![[THK] — LTR-A Rotary Ball Spline Compact Type (Support Bearing Unit, LTR8A~40A)](https://prosourcemro.com/wp-content/uploads/2026/05/001-970-1024x783.png)
Ball Splines
THK
[THK] — LTR-A Rotary Ball Spline Compact Type (Support Bearing Unit, LTR8A~40A)
Family ID: THK-LTRA
Rotary Ball Spline compact type with integrated support bearing (LTR-A). Shorter overall length than standard LTR type. Enables simultaneous rotary and linear motion. Spline shaft diameters d1: 3.4~9mm, nut OD: φ32~100mm. 4-circuit (LTR8A/10A) or 6-circuit ball arrangement. Standard and K-type (reverse flange) variants. Dust-proof options available (UU/ZZ). Spline shaft length specified on order.
7 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| LTR8A | THK Rotary Ball Spline LTR-A compact, shaft d1=3.4mm, nut OD φ32mm | THK | Spline Shaft Dia.: d1=3.4mm | Nut OD: D=32mm | Spline Bore Dia.: D0=8mm (h7) | Nut Length: L=25mm | Ball Circuits: 4 | Type: Rotary Ball Spline Compact Type with Support Bearing | Mount: Flange (standard / reverse K option) | Dust Proof: UU / ZZ options available | Shaft Length: Specify on order (+L suffix) | ||
| LTR10A | THK Rotary Ball Spline LTR-A compact, shaft d1=3.4mm, nut OD φ36mm | THK | Spline Shaft Dia.: d1=3.4mm | Nut OD: D=36mm | Spline Bore Dia.: D0=10mm (h7) | Nut Length: L=33mm | Ball Circuits: 4 | Type: Rotary Ball Spline Compact Type with Support Bearing | Mount: Flange (standard / reverse K option) | Dust Proof: UU / ZZ options available | Shaft Length: Specify on order (+L suffix) | ||
| LTR16A | THK Rotary Ball Spline LTR-A compact, shaft d1=4.5mm, nut OD φ48mm | THK | Spline Shaft Dia.: d1=4.5mm | Nut OD: D=48mm | Spline Bore Dia.: D0=16mm (h7) | Nut Length: L=50mm | Ball Circuits: 6 | Type: Rotary Ball Spline Compact Type with Support Bearing | Mount: Flange (standard / reverse K option) | Dust Proof: UU / ZZ options available | Shaft Length: Specify on order (+L suffix) | ||
| LTR20A | THK Rotary Ball Spline LTR-A compact, shaft d1=4.5mm, nut OD φ56mm | THK | Spline Shaft Dia.: d1=4.5mm | Nut OD: D=56mm | Spline Bore Dia.: D0=20mm (h7) | Nut Length: L=63mm | Ball Circuits: 6 | Type: Rotary Ball Spline Compact Type with Support Bearing | Mount: Flange (standard / reverse K option) | Dust Proof: UU / ZZ options available | Shaft Length: Specify on order (+L suffix) | ||
| LTR25A | THK Rotary Ball Spline LTR-A compact, shaft d1=5.5mm, nut OD φ66mm | THK | Spline Shaft Dia.: d1=5.5mm | Nut OD: D=66mm | Spline Bore Dia.: D0=25mm (h7) | Nut Length: L=71mm | Ball Circuits: 6 | Type: Rotary Ball Spline Compact Type with Support Bearing | Mount: Flange (standard / reverse K option) | Dust Proof: UU / ZZ options available | Shaft Length: Specify on order (+L suffix) | ||
| LTR32A | THK Rotary Ball Spline LTR-A compact, shaft d1=6.6mm, nut OD φ78mm | THK | Spline Shaft Dia.: d1=6.6mm | Nut OD: D=78mm | Spline Bore Dia.: D0=32mm (h7) | Nut Length: L=80mm | Ball Circuits: 6 | Type: Rotary Ball Spline Compact Type with Support Bearing | Mount: Flange (standard / reverse K option) | Dust Proof: UU / ZZ options available | Shaft Length: Specify on order (+L suffix) | ||
| LTR40A | THK Rotary Ball Spline LTR-A compact, shaft d1=9mm, nut OD φ100mm | THK | Spline Shaft Dia.: d1=9mm | Nut OD: D=100mm | Spline Bore Dia.: D0=40mm (h7) | Nut Length: L=100mm | Ball Circuits: 6 | Type: Rotary Ball Spline Compact Type with Support Bearing | Mount: Flange (standard / reverse K option) | Dust Proof: UU / ZZ options available | Shaft Length: Specify on order (+L suffix) |
