Machine Comparison
Kuraki KBT-13A vs Kuraki KBT-15DX
Kuraki vs Kuraki · CNC Boring Machines
Summary
The Kuraki KBT-13A and Kuraki KBT-15DX are both from Kuraki's cnc boring machines lineup, making this a common upgrade or lineup decision for shops already invested in the Kuraki ecosystem. The Kuraki KBT-15DX leads in x travel (3,000 mm (118.1 in) vs 2,500 mm (98.4 in)). The Kuraki KBT-15DX leads in spindle power (37 kW (50 HP) vs 30 kW (40 HP)). The Kuraki KBT-15DX shows specification advantages in 9 categories, though the Kuraki KBT-13A may still be the better choice depending on your shop's specific needs and the type of work you run. Both machines are proven performers in production environments and represent solid investments for shops in the market for a cnc boring machine.
Specifications Comparison
| Specification | Kuraki KBT-13A | Kuraki KBT-15DX |
|---|---|---|
| X-Axis Travel | 2,500 mm (98.4 in) | 3,000 mm (118.1 in) ▲ |
| Y-Axis Travel | 2,000 mm (78.7 in) | 2,200 mm (86.6 in) ▲ |
| Z-Axis Travel | 1,500 mm (59.1 in) | 2,000 mm (78.7 in) ▲ |
| Spindle Power | 30 kW (40 HP) | 37 kW (50 HP) ▲ |
| Rapid Traverse | 8 m/min (315 IPM) | 8 m/min (315 IPM) |
| Control | Fanuc 31i-B | Fanuc 31i-B5 |
| Spindle Diameter | 130 mm (5.1 in) | 150 mm (5.9 in) ▲ |
| Spindle Speed | 5 - 2,000 RPM | 5 - 1,600 RPM |
| Spindle Quill Travel | 600 mm (23.6 in) | 700 mm (27.6 in) ▲ |
| Rotary Table Size | 1,600 x 1,800 mm (63 x 71 in) | 2,000 x 2,200 mm (78.7 x 86.6 in) ▲ |
| Max Table Load | 15,000 kg (33,069 lb) | 15,000 kg (33,069 lb) |
| Table Indexing Accuracy | 5 arc-seconds ▲ | 3 arc-seconds |
| Facing Head | Optional, up to 1,000 mm diameter | Optional, up to 1,200 mm diameter ▲ |
| Machine Weight | 32,000 kg (70,548 lb) | 42,000 kg (92,594 lb) ▲ |
| Price Range | $450,000 - $700,000 ▲ | $650,000 - $1,000,000 |
Advantages
Kuraki KBT-13A
- Superior table indexing accuracy at 5 arc-seconds vs 3 arc-seconds
- More competitive pricing at $450,000 - $700,000 compared to $650,000 - $1,000,000
- Backed by Kuraki's dealer and service network for parts and support
- Heavy equipment manufacturers machining large castings for mining, construction, and industrial machinery
Kuraki KBT-15DX
- Greater x travel of 3,000 mm (118.1 in) accommodates larger workpieces
- Greater y travel of 2,200 mm (86.6 in) accommodates larger workpieces
- Greater z travel of 2,000 mm (78.7 in) accommodates larger workpieces
- More spindle power at 37 kW (50 HP) for aggressive material removal in harder materials
- Superior spindle diameter at 150 mm (5.9 in) vs 130 mm (5.1 in)
Verdict
The Kuraki KBT-15DX edges ahead on specifications in this comparison, particularly in X Travel and Y Travel. However, the Kuraki KBT-13A remains competitive and may be the better choice depending on price, dealer support in your area, or specific workholding and tooling considerations. Both are capable machines — the best decision comes from running your actual parts and evaluating total cost of ownership including tooling, training, and service.