Sharp STF-50
Key Specifications
Spindle Power
swing over bed
swing over cross slide
spindle bore
control
bed way type
How much does the Sharp STF-50 cost?
Price estimate
We do not have a price for the Sharp STF-50 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
From the STF-50 upward, Sharp's big bore facing lathes share one cross slide stroke: 25.59 in (650 mm) of X-axis travel. On this model that stroke works under a 51.97 in (1320 mm) swing over the bed and 31.50 in (800 mm) over the cross slide.
Put those numbers side by side. Half the swing is about the distance from the spindle centre to the rim of the largest part, and the X stroke is very nearly that long. A single tool can therefore work across almost the whole face of a full-size flange without being moved on its post, which is the point of a facing lathe.
Z travel is 39.37 in (1000 mm) and there is no tailstock. The part hangs from the chuck, so its length and weight are limited by what the chuck and spindle bearings will carry, not by the bed. Chucks are optional accessories in 3 jaw and 4 jaw types; choose them with the heaviest job in mind.
The STF-50 weighs 21,800 lb (9,900 kg) and is 102.76 in (2,610 mm) wide and 87.20 in (2,215 mm) high. Its control is the FANUC Oi-TF, and the spindle motor is 30 hp with 40 hp or 50 hp optional.
Full Specifications
| Parameter | Value |
|---|---|
| Swing Over Bed | 51.97 in (1320 mm) |
| Swing Over Cross Slide | 31.50 in (800 mm) |
| Spindle Bore | 6 in 9 in 10 in 12 in 15 in (152 mm 230 mm 255 mm 305 mm 380 mm) |
| CNC Control | FANUC Oi-TF |
| Bed Way Type | 2 V, 2 Flat Ways |
| Bed Width | 31.88 in (810 mm) |
| Bed Length | 128.54 in (3265 mm) |
| X Axis Travel | 25.59 in (650 mm) |
| Z Axis Travel | 39.37 in (1000 mm) |
| X Axis Ballscrew Diameter | 1.57 in (40 mm) |
| Z Axis Ballscrew Diameter | 2.48 in (63 mm) |
| Spindle Motor Power | 30 hp (STD Fanuc Alpha 22) Opt: 40 hp or 50 hp |
| X Axis Motor | 5.3 hp (Fanuc AC servo) |
| Z Axis Motor | 5.3 hp (Fanuc AC servo) |
| Hydraulic Pump Motor | 2 hp (1.5 kW) |
| Coolant Pump Motor | 1.7 hp (1.27 kW) |
| Machine Weight | 21,800 lb (9,900 kg) |
| Machine Width | 102.76 in (2,610 mm) |
| Machine Height | 87.20 in (2,215 mm) |
Specifications sourced from sharp-industries.com — verified 2026-10-04
Strengths & Limitations
Strengths
- 25.59 in (650 mm) X travel, nearly half the 51.97 in (1320 mm) swing
- 31.50 in (800 mm) swing over the cross slide
- Compact for its swing at 21,800 lb (9,900 kg)
- FANUC Oi-TF control with flat belt conveyor as standard
- Hydraulic 4-way, V-8 and V-12 turrets offered as options
Limitations
- No tailstock for supporting long or slender parts
- 39.37 in (1000 mm) of Z travel
- 3 jaw and 4 jaw chucks are optional accessories
- Standard motor is 30 hp on a 51.97 in swing
Best For
Frequently Asked Questions
01
X-axis travel is 25.59 in (650 mm) under a swing of 51.97 in (1320 mm), so the stroke is close to the radius of the largest part. Sharp notes that X travel varies by the turret installed, and all turrets are options, so confirm the stroke for the tool post you order.
02
The STF-44 swings 44.09 in (1120 mm) with 21.65 in (550 mm) of X travel and weighs 20,500 lb (9,300 kg). The STF-50 swings 51.97 in (1320 mm) with 25.59 in (650 mm) of X travel and weighs 21,800 lb (9,900 kg). Z travel is 39.37 in (1000 mm) on both.
03
No. Sharp's bullet list for the STF series says plainly that it has no tailstock. The machine is a chucking lathe with 39.37 in (1000 mm) of Z-axis travel, and a 16" steady rest appears on the standard accessory list for parts that need a support near the chuck.
04
Width 102.76 in (2,610 mm), height 87.20 in (2,215 mm), weight 21,800 lb (9,900 kg). The bed is 31.88 in (810 mm) wide and 128.54 in (3265 mm) long.
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