[THK] — LF-X Ball Spline Nut (Medium-Torque, Compact Flange)
Ball Splines THK

[THK] — LF-X Ball Spline Nut (Medium-Torque, Compact Flange)

Family ID: THK-LFX-BALL-SPLINE

THK LF-X type Ball Spline Nut — more compact than standard LF type, flange mounting. XL variants (LF5XL/6XL/8XL) offer extended nut length for higher capacity. Sizes: LF4X–LF30X.

13 product codes available in this family

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Product Codes & Specifications

Product Code Description Brand Spec
LF4X THK LF4X, D=8mm compact flange D1=20mm, CT=0.49N·m THK Model: LF4X | Type: LF-X Ball Spline Nut, Compact Flange, Standard | Shaft D0: 4 mm (h7) | Nut OD D: 8 mm | Flange OD D1: 20 mm | Length with seal L: 14.4 mm | Length no seal L1: 12.0 mm | Dynamic Torque CT: 0.49 N·m | Static Torque C0T: 0.82 N·m | Dynamic Load C: 0.42 kN | Static Load C0: 0.7 kN | Static Moment MA1: 0.84 N·m | Nut Mass (no seal): 4.7 g | Shaft Mass: 0.1 kg/m
LF5X THK LF5X, D=10mm compact flange D1=23mm, CT=0.82N·m THK Model: LF5X | Type: LF-X Ball Spline Nut, Compact Flange, Standard | Shaft D0: 5 mm (h7) | Nut OD D: 10 mm | Flange OD D1: 23 mm | Length with seal L: 15.0 mm | Length no seal L1: 13.6 mm | Dynamic Torque CT: 0.82 N·m | Static Torque C0T: 1.25 N·m | Dynamic Load C: 0.56 kN | Static Load C0: 0.85 kN | Static Moment MA1: 1.04 N·m | Nut Mass (no seal): 9.9 g | Shaft Mass: 0.15 kg/m
LF5XL THK LF5XL, D=10mm compact flange D1=23mm, CT=1.59N·m THK Model: LF5XL | Type: LF-X Ball Spline Nut, Compact Flange, XL (Long) | Shaft D0: 5 mm (h7) | Nut OD D: 10 mm | Flange OD D1: 23 mm | Length with seal L: 26.0 mm | Length no seal L1: 24.6 mm | Dynamic Torque CT: 1.59 N·m | Static Torque C0T: 3.2 N·m | Dynamic Load C: 1.09 kN | Static Load C0: 2.19 kN | Static Moment MA1: 6.11 N·m | Nut Mass (no seal): 14.6 g | Shaft Mass: 0.15 kg/m
LF6X THK LF6X, D=12mm compact flange D1=25mm, CT=1.73N·m THK Model: LF6X | Type: LF-X Ball Spline Nut, Compact Flange, Standard | Shaft D0: 6 mm (h7) | Nut OD D: 12 mm | Flange OD D1: 25 mm | Length with seal L: 19.0 mm | Length no seal L1: 17.6 mm | Dynamic Torque CT: 1.73 N·m | Static Torque C0T: 2.77 N·m | Dynamic Load C: 0.98 kN | Static Load C0: 1.58 kN | Static Moment MA1: 2.85 N·m | Nut Mass (no seal): 13.8 g | Shaft Mass: 0.21 kg/m
LF6XL THK LF6XL, D=12mm compact flange D1=25mm, CT=2.81N·m THK Model: LF6XL | Type: LF-X Ball Spline Nut, Compact Flange, XL (Long) | Shaft D0: 6 mm (h7) | Nut OD D: 12 mm | Flange OD D1: 25 mm | Length with seal L: 30.0 mm | Length no seal L1: 28.6 mm | Dynamic Torque CT: 2.81 N·m | Static Torque C0T: 5.54 N·m | Dynamic Load C: 1.6 kN | Static Load C0: 3.15 kN | Static Moment MA1: 10.6 N·m | Nut Mass (no seal): 20.5 g | Shaft Mass: 0.21 kg/m
LF8X THK LF8X, D=15mm compact flange D1=28mm, CT=6.0N·m THK Model: LF8X | Type: LF-X Ball Spline Nut, Compact Flange, Standard | Shaft D0: 8 mm (h7) | Nut OD D: 15 mm | Flange OD D1: 28 mm | Length with seal L: 25.0 mm | Length no seal L1: 23.8 mm | Dynamic Torque CT: 6.0 N·m | Static Torque C0T: 9.23 N·m | Dynamic Load C: 1.39 kN | Static Load C0: 2.15 kN | Static Moment MA1: 5.13 N·m | Nut Mass (no seal): 26.5 g | Shaft Mass: 0.38 kg/m
LF8XL THK LF8XL, D=15mm compact flange D1=28mm, CT=10.1N·m THK Model: LF8XL | Type: LF-X Ball Spline Nut, Compact Flange, XL (Long) | Shaft D0: 8 mm (h7) | Nut OD D: 15 mm | Flange OD D1: 28 mm | Length with seal L: 40.0 mm | Length no seal L1: 38.8 mm | Dynamic Torque CT: 10.1 N·m | Static Torque C0T: 19.5 N·m | Dynamic Load C: 2.35 kN | Static Load C0: 4.53 kN | Static Moment MA1: 21.1 N·m | Nut Mass (no seal): 36.5 g | Shaft Mass: 0.38 kg/m
LF10X THK LF10X, D=19mm compact flange D1=38mm, CT=9.41N·m THK Model: LF10X | Type: LF-X Ball Spline Nut, Compact Flange, Standard | Shaft D0: 10 mm (h7) | Nut OD D: 19 mm | Flange OD D1: 38 mm | Length with seal L: 33.0 mm | Length no seal L1: 30.8 mm | Dynamic Torque CT: 9.41 N·m | Static Torque C0T: 17.3 N·m | Dynamic Load C: 2.94 kN | Static Load C0: 5.4 kN | Static Moment MA1: 21.5 N·m | Nut Mass (no seal): 66.0 g | Shaft Mass: 0.59 kg/m
LF13X THK LF13X, D=23mm compact flange D1=43mm, CT=17.1N·m THK Model: LF13X | Type: LF-X Ball Spline Nut, Compact Flange, Standard | Shaft D0: 13 mm (h7) | Nut OD D: 23 mm | Flange OD D1: 43 mm | Length with seal L: 36.0 mm | Length no seal L1: 32.4 mm | Dynamic Torque CT: 17.1 N·m | Static Torque C0T: 28.7 N·m | Dynamic Load C: 4.16 kN | Static Load C0: 6.96 kN | Static Moment MA1: 28.9 N·m | Nut Mass (no seal): 82.0 g | Shaft Mass: 1.01 kg/m
LF16X THK LF16X, D=28mm compact flange D1=48mm, CT=42.9N·m THK Model: LF16X | Type: LF-X Ball Spline Nut, Compact Flange, Standard | Shaft D0: 16 mm (h7) | Nut OD D: 28 mm | Flange OD D1: 48 mm | Length with seal L: 50.0 mm | Length no seal L1: 46.4 mm | Dynamic Torque CT: 42.9 N·m | Static Torque C0T: 68.6 N·m | Dynamic Load C: 8.4 kN | Static Load C0: 13.4 kN | Static Moment MA1: 77.4 N·m | Nut Mass (no seal): 131.0 g | Shaft Mass: 1.52 kg/m
LF20X THK LF20X, D=32mm compact flange D1=54mm, CT=66.4N·m THK Model: LF20X | Type: LF-X Ball Spline Nut, Compact Flange, Standard | Shaft D0: 20 mm (h7) | Nut OD D: 32 mm | Flange OD D1: 54 mm | Length with seal L: 63.0 mm | Length no seal L1: 59.0 mm | Dynamic Torque CT: 66.4 N·m | Static Torque C0T: 117.0 N·m | Dynamic Load C: 10.5 kN | Static Load C0: 18.6 kN | Static Moment MA1: 144.0 N·m | Nut Mass (no seal): 212.0 g | Shaft Mass: 2.41 kg/m
LF25X THK LF25X, D=40mm compact flange D1=62mm, CT=125.0N·m THK Model: LF25X | Type: LF-X Ball Spline Nut, Compact Flange, Standard | Shaft D0: 25 mm (h7) | Nut OD D: 40 mm | Flange OD D1: 62 mm | Length with seal L: 71.0 mm | Length no seal L1: 67.0 mm | Dynamic Torque CT: 125.0 N·m | Static Torque C0T: 207.0 N·m | Dynamic Load C: 15.9 kN | Static Load C0: 26.2 kN | Static Moment MA1: 230.0 N·m | Nut Mass (no seal): 335.0 g | Shaft Mass: 3.71 kg/m
LF30X THK LF30X, D=45mm compact flange D1=74mm, CT=196.0N·m THK Model: LF30X | Type: LF-X Ball Spline Nut, Compact Flange, Standard | Shaft D0: 30 mm (h7) | Nut OD D: 45 mm | Flange OD D1: 74 mm | Length with seal L: 80.0 mm | Length no seal L1: 75.6 mm | Dynamic Torque CT: 196.0 N·m | Static Torque C0T: 319.0 N·m | Dynamic Load C: 20.8 kN | Static Load C0: 34.0 kN | Static Moment MA1: 335.0 N·m | Nut Mass (no seal): 489.0 g | Shaft Mass: 5.37 kg/m

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