Seibu SFG-35P
Image: seibudenki.com, Seibu
Key Specifications
Max Spindle
Spindle Power
chuck size
max gripping work size
x axis travel
z axis travel
How much does the Seibu SFG-35P cost?
Price estimate
We do not have a price for the Seibu SFG-35P 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 Seibu SFG-35P is the 0.1 µm version of Seibu's 6 inch SFG machine, a grinding machine that combines cutting and grinding of inside and outside diameters in one chucking.
Mechanically it follows the SFG-35HP row for row: 350 mm (13.8 in) of X travel, 220 mm (8.7 in) of Z, a built-in spindle to 3,000 min-1 with a Φ32 mm (1.3 in) through hole, and the same AC spindle motor at 2.2/3.7 kW (continuous/30 minute rating). The weight is identical at 2,500 kg (5,511 lb) including the control board.
Four rows differ. The minimum setting unit is 0.1 µm, with X as diameter, against 0.01 µm on the SFG-35HP. The X and Z scale, 0.1 µm, is an option here, whereas the SFG-35HP lists a 0.01 µm scale with no such note. The tank is 270 L; the SFG-35HP table offers 270 or 370 L (option). And the overall size is 1,690 × 1,980 × 1,756 mm (66.5 × 78.0 × 69.1 in).
Who should pick it? Shops whose tolerances are comfortably met with a 0.1 µm setting unit, and that would add the scale only if the parts demand it. The capacity statement is unchanged: a Φ150×L150 maximum gripping work size with a maximum processing length of 100 mm (3.9 in), varying with workpiece shape, weight and cutting tool interference.
The C axis is position control only as standard, and synchronous control is an option. Rapid traverse is 4,000 mm/min (157.5 ipm) on X and Z, and the spindle centre stands 1,100 mm (43.3 in) from the floor.
Full Specifications
| Parameter | Value |
|---|---|
| Chuck Size | 6 inch |
| Max Gripping Work Size | Φ150×L150 (maximum processing length 100 mm (3.9 in)); varies depending on workpiece shape, weight, and cutting tool interference |
| X Axis Travel | 350 mm (13.8 in) |
| Z Axis Travel | 220 mm (8.7 in) |
| Rapid Traverse Xz | 4,000 mm/min (157.5 ipm) |
| Minimum Setting Unit | 0.1 µm (X axis is diameter) |
| Scale Xz | 0.1 µm (option) |
| Center Height Above Cross Saddle | 105 mm (4.1 in) |
| Max Spindle Speed | 3,000 min-1 |
| Spindle Bore | Φ32 mm (1.3 in) |
| Spindle Drive | Built-in |
| Spindle Motor Power | AC spindle motor 2.2/3.7 kW (3.0/5.0 hp) (continuous/30 minute rating) |
| Spindle C Axis | Position control only (synchronous control is an option) |
| Spindle Center Height From Floor | 1,100 mm (43.3 in) |
| Machine Dimensions | 1,690 × 1,980 × 1,756 mm (66.5 × 78.0 × 69.1 in) |
| Machine Weight | 2,500 kg (5,511 lb) including control board |
| Tank Capacity | 270 L |
Specifications sourced from seibudenki.com — verified 2026-10-05
Strengths & Limitations
Strengths
- Same 350 mm (13.8 in) X and 220 mm (8.7 in) Z travels as the SFG-35HP
- Built-in spindle to 3,000 min-1 with a Φ32 mm (1.3 in) through hole
- Cutting and grinding of inside and outside diameter workpieces in one chucking
- 0.1 µm minimum setting unit, with X programmed as diameter
- Compact for a combined process: 1,690 × 1,980 × 1,756 mm (66.5 × 78.0 × 69.1 in) and 2,500 kg (5,511 lb)
Limitations
- Setting unit is 0.1 µm; the SFG-35HP is set in 0.01 µm
- The X and Z scale is an option on this model
- Tank capacity is 270 L, with no larger tank in the table
- Maximum processing length is 100 mm (3.9 in)
Best For
Frequently Asked Questions
01
The SFG-35P has a 0.1 µm minimum setting unit and offers its 0.1 µm X and Z scale as an option. The SFG-35HP has a 0.01 µm setting unit and 0.01 µm scales, and its tank can be 270 or 370 L (option) where the SFG-35P lists 270 L. Travels, chuck, spindle, motor and weight match.
02
The maximum travel distance is 350 mm (13.8 in) on X and 220 mm (8.7 in) on Z, and the rapid traverse speed on both axes is 4,000 mm/min (157.5 ipm). The centre height above the top of the cross-saddle is 105 mm (4.1 in).
03
Yes. The main spindle C axis is listed as position control only. Synchronous control is an option. For spherical or free-form work of the kind Seibu shows for the SFG series, confirm with the maker which C-axis control the job needs.
04
The standard chuck is 6 inch. Seibu gives the maximum gripping work size as Φ150×L150, with a maximum processing length of 100 mm (3.9 in), and says the figure varies depending on workpiece shape, weight and cutting tool interference. The spindle through hole is Φ32 mm (1.3 in).
