Sunnen SV-310
This model was not found in Sunnen's current lineup when we checked on 2026-10-03 . It may be a superseded or older model; the specifications below are as we last recorded them.
Key Specifications
bore diameter range
max workpiece height
stroke length
spindle speed range
stroke rate
surface finish achievable
How much does the Sunnen SV-310 cost?
Estimated price range
Our best estimate for a cnc boring machine in this class — not a quote from Sunnen. Configuration moves it a long way.
Overview
With a stroke of 0 to 400 mm (0 to 15.7 in) and room for a workpiece 500 mm (19.7 in) tall, the Sunnen SV-310 is a honing machine for short, stiff parts and not for long tubes. Its listed bore diameter range is 25 to 200 mm (1 to 7.9 in). The SV-310 is not in Sunnen's current lineup, and the listed figures on this page have not been confirmed against a maker document, so use them as a starting point when looking at a used machine.
Height is the figure to check first. The table gives a maximum workpiece height, not a length, which points to a part that stands under the spindle, and 500 mm (19.7 in) has to cover the part and whatever fixture holds it. The 400 mm (15.7 in) stroke then sets how deep a bore can be worked in one setup, less the overrun the tool needs at each end.
The spindle range is 60 to 700 RPM and the stroke rate goes up to 60 strokes/min. Those two together set the crosshatch angle. The fairly high top values suit the small end of the bore range, where a 25 mm (1 in) bore needs more revolutions to reach a useful surface speed.
The listed results are tight: bore roundness under 0.001 mm and a surface finish of Ra 0.05 to 0.8 µm. Size is held by active in-process gauging, listed as the Sunnen PBG system, under a Sunnen SG5 CNC. The machine weighs about 2,200 kg (4,850 lb). No floor-space or power rows are listed.
Full Specifications
| Parameter | Value |
|---|---|
| Bore Diameter Range | 25 - 200 mm (1 - 7.9 in) |
| Max Workpiece Height | 500 mm (19.7 in) |
| Stroke Length | 0 - 400 mm (0 - 15.7 in) |
| Spindle Speed Range | 60 - 700 RPM |
| Stroke Rate | Up to 60 strokes/min |
| Surface Finish Achievable | Ra 0.05 - 0.8 µm |
| Bore Roundness | < 0.001 mm |
| In Process Gauging | Active (Sunnen PBG system) |
| CNC Control | Sunnen SG5 CNC |
| Machine Weight | ~2,200 kg (4,850 lb) |
Specifications compiled from manufacturer literature and industry references. Not independently verified against a published spec sheet — confirm with the manufacturer or an authorised dealer before making a purchasing decision.
Strengths & Limitations
Strengths
- Listed bore roundness under 0.001 mm with a surface finish range of Ra 0.05 to 0.8 µm
- Active in-process gauging through the Sunnen PBG system, run from a Sunnen SG5 CNC
- Spindle speeds of 60 to 700 RPM and up to 60 strokes/min help bores near 25 mm (1 in) reach a useful surface speed
- Stroke is adjustable from 0 to 400 mm (0 to 15.7 in), so a shallow bore is not forced into a long stroke
Limitations
- The SV-310 is not in Sunnen's current lineup and its listed figures are unverified
- Workpiece height is capped at 500 mm (19.7 in), fixture included
- Bores above 200 mm (7.9 in) or below 25 mm (1 in) are outside the listed range
- The finish range ends at Ra 0.8 µm on the coarse side, so rougher specified finishes are not covered by the listed figures
Best For
Frequently Asked Questions
01
Maximum workpiece height is listed as 500 mm (19.7 in). The fixture counts against that figure, so measure the part and its holding together. Bore depth is governed separately by the stroke, listed as 0 to 400 mm (0 to 15.7 in).
02
The in-process gauging row reads active, with the Sunnen PBG system named, and the control is listed as a Sunnen SG5 CNC. Active gauging measures the bore during the cycle and stops the hone at size, which is how a roundness figure of under 0.001 mm can be held from part to part. The table does not expand the PBG abbreviation or give a gauging resolution.
03
Spindle speed is listed at 60 to 700 RPM and stroke rate at up to 60 strokes/min. The ratio between the two sets the crosshatch angle on the bore wall, and the upper values are most useful at the small end of the 25 to 200 mm (1 to 7.9 in) diameter range.
04
It is not in Sunnen's current lineup and may be an older model. The listed figures were not compared with a maker page. For a used SV-310, confirm the stroke, the gauging equipment fitted and the weight of about 2,200 kg (4,850 lb) from the machine's own paperwork.
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