Efforts by safety advocates to make table saws safer for all uses and projects—with a brake that senses the difference between a finger and wood and stops cutting—have entered a new phase. On August 20th, the Consumer Product Safety Commission (CPSC) withdrew its pending rule requiring sensor-activated brakes that had advanced under the Biden administration.
The table saw rule was among several others dropped at the same time by CSPC, whose members appointed by President Donald Trump have taken a deregulatory approach.
In a statement, CSPC Chairman Peter Feldman said “practices that do not reasonably advance safety – but instead promote unscientific ideological agendas, impose unnecessary costs, restrict consumer choice, or reduce competition, entrepreneurship, and innovation – are no longer agency priorities.”
While the safer, more expensive table saws are widely required by major contractors, they have not yet been adopted by smaller ones on smaller projects and by home woodworking hobbyists.
The market for safer table saws, with what’s called Active Injury Mitigations (AIM), has been dominated by Tualatin, Ore.-based SawStop, which was founded in 2000. More recently, competitors have introduced other brands with other injury-mitigating technology.
“Big companies are already using a lot of SawStops or similar technology and it should be encouraged for everyone,” says T.J. Lyons, a former contractor safety director who now serves as an expert witness in lawsuits. “These injuries are needless.”
Although the regulation would not have applied to construction industry work, it would have required blade-sensing systems on all new table saws sold to consumers. That likely would have increased use by smaller contractors and carpenters and improved the overall safety of carpentry and woodwork.
The subject has a long and controversial history.
The braking system uses a small electrical charge sent through the blade to detect contact with human skin and shuts off the saw when it encounters it.
When it detects conductive material, like skin—dry wood does not conduct electricity—the system triggers a brake that stops the blade and reduces potential severe injuries to minor cuts.
But cost and patent issues have limited wider use of blade-sensing technology.
Consumer and construction safety advocates have pushed for mandatory AIM technology since 2003, when SawStop founder Steve Gass and associates petitioned the CPSC for performance standards to reduce blade-contact injuries.
Potential for Avoided Injuries
The CPSC estimates that the proposed rule would have prevented or mitigated the severity of over 49,000 injuries treated annually. Interestingly, a 15-year trend analysis (2004–2018) from the CPSC’s 2019 Table Saw Update showed no reduction in table saw injuries from 2010 to 2018, despite the adoption of a voluntary standard requiring modular blade guards since 2010.
The document highlights a conflict between the 2017 study suggesting the less expensive and more widely available modular blade guards on table saws reduce injury risk by about 85% and National Electronic Injury Surveillance System data showing no injury reduction despite modular blade guard adoption, creating uncertainty about the need for a mandatory AIM rule.
Over the past 20 years, legislative efforts in both California and Illinois pushing for AIM requirements on table saws gained traction for a while but eventually stalled. Manufacturing groups and table saw competitors to SawStop led opposition to the bills citing problems with a potential SawStop monopoly and higher table saw prices.
On the federal level, a House bill called the Preserving Woodworking Traditions and Blocking Government-Mandated Monopolies Act, introduced in April, 2024 by Representatives Marie Gluesenkamp Perez (D-WA) and Jeff Duncan (R-SC), was put forth to delay the CPSC rule until five years after SawStop’s patents expire or are open to other manufacturers.
SawStop’s patent dominance created the monopoly concerns. The Nov. 2023 CPSC document states that it holds over 100 patents although most have expired but its key “840” patent (U.S. Patent No. 9,724,840) expires in 2033, and covers AIM technology. In 2023, SawStop pledged to dedicate the “840” patent to the public if the CPSC rule had been finalized.
SawStop officials could not be immediately be reached for comment on the recent developments.
Cost Concerns and Comparisons
According to the 2019 CPSC 2019 Update, the cost of AIM adoption is $240–$540 per bench saw, $400–$960 per contractor/cabinet saw, plus potential redesign/retooling costs.
This aligns with current prices per SawStop’s website. An entry-level SawStop bench saw retails for approximately $899, compared to $129–$599 for comparable non-AIM saws from brands such as DeWalt or Milwaukee. Contractor-level saws without AIM range from $599–$2,000, while SawStop’s start at $1,999. Cabinet saws, common in professional workshops, cost $1,399–$5,000 without AIM, versus $2,999 and up for SawStop models.
Additional costs occur when the AIM system is activated. It damages the blade—a $50-$200 cost and the $100-$150 cartridge needs to be replaced. Also, the system can falsely activate if the user is working with wet or green wood, which conducts electricity.
For example, homebuilders cutting surface green dimensional wood framing lumber with high moisture content could have many false triggers. Although there is a bypass mode that users can activate. In addition, the AIM system can also be triggered by metal in the wood, like nails and staples under certain conditions.
The CPSC ruling would not have regulated the use of table saws in industrial settings, the commission noted in its response to public comments during its evaluation period.
Although none are as widely available as SawStop, there are other AIM technologies being developed or are already on the market, according to the CPSC’s 2023 document. Felder’s Preventative Contact System (PCS) uses a non-contact electromagnetic field to retract the saw unit before the blade makes contact, preserving the blade and eliminating replacement costs. But it is limited to expensive industrial saws ($15,000 or more).
Bosch has a REAXX system that uses a retracting blade that is not damaged when the system is triggered. A patent infringement lawsuit by SawStop ended its sale in the US. The two companies did come to an agreement in the end but Bosch never resumed REAXX sales. Whirlwind Tool had the Black Box system designed for retrofitting existing table saws, but it is not commercially available due to litigation and funding issues.
It’s unclear whether safety advocates will find another way to try to mandate the AIM system.
There is the potential with the regulation withdrawn, other manufacturers may now feel more confident that offering a less expensive safety system for table saws or a retrofit option will be economically lucrative. If that happens, many more finger-saving choices might be available.
