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Contractor Saw 30" Aluminum Extrusion Fence and Rail Kit

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SawStop CNS175-SFA30 - Contractor Saw 30" Aluminum Extrusion Fence and Rail Kit

SawStop table saws are the most advanced saws in the world, setting the standard for table saw safety.

SawStop saws are equipped with a safety system that detects when someone accidentally contacts the spinning saw blade, and then stops the blade in milliseconds. In most cases, such an accident would result in just a nick on a SawStop saw, instead of the devastating injury which would likely occur on an ordinary table saw.

The system induces an electrical signal onto the blade and then monitors that signal for changes. The human body has a relatively large inherent electrical capacitance and conductivity, which cause the signal to drop when a person contacts the blade. Wood has a relatively small inherent capacitance and conductivity and does not cause the signal to drop.

The electrical signal drops quickly when the blade touches the finger. When the detection system sees dips like these, it knows a person has touched the blade.

In order to stop the saw, a fast-acting brake stops the blade when contact is detected. The brake includes a heavy-duty spring to push a block of aluminum, called a brake pawl, into the teeth of the blade to stop the blade from spinning. The spring is held in compression by a fuse wire until contact is detected. When contact is detected, the system sends a surge of electricity through the fuse wire to burn the wire and release the spring. The spring pushes the brake pawl into the teeth of the spinning blade, and the teeth cut into the aluminum and bind, thereby stopping the blade. All this happens in about 3–5 milliseconds, or 1/200th of a second. At the same time, the angular momentum of the blade causes the blade to retract below the table and the power to the motor is shut off.

The aluminum brake pawl pivots into the teeth of the blade. The brake pawl is part of a replaceable cartridge that includes the spring, fuse wire and electronics necessary to burn the fuse wire. An optional dado cartridge provides the same protection for dado cuts.

The standard and dado brake cartridges are single-use components that must be changed if the brake is ever activated. Changing a brake cartridge is fast and easy, no more complicated than changing the blade.

SawStop didn’t stop at their patented safety system.
The SawStop® Professional Cabinet Saw has several other features to help operators stay safe.

  • SawStop safety system prevents serious injury with always-on protection.
  • It’s better when the guard stays on. The low profile blade guard can be used even on narrow cuts, which means you can take advantage of the added protection of the blade guard, even on cuts as narrow as ¾ of an inch.
  • Riving knife minimizes kickback and provides protection during non-through cuts.
  • Keep dust where it should be – out of your lungs. The blade is well shrouded to improve dust collection and reduce airborne particulates. The shroud tapers to a 4” port for direct connection to a dust collection system. When properly connected, the Contractor Saw boasts more effective dust collection than many hybrid table saws.
  • No rough edges. The zero-clearance insert supports the wood throughout the cut and reduces tear-out and chip-out.
  • We double-check the saw every time you turn it on. A diagnostic self-check runs
    continuously when you start the saw to ensure all systems are ready to detect
    an accident.
  • Sometimes you have your hands full and really need to turn off the saw. Our large start/stop paddle with hands-free shutoff can be stopped with your knee allowing you to safely stop the blade even when both hands are busy. The paddle is located on the left side of the saw to minimize accidental shut off.
  • Never worry again about someone using your saw when you’re not around. The main power switch with lockout key prevents unauthorized users from operating the saw.
  • When the power goes out, the saw stays off. The safety system won’t allow the motor to restart automatically when the power comes back on.
  • Left-tilting blade helps prevent wood from binding against the fence.

Includes aluminum extrusion fence & 30" rails.

(with motor):

58 1/2" w, 40" d, 34 3/4" h


1.75 HP, 110-120V, 15A

User-configurable to 220-240V, 7.5A

Footprint: 25 3/4" w, 27" d
Cast iron table: 20" w, 27" d
Extension wing: 12" w, 27" d
Shipping weight (approx.): 280 lbs.
Blade: 10" diameter, 5/8" arbor
Blade tilt: Left
Maximum depth of cut: 3 1/8"
Dado diameter: 8"
Dado max. width: 13/16"
Dust collection port: 4" diameter
Insert: Zero-clearance
Blade guard: Polycarbonate, thin profile
Riving knife / splitter: 2mm thick

SawStop warrants to the original retail purchaser of a new contractor saw from an authorized SawStop distributor that the saw will be free from defects in material and workmanship for ONE YEAR from the date of purchase. SawStop warrants to the original retail purchaser of a refurbished, demonstration or floor model contractor saw from an authorized SawStop distributor that the saw will be free from defects in material and workmanship for SIX MONTHS from the date of purchase.

This warranty does not apply to defects arising from misuse, abuse, negligence, accidents, normal wear-and-tear, unauthorized repair or alteration, or lack of maintenance. This warranty is void if the saw or any portion of the saw is modified without the prior written permission of SawStop, LLC, or if the saw is located or has been operated outside of the country where the authorized SawStop distributor from whom the saw was purchased resides.

Please contact SawStop to take advantage of this warranty. If SawStop determines the saw is defective in material or workmanship, and not due to misuse, abuse, negligence, accidents, normal wear-and-tear, unauthorized repair or alteration, or lack of maintenance, then SawStop will, at its expense, and upon proof of purchase, send replacement parts to the original retail purchaser necessary to cure the defect. Alternatively, SawStop will repair the saw provided it is returned to SawStop, shipping prepaid, with proof of purchase and within the warranty period.

SawStop disclaims any and all other express or implied warranties, including merchantability and fitness for a particular purpose. SawStop shall not be liable for death, injuries to persons or property, or incidental, consequential, contingent or special damages arising from the use of the saw.

This warranty gives you specific legal rights. You may have other rights, which vary from state to state.


No Warranty of Safety

It is important to understand that SawStop® saws do not prevent injuries. They work to minimize the severity of injuries. In fact, an injury must occur before the SawStop® safety system reacts. The severity of the injury will depend on the speed at which a person contacts the spinning blade. You may incur a serious injury on a SawStop® saw. If you decide to use the saw in Bypass Mode, the safety system will be disabled and it will not activate in the event you contact the spinning blade.

Related Products:

SawStop 10" Blade Brake Cartridge for ICS, CNS & PCS saws
SawStop 8" Dado Brake Cartridge for ICS, PCS & CNS saws
Mobile Base for SawStop Contractor Saw
Pair (2) Cast Iron Wings for SawStop Contractor Saw
OFT30-CNS-000 30" Outfeed Table for SawStop CNS & PCS
MC-CNS SawStop Job Site Cart Mobile Base
CNS-DCP Dust Collection Panel for SawStop Contractor Saw
TSI-SLD Standard Lock-Down Insert NEW
TSI-DLD Lock-Down Dado Insert NEW
TSG-DC Dust Collection Blade Guard
TSA-ODC Over-Arm Dust Collection Arm
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