidewalk repair, and pavement maintenance.

What Is the Husqvarna FS 400?

The Husqvarna FS 400 is a walk-behind concrete saw engineered for horizontal cutting on flat surfaces. It fills the critical gap between handheld cutoff saws and large road saws. Instead of focusing on maximum depth, the FS 400 emphasizes precision, smooth tracking, and operator control.

Typical uses include:

  • Concrete slab and floor cutting

  • Expansion and control joint cutting

  • Sidewalk, curb, and driveway work

  • Asphalt and pavement repair

  • Utility and maintenance access cuts

Its compact size allows it to perform efficiently in tight or confined areas while still delivering professional-grade cutting performance.

Design Philosophy and Build Quality

Balanced Chassis for Straight Cuts

One of the defining characteristics of the Husqvarna FS 400 is its balanced design. The saw’s weight is distributed evenly over the blade, helping it track straight during cuts. This reduces blade wander, minimizes correction, and improves overall cut quality—especially during long, continuous cuts.

Built for Jobsite Durability

Concrete and asphalt cutting environments are abrasive and demanding. The FS 400 is built with a rugged frame, reinforced blade guard, and durable components designed to withstand slurry, dust, vibration, and frequent transport. This construction makes it suitable for both daily professional use and long-term ownership.

Cutting Performance in Concrete

The Husqvarna FS 400 is widely used for cutting cured and reinforced concrete in:

  • Residential slabs

  • Commercial floors

  • Warehouses and garages

  • Sidewalk panels

When paired with the correct concrete diamond blade, the saw delivers clean edges, consistent depth, and smooth operation across different concrete mixes and aggregate types. Its stability helps maintain uniform cuts even on uneven surfaces.

Cutting Performance in Asphalt

Asphalt is highly abrasive and requires stable blade control. The FS 400 performs exceptionally well in:

  • Road and pavement repair

  • Parking lot maintenance

  • Driveway cutting

  • Patch and trench preparation

Using an asphalt-specific diamond blade allows the FS 400 to cut efficiently while extending blade life and reducing heat buildup.

Blade Size Compatibility

The FS 400 supports multiple blade sizes, giving contractors flexibility to match blade diameter to job requirements. Smaller blades are often used for shallow work and scoring, while larger blades allow deeper cuts for slab and pavement repair.

This versatility allows operators to handle a wide range of cutting tasks without switching machines, making the FS 400 a practical all-around surface saw.

Precision Depth Control

Accurate depth control is critical for professional concrete cutting, particularly when cutting expansion and control joints. The Husqvarna FS 400 features a smooth, responsive depth-adjustment system that allows operators to set and maintain consistent cutting depth throughout the job.

This precision:

  • Improves joint uniformity

  • Reduces rework

  • Enhances overall cut quality

Fine adjustments are easy to make, even while working on uneven surfaces.

Ergonomics and Operator Comfort

Smooth Handling and Low Vibration

The FS 400 is designed to minimize vibration transferred to the operator. Reduced vibration improves comfort during extended cutting sessions and helps maintain control and accuracy over long distances.

Ergonomic Handle Design

The handle layout provides a natural grip and steering position, allowing operators to guide the saw smoothly while maintaining proper posture. This reduces fatigue and improves productivity on longer jobs.

Integrated Wet Cutting System

The Husqvarna FS 400 is designed primarily for wet cutting, which is the preferred method for both concrete and asphalt.

Benefits of wet cutting include:

  • Effective dust suppression

  • Blade cooling

  • Extended diamond blade life

  • Cleaner, smoother cuts

The integrated water system ensures consistent water flow to the blade, helping control silica dust and improve jobsite safety.

Common Applications of the Husqvarna FS 400

Expansion and Control Joints

One of the most common uses of the FS 400 is cutting expansion and control joints in concrete slabs. Its straight-line stability and precise depth control make it ideal for creating uniform joints that help manage cracking and slab movement.

Sidewalk and Curb Work

Municipal crews and contractors rely on the FS 400 for sidewalk and curb repair where accuracy and clean edges are essential.

Pavement and Asphalt Repair

For light-to-medium pavement repair, the FS 400 delivers clean access cuts and well-defined patch boundaries without the bulk of larger road saws.

Utility and Maintenance Projects

Utility contractors use the FS 400 to create access points for pipes, conduits, and cables, especially in areas with limited space.

Diamond Blade Selection for the FS 400

Choosing the correct diamond blade is essential to maximize performance and blade life.

Concrete Diamond Blades

Concrete blades are designed for different hardness levels and aggregate types. Matching the blade to the concrete being cut ensures smooth operation and longer service life.

Asphalt Diamond Blades

Asphalt blades typically feature softer metal bonds and wider gullets to handle the abrasive nature of pavement. Using the correct blade prevents overheating and premature wear.

Blade Safety and Fit

Blades must match the saw’s specifications for diameter and arbor size and must be rated for the saw’s operating speed. Proper fit ensures safe operation and consistent cut quality.

Maintenance and Long-Term Reliability

Routine maintenance keeps the Husqvarna FS 400 operating at peak performance.

Typical maintenance tasks include:

  • Cleaning slurry and debris after use

  • Inspecting belts and bearings

  • Checking blade condition and alignment

  • Verifying water system flow

  • Inspecting fasteners, guards, and controls

With proper care, the FS 400 can deliver many years of dependable professional service.

Safety Considerations

Concrete and asphalt cutting involve inherent risks, and proper safety practices are essential.

Operators should always use:

  • Eye and face protection

  • Hearing protection

  • Respiratory protection when required

  • Gloves with good grip

  • Steel-toe footwear

Ensuring blade guards and water systems are correctly installed before operation is critical for safe use.

Husqvarna FS 400 vs Larger Floor Saws

The FS 400 excels in situations where:

  • Precision matters more than maximum depth

  • Space is limited

  • Portability is important

  • Jobs involve surface cutting rather than deep infrastructure work

For many contractors, it bridges the gap between handheld saws and large road saws.

Who Uses the Husqvarna FS 400?

The FS 400 is commonly used by:

  • Concrete contractors

  • Asphalt repair crews

  • Municipal maintenance teams

  • Utility contractors

  • Property maintenance professionals

Its versatility makes it suitable for both specialized and general cutting tasks.

FAQs About Husqvarna FS 400

What is the Husqvarna FS 400 used for?
It is used for cutting concrete and asphalt on flat surfaces such as slabs, sidewalks, and pavements.

Is the Husqvarna FS 400 a walk-behind saw?
Yes. It is a compact walk-behind floor saw designed for straight horizontal cuts.

Is the FS 400 the same as the FS 400 LV?
In most cases, FS 400 refers to the FS 400 LV configuration commonly used in the field.

Can the FS 400 cut asphalt?
Yes. With an asphalt-specific diamond blade, it performs very well on pavement and asphalt.

Does the FS 400 support wet cutting?
Yes. It includes an integrated water system for dust control and blade cooling.

What types of projects is the FS 400 best for?
It is ideal for residential, light commercial, municipal, and maintenance projects.

Is the FS 400 easy to transport?
Yes. Its compact design allows easy loading, transport, and storage.

What blades can be used with the FS 400?
It supports a wide range of concrete and asphalt diamond blades within its size specifications.

Is the FS 400 designed for professional use?
Yes. It is built specifically for professional contractors and demanding jobsites.

How accurate are cuts made with the FS 400?
The saw offers excellent straight-line tracking and precise depth control.

How long does a Husqvarna FS 400 typically last?
With proper maintenance, it can provide many years of reliable professional service.

Final Thoughts on the Husqvarna FS 400

The Husqvarna FS 400 has earned its reputation as a dependable, precision-focused walk-behind concrete saw. Its balanced construction, smooth handling, and versatility across concrete and asphalt applications make it a valuable tool for contractors who demand clean cuts, consistent depth, and long-term reliability. For surface cutting jobs where control, accuracy, and efficiency matter most, the FS 400 continues to stand out as one of the most trusted options on today’s jobsites.



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