Yamazaki Mazak Vertical Machining Centers

Mazak FJV BT50

$200,000 - $300,000 Updated 2026-03-13

Key Specifications

X Travel

1,270 mm (50 in)

Y Travel

760 mm (29.9 in)

Z Travel

510 mm (20.1 in)

Max Spindle

10,000 RPM

Spindle Taper

BT 50

Tool Capacity

30 (arm-type ATC)

Overview

The Mazak FJV BT50 is the heavy-duty variant of the FJV bridge-type vertical machining center, stepping up from the BT40 version with a 50-taper spindle for maximum tool clamping force and cutting power. The bridge construction provides the same symmetric rigidity advantage as the BT40, but the BT 50 taper unlocks aggressive roughing capability in steel, cast iron, and titanium that the 40-taper cannot match.

The FJV BT50 offers travel of approximately 1,270 x 760 x 510 mm (50 x 29.9 x 20.1 in), with the larger frame accommodating both the heavier spindle and bigger workpieces. The BT 50 spindle turns at up to 10,000 RPM with 30 kW (40 hp), providing the torque needed for large face mills, heavy boring bars, and aggressive roughing parameters.

The bridge design distributes cutting forces symmetrically through the column on both sides, which is particularly important when running heavy cuts. Where a C-frame machine would deflect under high side loads during face milling at full Y-extension, the FJV BT50 maintains rigidity. Table load capacity reaches 2,500 kg (5,512 lb) for heavy mold bases and structural steel workpieces.

The 30-station arm-type ATC handles the larger BT 50 tools. Rapid traverse reaches 36 m/min. The MAZATROL SmoothG CNC provides the same programming environment found across the Mazak lineup.

Competitors include the Okuma MCR-A5CII, DMG Mori DMF 260, and Johnford DMC series. New FJV BT50 machines price between $200,000 and $300,000. Used units from 2000-2018 trade between $60,000 and $160,000.

Full Specifications

Parameter	Value
X-Axis Travel	1,270 mm (50 in)
Y-Axis Travel	760 mm (29.9 in)
Z-Axis Travel	510 mm (20.1 in)
Max Spindle Speed	10,000 RPM
Spindle Taper	BT 50
Spindle Motor Power	30 kW (40 hp)
Tool Capacity	30 (arm-type ATC)
Table Size	157.48" × 78.74"
Max Table Load	2,500 kg (5,512 lb)
Rapid Traverse Rate	36 m/min
Machine Type	Bridge-type construction
CNC Control	MAZATROL SmoothG CNC
Guide Type	Linear roller guides
Machine Weight	13,000 kg (28,660 lb) approx.
Motor Output	30 min. rating [40%ED]
Cont Rating	239 N・m (176 ft･lbs)
Motor Torque	30 min. rating [40%ED]
Tool Shank	CAT No.50
Max Spindle Speed	10000 min-1(rpm)

Specifications sourced from mazak.com — verified 2026-03-28

Strengths & Limitations

Strengths

BT 50 taper provides maximum tool clamping force for heavy roughing with large face mills, boring bars, and shell mills
30 kW spindle delivers the torque needed for aggressive material removal in steel, cast iron, and titanium
Bridge construction eliminates cantilever deflection even under heavy cutting loads at full Y-extension
2,500 kg table load supports heavy mold bases, die plates, and large structural workpieces without deflection concern
1,270 mm X-travel and 760 mm Y-travel provide a generous work envelope for large-part machining
Symmetric force distribution produces consistent surface finish and tolerance holding across the full envelope
Strong used market makes heavy-duty bridge-type machining accessible at significantly lower cost than new

Limitations

13,000 kg machine weight requires substantial foundation preparation and limits placement flexibility
10,000 RPM spindle speed is lower than BT 40 variants, limiting high-speed aluminum work
Starting at $200,000, the FJV BT50 represents a significant capital investment over C-frame alternatives
BT 50 tooling costs more than BT 40 across holders, collets, and cutting tools
Larger footprint than C-frame VMCs with comparable X-travel requires more floor space

Best For

Mold and die shops roughing and finishing large mold halves in P20, H13, and other tool steels Aerospace manufacturers machining structural components from titanium, Inconel, and high-strength aluminum requiring heavy stock removal Heavy equipment manufacturers machining large steel weldments, brackets, and structural plates Shops producing large die plates and press tooling that need bridge rigidity with heavy cutting power Energy sector manufacturers machining large valve bodies, pump housings, and turbine components in steel and cast iron

Frequently Asked Questions

01 What does a new Mazak FJV BT50 cost?

New FJV BT50 machines range from $200,000 to $300,000 depending on configuration. Used units from 2000-2018 trade between $60,000 and $160,000, offering significant savings for shops that can work with older control generations.

02 When should I choose the FJV BT50 over the FJV BT40?

Choose the BT50 when your primary work involves heavy roughing in steel, cast iron, or titanium where tool clamping force and spindle torque are critical. The BT40 is better for high-speed work in aluminum and lighter materials where RPM matters more than torque. Many mold shops choose BT50 for roughing and use a separate high-speed machine for finishing.

03 How does the FJV BT50 handle mold steel?

The FJV BT50 excels at mold steel machining. The bridge construction provides consistent rigidity across the full envelope, while the 30 kW BT 50 spindle handles aggressive roughing in P20, H13, and similar steels. The machine is commonly used for both roughing and semi-finishing of large mold bases.

04 What foundation does the FJV BT50 need?

At 13,000 kg, the FJV BT50 requires a solid concrete foundation, typically 200+ mm (8+ inches) thick with proper isolation from other machinery. Consult the Mazak installation guide and your facilities team for specific requirements based on soil conditions and floor construction.