![[THK] — Link Ball BL / BL-A](https://prosourcemro.com/wp-content/uploads/2026/05/001-1064-1024x741.png)
Roller Guides
THK
[THK] — Link Ball BL / BL-A
Family ID: THK-BL
THK BL / BL-A type Link Ball. Holder connected perpendicular to ball stud. Grease pockets molded at top and bottom of spherical contact for high lubrication and wear resistance. BL4DA/BL5DA (BL-A type): A-1 alloy holder (lightweight). BL6D~BL16BD: high-strength zinc alloy holder. D type: fine thread; BD type: coarse thread. Left-hand thread: L engraved on cap. Shaft diameter d2 = 4~16mm. Allowable tilt: 40° (BL4~14) / 30° (BL16).
12 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| BL4DA | THK Link Ball BL4DA, d2=4mm, thread=M4×0.7, Da=7.938mm, Cs=4510N | THK | Shaft Diameter (d2): 4 mm | Total Length (L): 24.5 mm | Holder Diameter (D): 13 mm | Thread: M4×0.7 (Fine) | Ball Diameter (Da): 7.938 mm | Allowable Tilt Angle (2θ): ±40° | Static Load Capacity (Cs): 4510 N | Yield Point Strength (Pk): 1370 N | Mass: 7 g | Holder Material: A-1 alloy (BL-A type) | Stud Material: S35C (20~28HRC), chromate treatment | Lubrication: Lithium grease No.2 (boot + cap) | Recommended Mating Hole: H10 | Left-hand thread: L engraved on cap | ||
| BL5DA | THK Link Ball BL5DA, d2=5mm, thread=M5×0.8, Da=9.525mm, Cs=6470N | THK | Shaft Diameter (d2): 5 mm | Total Length (L): 34.5 mm | Holder Diameter (D): 15 mm | Thread: M5×0.8 (Fine) | Ball Diameter (Da): 9.525 mm | Allowable Tilt Angle (2θ): ±40° | Static Load Capacity (Cs): 6470 N | Yield Point Strength (Pk): 2250 N | Mass: 12 g | Holder Material: A-1 alloy (BL-A type) | Stud Material: S35C (20~28HRC), chromate treatment | Lubrication: Lithium grease No.2 (boot + cap) | Recommended Mating Hole: H10 | Left-hand thread: L engraved on cap | ||
| BL6D | THK Link Ball BL6D, d2=6mm, thread=M6×1, Da=11.112mm, Cs=9900N | THK | Shaft Diameter (d2): 6 mm | Total Length (L): 38.0 mm | Holder Diameter (D): 16 mm | Thread: M6×1 (Fine) | Ball Diameter (Da): 11.112 mm | Allowable Tilt Angle (2θ): ±40° | Static Load Capacity (Cs): 9900 N | Yield Point Strength (Pk): 3920 N | Mass: 26 g | Holder Material: High-strength zinc alloy | Stud Material: S35C (20~28HRC), chromate treatment | Lubrication: Lithium grease No.2 (boot + cap) | Recommended Mating Hole: H10 | Left-hand thread: L engraved on cap | ||
| BL8D | THK Link Ball BL8D, d2=8mm, thread=M8×1.25, Da=12.7mm, Cs=12500N | THK | Shaft Diameter (d2): 8 mm | Total Length (L): 45.5 mm | Holder Diameter (D): 19 mm | Thread: M8×1.25 (Fine) | Ball Diameter (Da): 12.7 mm | Allowable Tilt Angle (2θ): ±40° | Static Load Capacity (Cs): 12500 N | Yield Point Strength (Pk): 6570 N | Mass: 49 g | Holder Material: High-strength zinc alloy | Stud Material: S35C (20~28HRC), chromate treatment | Lubrication: Lithium grease No.2 (boot + cap) | Recommended Mating Hole: H10 | Left-hand thread: L engraved on cap | ||
| BL10D | THK Link Ball BL10D, d2=10mm, thread=M10×1.25, Da=15.875mm, Cs=18300N | THK | Shaft Diameter (d2): 10 mm | Total Length (L): 55.5 mm | Holder Diameter (D): 25 mm | Thread: M10×1.25 (Fine) | Ball Diameter (Da): 15.875 mm | Allowable Tilt Angle (2θ): ±40° | Static Load Capacity (Cs): 18300 N | Yield Point Strength (Pk): 11300 N | Mass: 87 g | Holder Material: High-strength zinc alloy | Stud Material: S35C (20~28HRC), chromate treatment | Lubrication: Lithium grease No.2 (boot + cap) | Recommended Mating Hole: H10 | Left-hand thread: L engraved on cap | ||
| BL10BD | THK Link Ball BL10BD, d2=10mm, thread=M10×1.5, Da=15.875mm, Cs=18300N | THK | Shaft Diameter (d2): 10 mm | Total Length (L): 55.5 mm | Holder Diameter (D): 25 mm | Thread: M10×1.5 (Coarse) | Ball Diameter (Da): 15.875 mm | Allowable Tilt Angle (2θ): ±40° | Static Load Capacity (Cs): 18300 N | Yield Point Strength (Pk): 11300 N | Mass: 90 g | Holder Material: High-strength zinc alloy | Stud Material: S35C (20~28HRC), chromate treatment | Lubrication: Lithium grease No.2 (boot + cap) | Recommended Mating Hole: H10 | Left-hand thread: L engraved on cap | ||
| BL12D | THK Link Ball BL12D, d2=12mm, thread=M12×1.25, Da=19.05mm, Cs=26700N | THK | Shaft Diameter (d2): 12 mm | Total Length (L): 64.5 mm | Holder Diameter (D): 29 mm | Thread: M12×1.25 (Fine) | Ball Diameter (Da): 19.05 mm | Allowable Tilt Angle (2θ): ±40° | Static Load Capacity (Cs): 26700 N | Yield Point Strength (Pk): 16400 N | Mass: 143 g | Holder Material: High-strength zinc alloy | Stud Material: S35C (20~28HRC), chromate treatment | Lubrication: Lithium grease No.2 (boot + cap) | Recommended Mating Hole: H10 | Left-hand thread: L engraved on cap | ||
| BL12BD | THK Link Ball BL12BD, d2=12mm, thread=M12×1.75, Da=19.05mm, Cs=26700N | THK | Shaft Diameter (d2): 12 mm | Total Length (L): 64.5 mm | Holder Diameter (D): 29 mm | Thread: M12×1.75 (Coarse) | Ball Diameter (Da): 19.05 mm | Allowable Tilt Angle (2θ): ±40° | Static Load Capacity (Cs): 26700 N | Yield Point Strength (Pk): 16400 N | Mass: 148 g | Holder Material: High-strength zinc alloy | Stud Material: S35C (20~28HRC), chromate treatment | Lubrication: Lithium grease No.2 (boot + cap) | Recommended Mating Hole: H10 | Left-hand thread: L engraved on cap | ||
| BL14D | THK Link Ball BL14D, d2=14mm, thread=M14×1.5, Da=22.225mm, Cs=36400N | THK | Shaft Diameter (d2): 14 mm | Total Length (L): 74.0 mm | Holder Diameter (D): 34 mm | Thread: M14×1.5 (Fine) | Ball Diameter (Da): 22.225 mm | Allowable Tilt Angle (2θ): ±40° | Static Load Capacity (Cs): 36400 N | Yield Point Strength (Pk): 19800 N | Mass: 235 g | Holder Material: High-strength zinc alloy | Stud Material: S35C (20~28HRC), chromate treatment | Lubrication: Lithium grease No.2 (boot + cap) | Recommended Mating Hole: H10 | Left-hand thread: L engraved on cap | ||
| BL14BD | THK Link Ball BL14BD, d2=14mm, thread=M14×2, Da=22.225mm, Cs=36400N | THK | Shaft Diameter (d2): 14 mm | Total Length (L): 74.0 mm | Holder Diameter (D): 34 mm | Thread: M14×2 (Coarse) | Ball Diameter (Da): 22.225 mm | Allowable Tilt Angle (2θ): ±40° | Static Load Capacity (Cs): 36400 N | Yield Point Strength (Pk): 19800 N | Mass: 245 g | Holder Material: High-strength zinc alloy | Stud Material: S35C (20~28HRC), chromate treatment | Lubrication: Lithium grease No.2 (boot + cap) | Recommended Mating Hole: H10 | Left-hand thread: L engraved on cap | ||
| BL16D | THK Link Ball BL16D, d2=16mm, thread=M16×1.5, Da=22.225mm, Cs=36400N | THK | Shaft Diameter (d2): 16 mm | Total Length (L): 83.0 mm | Holder Diameter (D): 38 mm | Thread: M16×1.5 (Fine) | Ball Diameter (Da): 22.225 mm | Allowable Tilt Angle (2θ): ±30° | Static Load Capacity (Cs): 36400 N | Yield Point Strength (Pk): 26900 N | Mass: 315 g | Holder Material: High-strength zinc alloy | Stud Material: S35C (20~28HRC), chromate treatment | Lubrication: Lithium grease No.2 (boot + cap) | Recommended Mating Hole: H10 | Left-hand thread: L engraved on cap | ||
| BL16BD | THK Link Ball BL16BD, d2=16mm, thread=M16×2, Da=22.225mm, Cs=36400N | THK | Shaft Diameter (d2): 16 mm | Total Length (L): 83.0 mm | Holder Diameter (D): 38 mm | Thread: M16×2 (Coarse) | Ball Diameter (Da): 22.225 mm | Allowable Tilt Angle (2θ): ±30° | Static Load Capacity (Cs): 36400 N | Yield Point Strength (Pk): 26900 N | Mass: 325 g | Holder Material: High-strength zinc alloy | Stud Material: S35C (20~28HRC), chromate treatment | Lubrication: Lithium grease No.2 (boot + cap) | Recommended Mating Hole: H10 | Left-hand thread: L engraved on cap |
