ROMI C 680
Image: romi.com, Romi
Key Specifications
Max Spindle
Spindle Power
centers height
distance between centers
swing over bed
swing over cross slide
How much does the ROMI C 680 cost?
Price estimate
We do not have a price for the ROMI C 680 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
Gears arrive in the C Series with the ROMI C 680. Below it the lathes are belt driven; this one has a two-range geared headstock behind a 45 hp / 33.6 kW motor, and it is the smallest model in the range sold in beds of 2.0 / 3.0 m (79 / 118 in) between centers.
The gearbox changes what the machine can cut. With the A2-8” headstock, range I runs from 1 to 452 rpm and delivers 2,520 Nm (1,859 lb-ft). Range II reaches 1,800 rpm with 630 Nm (465 lb-ft). Heavy roughing of a forged shaft happens in the low range; finishing passes and smaller diameters use the high one. The gears and shafts are hardened and ground, and oil is recirculated through the headstock.
There is a second headstock for hollow work. The A2-11” version opens the spindle hole from 104 mm (4.1 in) to 172 mm (6.77 in), and its low range covers 1 to 250 rpm. Pipe and casing sections that will not enter the smaller spindle are the reason to order it.
Swing over the bed is 680 mm (27 in) and over the cross slide 430 mm (16.9 in), so a shaft of real diameter still clears the carriage. X travel is 360 mm (14.2 in), and Z travel 2,025 / 3,025 mm (80 / 119 in). The tailstock is dragged into place through the table instead of being pushed by hand, and it carries a 130 mm (5.1 in) quill.
Turret options match the C 620: 8 stations horizontal, 4 stations vertical, or an 8-station VDI - 40 turret for driven tools. The 3.0 m machine weighs about 7,000 kg (15,400 lbs) and needs 7.70 x 2.43 m (303 x 96 in) of floor. Control is by Siemens Sinumerik 828D, with electronic handwheels on the panel.
Full Specifications
| Parameter | Value |
|---|---|
| Centers Height | 352 mm (13.9 in) |
| Distance Between Centers | 2.0 / 3.0 m (79 / 118 in) |
| Swing Over Bed | 680 mm (27 in) |
| Swing Over Cross Slide | 430 mm (16.9 in) |
| Swing Over Saddle Wings | 620 mm (24 in) |
| X Axis Travel | 360 mm (14.2 in) |
| Z Axis Travel | 2,025 / 3,025 mm (80 / 119 in) |
| Bed Width | 380 mm (15 in) |
| Bed Height | 400 mm (15.7 in) |
| Spindle Nose | ASA A2-8” or A2-11” |
| Spindle Bore | 104 mm (4.1 in) with A2-8”; 172 mm (6.77 in) with A2-11” |
| Transmission System | Geared, two speed ranges |
| Max Spindle Speed | 1 to 1,800 rpm with A2-8” |
| Spindle Speed Range 1 | 1 to 452 rpm with A2-8”; 1 to 250 rpm with A2-11” |
| Spindle Torque | 2,520 Nm (1,859 lb-ft) in range I; 630 Nm (465 lb-ft) in range II, A2-8” headstock (S6 - 40% rating) |
| Rapid Traverse Z | 8 m/min (315 in/min) |
| Rapid Traverse X | 8 m/min (315 in/min) |
| Tailstock Body Positioning | Drag through the table |
| Tailstock Quill Drive | Manual (std) / Hydraulic (opt) |
| Tailstock Quill Stroke | 180 mm (7.1 in) |
| Tailstock Quill Diameter | 130 mm (5.1 in) |
| Tailstock Quill Taper | CM 5 |
| Spindle Motor Power | 45 hp / 33.6 kW (S6 - 40% rating) |
| Power Requirement | 40 kVA |
| Floor Space | 6.65 x 2.43 m (262 x 96 in) with 2.0 m between centers, without chip conveyor |
| Floor Space Long Bed | 7.70 x 2.43 m (303 x 96 in) with 3.0 m between centers, without chip conveyor |
| Machine Weight | 6,300 kg (13,900 lbs) approx. net with 2.0 m between centers |
| Machine Weight Long Bed | 7,000 kg (15,400 lbs) approx. net with 3.0 m between centers |
| Quick Change Tool Holder | Optional, 3 holders, 32 x 32 mm (1.26 x 1.26 in) square, Ø 32 mm (1.26 in) round |
| Rear Tool Holder | Optional, 25 x 25 mm (0.98 x 0.98 in) square, Ø 40 mm (1.57 in) round |
| Turret Stations | 8 (optional horizontal automatic turret, Romi or VDI - 40) or 4 (optional vertical automatic turret) |
| Turret Tool Section | 25 x 25 mm (0.98 x 0.98 in) |
| Turret Boring Bar Diameter | Ø 40 mm (1.57 in) |
| Driven Tool Turret | Optional, 8 stations, VDI - 40 |
| Driven Tool Collet | ER - 32 (Ø 3 to Ø 20 mm) DIN 6499 |
| Driven Tool Speed | 3 to 3,400 rpm (optional driven-tool turret) |
| CNC Control | Siemens Sinumerik 828D |
Specifications sourced from romi.com — verified 2026-10-04
Strengths & Limitations
Strengths
- Geared headstock with 2,520 Nm (1,859 lb-ft) in range I on the A2-8” version
- Optional A2-11” headstock with a 172 mm (6.77 in) spindle hole
- 45 hp / 33.6 kW main motor, the same power as the two largest C Series lathes
- Tailstock positioned by drag through the table as listed, with a 130 mm (5.1 in) quill
- Beds of 2.0 / 3.0 m (79 / 118 in) between centers
Limitations
- Cross slide travel stays at 360 mm (14.2 in), the same as the C 620
- Range II on the A2-8” headstock gives 630 Nm (465 lb-ft), a quarter of the low-range torque
- Rapids of 8 m/min (315 in/min) over up to 3,025 mm of Z travel make for long repositioning moves
- The 3.0 m version needs 7.70 x 2.43 m (303 x 96 in) of floor without a chip conveyor
Best For
Frequently Asked Questions
01
It has two speed ranges with continuous variation inside each. On the A2-8” headstock, range I covers 1 to 452 rpm with 2,520 Nm (1,859 lb-ft) and range II reaches 1,800 rpm with 630 Nm (465 lb-ft), on the S6 - 40% rating. The main motor is 45 hp / 33.6 kW.
02
The spindle hole and the speed. The A2-8” headstock has a 104 mm (4.1 in) hole and a 1 to 452 rpm low range. The A2-11” headstock has a 172 mm (6.77 in) hole and a 1 to 250 rpm low range.
03
Swing over the bed is 680 mm (27 in), over the saddle wings 620 mm (24 in) and over the cross slide 430 mm (16.9 in). Distance between centers is 2.0 / 3.0 m (79 / 118 in), with 2,025 / 3,025 mm (80 / 119 in) of carriage travel.
04
Approximate net weight is 6,300 kg (13,900 lbs) with 2.0 m between centers and 7,000 kg (15,400 lbs) with 3.0 m between centers. Floor space is 6.65 x 2.43 m (262 x 96 in) and 7.70 x 2.43 m (303 x 96 in), without chip conveyor.
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