The FK One Adjust redefines versatility and power. Engineered with true FK performance, artist-first ergonomics, and next-level precision—this is your all-in-one tattoo machine built to adapt to any style or technique.
REVOLUTIONARY STROKE CONTROL
Our patent-pending Adjustable Stroke Technology lets you fine-tune your stroke from 2.0 mm to 5.0 mm in 0.5 mm increments—without ever powering down. Instantly adapt to any task, from bold linework to soft shading.
ARTIST-FIRST DESIGN
Created with direct artist input, the FK One Adjust is balanced, comfortable, and ready for long sessions. Expect consistent FK power, precision, and reliability—every single time.
UNMATCHED VERSATILITY
No need to switch machines. The FK One Adjust handles every technique—lining, shading, packing, and detailing—all with smooth, seamless control.
INNOVATION THAT DELIVERS
Change your stroke on the fly. Unlike traditional systems, the FK One Adjust keeps you working without interruption, giving you real-time adaptability mid-session.
TOTAL CLARITY & CONTROL
The upgraded digital display shows your output in volts or hertz, whichever you prefer. Hertz mode reveals true machine frequency for precise needle movement tracking.
BUILT TO LAST
Reliable. Durable. Backed by FK’s upgraded global service program, so you’re covered wherever you work.
KEY FEATURES
✅ Adjustable Stroke: Change stroke length instantly—no power-down needed.
✅ Wide Stroke Range: 2.0 mm – 5.0 mm for maximum versatility.
✅ Dual Display: Switch between volts / hertz readouts.
✅ Ambidextrous Setup: Screen flips for right- or left-handed artists.
✅ Ergonomic Grip: Designed for balance and long-term comfort.
✅ Consistent FK Power: Delivers signature FK performance every session.
✅ Modular Ready: Compatible with FK Irons modular grips.
✅ Premium Brushed Motor: Smooth, steady, and efficient power delivery.
ENGINEERED FOR ELITE PERFORMANCE
Inside, a precision-engineered motor pairs a fixed-stroke cam with a refined paddle and slider system. The result? Constant-load performance, reduced friction, and unmatched longevity—all while maintaining smooth, powerful output.
TECH SPECS
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Voltage Range: 5 V – 12 V (0.2 V increments)
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Max Output Current: 1 A
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Size: 152 mm × 38 mm
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Weight: 244 g (8.6 oz) with 18500A battery | 268 g (9.5 oz) with 18650A battery
BATTERY SYSTEM
Includes two rechargeable Panasonic batteries with interchangeable caps.
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18500A (short cap 0.25") → ~5.5 hours runtime
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18650A (long cap 0.75") → ~6.5 hours runtime
Battery life varies based on voltage, stroke, and usage conditions.
