GDW LZ 250SN-H Compact Precision Lathe
Description
Small Footprint, Big Precision
The GDW LZ 250SN-H is the most compact machine in GDW’s precision lathe range — and one of the brand’s most popular models. Built in Germany for toolrooms, mold and fixture shops, medical technology, R&D labs and training centers, it delivers toolroom-grade accuracy in a footprint that fits almost any shop.
A stepless AC main drive with speeds from 30 to 4,000 rpm keeps cutting speed constant regardless of load, while a 24- or 48-step feed gearbox covers a fine range of feeds and thread pitches — metric, inch, module and diametral pitch. The 17-inch color operator panel stores technology data for up to 99 tools, supports constant speed or constant surface speed, and offers electronic thread stops and plain-text diagnostics.
The spindle runs in three preloaded angular-contact bearings for smooth, vibration-free operation, and the induction-hardened cast-iron bed and hardened, ground slide screws keep the machine precise for decades. Safety and convenience come standard: a monitored chuck guard, sliding splash guard with safety glass, automatic handwheel disengagement, removable chip tray and a lockable tool cabinet built into the base.
Technical Specifications
| Parameter | Value |
|---|---|
| Working Range | |
| Center height | 6.5 in (165 mm) |
| Swing over bed | 13.0 in (330 mm) |
| Swing over cross slide | 7.5 in (190 mm) |
| Swing over slide ways | 11.8 in (300 mm) |
| Distance between centers | 19.7 in (500 mm) |
| Bed width | 8.7 in (220 mm) |
| Center height above floor | 45.9 in (1,165 mm) |
| Headstock | |
| Spindle nose | DIN 55027, size 5 |
| Spindle bore | 1.69 in (43 mm) |
| Collet capacity (draw / push type) | 1.02 / 1.65 in (26 / 42 mm) |
| Spindle taper | Metric 50 |
| Chuck diameter (standard / max.) | 5.5 / 6.3 in (140 / 160 mm) |
| Faceplate diameter, max. | 9.8 in (250 mm) |
| Spindle bearings | 3 preloaded angular-contact bearings |
| Carriage & Slides | |
| Cross slide travel | 6.5 in (165 mm) |
| Top slide travel | 4.5 in (115 mm) |
| Top slide swivel | +75° / −60° |
| Tool shank height | 0.47 / 0.63 in (12 / 16 mm) |
| Drive | |
| Main motor | 6.0 hp (4.5 kW), stepless AC drive |
| Spindle speed | 30–4,000 rpm, stepless |
| Feed gearbox | 24 or 48 steps |
| Feeds & Threads | |
| Longitudinal feeds | 0.001–0.035 in/rev (0.025–0.9 mm/rev) |
| Cross feeds | 0.00004–0.013 in/rev (0.0009–0.32 mm/rev) |
| Metric threads | 0.2–14 mm |
| Inch threads | 80–0.5 TPI |
| Module threads | 0.1–3.5 module |
| Diametral pitch | 200–6 DP |
| Tailstock | |
| Quill diameter | 1.77 in (45 mm) |
| Quill stroke | 3.3 in (85 mm) |
| Quill taper | MT 3 |
| Control | |
| Control type | Manual with DRO |
| Operator panel | 17″ color panel, memory for 99 tools |
| Dimensions & Weight | |
| Footprint (L × W × H, incl. display) | 57.1 × 40.7 × 70.9 in (1,450 × 1,035 × 1,800 mm) |
| Machine weight | approx. 2,540 lb (1,150 kg), depending on equipment |
Small Footprint, Big Precision
The GDW LZ 250SN-H is the most compact machine in GDW’s precision lathe range — and one of the brand’s most popular models. Built in Germany for toolrooms, mold and fixture shops, medical technology, R&D labs and training centers, it delivers toolroom-grade accuracy in a footprint that fits almost any shop.
A stepless AC main drive with speeds from 30 to 4,000 rpm keeps cutting speed constant regardless of load, while a 24- or 48-step feed gearbox covers a fine range of feeds and thread pitches — metric, inch, module and diametral pitch. The 17-inch color operator panel stores technology data for up to 99 tools, supports constant speed or constant surface speed, and offers electronic thread stops and plain-text diagnostics.
The spindle runs in three preloaded angular-contact bearings for smooth, vibration-free operation, and the induction-hardened cast-iron bed and hardened, ground slide screws keep the machine precise for decades. Safety and convenience come standard: a monitored chuck guard, sliding splash guard with safety glass, automatic handwheel disengagement, removable chip tray and a lockable tool cabinet built into the base.
Technical Specifications
| Parameter | Value |
|---|---|
| Working Range | |
| Center height | 6.5 in (165 mm) |
| Swing over bed | 13.0 in (330 mm) |
| Swing over cross slide | 7.5 in (190 mm) |
| Swing over slide ways | 11.8 in (300 mm) |
| Distance between centers | 19.7 in (500 mm) |
| Bed width | 8.7 in (220 mm) |
| Center height above floor | 45.9 in (1,165 mm) |
| Headstock | |
| Spindle nose | DIN 55027, size 5 |
| Spindle bore | 1.69 in (43 mm) |
| Collet capacity (draw / push type) | 1.02 / 1.65 in (26 / 42 mm) |
| Spindle taper | Metric 50 |
| Chuck diameter (standard / max.) | 5.5 / 6.3 in (140 / 160 mm) |
| Faceplate diameter, max. | 9.8 in (250 mm) |
| Spindle bearings | 3 preloaded angular-contact bearings |
| Carriage & Slides | |
| Cross slide travel | 6.5 in (165 mm) |
| Top slide travel | 4.5 in (115 mm) |
| Top slide swivel | +75° / −60° |
| Tool shank height | 0.47 / 0.63 in (12 / 16 mm) |
| Drive | |
| Main motor | 6.0 hp (4.5 kW), stepless AC drive |
| Spindle speed | 30–4,000 rpm, stepless |
| Feed gearbox | 24 or 48 steps |
| Feeds & Threads | |
| Longitudinal feeds | 0.001–0.035 in/rev (0.025–0.9 mm/rev) |
| Cross feeds | 0.00004–0.013 in/rev (0.0009–0.32 mm/rev) |
| Metric threads | 0.2–14 mm |
| Inch threads | 80–0.5 TPI |
| Module threads | 0.1–3.5 module |
| Diametral pitch | 200–6 DP |
| Tailstock | |
| Quill diameter | 1.77 in (45 mm) |
| Quill stroke | 3.3 in (85 mm) |
| Quill taper | MT 3 |
| Control | |
| Control type | Manual with DRO |
| Operator panel | 17″ color panel, memory for 99 tools |
| Dimensions & Weight | |
| Footprint (L × W × H, incl. display) | 57.1 × 40.7 × 70.9 in (1,450 × 1,035 × 1,800 mm) |
| Machine weight | approx. 2,540 lb (1,150 kg), depending on equipment |
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