![[THK] — BNK1408-2.5 Ball Screw (Shaft φ14, Lead 8mm)](https://img.prosourcemro.com/2026/05/001-819-1024x847.png)
Ball Screws
THK
[THK] — BNK1408-2.5 Ball Screw (Shaft φ14, Lead 8mm)
Family ID: THK-BNK1408-2.5
THK BNK Series Precision Ground Ball Screw, shaft diameter φ14mm, lead 8mm. 2.5 turns × 1 row ball circuit, Return Pipe 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).
22 product codes available in this family
Product Codes & Specifications
| Product Code | Description | Brand | Spec | ||
|---|---|---|---|---|---|
| BNK1408-2.5RRG0+321LC5K | THK BNK1408-2.5, φ14 Lead8, Stroke 150mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 150mm | Screw Length L3: 321mm | L2: 254mm | L1: 239mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG2+321LC7K | THK BNK1408-2.5, φ14 Lead8, Stroke 150mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 150mm | Screw Length L3: 321mm | L2: 254mm | L1: 239mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG0+371LC5K | THK BNK1408-2.5, φ14 Lead8, Stroke 200mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 200mm | Screw Length L3: 371mm | L2: 304mm | L1: 289mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG2+371LC7K | THK BNK1408-2.5, φ14 Lead8, Stroke 200mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 200mm | Screw Length L3: 371mm | L2: 304mm | L1: 289mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG0+421LC5K | THK BNK1408-2.5, φ14 Lead8, Stroke 250mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 250mm | Screw Length L3: 421mm | L2: 354mm | L1: 339mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG2+421LC7K | THK BNK1408-2.5, φ14 Lead8, Stroke 250mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 250mm | Screw Length L3: 421mm | L2: 354mm | L1: 339mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG0+471LC5K | THK BNK1408-2.5, φ14 Lead8, Stroke 300mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 300mm | Screw Length L3: 471mm | L2: 404mm | L1: 389mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG2+471LC7K | THK BNK1408-2.5, φ14 Lead8, Stroke 300mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 300mm | Screw Length L3: 471mm | L2: 404mm | L1: 389mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG0+521LC5K | THK BNK1408-2.5, φ14 Lead8, Stroke 350mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 350mm | Screw Length L3: 521mm | L2: 454mm | L1: 439mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG2+521LC7K | THK BNK1408-2.5, φ14 Lead8, Stroke 350mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 350mm | Screw Length L3: 521mm | L2: 454mm | L1: 439mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG0+571LC5K | THK BNK1408-2.5, φ14 Lead8, Stroke 400mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 400mm | Screw Length L3: 571mm | L2: 504mm | L1: 489mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG2+571LC7K | THK BNK1408-2.5, φ14 Lead8, Stroke 400mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 400mm | Screw Length L3: 571mm | L2: 504mm | L1: 489mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG0+621LC5K | THK BNK1408-2.5, φ14 Lead8, Stroke 450mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 450mm | Screw Length L3: 621mm | L2: 554mm | L1: 539mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG2+621LC7K | THK BNK1408-2.5, φ14 Lead8, Stroke 450mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 450mm | Screw Length L3: 621mm | L2: 554mm | L1: 539mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG0+671LC5K | THK BNK1408-2.5, φ14 Lead8, Stroke 500mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 500mm | Screw Length L3: 671mm | L2: 604mm | L1: 589mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG2+671LC7K | THK BNK1408-2.5, φ14 Lead8, Stroke 500mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 500mm | Screw Length L3: 671mm | L2: 604mm | L1: 589mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG0+721LC5K | THK BNK1408-2.5, φ14 Lead8, Stroke 550mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 550mm | Screw Length L3: 721mm | L2: 654mm | L1: 639mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG2+721LC7K | THK BNK1408-2.5, φ14 Lead8, Stroke 550mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 550mm | Screw Length L3: 721mm | L2: 654mm | L1: 639mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG0+771LC5K | THK BNK1408-2.5, φ14 Lead8, Stroke 600mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 600mm | Screw Length L3: 771mm | L2: 704mm | L1: 689mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG2+771LC7K | THK BNK1408-2.5, φ14 Lead8, Stroke 600mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 600mm | Screw Length L3: 771mm | L2: 704mm | L1: 689mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG0+871LC5K | THK BNK1408-2.5, φ14 Lead8, Stroke 700mm, G0 (Zero), 5K (C5 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 700mm | Screw Length L3: 871mm | L2: 804mm | L1: 789mm | Clearance: G0 (Zero) | Nut Grade: 5K (C5 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe | ||
| BNK1408-2.5RRG2+871LC7K | THK BNK1408-2.5, φ14 Lead8, Stroke 700mm, G2 (Standard), 7K (C7 Grade) | THK | Shaft Diameter: φ14mm | Lead: 8mm | Stroke: 700mm | Screw Length L3: 871mm | L2: 804mm | L1: 789mm | Clearance: G2 (Standard) | Nut Grade: 7K (C7 Grade) | Ball Circuit: 2.5 turns × 1 row | Return Type: Return Pipe |
