Okuma MULTUS B300II
Image: d30jruhmdicmo0.cloudfront.net, Okuma
Key Specifications
Tool Capacity
Rapid Traverse
Spindle Power
standard chuck size
spindle speed
spindle nose
How much does the Okuma MULTUS B300II cost?
Estimated price range
Our best estimate for a mill-turn / multi-tasking machine in this class — not a quote from Okuma. Configuration moves it a long way.
Overview
The Okuma MULTUS B300II is a multitasking mill-turn machine with an 8 in standard chuck, a maximum turning diameter of 630 mm (24.80 in) and a spindle that runs 45–5,000 rpm on a JIS A2-6 nose.
The bracketed option changes the character of the machine. Okuma lists a JIS A2-8 nose and a 38–3,800 rpm range as alternatives, the direction to go for bigger chucks and larger bar at the cost of top speed. The table does not state that the two options are ordered together, so check both lines of a quotation. The spindle motor is listed as VAC 15/11 kW (VAC 20/15 hp).
That motor is smaller than the 22/15 kW (30/20 hp) of the Multus B250II, even though the MULTUS B300II has the larger turning diameter, so it suits parts that need the swing and the chuck more than they need heavy metal removal. Rapids are 40 m/min (1,575 ipm) in X and Z and 26 m/min (1,024 ipm) in Y, and the magazine holds 20 tools. The MULTUS U3000 covers similar diameters with 40 tools and 50 m/min (1,968 ipm) rapids on its Xa and Za axes.
Full Specifications
| Parameter | Value |
|---|---|
| Standard Chuck Size | 8 in |
| Spindle Speed | 45–5,000 [38–3,800] rpm |
| Spindle Nose | JIS A2-6 [JIS A2-8] |
| Rapid Traverse Rate | 40/26 m/min (1,575/1,024 ipm), X,Z/Y |
| Tool Capacity | 20 tools |
| Max Turning Diameter | 630 mm (24.80 in) |
| Spindle Motor Power | VAC 15/11 kW (VAC 20/15 hp) |
| Rapid Traverse X Z Y | 40/26 m/min (1,575/1,024 ipm) |
Specifications sourced from okuma.com — verified 2026-10-03
Strengths & Limitations
Strengths
- 8 in standard chuck with a 630 mm (24.80 in) maximum turning diameter
- Standard 45–5,000 rpm spindle on a JIS A2-6 nose, with a JIS A2-8 nose and 38–3,800 rpm range listed as options
- Rapid traverse of 40 m/min (1,575 ipm) in X and Z and 26 m/min (1,024 ipm) in Y
Limitations
- The VAC 15/11 kW (VAC 20/15 hp) motor is a modest rating for a 630 mm turning diameter
- 20 tools must cover both turning and milling operations
- Work length and milling spindle figures are not in the listed rows
Best For
Frequently Asked Questions
01
Standard is a JIS A2-6 nose with a 45–5,000 rpm range. The bracketed alternatives are a JIS A2-8 nose and a 38–3,800 rpm range. The motor is listed as VAC 15/11 kW (VAC 20/15 hp).
02
The magazine holds 20 tools. That total serves turning and milling alike, so parts with many features may need tool lists trimmed or combination tools. The MULTUS U3000 lists 40 tools for comparison.
03
The MULTUS B200II has a 6 in standard chuck, a 600 mm (23.62 in) maximum machining diameter and a faster 50~6,000 min⁻¹ spindle with an 11/7.5 kW (15/10 hp) PREX motor. The MULTUS B300II steps up to an 8 in chuck, 630 mm (24.80 in) and VAC 15/11 kW. Both list 20 tools and the same 40/26 m/min rapids.
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