Okuma LB2500 EX II
Image: d30jruhmdicmo0.cloudfront.net, Okuma
Key Specifications
Rapid Traverse
Spindle Power
Max Turn Length
max turning diameter
spindle nose
z axis travel
How much does the Okuma LB2500 EX II cost?
Estimated price range
Our best estimate for a cnc lathes / turning center in this class — not a quote from Okuma. Configuration moves it a long way.
Overview
The Okuma LB2500 EX II pairs a 410 mm (16.14 in) maximum turning diameter with a 22/15 kW (30/20 hp) spindle on a JIS A2-6 nose, running 45–5,000 rpm. For this diameter class that is a strong, fast spindle, and the lower 15 kW (20 hp) figure is the one sustained roughing has to live within.
The length rows deserve a second look before a job is quoted. Okuma gives a maximum turning length of 150 mm (5.91 in) and a Z-axis travel of 560 mm (22 in). A 560 mm stroke is far more than a 150 mm part needs, so ask Okuma which configuration the turning-length figure describes and what length the machine on offer will actually turn.
Rapid traverse is 25/30 m/min (984/1181 ipm). The LB3000 EX III carries the same 22 kW (30 hp) spindle power with 25 m/min in X and 30 m/min in Z, so the two sit close together. The LB2000 EX III is the lighter choice at 11/7.5 kW (15/10 hp).
Full Specifications
| Parameter | Value |
|---|---|
| Max Turning Diameter | 410 mm (16.14 in) |
| Max Turning Length | 150 mm (5.91 in) |
| Spindle Motor Power | 22/15 kW (30/20 hp) |
| Spindle Nose | JIS A2-6 |
| Z Axis Travel | 560 mm (22 in) |
| Rapid Traverse Rate | 25/30 m/min (984/1181 ipm) |
| Spindle Speed | 45–5,000 rpm |
Specifications sourced from okuma.com — verified 2026-10-03
Strengths & Limitations
Strengths
- 22/15 kW (30/20 hp) spindle power on a JIS A2-6 nose
- 45–5,000 rpm spindle speed range
- 410 mm (16.14 in) maximum turning diameter
- 560 mm (22 in) of Z-axis travel with 25/30 m/min (984/1181 ipm) rapids
Limitations
- Listed maximum turning length is 150 mm (5.91 in), short against 560 mm (22 in) of Z travel; confirm it before planning long parts
- The nose is JIS A2-6, where the LB4000 EX III starts at JIS A2-8
- Okuma's headline rows give no chuck size, bar capacity or turret details
Best For
Frequently Asked Questions
01
Okuma lists 410 mm (16.14 in) of maximum turning diameter and 150 mm (5.91 in) of maximum turning length. Z-axis travel is 560 mm (22 in), much longer than the turning length, so confirm the usable length with Okuma.
02
Spindle power is 22/15 kW (30/20 hp) and the speed range is 45–5,000 rpm, on a JIS A2-6 spindle nose. Rapid traverse is 25/30 m/min (984/1181 ipm).
03
The LB2000 EX III is listed with 11/7.5 kW (15/10 hp), a 430 mm (16.93 in) turning diameter and 300 mm (11.81 in) of turning length. The LB2500 EX II has twice the spindle power at 22/15 kW (30/20 hp) on a 410 mm (16.14 in) diameter.
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