ROMI C 670
Key Specifications
Max Spindle
Spindle Power
centers height
distance between centers
swing over bed
swing over cross slide
How much does the ROMI C 670 cost?
Price estimate
We do not have a price for the ROMI C 670 that we can stand behind, so we show no number. Configuration, options and installation move the final price a long way: a quote is the reliable figure.
Overview
The ROMI C 670 tops the New Generation C Series: a flat-bed CNC lathe with 670 mm (26.38 in) of swing over the bed, 2,000 mm (78.74 in) between centers and a single A2-8” headstock bored to 104 mm (4.09 in). Where the two smaller models make the buyer choose between speed and bore, this one is built around the big bore and low-speed pull.
Romi rates the motor at 24.7 hp / 18.2 kW and the power graph shows 897 Nm (662 lb-ft), about twice the 447 Nm (330 lb-ft) of the strongest C 570 headstock. The table gives a speed range of 1 to 1,800 rpm; the standard-equipment list also mentions a 2 to 2,500 rpm range for this spindle, so confirm which one is quoted. Rapids are 8 m/min on both axes, slower than the 10 m/min of the C 470 and C 570, which fits a machine that spends its time in long, heavy cuts.
The work envelope is 345 mm (13.54 in) over the cross slide, 600 mm (23.6 in) over the saddle wings, 360 mm (14.17 in) of X travel and 2,025 mm (79.72 in) of Z travel. The tailstock is in proportion: a 100 mm (3.94 in) quill with 180 mm (7.08 in) of stroke and a CM 5 taper. Steady rests are listed up to Ø345.
Tooling is where this model has the widest choice in the series. Options include a vertical 4-position electric turret, an 8-station horizontal turret with Romi or VDI-40 fixing, and an 8-station driven-tool turret on a VDI - 40 disc running from 3 to 3,400 rpm. None is standard. Allow for 25 kVA of installed power and 4.84 m (190.5 in) x 1.57 m (61.81 in) of floor.
Full Specifications
| Parameter | Value |
|---|---|
| Centers Height | 340 mm (13.38 in) |
| Distance Between Centers | 2,000 mm (78.74 in) |
| Swing Over Bed | 670 mm (26.38 in) |
| Swing Over Cross Slide | 345 mm (13.54 in) |
| Swing Over Saddle Wings | 600 mm (23.6 in) |
| X Axis Travel | 360 mm (14.17 in) |
| Z Axis Travel | 2,025 mm (79.72 in) |
| Bed Width | 380 mm (14.96 in) |
| Bed Height | 290 mm (11.42 in) |
| Spindle Nose | ASA A2-8” |
| Spindle Bore | 104 mm (4.09 in) |
| Transmission System | Direct drive |
| Max Spindle Speed | 1 to 1,800 rpm |
| Spindle Torque | 897 Nm (662 lb-ft) (S6-40%) |
| Rapid Traverse Z | 8 m/min |
| Rapid Traverse X | 8 m/min |
| Tailstock Quill Drive | Manual (std) / Hydraulic (opt) |
| Tailstock Quill Stroke | 180 mm (7.08 in) |
| Tailstock Quill Diameter | 100 mm (3.94 in) |
| Tailstock Quill Taper | CM 5 |
| Spindle Motor Power | 24.7 hp / 18.2 kW (S6 - 40%) |
| Power Requirement | 25 kVA |
| Floor Space | 4.84 m (190.5 in) x 1.57 m (61.81 in) |
| Turret Stations | 8 (horizontal automatic turret, optional) |
| Turret Tooling | ROMI or VDI-40 |
| Turret Tool Section | 25 x 25 mm (0.98 x 0.98 in) |
| Turret Boring Bar Diameter | Ø 40 mm (Ø 1.57 in) |
| Driven Tool Turret | Optional, 8 stations, VDI - 40 disc |
| Driven Tool Speed | 3 to 3,400 rpm (optional driven-tool turret) |
| Vertical Turret Stations | 4 (square tool holder, optional) |
| CNC Control | Siemens Sinumerik 828D |
Specifications sourced from romi.com — verified 2026-10-04
Strengths & Limitations
Strengths
- 104 mm (4.09 in) spindle bore on an A2-8” nose for tube and large bar work
- 897 Nm (662 lb-ft) of spindle torque from the 24.7 hp / 18.2 kW motor
- 2,025 mm (79.72 in) of Z travel with 345 mm (13.54 in) of swing over the cross slide
- Tailstock with a 100 mm (3.94 in) quill, 180 mm (7.08 in) stroke and CM 5 taper
- Optional driven-tool turret, VDI - 40, with a 3 to 3,400 rpm tool speed range
Limitations
- The table lists 1 to 1,800 rpm, which is slow for small diameters and aluminium
- Rapid traverse is 8 m/min on X and Z, below the 10 m/min of the C 470 and C 570
- Every turret is an option, including the plain 8-station horizontal one
- Needs 4.84 m (190.5 in) of length and 25 kVA of installed power
Best For
Frequently Asked Questions
01
The spindle hole diameter is 104 mm (4.09 in) on an ASA A2-8” nose. It is the only headstock offered for this model. For comparison, the largest bore on the C 570 is 80 mm (3.15 in), with its A2-8” headstock.
02
The specification table gives 1 to 1,800 rpm and the power graph is drawn for the 1,800 rpm headstock, with 897 Nm (662 lb-ft). The standard-equipment list in the same catalogue mentions "1 to 1,800 rpm or 2 to 2,500 rpm" for this spindle, so ask Romi which range applies to the machine you are quoted.
03
With an option, yes. Romi lists an 8-station horizontal automatic turret for driven tools with a VDI - 40 disc and a tool speed range of 3 to 3,400 rpm. The catalogue shows no C axis or Y axis figures, so treat it as a turret for simple cross and end work and confirm the details.
04
It is a size up on the C 570 in every direction: 670 mm (26.38 in) of swing over the bed against 570 mm (22.44 in), 2,000 mm (78.74 in) between centers against 1,500 mm (59.05 in), and 24.7 hp / 18.2 kW against 15 hp / 11 kW. Both beds are 380 mm (14.96 in) wide. Rapids drop from 10 m/min to 8 m/min.
More from Romi
Other CNC Lathes / Turning Centers
Schaublin 51 CNC
Haas ST-10
Biglia B750YS
Johnford SL-60A-2S
Okuma 2SP-2500H
