Sharp STB-70
Image: sharp-industries.com, Sharp
Key Specifications
Spindle Power
swing over bed
swing over cross slide
distance between centers
spindle bore
control
How much does the Sharp STB-70 cost?
Price estimate
We do not have a price for the Sharp STB-70 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 STB-70 swings 71.65 in (1820 mm) over the bed, which makes it the largest STB big bore CNC lathe still sold in all six bed lengths. The step up from the STB-60 is close to a foot of diameter, and swing over the cross slide rises with it to 55.12 in (1400 mm).
Do not expect to face a full-diameter disc in one stroke. X-axis travel is 27.56 in (700 mm), well under half of 71.65 in, so the tool reaches part of the radius from one turret position. This is a machine for pipe ends, large couplings and rolls, where the cut is on the outside diameter, in the bore or on a narrow face.
Building height needs checking: the STB-70 stands 95.2 in (2,420 mm) high, and a part near full swing has to be lowered into the chuck from above. Weight starts at 37,900 lb (17,220 kg) on the shortest bed and reaches 49,800 lb (22,620 kg) on the longest. The bed is the same 31.89 in (810 mm) casting used through the line, with 2 V, 2 Flat Ways.
Short beds are worth a look at this swing. The STB-7060 has 59.06 in (1,500 mm) between centers and 45.28 in (1150 mm) of Z travel, enough for chucking work without paying for bed that is never used.
Full Specifications
| Parameter | Value |
|---|---|
| Swing Over Bed | 71.65 in (1820 mm) |
| Swing Over Cross Slide | 55.12 in (1400 mm) |
| Distance Between Centers | STB-7060: 59.06 in (1,500 mm); STB-7080: 78.74 in (2,000 mm); STB-70120: 118.1 in (3000 mm); STB-70160: 157.48 in (4,000 mm); STB-70200: 196.85 in (5,000 mm); STB-70240: 236.22 in (6,000 mm) |
| Spindle Bore | 6 in (152 mm) 9 in (230 mm) 10 in (255 mm) 12 in (305 mm) 15 in (380 mm) |
| CNC Control | FANUC Oi-TF |
| Bed Way Type | 2 V, 2 Flat Ways |
| Bed Width | 31.89 in (810 mm) |
| Bed Length | STB-7060: 155.91 in (3960 mm); STB-7080: 175.59 in (4460 mm); STB-70120: 214.96 in (5460 mm); STB-70160: 254.33 in (6460 mm); STB-70200: 293.70 in (7460 mm); STB-70240: 333.07 in (8460 mm) |
| X Axis Travel | 27.56 in (700 mm) |
| Z Axis Travel | STB-7060: 45.28 in (1150 mm); STB-7080: 64.96 in (1650 mm); STB-70120: 104.33 in (2650 mm); STB-70160: 143.70 in (3650 mm); STB-70200: 183.07 in (4650 mm); STB-70240: 222.44 in (5650 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 | STB-7060: 5.3 hp (Fanuc AC servo); STB-7080: 5.3 hp (Fanuc AC servo); STB-70120: 5.3 hp (Fanuc AC servo); STB-70160: 9.3 hp (Fanuc AC servo); STB-70200: 9.3 hp (Fanuc AC servo); STB-70240: 9.3 hp (Fanuc AC servo) |
| Hydraulic Pump Motor | 2 hp (1.5 kW) |
| Coolant Pump Motor | 1.7 hp (1.27 kW) |
| Machine Weight | STB-7060: 37,900 lb (17,220 kg); STB-7080: 39,300 lb (17,820 kg); STB-70120: 41,900 lb (19,020 kg); STB-70160: 44,500 lb (20,220 kg); STB-70200: 47,200 lb (21,420 kg); STB-70240: 49,800 lb (22,620 kg) |
| Machine Length | STB-7060: 229.0 in (5,816 mm); STB-7080: 248.7 in (6,316 mm); STB-70120: 288.0 in (7,316 mm); STB-70160: 327.4 in (8,316 mm); STB-70200: 366.8 in (9,316 mm); STB-70240: 406.1 in (10,316 mm) |
| Machine Width | 122.0 in (3,100 mm) |
| Machine Height | 95.2 in (2,420 mm) |
Specifications sourced from sharp-industries.com — verified 2026-10-04
Strengths & Limitations
Strengths
- 71.65 in (1820 mm) swing over the bed
- 55.12 in (1400 mm) over the cross slide
- Still listed in six lengths, 59.06 in (1,500 mm) to 236.22 in (6,000 mm) between centers
- Short STB-7060 bed suits chucking work at large diameter
- Double chucks available as options for long pipe
Limitations
- 27.56 in (700 mm) X travel covers well under half the swing
- 95.2 in (2,420 mm) high, plus crane clearance for loading
- 37,900 lb (17,220 kg) minimum weight
- Turrets and the hydraulic tailstock quill are optional accessories
Best For
Frequently Asked Questions
01
71.65 in (1820 mm) over the bed and 55.12 in (1400 mm) over the cross slide. The STB-60 below it is listed at 59.84 in (1520 mm) and 43.31 in (1100 mm), and the STB-95 above it at 95 in (2413 mm) and 78.7 in (2000 mm).
02
Not in one stroke. X-axis travel is 27.56 in (700 mm), and Sharp notes it varies by the turret installed. Facing a wide surface means working in bands, moving the tool between turret positions, or choosing a tool post that suits the face being cut.
03
Height is 95.2 in (2,420 mm) and width 122.0 in (3,100 mm) at every bed length. The STB-7060 weighs 37,900 lb (17,220 kg). The STB-7080 weighs 39,300 lb (17,820 kg). The STB-70120 weighs 41,900 lb (19,020 kg). The STB-70160 weighs 44,500 lb (20,220 kg). The STB-70200 weighs 47,200 lb (21,420 kg). The STB-70240 weighs 49,800 lb (22,620 kg).
04
6 in (152 mm), 9 in (230 mm), 10 in (255 mm), 12 in (305 mm) and 15 in (380 mm). The headstock casting supports the spindle at three points, with one ball bearing and two tapered roller bearings along the spindle shaft.
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