SYIL L4
Image: syil.com, SYIL
Key Specifications
Max Spindle
Spindle Power
Max Turn Length
chuck size
swing over bed
swing over carriage
How much does the SYIL L4 cost?
Price estimate
We do not have a price for the SYIL L4 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
Shafts are the job of the SYIL L4. It is the largest CNC lathe SYIL lists, with a 250 mm (9.8 in) chuck, an A2-8 spindle nose and a maximum workpiece diameter of ø520 mm (20.5 in), and it comes in three bed lengths. SYIL gives the maximum workpiece length as 800 mm (1,100 mm / 1,500 mm) and the Z travel as 850 mm (1,150 mm / 1,550 mm).
The spindle is sized for that work. Power is listed as 15/18.5 kW (20.1/24.8 hp) and top speed is 3,500 rpm, lower than the smaller L models and appropriate for larger diameters. A spindle bore of ø91 mm (3.6 in) with a ø75 mm (3.0 in) through-bore lets thick bar and tube pass through the headstock.
Long parts need support, and the L4 specification includes tailstock figures: an MT5 sleeve taper and a tailstock rapid traverse of 10 m/min (394 ipm). For slender shafts SYIL lists a centre-column steady rest as an option. X travel is printed as 260+10 mm, and both X and Z rapid at 30 m/min (1,181 ipm).
Tooling is a 12-station servo turret taking 25 × 25 mm shanks and ø40 mm (1.6 in) boring bars, with tool-to-tool indexing between 0.2 s and 0.5 s. A Power Turret in BMT65 size is on the options list, so milling and cross-drilling on this machine should be treated as an extra and confirmed in the quotation.
Weight goes with bed length: 6,200 kg / 6,800 kg / 7,220 kg. Swing over the bed is ø630 mm (24.8 in) and over the carriage ø330 mm (13.0 in). As on every SYIL machine the control is the Siemens SINUMERIK 828D, and the ball screws and linear guides are THK.
Full Specifications
| Parameter | Value |
|---|---|
| Chuck Size | 250 mm (9.8 in) |
| Swing Over Bed | ø630 mm (24.8 in) |
| Swing Over Carriage | ø330 mm (13.0 in) |
| Max Turning Diameter | ø520 mm (20.5 in) |
| Max Turning Length | 800 mm (1,100 mm / 1,500 mm); 31.5 in (43.3 in / 59.1 in) |
| Max Spindle Speed | 3,500 rpm |
| Spindle Nose | A2-8 |
| Spindle Bore | ø91 mm (3.6 in) |
| Through Spindle Bore Diameter | ø75 mm (3.0 in) |
| Spindle Motor Power | 15/18.5 kW (20.1/24.8 hp) |
| Turret Type | Servo Turret |
| Turret Stations | 12 |
| Turret Index Time | 0.2 s min. / 0.5 s max. (tool to tool) |
| Tool Shank Size | 25 × 25 mm |
| Tool Shank Diameter | ø40 mm (1.6 in) |
| X Axis Travel | 260+10 mm |
| Z Axis Travel | 850 mm (1,150 mm / 1,550 mm); 33.5 in (45.3 in / 61.0 in) |
| Rapid Traverse X | 30 m/min (1,181 ipm) |
| Rapid Traverse Z | 30 m/min (1,181 ipm) |
| Tailstock Rapid Traverse | 10 m/min (394 ipm) |
| Tailstock Sleeve Taper | MT5 |
| CNC Control | Siemens SINUMERIK 828D |
| Machine Weight | 6,200 kg / 6,800 kg / 7,220 kg (13,668 lb / 14,991 lb / 15,917 lb) |
Specifications sourced from syil.com — verified 2026-10-04
Strengths & Limitations
Strengths
- Three bed lengths, with maximum workpiece length listed as 800 mm (1,100 mm / 1,500 mm)
- ø75 mm (3.0 in) through-spindle bore on an A2-8 nose
- Spindle power of 15/18.5 kW (20.1/24.8 hp)
- ø520 mm (20.5 in) maximum workpiece diameter with ø630 mm (24.8 in) swing over the bed
- MT5 tailstock, with a centre-column steady rest available as an option
Limitations
- Top spindle speed is 3,500 rpm, below the 4,000 rpm of the SYIL L3
- The standard turret is a servo turret; the BMT65 Power Turret is an option
- Tailstock rapid traverse is 10 m/min (394 ipm), slower than the 30 m/min of the axes
- Weights of 6,200 kg / 6,800 kg / 7,220 kg call for foundation and rigging planning
- No Y axis or counter spindle appears in the L4 specification
Best For
Frequently Asked Questions
01
SYIL prints the maximum workpiece length as 800 mm (1,100 mm / 1,500 mm), which converts to 31.5 in (43.3 in / 59.1 in), and the Z travel as 850 mm (1,150 mm / 1,550 mm). The three figures correspond to three bed lengths, so name the length you need when requesting a quotation.
02
The spindle has an A2-8 nose and carries a 250 mm (9.8 in) chuck. Spindle bore is ø91 mm (3.6 in) and the through-bore is ø75 mm (3.0 in). Maximum speed is 3,500 rpm and spindle power is listed as 15/18.5 kW (20.1/24.8 hp).
03
The L4 is specified with a 12-station servo turret, and SYIL lists a Power Turret in BMT65 size among the options. The page's specification rows on live tooling do not agree with that option, so ask SYIL which turret and which driven-tool interface a quoted machine carries.
04
The L4 is the larger turning machine. The SYIL L3 has a 200 mm (7.9 in) chuck, a ø52 mm (2.0 in) through-bore and a ø380 mm (15.0 in) maximum workpiece diameter; the L4 has a 250 mm (9.8 in) chuck, a ø75 mm (3.0 in) through-bore and ø520 mm (20.5 in). The SYIL L3 in turn has a Power Turret as standard and is offered with a Y axis and a counter spindle.
05
SYIL lists three weights, 6,200 kg / 6,800 kg / 7,220 kg (13,668 lb / 14,991 lb / 15,917 lb), in the same order as the three bed lengths. Check the floor loading and crane capacity for the version you plan to install.
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