No change gears
No change gears are fitted for threading; speed and feed are adjusted steplessly during machining via potentiometer (override), eliminating sources of error.
Conventional and servo lathes
WEILER C35HD / C50HD
Servo-conventional precision lathes with servo axes and C4 touch control
Ø 360 / 570 mm Swing over bed
800–2,000 mm Distance between centres
9 / 15 kW Drive power (60 % duty)
1–4,500 1/min Speed range (C35HD)
15" C4 touch screen
ⓘ Manufacturer data (WEILER overall programme brochure 2025 and product pages; torque and dimensions: C series brochure 09/2022). Values may change and vary; not binding on Boztaş.
Why C35HD / C50HD?
C4 control
Based on Siemens Sinumerik ONE with a 15" touch screen; longitudinal/facing roughing, radius and taper, thread and grooving cycles are selected directly; DIN/ISO programming, USB and network connection.
Accuracy
DIN 8605 toolmaker accuracy; positioning in the micron range also via electronic handwheels, easy recutting of existing threads (repair), tool nose radius compensation.
Variants
C35HD
WEILER's smallest servo-conventional lathe: 360 mm swing, 800 mm between centres, 9 / 7 kW, 1–4,500 rpm, Ø 57 mm spindle bore.
Suited to: Production, toolmaking, research institutes, repair and training
C50HD
570 mm swing, 1,000 / 2,000 mm between centres, 15 / 12 kW, 2-stage gearbox, 900 Nm, Ø 83 mm spindle bore, 0.1–1,000 mm metric threads.
Suited to: Larger diameters and lengths; Ø 83 mm spindle bore
Technical data
| Feature | C35HD | C50HD |
|---|---|---|
| Capacity | ||
| Distance between centres (mm) | 800 | 1,000 / 2,000 |
| Centre height (mm) | 180 | 280 |
| Swing over bed (mm) | 360 | 570 |
| Swing over cross slide (mm) | 180 | 340 |
| Cross slide travel (mm) | 200 | 340 |
| Bed width (mm) | 260 | 350 |
| Tool shank H × W (mm) | 25 × 25 | 32 × 25 |
| Spindle | ||
| Spindle nose, DIN 55027 / ISO 702-3 (size) | 6 | 8 |
| Spindle diameter at front bearing (mm) | 90 | 120 |
| Spindle bore (mm) | 57 | 83 |
| Spindle internal taper | MT 6 | metric 90 |
| Motor and drive | ||
| Drive power 60 / 100 % duty (kW) | 9 / 7 | 15 / 12 |
| Speed range (rpm) | 1–4,500 | 1–2,500 |
| Gear stages | 1 | 2 |
| Max. spindle torque (Nm) | 90 | 900 |
| Axes and feed | ||
| Feed force longitudinal / cross (N) | 7,000 / 3,000 | 12,000 / 8,000 |
| Feed range longitudinal and cross (mm/rev) | 0.001–10 | 0.001–50 |
| Rapid traverse longitudinal / cross (m/min) | 8 / 4 | 7 / 4 |
| Thread cutting | ||
| Metric threads (mm) | 0.1–400 | 0.1–1,000 |
| Inch threads (tpi) | 56–1/4 | 56–1/32 |
| Module threads (mm) / DP threads | 0.125–28 / 224–1 | 0.05–56 / 508–0.45 |
| Max. number of thread starts | 99 | 180 |
| Tailstock | ||
| Quill diameter / stroke (mm) | 50 / 110 | 80 / 200 |
| Quill taper | MT 3 | MT 5 |
| Control | ||
| Control | WEILER C4 (Siemens Sinumerik ONE), 15" touch screen | WEILER C4 (Siemens Sinumerik ONE), 15" touch screen |
| Accuracy | ||
| Acceptance accuracy | DIN 8605 | DIN 8605 |
| Dimensions and weight | ||
| Dimensions L × W × H (mm) | 2,200 × 1,780 × 1,750 | 2,850 / 3,850 × 2,350 × 1,900 |
| Weight (kg) | 2,200 | 3,500 / 4,000 |
Manufacturer data (WEILER overall programme brochure 2025 and product pages; torque and dimensions: C series brochure 09/2022). For C50HD the 09/2022 brochure states 0.001–10 mm/rev feed, 8/4 m/min rapid and 0.1–400 mm metric threads; the table shows the current values.
Technical data is taken from information published by the manufacturer. The manufacturer may change it without notice, and values may vary with the model and the machine configuration. The data is for information only and is not binding on Boztaş; binding values are stated only in a written quotation.
Processes that can be combined on this machine
- Longitudinal and facing roughing (cycle)
- Radius and taper turning
- Thread cutting (metric, inch, module, DP)
- Grooving
- Drilling and tapping
- Recutting existing threads (repair)
Frequently asked questions
How does a servo-conventional lathe differ from a conventional lathe?
Operation remains as on a conventional lathe while the axes are driven by servo motors. The speed is not set on a gearbox and no change gears are fitted for threads; data are entered on the C4 control in plain text with graphic support, with constant cutting speed and oriented spindle stop available.
What are the key differences between C35HD and C50HD?
C35HD: 360 mm swing, 800 mm between centres, 9 / 7 kW, 1–4,500 rpm, 57 mm spindle bore, 2,200 kg. C50HD: 570 mm swing, 1,000 / 2,000 mm between centres, 15 / 12 kW, 1–2,500 rpm, 83 mm spindle bore, 3,500 / 4,000 kg.
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