A: The Forney 140 FC-i (261) has three specific voltages that have been tested for duty cycle. 100% at 16.3V, 60% at 17%, 24% at 18.5V. As you would likely have the unit turned up to the maximum voltage for 1/4", which at 20V is higher than the rated 18.5V, it will be less than 24% duty cycle. As duty cycle is not a equation, it is a tested number, we do not have the specific duty cycle percentages for all settings. Thank you for you question.
A: In order to weld stainless steel you will need to be able to switch polarity, the most similar machine we have that is capable of this would be the Forney 140 MP (271). Thank you for your question!
A: The Forney 140FC-i (261) comes with a 1 year warranty. During that time if you experience any issues with your machine please reach out to us at 1-800-521-6038. We will be happy to assist you. For issues that arise beyond the warranty period, I would still advise to reach out to us so we can troubleshoot and find the root cause. Also, we are the only place to purchase warranty parts. In general we at Forney engineer our machines in such a way that anyone could repair the unit with minimal skill required. Likely, after purchasing a repair part, you could perform the repair. Thank you for your question.
A: 110V and 120V are generally seen as synonymous. All Forney welders that are rated for 120V can be run on 110V, as generally that is the same amount of power, just be sure not to hook the 140FC-i up to 220V as that will damage the unit. Thank you for your question.
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