Star Micronics SV-20R

Est. $220,000 - $360,000 Specs verified 2026-10-03 · ellisontechnologies.com Updated 2026-10-03

Image: starcnc.com, Star Micronics

Key Specifications

Max Spindle

10,000 rpm

Rapid Traverse

30 m/min (for X1, X2, X3, Y1, Z1, Z2, Z3 axes)

Spindle Power

3.7 kW (continuous) / 5.5 kW (10min. / 60%ED)

Max Turn Length

205mm (8in)

max headstock stroke

205 mm (8 in)

max part projection

75 mm (2-16/64 in)

How much does the Star Micronics SV-20R cost?

Estimated price range

Est.$220,000 - $360,000

Our best estimate for a swiss-type lathe in this class — not a quote from Star Micronics. Configuration moves it a long way.

Overview

The Star Micronics SV-20R combines a gang tool post with an 8-station turret on a Ø20 mm (25/32 in) Swiss-type lathe. The gang holds 6 tools at 16 mm or 7 at 12 mm; each turret station holds 1 tool at 16 mm or 3 at 12 mm; and a stationary 8-spindle unit carries 8 tools for back working.

The two tool carriers do different jobs. A gang post is quick, because the next tool is a short slide away, so it suits the turning tools that work on every part. The turret adds room for the drills, boring bars and taps that vary from job to job, and it moves on its own slide: the rapid row lists X1, X2, X3, Y1, Z1, Z2 and Z3 at 30 m/min, three X and three Z axes with one Y. Choosing 12 mm shanks triples the turret's capacity per station, at the cost of a less rigid tool.

Headstock stroke and maximum turning length are both 205 mm (8 in), and maximum part projection is listed at 75 mm. The main spindle runs to 10,000 rpm with 3.7 kW continuous and 5.5 kW at the 10min. / 60%ED rating. The sub-spindle also reaches 10,000 rpm on a smaller motor: 2.2 kW continuous and 3.7 kW (10min./40%ED).

At 4,150 kg and 2,730 × 1,350 × 1,865 mm, the SV-20R is a heavy machine for its bar size; the SR-20J, listed with 6 tools, weighs 2,750 kg. The extra mass comes with the turret and the third slide. If a part family never fills the gang post, the lighter machine is the simpler choice. If changeovers keep running out of tool stations, this layout answers that.

Full Specifications

Parameter	Value
Max Headstock Stroke	205 mm (8 in)
Max Part Projection	75 mm (2-16/64 in)
Sub Spindle Speed	10,000 rpm
Sub Spindle Power	2.2 kW (continuous) / 3.7 kW (10min./40%ED)
Gang Type Tools	6 tools (16 mm) or 7 tools (12 mm)
Turret Type Tools	1 tool/station (16 mm) or 3 tools/station (12 mm)
Back 8 Spindle Stationary	8 tools
Machine Weight	4,150 kg
Max Turning Diameter	ø20mm (25/32in)
Max Turning Length	205mm (8in)
Bar Capacity	Ø20 mm (25/32 in)
Turret Stations	8 stations
Max Spindle Speed	10,000 rpm
Spindle Motor Power	3.7 kW (continuous) / 5.5 kW (10min. / 60%ED)
Headstock Stroke	205 mm (8 in)
Turning Tools	6 tools (16 mm), 7 tools (12 mm)
Rapid Traverse Rate	30 m/min (for X1, X2, X3, Y1, Z1, Z2, Z3 axes)
Floor Space Required	2,730 × 1,350 × 1,865 mm

Specifications sourced from ellisontechnologies.com (authorised dealer / distributor, not the manufacturer's own site) — verified 2026-10-03

Strengths & Limitations

Strengths

Gang post (6 tools at 16 mm or 7 at 12 mm) plus an 8-station turret on one machine
Turret stations take 3 tools each with 12 mm shanks
Stationary back unit with 8 tools for sub-spindle work
10,000 rpm on both main and sub-spindle
30 m/min rapids across X1, X2, X3, Y1, Z1, Z2 and Z3

Limitations

Sub-spindle power is 2.2 kW continuous and 3.7 kW (10min./40%ED), well below the main spindle's 5.5 kW short-time rating
With 16 mm shanks the turret holds only 1 tool per station
Maximum part projection is 75 mm against a 205 mm (8 in) headstock stroke, so long parts need checking for back-end handling
Only one Y axis (Y1) appears in the rapid traverse row
4,150 kg, against 2,750 kg for the SR-20J

Best For

Ø20 mm (25/32 in) parts needing more tools than a gang post alone holds Varied part families kept tooled up across gang and turret Parts up to 205 mm (8 in) long Back working with up to 8 tools on the stationary unit

Frequently Asked Questions

01 How many tools does the SV-20R carry?

The gang post takes 6 tools at 16 mm or 7 tools at 12 mm. The turret has 8 stations, each holding 1 tool at 16 mm or 3 tools at 12 mm. The back 8-spindle stationary unit adds 8 tools. The total therefore depends on the shank size chosen.

02 What is the longest part the SV-20R can turn?

Headstock stroke and maximum turning length are both listed as 205 mm (8 in). Maximum part projection is 75 mm. Bar capacity and maximum turning diameter are Ø20 mm (25/32 in).

03 How do the main and sub-spindles compare?

Both reach 10,000 rpm. The main spindle is rated 3.7 kW continuous and 5.5 kW (10min. / 60%ED). The sub-spindle is rated 2.2 kW continuous and 3.7 kW (10min./40%ED), so the sub-spindle's short-time rating equals the main spindle's continuous one.

04 How does the SV-20R compare with the SR-20J?

Both take Ø20 mm (25/32 in) bar, run to 10,000 rpm and list a 205 mm (8 in) turning length, the SR-20J in its Type C form. The SR-20J is listed with 6 tools, a 2.2 kW continuous spindle and a weight of 2,750 kg. The SV-20R adds the 8-station turret, has 3.7 kW continuous and weighs 4,150 kg.

05 What floor space does the SV-20R need?

The listed footprint is 2,730 × 1,350 × 1,865 mm and the weight is 4,150 kg. A bar feeder is not mentioned in the table, so allow for its length separately.