Machine Comparison
Haas SB-28 vs Haas SB-35
Haas Automation vs Haas Automation · CNC Lathes
Summary
The Haas SB-28 and the Haas SB-35 are CNC lathes that share a spindle drive and a turret: 40 hp (29.8 kW), 425 ft-lbf @ 325 rpm, an A2-8 nose, 12 tool stations, 4,000 rpm live tools and a 13.5 in (345 mm) maximum turning diameter. The Haas SB-35 is the longer machine with the larger bar capacity; the Haas SB-28 is the faster one.
The Haas SB-35 takes 3.5 in (90 mm) bar against 2.9 in (74 mm), turns 30 in (760 mm) of length against 21.3 in (540 mm) and carries a 12 in (305 mm) chuck against 10 in (254 mm). The Haas SB-28 spins to 3,200 rpm against 2,500 rpm. Haas lists the Haas SB-28 at US$94,995 and the Haas SB-35 at US$112,995.
Specifications Comparison
| Specification | Haas SB-28 | Haas SB-35 |
|---|---|---|
| X-Axis Travel | 9 in (230 mm) | 9 in (230 mm) |
| Z-Axis Travel | 23.2 in (590 mm) | 32.3 in (820 mm) ▲ |
| Max Turning Diameter | 13.5 in (345 mm) | 13.5 in (345 mm) |
| Max Turning Length | 21.3 in (540 mm) | 30 in (760 mm) ▲ |
| Bar Capacity | 2.9 in (74 mm) | 3.5 in (90 mm) ▲ |
| Chuck Size | 10 in (254 mm) | 12 in (305 mm) |
| Max Spindle Speed | 3,200 rpm ▲ | 2,500 rpm |
| Spindle Power | 40 hp (29.8 kW) | 40 hp (29.8 kW) |
| Spindle Torque | 425 ft-lbf @ 325 rpm (576 N·m @ 325 rpm) | 425 ft-lbf @ 325 rpm (576 N·m @ 325 rpm) |
| Spindle Taper / Nose | A2-8 | A2-8 |
| Live Tool Speed | 4,000 rpm | 4,000 rpm |
| Tool Capacity | 12 | 12 |
| Rapid Traverse | 630 ipm (16 m/min) | 630 ipm (16 m/min) |
| Distance Between Centers | 29.7 in (753 mm) | 39.2 in (995 mm) ▲ |
| Machine Weight | 12,600 lb (5,715.4 kg) | 14,920 lb (6,767.7 kg) |
| Published List Price | US$94,995 | US$112,995 |
Advantages
Haas SB-28
- 3,200 rpm spindle against 2,500 rpm
- Lower published list price, US$94,995 against US$112,995
- Lighter machine, 12,600 lb (5,715.4 kg) against 14,920 lb (6,767.7 kg)
Haas SB-35
- 3.5 in (90 mm) bar capacity against 2.9 in (74 mm)
- 30 in (760 mm) max turning length against 21.3 in (540 mm)
- 12 in (305 mm) chuck against 10 in (254 mm)
- 39.2 in (995 mm) between centers and 32.3 in (820 mm) of Z travel against 29.7 in (753 mm) and 23.2 in (590 mm)
Verdict
With the same 40 hp (29.8 kW) spindle and 13.5 in (345 mm) turning diameter, the choice is about bar size and part length. Choose the Haas SB-35 for bar up to 3.5 in (90 mm) and shaft work up to 30 in (760 mm) long. Choose the Haas SB-28 for shorter chuck work and bar up to 2.9 in (74 mm), where its 3,200 rpm top speed helps on smaller diameters and its list price is lower at US$94,995.