ROMI C 620
Key Specifications
Max Spindle
Spindle Power
centers height
distance between centers
swing over bed
swing over cross slide
How much does the ROMI C 620 cost?
Price estimate
We do not have a price for the ROMI C 620 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
A 104 mm (4.1 in) hole through the spindle is the first thing to know about the ROMI C 620. It is a mid-size flat-bed CNC lathe with a 620 mm (24 in) swing over the bed and a single A2-8” headstock, and that hole lets long tube and bar stock pass through the chuck on a machine of moderate size.
The spindle is belt driven without gears and runs from 1 to 1,800 rpm. Its 25 hp / 18.5 kW motor produces 868 Nm (640 lb-ft), so the C 620 is built around torque at moderate speed, not surface speed on small diameters. The next model up, the C 680, keeps the same 104 mm (4.1 in) hole on its A2-8” version but uses a geared headstock.
Two bed lengths are listed: 1.0 / 2.0 m (39 / 79 in) between centers, with 1,025 / 2,025 mm (40 / 80 in) of carriage travel. The short bed weighs about 5,000 kg (11,000 lbs) and the long one 5,550 kg (12,200 lbs). Cross slide travel is 360 mm (14.2 in), and 346 mm (13.6 in) swings over the cross slide. Rapids are 8 m/min (315 in/min).
Turret choice is wide at this size. An 8-station horizontal automatic turret takes Romi or VDI - 40 holders, a 4-station vertical automatic turret is the simpler alternative, and an 8-station VDI - 40 turret for driven tools adds ER - 32 collets turning at 3 to 3,400 rpm. All are options, as are the quick change holder and the rear tool holder. The carriage keeps electronic handwheels for manual-style work, and the control is a Siemens Sinumerik 828D.
Full Specifications
| Parameter | Value |
|---|---|
| Centers Height | 310 mm (12.2 in) |
| Distance Between Centers | 1.0 / 2.0 m (39 / 79 in) |
| Swing Over Bed | 620 mm (24 in) |
| Swing Over Cross Slide | 346 mm (13.6 in) |
| Swing Over Saddle Wings | 540 mm (21 in) |
| X Axis Travel | 360 mm (14.2 in) |
| Z Axis Travel | 1,025 / 2,025 mm (40 / 80 in) |
| Bed Width | 380 mm (15 in) |
| Bed Height | 400 mm (15.7 in) |
| Spindle Nose | ASA A2-8” |
| Spindle Bore | 104 mm (4.1 in) |
| Transmission System | Direct drive |
| Max Spindle Speed | 1 to 1,800 rpm |
| Spindle Torque | 868 Nm (640 lb-ft) (S6 - 40% rating) |
| Rapid Traverse Z | 8 m/min (315 in/min) |
| Rapid Traverse X | 8 m/min (315 in/min) |
| Tailstock Body Positioning | Manual (std) / Drag through the table (opt) |
| Tailstock Quill Drive | Manual (std) / Hydraulic (opt) |
| Tailstock Quill Stroke | 180 mm (7.1 in) |
| Tailstock Quill Diameter | 100 mm (3.9 in) |
| Tailstock Quill Taper | CM 5 |
| Spindle Motor Power | 25 hp / 18.5 kW (S6 - 40% rating) |
| Power Requirement | 25 kVA |
| Floor Space | 3.85 x 2.08 m (152 x 82 in) with 1.0 m between centers, without chip conveyor |
| Floor Space Long Bed | 4.85 x 2.08 m (191 x 82 in) with 2.0 m between centers, without chip conveyor |
| Machine Weight | 5,000 kg (11,000 lbs) approx. net with 1.0 m between centers |
| Machine Weight Long Bed | 5,550 kg (12,200 lbs) approx. net with 2.0 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
- Spindle hole of 104 mm (4.1 in) on an A2-8” nose for tube and bar work
- 868 Nm (640 lb-ft) of spindle torque from a 25 hp / 18.5 kW motor
- Two bed lengths, 1.0 / 2.0 m (39 / 79 in) between centers
- Optional 8-station driven-tool turret, VDI - 40, with a 3 to 3,400 rpm tool speed range
- Quill of 100 mm (3.9 in) diameter with a CM 5 taper and 180 mm (7.1 in) stroke
Limitations
- Top spindle speed is 1,800 rpm, low for small diameters and for aluminium
- One headstock only; there is no smaller, faster nose as on the C 510
- Rapid traverse drops to 8 m/min (315 in/min)
- Drag positioning of the tailstock and the hydraulic quill are options
Best For
Frequently Asked Questions
01
The spindle hole diameter is 104 mm (4.1 in) on an ASA A2-8” nose. The headstock is direct drive, with a speed range of 1 to 1,800 rpm, a 25 hp / 18.5 kW main motor (S6 - 40% rating) and 868 Nm (640 lb-ft) on the power graph.
02
Romi lists 1.0 / 2.0 m (39 / 79 in) between centers. Carriage travel is 1,025 / 2,025 mm (40 / 80 in). Floor space is 3.85 x 2.08 m (152 x 82 in) for the short bed and 4.85 x 2.08 m (191 x 82 in) for the long bed, both without chip conveyor.
03
As an option. The 8-station horizontal automatic turret for driven tools uses VDI - 40 holders, with axial driven holders for ER - 32 collets (Ø 3 to Ø 20 mm) and a driven tool speed range of 3 to 3,400 rpm.
04
A manual tailstock with a 100 mm (3.9 in) quill, 180 mm (7.1 in) of stroke and a CM 5 taper hole. Body positioning is manual as standard, with drag through the table as an option, and a hydraulic quill drive can replace the manual one.
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