![[THK] — BNK2040K-3 Ball Screw (Shaft φ20, Lead 40mm)](https://img.prosourcemro.com/2026/05/001-826-1024x847.png)
Ball Screws
THK
[THK] — BNK2040K-3 Ball Screw (Shaft φ20, Lead 40mm)
Family ID: THK-BNK2040K-3
THK BNK Series Precision Ground Ball Screw, shaft diameter φ20mm, lead 40mm. 1.5 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).
13 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| BNK2040K-3G0+820LC5K | THK BNK2040K-3, φ20 Lead40, Stroke 600mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ20mm | Lead: 40mm | Stroke: 600mm | Screw Length L3: 820mm | L2: 735mm | L1: 710mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 1.5 turns × 2 rows | Return Type: End Cap | ||
| BNK2040K-3G2+820LC7K | THK BNK2040K-3, φ20 Lead40, Stroke 600mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ20mm | Lead: 40mm | Stroke: 600mm | Screw Length L3: 820mm | L2: 735mm | L1: 710mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 1.5 turns × 2 rows | Return Type: End Cap | ||
| BNK2040K-3G0+920LC5K | THK BNK2040K-3, φ20 Lead40, Stroke 700mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ20mm | Lead: 40mm | Stroke: 700mm | Screw Length L3: 920mm | L2: 835mm | L1: 810mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 1.5 turns × 2 rows | Return Type: End Cap | ||
| BNK2040K-3G2+920LC7K | THK BNK2040K-3, φ20 Lead40, Stroke 700mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ20mm | Lead: 40mm | Stroke: 700mm | Screw Length L3: 920mm | L2: 835mm | L1: 810mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 1.5 turns × 2 rows | Return Type: End Cap | ||
| BNK2040K-3G0+1020LC5K | THK BNK2040K-3, φ20 Lead40, Stroke 800mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ20mm | Lead: 40mm | Stroke: 800mm | Screw Length L3: 1020mm | L2: 935mm | L1: 910mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 1.5 turns × 2 rows | Return Type: End Cap | ||
| BNK2040K-3G2+1020LC7K | THK BNK2040K-3, φ20 Lead40, Stroke 800mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ20mm | Lead: 40mm | Stroke: 800mm | Screw Length L3: 1020mm | L2: 935mm | L1: 910mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 1.5 turns × 2 rows | Return Type: End Cap | ||
| BNK2040K-3G0+1120LC5K | THK BNK2040K-3, φ20 Lead40, Stroke 900mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ20mm | Lead: 40mm | Stroke: 900mm | Screw Length L3: 1120mm | L2: 1035mm | L1: 1010mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 1.5 turns × 2 rows | Return Type: End Cap | ||
| BNK2040K-3G2+1120LC7K | THK BNK2040K-3, φ20 Lead40, Stroke 900mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ20mm | Lead: 40mm | Stroke: 900mm | Screw Length L3: 1120mm | L2: 1035mm | L1: 1010mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 1.5 turns × 2 rows | Return Type: End Cap | ||
| BNK2040K-3G0+1220LC5K | THK BNK2040K-3, φ20 Lead40, Stroke 1000mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ20mm | Lead: 40mm | Stroke: 1000mm | Screw Length L3: 1220mm | L2: 1135mm | L1: 1110mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 1.5 turns × 2 rows | Return Type: End Cap | ||
| BNK2040K-3G2+1220LC7K | THK BNK2040K-3, φ20 Lead40, Stroke 1000mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ20mm | Lead: 40mm | Stroke: 1000mm | Screw Length L3: 1220mm | L2: 1135mm | L1: 1110mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 1.5 turns × 2 rows | Return Type: End Cap | ||
| BNK2040K-3G0+1420LC5K | THK BNK2040K-3, φ20 Lead40, Stroke 1200mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ20mm | Lead: 40mm | Stroke: 1200mm | Screw Length L3: 1420mm | L2: 1335mm | L1: 1310mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 1.5 turns × 2 rows | Return Type: End Cap | ||
| BNK2040K-3G2+1420LC7K | THK BNK2040K-3, φ20 Lead40, Stroke 1200mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ20mm | Lead: 40mm | Stroke: 1200mm | Screw Length L3: 1420mm | L2: 1335mm | L1: 1310mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 1.5 turns × 2 rows | Return Type: End Cap | ||
| BNK2040K-3G2+1720LC7K | THK BNK2040K-3, φ20 Lead40, Stroke 1500mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ20mm | Lead: 40mm | Stroke: 1500mm | Screw Length L3: 1720mm | L2: 1635mm | L1: 1610mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 1.5 turns × 2 rows | Return Type: End Cap |
