Studer S131
Key Specifications
X Travel
Z Travel
Max Spindle
Spindle Power
max travel speed x
max travel speed z
How much does the Studer S131 cost?
Estimated price range
Our best estimate for a cnc grinding machine in this class — not a quote from United Grinding (Studer). Configuration moves it a long way.
Overview
The Studer S131 is a CNC cylindrical grinding machine on a 125 mm (4.9 inch) center height, for workpieces up to 250 mm (9.8 inch) in diameter, 300 mm (11.8 inch) long and 100 kg (220 lbs). Its spindle speed range reaches 120,000 rpm and its B axis has a swiveling range of 330°.
The swivel is the row that stands out. 330° is close to a full turn, enough to arrange more than one grinding spindle around the axis and still bring each of them to the work, and enough to approach a bore, a face and a taper at their own angles while the part stays clamped. For components with several ground features that must run true to each other, that is worth more than raw travel.
Speed and power follow the pattern of a bore-grinding machine. 120,000 rpm is a speed for wheels of a few millimetres. The 15 kW (20 hp) maximum and the wheel limit of 250 mm (10 inch) in diameter by 25 mm (1 inch) in width describe the largest spindle the machine accepts, not the fastest. Studer's table gives one line for each figure, so the pairing of speed and power per spindle has to come from the quotation.
Travel is 350 mm (13.8 inch) in X and 400 mm (15.7 inch) in Z, each at up to 20,000 mm/min (787 inch/min). The S121 has the same X travel with 350 mm (13.8 inch) of Z and 18 kW (24 hp). The S141 offers 425 mm (16.7 inch) of X and 18 kW (24 hp) for larger work.
Full Specifications
| Parameter | Value |
|---|---|
| X-Axis Travel | 350 mm (13.8 inch) |
| Max Travel Speed X | 20,000 mm/min (787 inch/min) |
| Z-Axis Travel | 400 mm (15.7 inch) |
| Max Travel Speed Z | 20,000 mm/min (787 inch/min) |
| Spindle Motor Power | 15 kW (20 hp) |
| Max Spindle Speed | 120,000 rpm |
| Max Grinding Wheel Diameter | 250 mm (10 inch) |
| Max Grinding Wheel Width | 25 mm (1 inch) |
| Swiveling Range B | 330 ° |
| Workpiece Length | 300 mm (11.8 inch) |
| Workpiece Diameter | 250 mm (9.8 inch) |
| Max Workpiece Weight | 100 kg (220 lbs) |
| Center Height | 125 mm (4.9 inch) |
Specifications sourced from studer.com — verified 2026-10-03
Strengths & Limitations
Strengths
- 330° B-axis swiveling range for reaching bores, faces and tapers at different angles in one clamping
- Spindle speeds up to 120,000 rpm for small internal wheels
- 400 mm (15.7 inch) of Z travel, against 350 mm (13.8 inch) on the S121
- X and Z each traverse at up to 20,000 mm/min (787 inch/min)
- Accepts wheels up to 250 mm (10 inch) in diameter and 25 mm (1 inch) wide, with up to 15 kW (20 hp) of spindle power
Limitations
- The 125 mm (4.9 inch) center height limits workpiece diameter to 250 mm (9.8 inch)
- Maximum spindle power is 15 kW (20 hp), below the 18 kW (24 hp) of the S121 and S141
- Workpiece length is limited to 300 mm (11.8 inch) and weight to 100 kg (220 lbs)
- Wheel width is limited to 25 mm (1 inch)
Best For
Frequently Asked Questions
01
A swiveling range of 330° is nearly a full turn. It gives room to mount several grinding spindles around the axis and turn each to the workpiece, and to set the wheel at the angle a taper or face needs, all without re-clamping the part.
02
Up to 250 mm (9.8 inch) in diameter, 300 mm (11.8 inch) long and 100 kg (220 lbs). The center height is 125 mm (4.9 inch), which is what sets the diameter limit.
03
The S121 has 350 mm (13.8 inch) of travel in both X and Z and 18 kW (24 hp). The S131 has the same 350 mm (13.8 inch) of X, 400 mm (15.7 inch) of Z and 15 kW (20 hp), with a 330° B-axis swiveling range. Both reach 120,000 rpm.
04
A maximum spindle power of 15 kW (20 hp) and a maximum spindle speed of 120,000 rpm. These are the upper limits across the spindles the machine can carry. The largest wheel is 250 mm (10 inch) in diameter and 25 mm (1 inch) wide.
Videos
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