|Fit Classification||No-Load Breakaway Torque (in-lb)||Description|
|F1||6.0 – 24.0||Extremely tight. Users may need the assistance of mechanical advantage/leverage, such as a steel bar through the bore, to move the ball.|
|F2||2.0 – 6.0||Moderately tight. Users should be able to move the ball by hand, but noticable resistance will be felt.|
|F3||0.0 – 1.0||No clearance present in the bearing, however, the ball will move freely with light to moderate finger pressure, with very light resistance felt.|
- PTFE lined bearings are self-lubricating and maintenance free.
- F2 is the FK standard fit unless specified otherwise.
- To designate an F1 or F3 fit, please add the suffix “-F1” or “-F3” to our standard part number. Example: JMX12T-F3
- These fits are available on PTFE lined product only.