![[THK] — BNK2020K-3.6 Ball Screw (Shaft φ20, Lead 20mm)](https://img.prosourcemro.com/2026/05/001-824-1024x847.png)
Ball Screws
THK
[THK] — BNK2020K-3.6 Ball Screw (Shaft φ20, Lead 20mm)
Family ID: THK-BNK2020K-3.6
THK BNK Series Precision Ground Ball Screw, shaft diameter φ20mm, lead 20mm. 1.8 turns × 2 rows ball circuit, End Cap return type. Available in G0 (zero clearance) and G2 (standard) with C5/C7 lead accuracy grade. Flanged nut with pre-machined shaft end (BNK finished type). Note: Low-noise type (K variant).
18 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| BNK2020K-3.6G0+520LC5K | THK BNK2020K-3.6, φ20 Lead20, Stroke 300mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 300mm | Screw Length L3: 520mm | L2: 435mm | L1: 410mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G2+520LC7K | THK BNK2020K-3.6, φ20 Lead20, Stroke 300mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 300mm | Screw Length L3: 520mm | L2: 435mm | L1: 410mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G0+620LC5K | THK BNK2020K-3.6, φ20 Lead20, Stroke 400mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 400mm | Screw Length L3: 620mm | L2: 535mm | L1: 510mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G2+620LC7K | THK BNK2020K-3.6, φ20 Lead20, Stroke 400mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 400mm | Screw Length L3: 620mm | L2: 535mm | L1: 510mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G0+720LC5K | THK BNK2020K-3.6, φ20 Lead20, Stroke 500mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 500mm | Screw Length L3: 720mm | L2: 635mm | L1: 610mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G2+720LC7K | THK BNK2020K-3.6, φ20 Lead20, Stroke 500mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 500mm | Screw Length L3: 720mm | L2: 635mm | L1: 610mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G0+820LC5K | THK BNK2020K-3.6, φ20 Lead20, Stroke 600mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 600mm | Screw Length L3: 820mm | L2: 735mm | L1: 710mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G2+820LC7K | THK BNK2020K-3.6, φ20 Lead20, Stroke 600mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 600mm | Screw Length L3: 820mm | L2: 735mm | L1: 710mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G0+920LC5K | THK BNK2020K-3.6, φ20 Lead20, Stroke 700mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 700mm | Screw Length L3: 920mm | L2: 835mm | L1: 810mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G2+920LC7K | THK BNK2020K-3.6, φ20 Lead20, Stroke 700mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 700mm | Screw Length L3: 920mm | L2: 835mm | L1: 810mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G0+1020LC5K | THK BNK2020K-3.6, φ20 Lead20, Stroke 800mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 800mm | Screw Length L3: 1020mm | L2: 935mm | L1: 910mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G2+1020LC7K | THK BNK2020K-3.6, φ20 Lead20, Stroke 800mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 800mm | Screw Length L3: 1020mm | L2: 935mm | L1: 910mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G0+1120LC5K | THK BNK2020K-3.6, φ20 Lead20, Stroke 900mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 900mm | Screw Length L3: 1120mm | L2: 1035mm | L1: 1010mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G2+1120LC7K | THK BNK2020K-3.6, φ20 Lead20, Stroke 900mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 900mm | Screw Length L3: 1120mm | L2: 1035mm | L1: 1010mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G0+1220LC5K | THK BNK2020K-3.6, φ20 Lead20, Stroke 1000mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 1000mm | Screw Length L3: 1220mm | L2: 1135mm | L1: 1110mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G2+1220LC7K | THK BNK2020K-3.6, φ20 Lead20, Stroke 1000mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 1000mm | Screw Length L3: 1220mm | L2: 1135mm | L1: 1110mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G0+1320LC5K | THK BNK2020K-3.6, φ20 Lead20, Stroke 1100mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 1100mm | Screw Length L3: 1320mm | L2: 1235mm | L1: 1210mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap | ||
| BNK2020K-3.6G2+1320LC7K | THK BNK2020K-3.6, φ20 Lead20, Stroke 1100mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ20mm | Lead: 20mm | Stroke: 1100mm | Screw Length L3: 1320mm | L2: 1235mm | L1: 1210mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 1.8 turns × 2 rows | Return Type: End Cap |
