Sharp STF-44
Key Specifications
Spindle Power
swing over bed
swing over cross slide
spindle bore
control
bed way type
How much does the Sharp STF-44 cost?
Price estimate
We do not have a price for the Sharp STF-44 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
The Sharp STF-44 is a facing lathe: a big bore CNC lathe with a short bed and, as Sharp's own bullet puts it, no tailstock. Swing over the bed is 44.09 in (1120 mm), Z-axis travel is 39.37 in (1000 mm), and the whole bed is 128.54 in (3265 mm) long.
Everything is held in the chuck. That suits flanges, rings, hubs, valve bodies and pipe ends, parts whose diameter is large and whose length is modest, and it is the wrong layout for a shaft that needs support at the far end. The headstock is the same three-point design used on Sharp's long-bed big bore machines, with one ball bearing and two tapered roller bearings on the spindle, and the 6" bore is standard with 9", 10", 12" and 15" optional.
Cross travel is generous for the swing. X-axis travel is 21.65 in (550 mm), close to half of 44.09 in, so a facing cut from the bore outwards covers most of the radius. Swing over the cross slide is 23.62 in (600 mm).
Leaving out the long bed saves weight and floor. The STF-44 weighs 20,500 lb (9,300 kg); the STB-44, which has the same swing and nearly the same bed width, starts at 30,800 lb (14,000 kg). Width is 98.82 in (2,510 mm) and height 83.27 in (2,115 mm).
Full Specifications
| Parameter | Value |
|---|---|
| Swing Over Bed | 44.09 in (1120 mm) |
| Swing Over Cross Slide | 23.62 in (600 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 | 21.65 in (550 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 | 20,500 lb (9,300 kg) |
| Machine Width | 98.82 in (2,510 mm) |
| Machine Height | 83.27 in (2,115 mm) |
Specifications sourced from sharp-industries.com — verified 2026-10-04
Strengths & Limitations
Strengths
- 21.65 in (550 mm) of X travel on a 44.09 in (1120 mm) swing
- Short 128.54 in (3265 mm) bed keeps the machine at 20,500 lb (9,300 kg)
- Spindle bore 6" standard, 9", 10", 12" and 15" optional
- 31.88 in (810 mm) bed with 2 V, 2 Flat Ways
- 30 hp spindle motor with M code 4 step auto change speeds
Limitations
- It has no tailstock, so long work cannot be supported between centers
- Z-axis travel is limited to 39.37 in (1000 mm)
- Swing over the cross slide is 23.62 in (600 mm)
- Turrets and chucks are optional accessories
Best For
Frequently Asked Questions
01
Chucking work of large diameter and short length. Sharp states that it has no tailstock, and the table gives 39.37 in (1000 mm) of Z-axis travel with 21.65 in (550 mm) of X-axis travel under a 44.09 in (1120 mm) swing.
02
Both swing 44.09 in (1120 mm). The STB-44 is a between-centers lathe sold in six bed lengths and weighing 30,800 lb (14,000 kg) or more, with 23.62 in (600 mm) of X travel. The STF-44 is a single short machine of 20,500 lb (9,300 kg) with 21.65 in (550 mm) of X travel and no tailstock.
03
Sharp lists the 6" bore as standard and 9", 10", 12" and 15" as optional; in the table these are 6 in, 9 in, 10 in, 12 in and 15 in, or 152 mm, 230 mm, 255 mm, 305 mm and 380 mm. Double chucks are available as options, with a rear chuck adapter on the accessory list.
04
The table gives a width of 98.82 in (2,510 mm) and a height of 83.27 in (2,115 mm), on a bed 128.54 in (3265 mm) long. Sharp's overall length row prints inch and metric figures that do not agree, so ask for the footprint drawing. Weight is 20,500 lb (9,300 kg).
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