• THK LT-X Ball Spline Nut (Medium-Torque, Compact)
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THK LT-X Ball Spline Nut (Medium-Torque, Compact)

THK LT-X Ball Spline Nut (Medium-Torque, Compact)

THK LT-X type Ball Spline Nut — more compact than standard LT type.

Key features

  • Available with seal (L) and without seal (L1) configurations
  • XL variants (LT5XL/6XL/8XL) offer extended nut length for higher capacity
  • Sizes: LT4X–LT30X
LT4X THK LT4X, D=8mm compact, CT=0.49N·m C0T=0.82N·m | Model: LT4X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 4 mm (h7) | Nut OD D: 8 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): 2.2 g | Shaft Mass: 0.1 kg/m
LT5X THK LT5X, D=10mm compact, CT=0.82N·m C0T=1.25N·m | Model: LT5X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 5 mm (h7) | Nut OD D: 10 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): 3.3 g | Shaft Mass: 0.15 kg/m
LT5XL THK LT5XL, D=10mm compact, CT=1.59N·m C0T=3.2N·m | Model: LT5XL | Type: LT-X Ball Spline Nut, Medium-Torque Compact, XL (Long) | Shaft D0: 5 mm (h7) | Nut OD D: 10 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): 8.0 g | Shaft Mass: 0.15 kg/m
LT6X THK LT6X, D=12mm compact, CT=1.73N·m C0T=2.77N·m | Model: LT6X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 6 mm (h7) | Nut OD D: 12 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): 6.6 g | Shaft Mass: 0.21 kg/m
LT6XL THK LT6XL, D=12mm compact, CT=2.81N·m C0T=5.54N·m | Model: LT6XL | Type: LT-X Ball Spline Nut, Medium-Torque Compact, XL (Long) | Shaft D0: 6 mm (h7) | Nut OD D: 12 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): 13.3 g | Shaft Mass: 0.21 kg/m
LT8X THK LT8X, D=15mm compact, CT=6.0N·m C0T=9.23N·m | Model: LT8X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 8 mm (h7) | Nut OD D: 15 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): 14.3 g | Shaft Mass: 0.38 kg/m
LT8XL THK LT8XL, D=15mm compact, CT=10.1N·m C0T=19.5N·m | Model: LT8XL | Type: LT-X Ball Spline Nut, Medium-Torque Compact, XL (Long) | Shaft D0: 8 mm (h7) | Nut OD D: 15 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): 24.3 g | Shaft Mass: 0.38 kg/m
LT10X THK LT10X, D=19mm compact, CT=9.41N·m C0T=17.3N·m | Model: LT10X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 10 mm (h7) | Nut OD D: 19 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): 30.0 g | Shaft Mass: 0.59 kg/m
LT13X THK LT13X, D=23mm compact, CT=17.1N·m C0T=28.7N·m | Model: LT13X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 13 mm (h7) | Nut OD D: 23 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): 40.0 g | Shaft Mass: 1.01 kg/m
LT16X THK LT16X, D=28mm compact, CT=42.9N·m C0T=68.6N·m | Model: LT16X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 16 mm (h7) | Nut OD D: 28 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): 81.0 g | Shaft Mass: 1.52 kg/m
LT20X THK LT20X, D=32mm compact, CT=66.4N·m C0T=117.0N·m | Model: LT20X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 20 mm (h7) | Nut OD D: 32 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): 130.0 g | Shaft Mass: 2.41 kg/m
LT25X THK LT25X, D=40mm compact, CT=125.0N·m C0T=207.0N·m | Model: LT25X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 25 mm (h7) | Nut OD D: 40 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): 235.0 g | Shaft Mass: 3.71 kg/m
LT30X THK LT30X, D=45mm compact, CT=196.0N·m C0T=319.0N·m | Model: LT30X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 30 mm (h7) | Nut OD D: 45 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): 295.0 g | Shaft Mass: 5.37 kg/m
Ball SplinesTHK
13 product codes available in this family
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THK LT-X Ball Spline Nut (Medium-Torque, Compact)

Brand THK·Ball Splines

Available part numbers (13)

LT4X, LT5X, LT5XL, LT6X, LT6XL, LT8X, LT8XL, LT10X, LT13X, LT16X + 3 more — see full table ↓

How to order

Send the THK part numbers and quantities through our RFQ form or to info@prosourcemro.com. We confirm price, availability and lead time within 1 business day — no account needed.

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Product codes & specifications
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RFQ List (0)
Product codeSpec
LT4XTHK LT4X, D=8mm compact, CT=0.49N·m C0T=0.82N·m | Model: LT4X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 4 mm (h7) | Nut OD D: 8 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): 2.2 g | Shaft Mass: 0.1 kg/m
LT5XTHK LT5X, D=10mm compact, CT=0.82N·m C0T=1.25N·m | Model: LT5X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 5 mm (h7) | Nut OD D: 10 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): 3.3 g | Shaft Mass: 0.15 kg/m
LT5XLTHK LT5XL, D=10mm compact, CT=1.59N·m C0T=3.2N·m | Model: LT5XL | Type: LT-X Ball Spline Nut, Medium-Torque Compact, XL (Long) | Shaft D0: 5 mm (h7) | Nut OD D: 10 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): 8.0 g | Shaft Mass: 0.15 kg/m
LT6XTHK LT6X, D=12mm compact, CT=1.73N·m C0T=2.77N·m | Model: LT6X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 6 mm (h7) | Nut OD D: 12 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): 6.6 g | Shaft Mass: 0.21 kg/m
LT6XLTHK LT6XL, D=12mm compact, CT=2.81N·m C0T=5.54N·m | Model: LT6XL | Type: LT-X Ball Spline Nut, Medium-Torque Compact, XL (Long) | Shaft D0: 6 mm (h7) | Nut OD D: 12 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): 13.3 g | Shaft Mass: 0.21 kg/m
LT8XTHK LT8X, D=15mm compact, CT=6.0N·m C0T=9.23N·m | Model: LT8X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 8 mm (h7) | Nut OD D: 15 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): 14.3 g | Shaft Mass: 0.38 kg/m
LT8XLTHK LT8XL, D=15mm compact, CT=10.1N·m C0T=19.5N·m | Model: LT8XL | Type: LT-X Ball Spline Nut, Medium-Torque Compact, XL (Long) | Shaft D0: 8 mm (h7) | Nut OD D: 15 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): 24.3 g | Shaft Mass: 0.38 kg/m
LT10XTHK LT10X, D=19mm compact, CT=9.41N·m C0T=17.3N·m | Model: LT10X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 10 mm (h7) | Nut OD D: 19 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): 30.0 g | Shaft Mass: 0.59 kg/m
LT13XTHK LT13X, D=23mm compact, CT=17.1N·m C0T=28.7N·m | Model: LT13X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 13 mm (h7) | Nut OD D: 23 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): 40.0 g | Shaft Mass: 1.01 kg/m
LT16XTHK LT16X, D=28mm compact, CT=42.9N·m C0T=68.6N·m | Model: LT16X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 16 mm (h7) | Nut OD D: 28 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): 81.0 g | Shaft Mass: 1.52 kg/m
LT20XTHK LT20X, D=32mm compact, CT=66.4N·m C0T=117.0N·m | Model: LT20X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 20 mm (h7) | Nut OD D: 32 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): 130.0 g | Shaft Mass: 2.41 kg/m
LT25XTHK LT25X, D=40mm compact, CT=125.0N·m C0T=207.0N·m | Model: LT25X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 25 mm (h7) | Nut OD D: 40 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): 235.0 g | Shaft Mass: 3.71 kg/m
LT30XTHK LT30X, D=45mm compact, CT=196.0N·m C0T=319.0N·m | Model: LT30X | Type: LT-X Ball Spline Nut, Medium-Torque Compact, Standard | Shaft D0: 30 mm (h7) | Nut OD D: 45 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): 295.0 g | Shaft Mass: 5.37 kg/m

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