Star Micronics SR-32JIII Type A/B

Est. $200,000 - $320,000 Specs verified 2026-10-03 · starcnc.com Updated 2026-10-03

Image: starcnc.com, Star Micronics

Key Specifications

max machining diameter

32 mm (1-1/4 in), optional 34 mm (1-11/32 in)

max headstock stroke standard

320 mm (12-19/32 in)

main spindle speed

8,000 RPM

main spindle power

7.5 kW continuous / 11 kW (10 min, 25% ED)

sub spindle speed

8,000 RPM

sub spindle power

3.7 kW continuous / 5.5 kW (10 min, 40% ED)

How much does the Star Micronics SR-32JIII Type A/B cost?

Estimated price range

Est.$200,000 - $320,000

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 SR-32JIII Type A/B is a Swiss-type lathe for 32 mm (1-1/4 in) bar, optionally 34 mm (1-11/32 in), with a standard headstock stroke of 320 mm (12-19/32 in). Type A and Type B are one machine with different back working units: Type A carries 6 tools there, Type B carries 8 tools and gives that unit a Y axis.

That single row decides which type to buy. On Type B, the Y axis on the back working unit lets tools reach off-centre features on the cut-off end of the part, work that Type A has to do on centre or hand to the main side. If the back of your parts needs only centre drilling, tapping and turning, the 6 tools of Type A are enough.

The front of the machine is common to both. There are 6 turning tools on 16 mm shanks and a 5-spindle sleeve holder, with 5 tools facing the front and 5 facing the rear. The main spindle runs to 8,000 RPM with 7.5 kW continuous and 11 kW (10 min, 25% ED). The sub spindle matches it at 8,000 RPM with 3.7 kW continuous and 5.5 kW (10 min, 40% ED), about half the power of the main spindle.

Star lists a 275 L coolant tank, a weight of 4,100 kg (9,039 lb) and dimensions of 2,690 x 1,345 x 1,780 mm, with a FANUC 32i-B control. The SR-32J lists a maximum turning length of 310mm (12-13/64in), against the 320 mm (12-19/32 in) headstock stroke here.

Full Specifications

Parameter	Value
Max Machining Diameter	32 mm (1-1/4 in), optional 34 mm (1-11/32 in)
Max Headstock Stroke Standard	320 mm (12-19/32 in)
Main Spindle Speed	8,000 RPM
Main Spindle Power	7.5 kW continuous / 11 kW (10 min, 25% ED)
Sub Spindle Speed	8,000 RPM
Sub Spindle Power	3.7 kW continuous / 5.5 kW (10 min, 40% ED)
Front Turning Tools	6 tools (16 mm shank)
Sleeve Holder	5-spindle (front 5 / rear 5 tools)
Back Working Unit	Type A: 6 tools / Type B: 8 tools (Y-axis)
CNC Control	FANUC 32i-B
Coolant Tank	275 L
Machine Weight	4,100 kg (9,039 lb)
Dimensions	2,690 x 1,345 x 1,780 mm

Specifications sourced from starcnc.com — verified 2026-10-03

Strengths & Limitations

Strengths

Type B back working unit holds 8 tools with a Y axis; Type A holds 6 tools
Bar capacity of 32 mm (1-1/4 in) can be raised to 34 mm (1-11/32 in) as an option
320 mm (12-19/32 in) standard headstock stroke
Main spindle of 7.5 kW continuous and 11 kW (10 min, 25% ED) at up to 8,000 RPM
Sub spindle reaches the same 8,000 RPM as the main spindle
16 mm shanks on the 6 front turning tools

Limitations

Type A has no Y axis on the back working unit and 2 fewer tools there than Type B
Sub spindle power is 3.7 kW continuous, about half the 7.5 kW of the main spindle
The 34 mm (1-11/32 in) bar size is an option, not the standard capacity
At 4,100 kg (9,039 lb) and 2,690 x 1,345 x 1,780 mm it needs a planned position, with the bar feeder on top of that length

Best For

Shaft-type parts from 32 mm (1-1/4 in) bar within a 320 mm (12-19/32 in) stroke Type B: parts with off-centre features on the back end Type A: parts whose back end needs only on-centre work Turning with 16 mm shank tools and up to 7.5 kW of continuous spindle power

Frequently Asked Questions

01 What is the difference between Type A and Type B of the SR-32JIII?

The back working unit. Type A has 6 tools on it. Type B has 8 tools and a Y axis on that unit, so it can position tools off the spindle centreline when working the back end of a part. The rest of the table, including spindles, front tooling and bar size, is given once for both types.

02 Can the SR-32JIII take bar larger than 32 mm?

Yes, as an option. The standard maximum machining diameter is 32 mm (1-1/4 in) and Star lists 34 mm (1-11/32 in) as optional. If you run 34 mm stock, state that when ordering so the machine is supplied for it.

03 How do the main and sub spindles compare?

Both run to 8,000 RPM. The main spindle is rated 7.5 kW continuous and 11 kW (10 min, 25% ED). The sub spindle is rated 3.7 kW continuous and 5.5 kW (10 min, 40% ED). The sub spindle therefore keeps up on speed but has about half the power, which suits finishing and lighter back-end cuts.

04 How is the front tooling arranged?

The front carries 6 turning tools on 16 mm shanks, plus a 5-spindle sleeve holder with 5 tools to the front and 5 to the rear. The rear-facing tools of the sleeve holder work on the part held in the sub spindle, in addition to the back working unit.

05 What does the SR-32JIII need for installation?

The machine measures 2,690 x 1,345 x 1,780 mm and weighs 4,100 kg (9,039 lb), with a 275 L coolant tank. The table does not state the electrical supply, and a bar feeder for 320 mm (12-19/32 in) stroke work adds to the length, so ask Star for the layout drawing.